From: Richard W.M. Jones Date: Wed, 13 Apr 2011 22:27:05 +0000 (+0100) Subject: inspect: Split code into separate files. X-Git-Tag: 1.11.1~9 X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=3336b5448f12c9eb25bf7a0cecda1315c4cf07ea;p=libguestfs.git inspect: Split code into separate files. The src/inspect.c file had grown rather large -- 3,500 lines. Split it across several files according to function. This is just moving code. After the split the files are more evenly divided: 536 src/inspect_apps.c 766 src/inspect.c 537 src/inspect_fs.c 404 src/inspect_fs_cd.c 785 src/inspect_fs_unix.c 535 src/inspect_fs_windows.c 3563 total --- diff --git a/inspector/example-debian.xml b/inspector/example-debian.xml index cead573..c699d77 100644 --- a/inspector/example-debian.xml +++ b/inspector/example-debian.xml @@ -10,6 +10,7 @@ 0 deb apt + installed / /usr diff --git a/inspector/example-fedora.xml b/inspector/example-fedora.xml index 6e03a12..797aa58 100644 --- a/inspector/example-fedora.xml +++ b/inspector/example-fedora.xml @@ -10,6 +10,7 @@ 0 rpm yum + installed / /boot diff --git a/inspector/example-ubuntu.xml b/inspector/example-ubuntu.xml index 61338e1..6169781 100644 --- a/inspector/example-ubuntu.xml +++ b/inspector/example-ubuntu.xml @@ -10,6 +10,7 @@ 10 deb apt + installed / /boot diff --git a/po/POTFILES.in b/po/POTFILES.in index a1a539f..3077ebe 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -138,6 +138,11 @@ src/events.c src/filearch.c src/guestfs.c src/inspect.c +src/inspect_apps.c +src/inspect_fs.c +src/inspect_fs_cd.c +src/inspect_fs_unix.c +src/inspect_fs_windows.c src/launch.c src/listfs.c src/match.c diff --git a/src/Makefile.am b/src/Makefile.am index 1bf8e54..6aea6cc 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -127,6 +127,11 @@ libguestfs_la_SOURCES = \ events.c \ filearch.c \ inspect.c \ + inspect_apps.c \ + inspect_fs.c \ + inspect_fs_cd.c \ + inspect_fs_unix.c \ + inspect_fs_windows.c \ launch.c \ listfs.c \ match.c \ diff --git a/src/guestfs-internal.h b/src/guestfs-internal.h index 46576bb..b75aee8 100644 --- a/src/guestfs-internal.h +++ b/src/guestfs-internal.h @@ -60,6 +60,31 @@ #define xdr_uint32_t xdr_u_int32_t #endif +/* Some limits on what the inspection code will read, for safety. */ + +/* Small text configuration files. + * + * The upper limit is for general files that we grep or download. The + * largest such file is probably "txtsetup.sif" from Windows CDs + * (~500K). This number has to be larger than any legitimate file and + * smaller than the protocol message size. + * + * The lower limit is for files parsed by Augeas on the daemon side, + * where Augeas is running in reduced memory and can potentially + * create a lot of metadata so we really need to be careful about + * those. + */ +#define MAX_SMALL_FILE_SIZE (2 * 1000 * 1000) +#define MAX_AUGEAS_FILE_SIZE (100 * 1000) + +/* Maximum Windows Registry hive that we will download to /tmp. Some + * registries can be legitimately very large. + */ +#define MAX_REGISTRY_SIZE (100 * 1000 * 1000) + +/* Maximum RPM or dpkg database we will download to /tmp. */ +#define MAX_PKG_DB_SIZE (10 * 1000 * 1000) + /* Network configuration of the appliance. Note these addresses are * only meaningful within the context of the running appliance. QEMU * translates network connections to these magic addresses into @@ -320,6 +345,21 @@ extern void guestfs___rollback_cmdline (guestfs_h *g, int pos); extern void guestfs___call_callbacks_void (guestfs_h *g, uint64_t event); extern void guestfs___call_callbacks_message (guestfs_h *g, uint64_t event, const char *buf, size_t buf_len); extern void guestfs___call_callbacks_array (guestfs_h *g, uint64_t event, const uint64_t *array, size_t array_len); +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) +extern int guestfs___check_for_filesystem_on (guestfs_h *g, const char *device, int is_block, int is_partnum); +extern int guestfs___download_to_tmp (guestfs_h *g, const char *filename, const char *basename, int64_t max_size); +extern char *guestfs___case_sensitive_path_silently (guestfs_h *g, const char *); +extern struct inspect_fs *guestfs___search_for_root (guestfs_h *g, const char *root); +extern int guestfs___parse_unsigned_int (guestfs_h *g, const char *str); +extern int guestfs___parse_unsigned_int_ignore_trailing (guestfs_h *g, const char *str); +extern int guestfs___parse_major_minor (guestfs_h *g, struct inspect_fs *fs); +extern char *guestfs___first_line_of_file (guestfs_h *g, const char *filename); +extern int guestfs___first_egrep_of_file (guestfs_h *g, const char *filename, const char *eregex, int iflag, char **ret); +extern int guestfs___check_installer_root (guestfs_h *g, struct inspect_fs *fs); +extern int guestfs___check_linux_root (guestfs_h *g, struct inspect_fs *fs); +extern int guestfs___check_freebsd_root (guestfs_h *g, struct inspect_fs *fs); +extern int guestfs___check_windows_root (guestfs_h *g, struct inspect_fs *fs); +#endif #define error(g,...) guestfs_error_errno((g),0,__VA_ARGS__) #define perrorf guestfs_perrorf diff --git a/src/inspect.c b/src/inspect.c index 8213936..fc8d8df 100644 --- a/src/inspect.c +++ b/src/inspect.c @@ -48,98 +48,7 @@ #if defined(HAVE_PCRE) && defined(HAVE_HIVEX) -/* Some limits on what we will read, for safety. */ - -/* Small text configuration files. - * - * The upper limit is for general files that we grep or download. The - * largest such file is probably "txtsetup.sif" from Windows CDs - * (~500K). This number has to be larger than any legitimate file and - * smaller than the protocol message size. - * - * The lower limit is for files parsed by Augeas on the daemon side, - * where Augeas is running in reduced memory and can potentially - * create a lot of metadata so we really need to be careful about - * those. - */ -#define MAX_SMALL_FILE_SIZE (2 * 1000 * 1000) -#define MAX_AUGEAS_FILE_SIZE (100 * 1000) - -/* Maximum Windows Registry hive that we will download to /tmp. Some - * registries can be legitimately very large. - */ -#define MAX_REGISTRY_SIZE (100 * 1000 * 1000) - -/* Maximum RPM or dpkg database we will download to /tmp. */ -#define MAX_PKG_DB_SIZE (10 * 1000 * 1000) - -/* Compile all the regular expressions once when the shared library is - * loaded. PCRE is thread safe so we're supposedly OK here if - * multiple threads call into the libguestfs API functions below - * simultaneously. - */ -static pcre *re_fedora; -static pcre *re_rhel_old; -static pcre *re_rhel; -static pcre *re_rhel_no_minor; -static pcre *re_major_minor; -static pcre *re_aug_seq; -static pcre *re_xdev; -static pcre *re_first_partition; -static pcre *re_freebsd; -static pcre *re_windows_version; - -static void compile_regexps (void) __attribute__((constructor)); -static void free_regexps (void) __attribute__((destructor)); - -static void -compile_regexps (void) -{ - const char *err; - int offset; - -#define COMPILE(re,pattern,options) \ - do { \ - re = pcre_compile ((pattern), (options), &err, &offset, NULL); \ - if (re == NULL) { \ - ignore_value (write (2, err, strlen (err))); \ - abort (); \ - } \ - } while (0) - - COMPILE (re_fedora, "Fedora release (\\d+)", 0); - COMPILE (re_rhel_old, - "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+).*Update (\\d+)", 0); - COMPILE (re_rhel, - "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+)\\.(\\d+)", 0); - COMPILE (re_rhel_no_minor, - "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+)", 0); - COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0); - COMPILE (re_aug_seq, "/\\d+$", 0); - COMPILE (re_xdev, "^/dev/(?:h|s|v|xv)d([a-z]\\d*)$", 0); - COMPILE (re_first_partition, "^/dev/(?:h|s|v)d.1$", 0); - COMPILE (re_freebsd, "^/dev/ad(\\d+)s(\\d+)([a-z])$", 0); - COMPILE (re_windows_version, "^(\\d+)\\.(\\d+)", 0); -} - -static void -free_regexps (void) -{ - pcre_free (re_fedora); - pcre_free (re_rhel_old); - pcre_free (re_rhel); - pcre_free (re_rhel_no_minor); - pcre_free (re_major_minor); - pcre_free (re_aug_seq); - pcre_free (re_xdev); - pcre_free (re_first_partition); - pcre_free (re_freebsd); - pcre_free (re_windows_version); -} - /* The main inspection code. */ -static int check_for_filesystem_on (guestfs_h *g, const char *device, int is_block, int is_partnum); - char ** guestfs__inspect_os (guestfs_h *g) { @@ -161,1878 +70,59 @@ guestfs__inspect_os (guestfs_h *g) size_t i; for (i = 0; devices[i] != NULL; ++i) { - if (check_for_filesystem_on (g, devices[i], 1, 0) == -1) { + if (guestfs___check_for_filesystem_on (g, devices[i], 1, 0) == -1) { guestfs___free_string_list (devices); guestfs___free_inspect_info (g); - return NULL; - } - } - guestfs___free_string_list (devices); - - /* Look at all partitions. */ - char **partitions; - partitions = guestfs_list_partitions (g); - if (partitions == NULL) { - guestfs___free_inspect_info (g); - return NULL; - } - - for (i = 0; partitions[i] != NULL; ++i) { - if (check_for_filesystem_on (g, partitions[i], 0, i+1) == -1) { - guestfs___free_string_list (partitions); - guestfs___free_inspect_info (g); - return NULL; - } - } - guestfs___free_string_list (partitions); - - /* Look at all LVs. */ - if (guestfs___feature_available (g, "lvm2")) { - char **lvs; - lvs = guestfs_lvs (g); - if (lvs == NULL) { - guestfs___free_inspect_info (g); - return NULL; - } - - for (i = 0; lvs[i] != NULL; ++i) { - if (check_for_filesystem_on (g, lvs[i], 0, 0) == -1) { - guestfs___free_string_list (lvs); - guestfs___free_inspect_info (g); - return NULL; - } - } - guestfs___free_string_list (lvs); - } - - /* At this point we have, in the handle, a list of all filesystems - * found and data about each one. Now we assemble the list of - * filesystems which are root devices and return that to the user. - * Fall through to guestfs__inspect_get_roots to do that. - */ - char **ret = guestfs__inspect_get_roots (g); - if (ret == NULL) - guestfs___free_inspect_info (g); - return ret; -} - -/* Find out if 'device' contains a filesystem. If it does, add - * another entry in g->fses. - */ -static int check_filesystem (guestfs_h *g, const char *device, int is_block, int is_partnum); -static int check_linux_root (guestfs_h *g, struct inspect_fs *fs); -static int check_freebsd_root (guestfs_h *g, struct inspect_fs *fs); -static int check_installer_root (guestfs_h *g, struct inspect_fs *fs); -static void check_architecture (guestfs_h *g, struct inspect_fs *fs); -static int check_hostname_unix (guestfs_h *g, struct inspect_fs *fs); -static int check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs); -static int check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs); -static int check_fstab (guestfs_h *g, struct inspect_fs *fs); -static int check_windows_root (guestfs_h *g, struct inspect_fs *fs); -static int check_windows_arch (guestfs_h *g, struct inspect_fs *fs); -static int check_windows_software_registry (guestfs_h *g, struct inspect_fs *fs); -static int check_windows_system_registry (guestfs_h *g, struct inspect_fs *fs); -static char *map_registry_disk_blob (guestfs_h *g, const char *blob); -static char *case_sensitive_path_silently (guestfs_h *g, const char *); -static int is_file_nocase (guestfs_h *g, const char *); -static int is_dir_nocase (guestfs_h *g, const char *); -static int extend_fses (guestfs_h *g); -static int parse_unsigned_int (guestfs_h *g, const char *str); -static int parse_unsigned_int_ignore_trailing (guestfs_h *g, const char *str); -static int add_fstab_entry (guestfs_h *g, struct inspect_fs *fs, - const char *spec, const char *mp); -static char *resolve_fstab_device (guestfs_h *g, const char *spec); -static void check_package_format (guestfs_h *g, struct inspect_fs *fs); -static void check_package_management (guestfs_h *g, struct inspect_fs *fs); -static int download_to_tmp (guestfs_h *g, const char *filename, const char *basename, int64_t max_size); -static int inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char *filename, int (*f) (guestfs_h *, struct inspect_fs *)); -static char *first_line_of_file (guestfs_h *g, const char *filename); -static int first_egrep_of_file (guestfs_h *g, const char *filename, const char *eregex, int iflag, char **ret); - -static int -check_for_filesystem_on (guestfs_h *g, const char *device, - int is_block, int is_partnum) -{ - /* Get vfs-type in order to check if it's a Linux(?) swap device. - * If there's an error we should ignore it, so to do that we have to - * temporarily replace the error handler with a null one. - */ - guestfs_error_handler_cb old_error_cb = g->error_cb; - g->error_cb = NULL; - char *vfs_type = guestfs_vfs_type (g, device); - g->error_cb = old_error_cb; - - int is_swap = vfs_type && STREQ (vfs_type, "swap"); - - debug (g, "check_for_filesystem_on: %s %d %d (%s)", - device, is_block, is_partnum, - vfs_type ? vfs_type : "failed to get vfs type"); - - if (is_swap) { - free (vfs_type); - if (extend_fses (g) == -1) - return -1; - g->fses[g->nr_fses-1].is_swap = 1; - return 0; - } - - /* Try mounting the device. As above, ignore errors. */ - g->error_cb = NULL; - int r = guestfs_mount_ro (g, device, "/"); - if (r == -1 && vfs_type && STREQ (vfs_type, "ufs")) /* Hack for the *BSDs. */ - r = guestfs_mount_vfs (g, "ro,ufstype=ufs2", "ufs", device, "/"); - free (vfs_type); - g->error_cb = old_error_cb; - if (r == -1) - return 0; - - /* Do the rest of the checks. */ - r = check_filesystem (g, device, is_block, is_partnum); - - /* Unmount the filesystem. */ - if (guestfs_umount_all (g) == -1) - return -1; - - return r; -} - -/* is_block and is_partnum are just hints: is_block is true if the - * filesystem is a whole block device (eg. /dev/sda). is_partnum - * is > 0 if the filesystem is a direct partition, and in this case - * it is the partition number counting from 1 - * (eg. /dev/sda1 => is_partnum == 1). - */ -static int -check_filesystem (guestfs_h *g, const char *device, - int is_block, int is_partnum) -{ - if (extend_fses (g) == -1) - return -1; - - struct inspect_fs *fs = &g->fses[g->nr_fses-1]; - - fs->device = safe_strdup (g, device); - fs->is_mountable = 1; - - /* Optimize some of the tests by avoiding multiple tests of the same thing. */ - int is_dir_etc = guestfs_is_dir (g, "/etc") > 0; - int is_dir_bin = guestfs_is_dir (g, "/bin") > 0; - int is_dir_share = guestfs_is_dir (g, "/share") > 0; - - /* Grub /boot? */ - if (guestfs_is_file (g, "/grub/menu.lst") > 0 || - guestfs_is_file (g, "/grub/grub.conf") > 0) - fs->content = FS_CONTENT_LINUX_BOOT; - /* FreeBSD root? */ - else if (is_dir_etc && - is_dir_bin && - guestfs_is_file (g, "/etc/freebsd-update.conf") > 0 && - guestfs_is_file (g, "/etc/fstab") > 0) { - /* Ignore /dev/sda1 which is a shadow of the real root filesystem - * that is probably /dev/sda5 (see: - * http://www.freebsd.org/doc/handbook/disk-organization.html) - */ - if (match (g, device, re_first_partition)) - return 0; - - fs->is_root = 1; - fs->content = FS_CONTENT_FREEBSD_ROOT; - fs->format = OS_FORMAT_INSTALLED; - if (check_freebsd_root (g, fs) == -1) - return -1; - } - /* Linux root? */ - else if (is_dir_etc && - is_dir_bin && - guestfs_is_file (g, "/etc/fstab") > 0) { - fs->is_root = 1; - fs->content = FS_CONTENT_LINUX_ROOT; - fs->format = OS_FORMAT_INSTALLED; - if (check_linux_root (g, fs) == -1) - return -1; - } - /* Linux /usr/local? */ - else if (is_dir_etc && - is_dir_bin && - is_dir_share && - guestfs_exists (g, "/local") == 0 && - guestfs_is_file (g, "/etc/fstab") == 0) - fs->content = FS_CONTENT_LINUX_USR_LOCAL; - /* Linux /usr? */ - else if (is_dir_etc && - is_dir_bin && - is_dir_share && - guestfs_exists (g, "/local") > 0 && - guestfs_is_file (g, "/etc/fstab") == 0) - fs->content = FS_CONTENT_LINUX_USR; - /* Linux /var? */ - else if (guestfs_is_dir (g, "/log") > 0 && - guestfs_is_dir (g, "/run") > 0 && - guestfs_is_dir (g, "/spool") > 0) - fs->content = FS_CONTENT_LINUX_VAR; - /* Windows root? - * Note that if a Windows guest has multiple disks and applications - * are installed on those other disks, then those other disks will - * contain "/Program Files" and "/System Volume Information". Those - * would *not* be Windows root disks. (RHBZ#674130) - */ - else if (is_file_nocase (g, "/AUTOEXEC.BAT") > 0 || - is_dir_nocase (g, "/WINDOWS") > 0 || - is_dir_nocase (g, "/WIN32") > 0 || - is_dir_nocase (g, "/WINNT") > 0 || - is_file_nocase (g, "/boot.ini") > 0 || - is_file_nocase (g, "/ntldr") > 0) { - fs->is_root = 1; - fs->content = FS_CONTENT_WINDOWS_ROOT; - fs->format = OS_FORMAT_INSTALLED; - if (check_windows_root (g, fs) == -1) - return -1; - } - /* Windows volume with installed applications (but not root)? */ - else if (is_dir_nocase (g, "/System Volume Information") > 0 && - is_dir_nocase (g, "/Program Files") > 0) - fs->content = FS_CONTENT_WINDOWS_VOLUME_WITH_APPS; - /* Windows volume (but not root)? */ - else if (is_dir_nocase (g, "/System Volume Information") > 0) - fs->content = FS_CONTENT_WINDOWS_VOLUME; - /* Install CD/disk? Skip these checks if it's not a whole device - * (eg. CD) or the first partition (eg. bootable USB key). - */ - else if ((is_block || is_partnum == 1) && - (guestfs_is_file (g, "/isolinux/isolinux.cfg") > 0 || - guestfs_is_dir (g, "/EFI/BOOT") > 0 || - guestfs_is_file (g, "/images/install.img") > 0 || - guestfs_is_dir (g, "/.disk") > 0 || - guestfs_is_file (g, "/.discinfo") > 0 || - guestfs_is_file (g, "/i386/txtsetup.sif") > 0 || - guestfs_is_file (g, "/amd64/txtsetup.sif")) > 0) { - fs->is_root = 1; - fs->content = FS_CONTENT_INSTALLER; - fs->format = OS_FORMAT_INSTALLER; - if (check_installer_root (g, fs) == -1) - return -1; - } - - return 0; -} - -/* Set fs->product_name to the first line of the release file. */ -static int -parse_release_file (guestfs_h *g, struct inspect_fs *fs, - const char *release_filename) -{ - fs->product_name = first_line_of_file (g, release_filename); - if (fs->product_name == NULL) - return -1; - return 0; -} - -/* Parse generic MAJOR.MINOR from the fs->product_name string. */ -static int -parse_major_minor (guestfs_h *g, struct inspect_fs *fs) -{ - char *major, *minor; - - if (match2 (g, fs->product_name, re_major_minor, &major, &minor)) { - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) { - free (minor); - return -1; - } - fs->minor_version = parse_unsigned_int (g, minor); - free (minor); - if (fs->minor_version == -1) - return -1; - } - return 0; -} - -/* Ubuntu has /etc/lsb-release containing: - * DISTRIB_ID=Ubuntu # Distro - * DISTRIB_RELEASE=10.04 # Version - * DISTRIB_CODENAME=lucid - * DISTRIB_DESCRIPTION="Ubuntu 10.04.1 LTS" # Product name - * - * [Ubuntu-derived ...] Linux Mint was found to have this: - * DISTRIB_ID=LinuxMint - * DISTRIB_RELEASE=10 - * DISTRIB_CODENAME=julia - * DISTRIB_DESCRIPTION="Linux Mint 10 Julia" - * Linux Mint also has /etc/linuxmint/info with more information, - * but we can use the LSB file. - * - * Mandriva has: - * LSB_VERSION=lsb-4.0-amd64:lsb-4.0-noarch - * DISTRIB_ID=MandrivaLinux - * DISTRIB_RELEASE=2010.1 - * DISTRIB_CODENAME=Henry_Farman - * DISTRIB_DESCRIPTION="Mandriva Linux 2010.1" - * Mandriva also has a normal release file called /etc/mandriva-release. - */ -static int -parse_lsb_release (guestfs_h *g, struct inspect_fs *fs) -{ - const char *filename = "/etc/lsb-release"; - int64_t size; - char **lines; - size_t i; - int r = 0; - - /* Don't trust guestfs_head_n not to break with very large files. - * Check the file size is something reasonable first. - */ - size = guestfs_filesize (g, filename); - if (size == -1) - /* guestfs_filesize failed and has already set error in handle */ - return -1; - if (size > MAX_SMALL_FILE_SIZE) { - error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), - filename, size); - return -1; - } - - lines = guestfs_head_n (g, 10, filename); - if (lines == NULL) - return -1; - - for (i = 0; lines[i] != NULL; ++i) { - if (fs->distro == 0 && - STREQ (lines[i], "DISTRIB_ID=Ubuntu")) { - fs->distro = OS_DISTRO_UBUNTU; - r = 1; - } - else if (fs->distro == 0 && - STREQ (lines[i], "DISTRIB_ID=LinuxMint")) { - fs->distro = OS_DISTRO_LINUX_MINT; - r = 1; - } - else if (fs->distro == 0 && - STREQ (lines[i], "DISTRIB_ID=MandrivaLinux")) { - fs->distro = OS_DISTRO_MANDRIVA; - r = 1; - } - else if (STRPREFIX (lines[i], "DISTRIB_RELEASE=")) { - char *major, *minor; - if (match2 (g, &lines[i][16], re_major_minor, &major, &minor)) { - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) { - free (minor); - guestfs___free_string_list (lines); - return -1; - } - fs->minor_version = parse_unsigned_int (g, minor); - free (minor); - if (fs->minor_version == -1) { - guestfs___free_string_list (lines); - return -1; - } - } - } - else if (fs->product_name == NULL && - (STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=\"") || - STRPREFIX (lines[i], "DISTRIB_DESCRIPTION='"))) { - size_t len = strlen (lines[i]) - 21 - 1; - fs->product_name = safe_strndup (g, &lines[i][21], len); - r = 1; - } - else if (fs->product_name == NULL && - STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=")) { - size_t len = strlen (lines[i]) - 20; - fs->product_name = safe_strndup (g, &lines[i][20], len); - r = 1; - } - } - - guestfs___free_string_list (lines); - return r; -} - -/* The currently mounted device is known to be a Linux root. Try to - * determine from this the distro, version, etc. Also parse - * /etc/fstab to determine the arrangement of mountpoints and - * associated devices. - */ -static int -check_linux_root (guestfs_h *g, struct inspect_fs *fs) -{ - int r; - - fs->type = OS_TYPE_LINUX; - - if (guestfs_exists (g, "/etc/lsb-release") > 0) { - r = parse_lsb_release (g, fs); - if (r == -1) /* error */ - return -1; - if (r == 1) /* ok - detected the release from this file */ - goto skip_release_checks; - } - - if (guestfs_exists (g, "/etc/redhat-release") > 0) { - fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */ - - if (parse_release_file (g, fs, "/etc/redhat-release") == -1) - return -1; - - char *major, *minor; - if ((major = match1 (g, fs->product_name, re_fedora)) != NULL) { - fs->distro = OS_DISTRO_FEDORA; - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) - return -1; - } - else if (match2 (g, fs->product_name, re_rhel_old, &major, &minor) || - match2 (g, fs->product_name, re_rhel, &major, &minor)) { - fs->distro = OS_DISTRO_RHEL; - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) { - free (minor); - return -1; - } - fs->minor_version = parse_unsigned_int (g, minor); - free (minor); - if (fs->minor_version == -1) - return -1; - } - else if ((major = match1 (g, fs->product_name, re_rhel_no_minor)) != NULL) { - fs->distro = OS_DISTRO_RHEL; - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) - return -1; - fs->minor_version = 0; - } - } - else if (guestfs_exists (g, "/etc/debian_version") > 0) { - fs->distro = OS_DISTRO_DEBIAN; - - if (parse_release_file (g, fs, "/etc/debian_version") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - else if (guestfs_exists (g, "/etc/pardus-release") > 0) { - fs->distro = OS_DISTRO_PARDUS; - - if (parse_release_file (g, fs, "/etc/pardus-release") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - else if (guestfs_exists (g, "/etc/arch-release") > 0) { - fs->distro = OS_DISTRO_ARCHLINUX; - - /* /etc/arch-release file is empty and I can't see a way to - * determine the actual release or product string. - */ - } - else if (guestfs_exists (g, "/etc/gentoo-release") > 0) { - fs->distro = OS_DISTRO_GENTOO; - - if (parse_release_file (g, fs, "/etc/gentoo-release") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - else if (guestfs_exists (g, "/etc/meego-release") > 0) { - fs->distro = OS_DISTRO_MEEGO; - - if (parse_release_file (g, fs, "/etc/meego-release") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - else if (guestfs_exists (g, "/etc/slackware-version") > 0) { - fs->distro = OS_DISTRO_SLACKWARE; - - if (parse_release_file (g, fs, "/etc/slackware-version") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - - skip_release_checks:; - - /* If distro test above was successful, work out the package format. */ - check_package_format (g, fs); - check_package_management (g, fs); - - /* Determine the architecture. */ - check_architecture (g, fs); - - /* We already know /etc/fstab exists because it's part of the test - * for Linux root above. We must now parse this file to determine - * which filesystems are used by the operating system and how they - * are mounted. - */ - if (inspect_with_augeas (g, fs, "/etc/fstab", check_fstab) == -1) - return -1; - - /* Determine hostname. */ - if (check_hostname_unix (g, fs) == -1) - return -1; - - return 0; -} - -/* The currently mounted device is known to be a FreeBSD root. */ -static int -check_freebsd_root (guestfs_h *g, struct inspect_fs *fs) -{ - fs->type = OS_TYPE_FREEBSD; - - /* FreeBSD has no authoritative version file. The version number is - * in /etc/motd, which the system administrator might edit, but - * we'll use that anyway. - */ - - if (guestfs_exists (g, "/etc/motd") > 0) { - if (parse_release_file (g, fs, "/etc/motd") == -1) - return -1; - - if (parse_major_minor (g, fs) == -1) - return -1; - } - - /* Determine the architecture. */ - check_architecture (g, fs); - - /* We already know /etc/fstab exists because it's part of the test above. */ - if (inspect_with_augeas (g, fs, "/etc/fstab", check_fstab) == -1) - return -1; - - /* Determine hostname. */ - if (check_hostname_unix (g, fs) == -1) - return -1; - - return 0; -} - -/* Debian/Ubuntu install disks are easy ... - * - * These files are added by the debian-cd program, and it is worth - * looking at the source code to determine exact values, in - * particular '/usr/share/debian-cd/tools/start_new_disc' - * - * XXX Architecture? We could parse it out of the product name - * string, but that seems quite hairy. We could look for the names - * of packages. Also note that some Debian install disks are - * multiarch. - */ -static int -check_debian_installer_root (guestfs_h *g, struct inspect_fs *fs) -{ - fs->product_name = first_line_of_file (g, "/.disk/info"); - if (!fs->product_name) - return -1; - - fs->type = OS_TYPE_LINUX; - if (STRPREFIX (fs->product_name, "Ubuntu")) - fs->distro = OS_DISTRO_UBUNTU; - else if (STRPREFIX (fs->product_name, "Debian")) - fs->distro = OS_DISTRO_DEBIAN; - - (void) parse_major_minor (g, fs); - - if (guestfs_is_file (g, "/.disk/cd_type") > 0) { - char *cd_type = first_line_of_file (g, "/.disk/cd_type"); - if (!cd_type) - return -1; - - if (STRPREFIX (cd_type, "dvd/single") || - STRPREFIX (cd_type, "full_cd/single")) { - fs->is_multipart_disk = 0; - fs->is_netinst_disk = 0; - } - else if (STRPREFIX (cd_type, "dvd") || - STRPREFIX (cd_type, "full_cd")) { - fs->is_multipart_disk = 1; - fs->is_netinst_disk = 0; - } - else if (STRPREFIX (cd_type, "not_complete")) { - fs->is_multipart_disk = 0; - fs->is_netinst_disk = 1; - } - - free (cd_type); - } - - return 0; -} - -/* Take string which must look like "key = value" and find the value. - * There may or may not be spaces before and after the equals sign. - * This function is used by both check_fedora_installer_root and - * check_w2k3_installer_root. - */ -static const char * -find_value (const char *kv) -{ - const char *p; - - p = strchr (kv, '='); - if (!p) - abort (); - - do { - ++p; - } while (c_isspace (*p)); - - return p; -} - -/* Fedora CDs and DVD (not netinst). The /.treeinfo file contains - * an initial section somewhat like this: - * - * [general] - * version = 14 - * arch = x86_64 - * family = Fedora - * variant = Fedora - * discnum = 1 - * totaldiscs = 1 - */ -static int -check_fedora_installer_root (guestfs_h *g, struct inspect_fs *fs) -{ - char *str; - const char *v; - int r; - int discnum = 0, totaldiscs = 0; - - fs->type = OS_TYPE_LINUX; - - r = first_egrep_of_file (g, "/.treeinfo", - "^family = Fedora$", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - fs->distro = OS_DISTRO_FEDORA; - free (str); - } - - r = first_egrep_of_file (g, "/.treeinfo", - "^family = Red Hat Enterprise Linux$", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - fs->distro = OS_DISTRO_RHEL; - free (str); - } - - /* XXX should do major.minor before this */ - r = first_egrep_of_file (g, "/.treeinfo", - "^version = [[:digit:]]+", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - v = find_value (str); - fs->major_version = parse_unsigned_int_ignore_trailing (g, v); - free (str); - if (fs->major_version == -1) - return -1; - } - - r = first_egrep_of_file (g, "/.treeinfo", - "^arch = [-_[:alnum:]]+$", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - v = find_value (str); - fs->arch = safe_strdup (g, v); - free (str); - } - - r = first_egrep_of_file (g, "/.treeinfo", - "^discnum = [[:digit:]]+$", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - v = find_value (str); - discnum = parse_unsigned_int (g, v); - free (str); - if (discnum == -1) - return -1; - } - - r = first_egrep_of_file (g, "/.treeinfo", - "^totaldiscs = [[:digit:]]+$", 0, &str); - if (r == -1) - return -1; - if (r > 0) { - v = find_value (str); - totaldiscs = parse_unsigned_int (g, v); - free (str); - if (totaldiscs == -1) - return -1; - } - - fs->is_multipart_disk = totaldiscs > 0; - /* and what about discnum? */ - - return 0; -} - -/* Linux with /isolinux/isolinux.cfg. - * - * This file is not easily parsable so we have to do our best. - * Look for the "menu title" line which contains: - * menu title Welcome to Fedora 14! # since at least Fedora 10 - * menu title Welcome to Red Hat Enterprise Linux 6.0! - */ -static int -check_isolinux_installer_root (guestfs_h *g, struct inspect_fs *fs) -{ - char *str; - int r; - - fs->type = OS_TYPE_LINUX; - - r = first_egrep_of_file (g, "/isolinux/isolinux.cfg", - "^menu title Welcome to Fedora [[:digit:]]+", - 0, &str); - if (r == -1) - return -1; - if (r > 0) { - fs->distro = OS_DISTRO_FEDORA; - fs->major_version = parse_unsigned_int_ignore_trailing (g, &str[29]); - free (str); - if (fs->major_version == -1) - return -1; - } - - /* XXX parse major.minor */ - r = first_egrep_of_file (g, "/isolinux/isolinux.cfg", - "^menu title Welcome to Red Hat Enterprise Linux [[:digit:]]+", - 0, &str); - if (r == -1) - return -1; - if (r > 0) { - fs->distro = OS_DISTRO_RHEL; - fs->major_version = parse_unsigned_int_ignore_trailing (g, &str[47]); - free (str); - if (fs->major_version == -1) - return -1; - } - - return 0; -} - -/* Windows 2003 and similar versions. - * - * NB: txtsetup file contains Windows \r\n line endings, which guestfs_grep - * does not remove. We have to remove them by hand here. - */ -static void -trim_cr (char *str) -{ - size_t n = strlen (str); - if (n > 0 && str[n-1] == '\r') - str[n-1] = '\0'; -} - -static void -trim_quot (char *str) -{ - size_t n = strlen (str); - if (n > 0 && str[n-1] == '"') - str[n-1] = '\0'; -} - -static int -check_w2k3_installer_root (guestfs_h *g, struct inspect_fs *fs, - const char *txtsetup) -{ - char *str; - const char *v; - int r; - - fs->type = OS_TYPE_WINDOWS; - fs->distro = OS_DISTRO_WINDOWS; - - r = first_egrep_of_file (g, txtsetup, - "^productname[[:space:]]*=[[:space:]]*\"", 1, &str); - if (r == -1) - return -1; - if (r > 0) { - trim_cr (str); - trim_quot (str); - v = find_value (str); - fs->product_name = safe_strdup (g, v+1); - free (str); - } - - r = first_egrep_of_file (g, txtsetup, - "^majorversion[[:space:]]*=[[:space:]]*[[:digit:]]+", - 1, &str); - if (r == -1) - return -1; - if (r > 0) { - trim_cr (str); - v = find_value (str); - fs->major_version = parse_unsigned_int_ignore_trailing (g, v); - free (str); - if (fs->major_version == -1) - return -1; - } - - r = first_egrep_of_file (g, txtsetup, - "^minorversion[[:space:]]*=[[:space:]]*[[:digit:]]+", - 1, &str); - if (r == -1) - return -1; - if (r > 0) { - trim_cr (str); - v = find_value (str); - fs->minor_version = parse_unsigned_int_ignore_trailing (g, v); - free (str); - if (fs->minor_version == -1) - return -1; - } - - /* This is the windows systemroot that would be chosen on - * installation by default, although not necessarily the one that - * the user will finally choose. - */ - r = first_egrep_of_file (g, txtsetup, "^defaultpath[[:space:]]*=[[:space:]]*", - 1, &str); - if (r == -1) - return -1; - if (r > 0) { - trim_cr (str); - v = find_value (str); - fs->windows_systemroot = safe_strdup (g, v); - free (str); - } - - return 0; -} - -/* The currently mounted device is very likely to be an installer. */ -static int -check_installer_root (guestfs_h *g, struct inspect_fs *fs) -{ - /* The presence of certain files indicates a live CD. - * - * XXX Fedora netinst contains a ~120MB squashfs called - * /images/install.img. However this is not a live CD (unlike the - * Fedora live CDs which contain the same, but larger file). We - * need to unpack this and look inside to tell the difference. - */ - if (guestfs_is_file (g, "/casper/filesystem.squashfs") > 0) - fs->is_live_disk = 1; - - /* Debian/Ubuntu. */ - if (guestfs_is_file (g, "/.disk/info") > 0) { - if (check_debian_installer_root (g, fs) == -1) - return -1; - } - - /* Fedora CDs and DVD (not netinst). */ - else if (guestfs_is_file (g, "/.treeinfo") > 0) { - if (check_fedora_installer_root (g, fs) == -1) - return -1; - } - - /* Linux with /isolinux/isolinux.cfg. */ - else if (guestfs_is_file (g, "/isolinux/isolinux.cfg") > 0) { - if (check_isolinux_installer_root (g, fs) == -1) - return -1; - } - - /* Windows 2003 64 bit */ - else if (guestfs_is_file (g, "/amd64/txtsetup.sif") > 0) { - fs->arch = safe_strdup (g, "x86_64"); - if (check_w2k3_installer_root (g, fs, "/amd64/txtsetup.sif") == -1) - return -1; - } - - /* Windows 2003 32 bit */ - else if (guestfs_is_file (g, "/i386/txtsetup.sif") > 0) { - fs->arch = safe_strdup (g, "i386"); - if (check_w2k3_installer_root (g, fs, "/i386/txtsetup.sif") == -1) - return -1; - } - - return 0; -} - -static void -check_architecture (guestfs_h *g, struct inspect_fs *fs) -{ - const char *binaries[] = - { "/bin/bash", "/bin/ls", "/bin/echo", "/bin/rm", "/bin/sh" }; - size_t i; - - for (i = 0; i < sizeof binaries / sizeof binaries[0]; ++i) { - if (guestfs_is_file (g, binaries[i]) > 0) { - /* Ignore errors from file_architecture call. */ - guestfs_error_handler_cb old_error_cb = g->error_cb; - g->error_cb = NULL; - char *arch = guestfs_file_architecture (g, binaries[i]); - g->error_cb = old_error_cb; - - if (arch) { - /* String will be owned by handle, freed by - * guestfs___free_inspect_info. - */ - fs->arch = arch; - break; - } - } - } -} - -/* Try several methods to determine the hostname from a Linux or - * FreeBSD guest. Note that type and distro have been set, so we can - * use that information to direct the search. - */ -static int -check_hostname_unix (guestfs_h *g, struct inspect_fs *fs) -{ - switch (fs->type) { - case OS_TYPE_LINUX: - /* Red Hat-derived would be in /etc/sysconfig/network, and - * Debian-derived in the file /etc/hostname. Very old Debian and - * SUSE use /etc/HOSTNAME. It's best to just look for each of - * these files in turn, rather than try anything clever based on - * distro. - */ - if (guestfs_is_file (g, "/etc/HOSTNAME")) { - fs->hostname = first_line_of_file (g, "/etc/HOSTNAME"); - if (fs->hostname == NULL) - return -1; - } - else if (guestfs_is_file (g, "/etc/hostname")) { - fs->hostname = first_line_of_file (g, "/etc/hostname"); - if (fs->hostname == NULL) - return -1; - } - else if (guestfs_is_file (g, "/etc/sysconfig/network")) { - if (inspect_with_augeas (g, fs, "/etc/sysconfig/network", - check_hostname_redhat) == -1) - return -1; - } - break; - - case OS_TYPE_FREEBSD: - /* /etc/rc.conf contains the hostname, but there is no Augeas lens - * for this file. - */ - if (guestfs_is_file (g, "/etc/rc.conf")) { - if (check_hostname_freebsd (g, fs) == -1) - return -1; - } - break; - - case OS_TYPE_WINDOWS: /* not here, see check_windows_system_registry */ - case OS_TYPE_UNKNOWN: - default: - /* nothing, keep GCC warnings happy */; - } - - return 0; -} - -/* Parse the hostname from /etc/sysconfig/network. This must be called - * from the inspect_with_augeas wrapper. - */ -static int -check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs) -{ - char *hostname; - - hostname = guestfs_aug_get (g, "/files/etc/sysconfig/network/HOSTNAME"); - if (!hostname) - return -1; - - fs->hostname = hostname; /* freed by guestfs___free_inspect_info */ - return 0; -} - -/* Parse the hostname from /etc/rc.conf. On FreeBSD this file - * contains comments, blank lines and: - * hostname="freebsd8.example.com" - * ifconfig_re0="DHCP" - * keymap="uk.iso" - * sshd_enable="YES" - */ -static int -check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs) -{ - const char *filename = "/etc/rc.conf"; - int64_t size; - char **lines; - size_t i; - - /* Don't trust guestfs_read_lines not to break with very large files. - * Check the file size is something reasonable first. - */ - size = guestfs_filesize (g, filename); - if (size == -1) - /* guestfs_filesize failed and has already set error in handle */ - return -1; - if (size > MAX_SMALL_FILE_SIZE) { - error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), - filename, size); - return -1; - } - - lines = guestfs_read_lines (g, filename); - if (lines == NULL) - return -1; - - for (i = 0; lines[i] != NULL; ++i) { - if (STRPREFIX (lines[i], "hostname=\"") || - STRPREFIX (lines[i], "hostname='")) { - size_t len = strlen (lines[i]) - 10 - 1; - fs->hostname = safe_strndup (g, &lines[i][10], len); - break; - } else if (STRPREFIX (lines[i], "hostname=")) { - size_t len = strlen (lines[i]) - 9; - fs->hostname = safe_strndup (g, &lines[i][9], len); - break; - } - } - - guestfs___free_string_list (lines); - return 0; -} - -static int -check_fstab (guestfs_h *g, struct inspect_fs *fs) -{ - char **lines = guestfs_aug_ls (g, "/files/etc/fstab"); - if (lines == NULL) - return -1; - - if (lines[0] == NULL) { - error (g, _("could not parse /etc/fstab or empty file")); - guestfs___free_string_list (lines); - return -1; - } - - size_t i; - char augpath[256]; - for (i = 0; lines[i] != NULL; ++i) { - /* Ignore comments. Only care about sequence lines which - * match m{/\d+$}. - */ - if (match (g, lines[i], re_aug_seq)) { - snprintf (augpath, sizeof augpath, "%s/spec", lines[i]); - char *spec = guestfs_aug_get (g, augpath); - if (spec == NULL) { - guestfs___free_string_list (lines); - return -1; - } - - snprintf (augpath, sizeof augpath, "%s/file", lines[i]); - char *mp = guestfs_aug_get (g, augpath); - if (mp == NULL) { - guestfs___free_string_list (lines); - free (spec); - return -1; - } - - int r = add_fstab_entry (g, fs, spec, mp); - free (spec); - free (mp); - - if (r == -1) { - guestfs___free_string_list (lines); - return -1; - } - } - } - - guestfs___free_string_list (lines); - return 0; -} - -/* Add a filesystem and possibly a mountpoint entry for - * the root filesystem 'fs'. - * - * 'spec' is the fstab spec field, which might be a device name or a - * pseudodevice or 'UUID=...' or 'LABEL=...'. - * - * 'mp' is the mount point, which could also be 'swap' or 'none'. - */ -static int -add_fstab_entry (guestfs_h *g, struct inspect_fs *fs, - const char *spec, const char *mp) -{ - /* Ignore certain mountpoints. */ - if (STRPREFIX (mp, "/dev/") || - STREQ (mp, "/dev") || - STRPREFIX (mp, "/media/") || - STRPREFIX (mp, "/proc/") || - STREQ (mp, "/proc") || - STRPREFIX (mp, "/selinux/") || - STREQ (mp, "/selinux") || - STRPREFIX (mp, "/sys/") || - STREQ (mp, "/sys")) - return 0; - - /* Ignore /dev/fd (floppy disks) (RHBZ#642929) and CD-ROM drives. */ - if ((STRPREFIX (spec, "/dev/fd") && c_isdigit (spec[7])) || - STREQ (spec, "/dev/floppy") || - STREQ (spec, "/dev/cdrom")) - return 0; - - /* Resolve UUID= and LABEL= to the actual device. */ - char *device = NULL; - if (STRPREFIX (spec, "UUID=")) - device = guestfs_findfs_uuid (g, &spec[5]); - else if (STRPREFIX (spec, "LABEL=")) - device = guestfs_findfs_label (g, &spec[6]); - /* Ignore "/.swap" (Pardus) and pseudo-devices like "tmpfs". */ - else if (STRPREFIX (spec, "/dev/")) - /* Resolve guest block device names. */ - device = resolve_fstab_device (g, spec); - - /* If we haven't resolved the device successfully by this point, - * we don't care, just ignore it. - */ - if (device == NULL) - return 0; - - char *mountpoint = safe_strdup (g, mp); - - /* Add this to the fstab entry in 'fs'. - * Note these are further filtered by guestfs_inspect_get_mountpoints - * and guestfs_inspect_get_filesystems. - */ - size_t n = fs->nr_fstab + 1; - struct inspect_fstab_entry *p; - - p = realloc (fs->fstab, n * sizeof (struct inspect_fstab_entry)); - if (p == NULL) { - perrorf (g, "realloc"); - free (device); - free (mountpoint); - return -1; - } - - fs->fstab = p; - fs->nr_fstab = n; - - /* These are owned by the handle and freed by guestfs___free_inspect_info. */ - fs->fstab[n-1].device = device; - fs->fstab[n-1].mountpoint = mountpoint; - - debug (g, "fstab: device=%s mountpoint=%s", device, mountpoint); - - return 0; -} - -/* Resolve block device name to the libguestfs device name, eg. - * /dev/xvdb1 => /dev/vdb1; and /dev/mapper/VG-LV => /dev/VG/LV. This - * assumes that disks were added in the same order as they appear to - * the real VM, which is a reasonable assumption to make. Return - * anything we don't recognize unchanged. - */ -static char * -resolve_fstab_device (guestfs_h *g, const char *spec) -{ - char *a1; - char *device = NULL; - char *bsddisk, *bsdslice, *bsdpart; - - if (STRPREFIX (spec, "/dev/mapper/")) { - /* LVM2 does some strange munging on /dev/mapper paths for VGs and - * LVs which contain '-' character: - * - * > lvcreate LV--test VG--test 32 - * > debug ls /dev/mapper - * VG----test-LV----test - * - * This makes it impossible to reverse those paths directly, so - * we have implemented lvm_canonical_lv_name in the daemon. - */ - device = guestfs_lvm_canonical_lv_name (g, spec); - } - else if ((a1 = match1 (g, spec, re_xdev)) != NULL) { - char **devices = guestfs_list_devices (g); - if (devices == NULL) - return NULL; - - size_t count; - for (count = 0; devices[count] != NULL; count++) - ; - - size_t i = a1[0] - 'a'; /* a1[0] is always [a-z] because of regex. */ - if (i < count) { - size_t len = strlen (devices[i]) + strlen (a1) + 16; - device = safe_malloc (g, len); - snprintf (device, len, "%s%s", devices[i], &a1[1]); - } - - free (a1); - guestfs___free_string_list (devices); - } - else if (match3 (g, spec, re_freebsd, &bsddisk, &bsdslice, &bsdpart)) { - /* FreeBSD disks are organized quite differently. See: - * http://www.freebsd.org/doc/handbook/disk-organization.html - * FreeBSD "partitions" are exposed as quasi-extended partitions - * numbered from 5 in Linux. I have no idea what happens when you - * have multiple "slices" (the FreeBSD term for MBR partitions). - */ - int disk = parse_unsigned_int (g, bsddisk); - int slice = parse_unsigned_int (g, bsdslice); - int part = bsdpart[0] - 'a' /* counting from 0 */; - free (bsddisk); - free (bsdslice); - free (bsdpart); - - if (disk == -1 || disk > 26 || - slice <= 0 || slice > 1 /* > 4 .. see comment above */ || - part < 0 || part >= 26) - goto out; - - device = safe_asprintf (g, "/dev/sd%c%d", disk + 'a', part + 5); - } - - out: - /* Didn't match device pattern, return original spec unchanged. */ - if (device == NULL) - device = safe_strdup (g, spec); - - return device; -} - -/* XXX Handling of boot.ini in the Perl version was pretty broken. It - * essentially didn't do anything for modern Windows guests. - * Therefore I've omitted all that code. - */ -static int -check_windows_root (guestfs_h *g, struct inspect_fs *fs) -{ - fs->type = OS_TYPE_WINDOWS; - fs->distro = OS_DISTRO_WINDOWS; - - /* Try to find Windows systemroot using some common locations. */ - const char *systemroots[] = - { "/windows", "/winnt", "/win32", "/win" }; - size_t i; - char *systemroot = NULL; - for (i = 0; - systemroot == NULL && i < sizeof systemroots / sizeof systemroots[0]; - ++i) { - systemroot = case_sensitive_path_silently (g, systemroots[i]); - } - - if (!systemroot) { - error (g, _("cannot resolve Windows %%SYSTEMROOT%%")); - return -1; - } - - debug (g, "windows %%SYSTEMROOT%% = %s", systemroot); - - /* Freed by guestfs___free_inspect_info. */ - fs->windows_systemroot = systemroot; - - if (check_windows_arch (g, fs) == -1) - return -1; - - /* Product name and version. */ - if (check_windows_software_registry (g, fs) == -1) - return -1; - - check_package_format (g, fs); - check_package_management (g, fs); - - /* Hostname. */ - if (check_windows_system_registry (g, fs) == -1) - return -1; - - return 0; -} - -static int -check_windows_arch (guestfs_h *g, struct inspect_fs *fs) -{ - size_t len = strlen (fs->windows_systemroot) + 32; - char cmd_exe[len]; - snprintf (cmd_exe, len, "%s/system32/cmd.exe", fs->windows_systemroot); - - char *cmd_exe_path = case_sensitive_path_silently (g, cmd_exe); - if (!cmd_exe_path) - return 0; - - char *arch = guestfs_file_architecture (g, cmd_exe_path); - free (cmd_exe_path); - - if (arch) - fs->arch = arch; /* freed by guestfs___free_inspect_info */ - - return 0; -} - -/* At the moment, pull just the ProductName and version numbers from - * the registry. In future there is a case for making many more - * registry fields available to callers. - */ -static int -check_windows_software_registry (guestfs_h *g, struct inspect_fs *fs) -{ - const char *basename = "software"; - char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; - snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", - g->tmpdir, basename); - - size_t len = strlen (fs->windows_systemroot) + 64; - char software[len]; - snprintf (software, len, "%s/system32/config/software", - fs->windows_systemroot); - - char *software_path = case_sensitive_path_silently (g, software); - if (!software_path) - /* If the software hive doesn't exist, just accept that we cannot - * find product_name etc. - */ - return 0; - - int ret = -1; - hive_h *h = NULL; - hive_value_h *values = NULL; - - if (download_to_tmp (g, software_path, basename, MAX_REGISTRY_SIZE) == -1) - goto out; - - h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); - if (h == NULL) { - perrorf (g, "hivex_open"); - goto out; - } - - hive_node_h node = hivex_root (h); - const char *hivepath[] = - { "Microsoft", "Windows NT", "CurrentVersion" }; - size_t i; - for (i = 0; - node != 0 && i < sizeof hivepath / sizeof hivepath[0]; - ++i) { - node = hivex_node_get_child (h, node, hivepath[i]); - } - - if (node == 0) { - perrorf (g, "hivex: cannot locate HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"); - goto out; - } - - values = hivex_node_values (h, node); - - for (i = 0; values[i] != 0; ++i) { - char *key = hivex_value_key (h, values[i]); - if (key == NULL) { - perrorf (g, "hivex_value_key"); - goto out; - } - - if (STRCASEEQ (key, "ProductName")) { - fs->product_name = hivex_value_string (h, values[i]); - if (!fs->product_name) { - perrorf (g, "hivex_value_string"); - free (key); - goto out; - } - } - else if (STRCASEEQ (key, "CurrentVersion")) { - char *version = hivex_value_string (h, values[i]); - if (!version) { - perrorf (g, "hivex_value_string"); - free (key); - goto out; - } - char *major, *minor; - if (match2 (g, version, re_windows_version, &major, &minor)) { - fs->major_version = parse_unsigned_int (g, major); - free (major); - if (fs->major_version == -1) { - free (minor); - free (key); - free (version); - goto out; - } - fs->minor_version = parse_unsigned_int (g, minor); - free (minor); - if (fs->minor_version == -1) { - free (key); - free (version); - goto out; - } - } - - free (version); - } - else if (STRCASEEQ (key, "InstallationType")) { - fs->product_variant = hivex_value_string (h, values[i]); - if (!fs->product_variant) { - perrorf (g, "hivex_value_string"); - free (key); - goto out; - } - } - - free (key); - } - - ret = 0; - - out: - if (h) hivex_close (h); - free (values); - free (software_path); - - return ret; -} - -static int -check_windows_system_registry (guestfs_h *g, struct inspect_fs *fs) -{ - const char *basename = "system"; - char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; - snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", - g->tmpdir, basename); - - size_t len = strlen (fs->windows_systemroot) + 64; - char system[len]; - snprintf (system, len, "%s/system32/config/system", - fs->windows_systemroot); - - char *system_path = case_sensitive_path_silently (g, system); - if (!system_path) - /* If the system hive doesn't exist, just accept that we cannot - * find hostname etc. - */ - return 0; - - int ret = -1; - hive_h *h = NULL; - hive_node_h root, node; - hive_value_h value, *values = NULL; - int32_t dword; - size_t i, count; - - if (download_to_tmp (g, system_path, basename, MAX_REGISTRY_SIZE) == -1) - goto out; - - h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); - if (h == NULL) { - perrorf (g, "hivex_open"); - goto out; - } - - root = hivex_root (h); - if (root == 0) { - perrorf (g, "hivex_root"); - goto out; - } - - /* Get the CurrentControlSet. */ - errno = 0; - node = hivex_node_get_child (h, root, "Select"); - if (node == 0) { - if (errno != 0) - perrorf (g, "hivex_node_get_child"); - else - error (g, "hivex: could not locate HKLM\\SYSTEM\\Select"); - goto out; - } - - errno = 0; - value = hivex_node_get_value (h, node, "Current"); - if (value == 0) { - if (errno != 0) - perrorf (g, "hivex_node_get_value"); - else - error (g, "hivex: HKLM\\System\\Select Default entry not found."); - goto out; - } - - /* XXX Should check the type. */ - dword = hivex_value_dword (h, value); - fs->windows_current_control_set = safe_asprintf (g, "ControlSet%03d", dword); - - /* Get the drive mappings. - * This page explains the contents of HKLM\System\MountedDevices: - * http://www.goodells.net/multiboot/partsigs.shtml - */ - errno = 0; - node = hivex_node_get_child (h, root, "MountedDevices"); - if (node == 0) { - if (errno != 0) - perrorf (g, "hivex_node_get_child"); - else - error (g, "hivex: could not locate HKLM\\SYSTEM\\MountedDevices"); - goto out; - } - - values = hivex_node_values (h, node); - - /* Count how many DOS drive letter mappings there are. This doesn't - * ignore removable devices, so it overestimates, but that doesn't - * matter because it just means we'll allocate a few bytes extra. - */ - for (i = count = 0; values[i] != 0; ++i) { - char *key = hivex_value_key (h, values[i]); - if (key == NULL) { - perrorf (g, "hivex_value_key"); - goto out; - } - if (STRCASEEQLEN (key, "\\DosDevices\\", 12) && - c_isalpha (key[12]) && key[13] == ':') - count++; - free (key); - } - - fs->drive_mappings = calloc (2*count + 1, sizeof (char *)); - if (fs->drive_mappings == NULL) { - perrorf (g, "calloc"); - goto out; - } - - for (i = count = 0; values[i] != 0; ++i) { - char *key = hivex_value_key (h, values[i]); - if (key == NULL) { - perrorf (g, "hivex_value_key"); - goto out; - } - if (STRCASEEQLEN (key, "\\DosDevices\\", 12) && - c_isalpha (key[12]) && key[13] == ':') { - /* Get the binary value. Is it a fixed disk? */ - char *blob, *device; - size_t len; - hive_type type; - - blob = hivex_value_value (h, values[i], &type, &len); - if (blob != NULL && type == 3 && len == 12) { - /* Try to map the blob to a known disk and partition. */ - device = map_registry_disk_blob (g, blob); - if (device != NULL) { - fs->drive_mappings[count++] = safe_strndup (g, &key[12], 1); - fs->drive_mappings[count++] = device; - } - } - free (blob); - } - free (key); - } - - /* Get the hostname. */ - const char *hivepath[] = - { fs->windows_current_control_set, "Services", "Tcpip", "Parameters" }; - for (node = root, i = 0; - node != 0 && i < sizeof hivepath / sizeof hivepath[0]; - ++i) { - node = hivex_node_get_child (h, node, hivepath[i]); - } - - if (node == 0) { - perrorf (g, "hivex: cannot locate HKLM\\SYSTEM\\%s\\Services\\Tcpip\\Parameters", - fs->windows_current_control_set); - goto out; - } - - free (values); - values = hivex_node_values (h, node); - - for (i = 0; values[i] != 0; ++i) { - char *key = hivex_value_key (h, values[i]); - if (key == NULL) { - perrorf (g, "hivex_value_key"); - goto out; - } - - if (STRCASEEQ (key, "Hostname")) { - fs->hostname = hivex_value_string (h, values[i]); - if (!fs->hostname) { - perrorf (g, "hivex_value_string"); - free (key); - goto out; - } - } - /* many other interesting fields here ... */ - - free (key); - } - - ret = 0; - - out: - if (h) hivex_close (h); - free (values); - free (system_path); - - return ret; -} - -/* Windows Registry HKLM\SYSTEM\MountedDevices uses a blob of data - * to store partitions. This blob is described here: - * http://www.goodells.net/multiboot/partsigs.shtml - * The following function maps this blob to a libguestfs partition - * name, if possible. - */ -static char * -map_registry_disk_blob (guestfs_h *g, const char *blob) -{ - char **devices = NULL; - struct guestfs_partition_list *partitions = NULL; - char *diskid; - size_t i, j, len; - char *ret = NULL; - uint64_t part_offset; - - /* First 4 bytes are the disk ID. Search all devices to find the - * disk with this disk ID. - */ - devices = guestfs_list_devices (g); - if (devices == NULL) - goto out; - - for (i = 0; devices[i] != NULL; ++i) { - /* Read the disk ID. */ - diskid = guestfs_pread_device (g, devices[i], 4, 0x01b8, &len); - if (diskid == NULL) - continue; - if (len < 4) { - free (diskid); - continue; - } - if (memcmp (diskid, blob, 4) == 0) { /* found it */ - free (diskid); - goto found_disk; - } - free (diskid); - } - goto out; - - found_disk: - /* Next 8 bytes are the offset of the partition in bytes(!) given as - * a 64 bit little endian number. Luckily it's easy to get the - * partition byte offset from guestfs_part_list. - */ - part_offset = le64toh (* (uint64_t *) &blob[4]); - - partitions = guestfs_part_list (g, devices[i]); - if (partitions == NULL) - goto out; - - for (j = 0; j < partitions->len; ++j) { - if (partitions->val[j].part_start == part_offset) /* found it */ - goto found_partition; - } - goto out; - - found_partition: - /* Construct the full device name. */ - ret = safe_asprintf (g, "%s%d", devices[i], partitions->val[j].part_num); - - out: - if (devices) - guestfs___free_string_list (devices); - if (partitions) - guestfs_free_partition_list (partitions); - return ret; -} - -static char * -case_sensitive_path_silently (guestfs_h *g, const char *path) -{ - guestfs_error_handler_cb old_error_cb = g->error_cb; - g->error_cb = NULL; - char *ret = guestfs_case_sensitive_path (g, path); - g->error_cb = old_error_cb; - return ret; -} - -static int -is_file_nocase (guestfs_h *g, const char *path) -{ - char *p; - int r; - - p = case_sensitive_path_silently (g, path); - if (!p) - return 0; - r = guestfs_is_file (g, p); - free (p); - return r > 0; -} - -static int -is_dir_nocase (guestfs_h *g, const char *path) -{ - char *p; - int r; - - p = case_sensitive_path_silently (g, path); - if (!p) - return 0; - r = guestfs_is_dir (g, p); - free (p); - return r > 0; -} - -static int -extend_fses (guestfs_h *g) -{ - size_t n = g->nr_fses + 1; - struct inspect_fs *p; - - p = realloc (g->fses, n * sizeof (struct inspect_fs)); - if (p == NULL) { - perrorf (g, "realloc"); - return -1; - } - - g->fses = p; - g->nr_fses = n; - - memset (&g->fses[n-1], 0, sizeof (struct inspect_fs)); - - return 0; -} - -/* Parse small, unsigned ints, as used in version numbers. */ -static int -parse_unsigned_int (guestfs_h *g, const char *str) -{ - long ret; - int r = xstrtol (str, NULL, 10, &ret, ""); - if (r != LONGINT_OK) { - error (g, _("could not parse integer in version number: %s"), str); - return -1; - } - return ret; -} - -/* Like parse_unsigned_int, but ignore trailing stuff. */ -static int -parse_unsigned_int_ignore_trailing (guestfs_h *g, const char *str) -{ - long ret; - int r = xstrtol (str, NULL, 10, &ret, NULL); - if (r != LONGINT_OK) { - error (g, _("could not parse integer in version number: %s"), str); - return -1; - } - return ret; -} - -/* At the moment, package format and package management is just a - * simple function of the distro and major_version fields, so these - * can never return an error. We might be cleverer in future. - */ -static void -check_package_format (guestfs_h *g, struct inspect_fs *fs) -{ - switch (fs->distro) { - case OS_DISTRO_FEDORA: - case OS_DISTRO_MEEGO: - case OS_DISTRO_REDHAT_BASED: - case OS_DISTRO_RHEL: - case OS_DISTRO_MANDRIVA: - fs->package_format = OS_PACKAGE_FORMAT_RPM; - break; - - case OS_DISTRO_DEBIAN: - case OS_DISTRO_UBUNTU: - case OS_DISTRO_LINUX_MINT: - fs->package_format = OS_PACKAGE_FORMAT_DEB; - break; - - case OS_DISTRO_ARCHLINUX: - fs->package_format = OS_PACKAGE_FORMAT_PACMAN; - break; - case OS_DISTRO_GENTOO: - fs->package_format = OS_PACKAGE_FORMAT_EBUILD; - break; - case OS_DISTRO_PARDUS: - fs->package_format = OS_PACKAGE_FORMAT_PISI; - break; - - case OS_DISTRO_SLACKWARE: - case OS_DISTRO_WINDOWS: - case OS_DISTRO_UNKNOWN: - default: - fs->package_format = OS_PACKAGE_FORMAT_UNKNOWN; - break; - } -} - -static void -check_package_management (guestfs_h *g, struct inspect_fs *fs) -{ - switch (fs->distro) { - case OS_DISTRO_FEDORA: - case OS_DISTRO_MEEGO: - fs->package_management = OS_PACKAGE_MANAGEMENT_YUM; - break; - - case OS_DISTRO_REDHAT_BASED: - case OS_DISTRO_RHEL: - if (fs->major_version >= 5) - fs->package_management = OS_PACKAGE_MANAGEMENT_YUM; - else - fs->package_management = OS_PACKAGE_MANAGEMENT_UP2DATE; - break; - - case OS_DISTRO_DEBIAN: - case OS_DISTRO_UBUNTU: - case OS_DISTRO_LINUX_MINT: - fs->package_management = OS_PACKAGE_MANAGEMENT_APT; - break; - - case OS_DISTRO_ARCHLINUX: - fs->package_management = OS_PACKAGE_MANAGEMENT_PACMAN; - break; - case OS_DISTRO_GENTOO: - fs->package_management = OS_PACKAGE_MANAGEMENT_PORTAGE; - break; - case OS_DISTRO_PARDUS: - fs->package_management = OS_PACKAGE_MANAGEMENT_PISI; - break; - case OS_DISTRO_MANDRIVA: - fs->package_management = OS_PACKAGE_MANAGEMENT_URPMI; - break; - - case OS_DISTRO_SLACKWARE: - case OS_DISTRO_WINDOWS: - case OS_DISTRO_UNKNOWN: - default: - fs->package_management = OS_PACKAGE_MANAGEMENT_UNKNOWN; - break; + return NULL; + } } -} + guestfs___free_string_list (devices); -static struct inspect_fs * -search_for_root (guestfs_h *g, const char *root) -{ - if (g->nr_fses == 0) { - error (g, _("no inspection data: call guestfs_inspect_os first")); + /* Look at all partitions. */ + char **partitions; + partitions = guestfs_list_partitions (g); + if (partitions == NULL) { + guestfs___free_inspect_info (g); return NULL; } - size_t i; - struct inspect_fs *fs; - for (i = 0; i < g->nr_fses; ++i) { - fs = &g->fses[i]; - if (fs->is_root && STREQ (root, fs->device)) - return fs; + for (i = 0; partitions[i] != NULL; ++i) { + if (guestfs___check_for_filesystem_on (g, partitions[i], 0, i+1) == -1) { + guestfs___free_string_list (partitions); + guestfs___free_inspect_info (g); + return NULL; + } } + guestfs___free_string_list (partitions); - error (g, _("%s: root device not found: only call this function with a root device previously returned by guestfs_inspect_os"), - root); - return NULL; + /* Look at all LVs. */ + if (guestfs___feature_available (g, "lvm2")) { + char **lvs; + lvs = guestfs_lvs (g); + if (lvs == NULL) { + guestfs___free_inspect_info (g); + return NULL; + } + + for (i = 0; lvs[i] != NULL; ++i) { + if (guestfs___check_for_filesystem_on (g, lvs[i], 0, 0) == -1) { + guestfs___free_string_list (lvs); + guestfs___free_inspect_info (g); + return NULL; + } + } + guestfs___free_string_list (lvs); + } + + /* At this point we have, in the handle, a list of all filesystems + * found and data about each one. Now we assemble the list of + * filesystems which are root devices and return that to the user. + * Fall through to guestfs__inspect_get_roots to do that. + */ + char **ret = guestfs__inspect_get_roots (g); + if (ret == NULL) + guestfs___free_inspect_info (g); + return ret; } char ** @@ -2069,7 +159,7 @@ guestfs__inspect_get_roots (guestfs_h *g) char * guestfs__inspect_get_type (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2087,7 +177,7 @@ guestfs__inspect_get_type (guestfs_h *g, const char *root) char * guestfs__inspect_get_arch (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2097,7 +187,7 @@ guestfs__inspect_get_arch (guestfs_h *g, const char *root) char * guestfs__inspect_get_distro (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2125,7 +215,7 @@ guestfs__inspect_get_distro (guestfs_h *g, const char *root) int guestfs__inspect_get_major_version (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return -1; @@ -2135,7 +225,7 @@ guestfs__inspect_get_major_version (guestfs_h *g, const char *root) int guestfs__inspect_get_minor_version (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return -1; @@ -2145,7 +235,7 @@ guestfs__inspect_get_minor_version (guestfs_h *g, const char *root) char * guestfs__inspect_get_product_name (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2155,7 +245,7 @@ guestfs__inspect_get_product_name (guestfs_h *g, const char *root) char * guestfs__inspect_get_product_variant (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2165,7 +255,7 @@ guestfs__inspect_get_product_variant (guestfs_h *g, const char *root) char * guestfs__inspect_get_windows_systemroot (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2181,7 +271,7 @@ char * guestfs__inspect_get_windows_current_control_set (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2196,7 +286,7 @@ guestfs__inspect_get_windows_current_control_set (guestfs_h *g, char * guestfs__inspect_get_format (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2213,7 +303,7 @@ guestfs__inspect_get_format (guestfs_h *g, const char *root) int guestfs__inspect_is_live (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return -1; @@ -2223,7 +313,7 @@ guestfs__inspect_is_live (guestfs_h *g, const char *root) int guestfs__inspect_is_netinst (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return -1; @@ -2233,7 +323,7 @@ guestfs__inspect_is_netinst (guestfs_h *g, const char *root) int guestfs__inspect_is_multipart (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return -1; @@ -2243,7 +333,7 @@ guestfs__inspect_is_multipart (guestfs_h *g, const char *root) char ** guestfs__inspect_get_mountpoints (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2286,7 +376,7 @@ guestfs__inspect_get_mountpoints (guestfs_h *g, const char *root) char ** guestfs__inspect_get_filesystems (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2320,7 +410,7 @@ guestfs__inspect_get_drive_mappings (guestfs_h *g, const char *root) size_t i, count; struct inspect_fs *fs; - fs = search_for_root (g, root); + fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2352,7 +442,7 @@ guestfs__inspect_get_drive_mappings (guestfs_h *g, const char *root) char * guestfs__inspect_get_package_format (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2375,7 +465,7 @@ guestfs__inspect_get_package_format (guestfs_h *g, const char *root) char * guestfs__inspect_get_package_management (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; @@ -2400,482 +490,13 @@ guestfs__inspect_get_package_management (guestfs_h *g, const char *root) char * guestfs__inspect_get_hostname (guestfs_h *g, const char *root) { - struct inspect_fs *fs = search_for_root (g, root); + struct inspect_fs *fs = guestfs___search_for_root (g, root); if (!fs) return NULL; return safe_strdup (g, fs->hostname ? : "unknown"); } -#ifdef DB_DUMP -static struct guestfs_application_list *list_applications_rpm (guestfs_h *g, struct inspect_fs *fs); -#endif -static struct guestfs_application_list *list_applications_deb (guestfs_h *g, struct inspect_fs *fs); -static struct guestfs_application_list *list_applications_windows (guestfs_h *g, struct inspect_fs *fs); -static void add_application (guestfs_h *g, struct guestfs_application_list *, const char *name, const char *display_name, int32_t epoch, const char *version, const char *release, const char *install_path, const char *publisher, const char *url, const char *description); -static void sort_applications (struct guestfs_application_list *); - -/* Unlike the simple inspect-get-* calls, this one assumes that the - * disks are mounted up, and reads files from the mounted disks. - */ -struct guestfs_application_list * -guestfs__inspect_list_applications (guestfs_h *g, const char *root) -{ - struct inspect_fs *fs = search_for_root (g, root); - if (!fs) - return NULL; - - struct guestfs_application_list *ret = NULL; - - /* Presently we can only list applications for installed disks. It - * is possible in future to get lists of packages from installers. - */ - if (fs->format == OS_FORMAT_INSTALLED) { - switch (fs->type) { - case OS_TYPE_LINUX: - switch (fs->package_format) { - case OS_PACKAGE_FORMAT_RPM: -#ifdef DB_DUMP - ret = list_applications_rpm (g, fs); - if (ret == NULL) - return NULL; -#endif - break; - - case OS_PACKAGE_FORMAT_DEB: - ret = list_applications_deb (g, fs); - if (ret == NULL) - return NULL; - break; - - case OS_PACKAGE_FORMAT_PACMAN: - case OS_PACKAGE_FORMAT_EBUILD: - case OS_PACKAGE_FORMAT_PISI: - case OS_PACKAGE_FORMAT_UNKNOWN: - default: - /* nothing - keep GCC happy */; - } - break; - - case OS_TYPE_WINDOWS: - ret = list_applications_windows (g, fs); - if (ret == NULL) - return NULL; - break; - - case OS_TYPE_FREEBSD: - case OS_TYPE_UNKNOWN: - default: - /* nothing - keep GCC happy */; - } - } - - if (ret == NULL) { - /* Don't know how to do inspection. Not an error, return an - * empty list. - */ - ret = safe_malloc (g, sizeof *ret); - ret->len = 0; - ret->val = NULL; - } - - sort_applications (ret); - - return ret; -} - -#ifdef DB_DUMP -static struct guestfs_application_list * -list_applications_rpm (guestfs_h *g, struct inspect_fs *fs) -{ - const char *basename = "rpm_Name"; - char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; - snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", - g->tmpdir, basename); - - if (download_to_tmp (g, "/var/lib/rpm/Name", basename, MAX_PKG_DB_SIZE) == -1) - return NULL; - - struct guestfs_application_list *apps = NULL, *ret = NULL; -#define cmd_len (strlen (tmpdir_basename) + 64) - char cmd[cmd_len]; - FILE *pp = NULL; - char line[1024]; - size_t len; - - snprintf (cmd, cmd_len, DB_DUMP " -p '%s'", tmpdir_basename); - - debug (g, "list_applications_rpm: %s", cmd); - - pp = popen (cmd, "r"); - if (pp == NULL) { - perrorf (g, "popen: %s", cmd); - goto out; - } - - /* Ignore everything to end-of-header marker. */ - for (;;) { - if (fgets (line, sizeof line, pp) == NULL) { - error (g, _("unexpected end of output from db_dump command")); - goto out; - } - - len = strlen (line); - if (len > 0 && line[len-1] == '\n') { - line[len-1] = '\0'; - len--; - } - - if (STREQ (line, "HEADER=END")) - break; - } - - /* Allocate 'apps' list. */ - apps = safe_malloc (g, sizeof *apps); - apps->len = 0; - apps->val = NULL; - - /* Read alternate lines until end of data marker. */ - for (;;) { - if (fgets (line, sizeof line, pp) == NULL) { - error (g, _("unexpected end of output from db_dump command")); - goto out; - } - - len = strlen (line); - if (len > 0 && line[len-1] == '\n') { - line[len-1] = '\0'; - len--; - } - - if (STREQ (line, "DATA=END")) - break; - - char *p = line; - if (len > 0 && line[0] == ' ') - p = line+1; - /* Ignore any application name that contains non-printable chars. - * In the db_dump output these would be escaped with backslash, so - * we can just ignore any such line. - */ - if (strchr (p, '\\') == NULL) - add_application (g, apps, p, "", 0, "", "", "", "", "", ""); - - /* Discard next line. */ - if (fgets (line, sizeof line, pp) == NULL) { - error (g, _("unexpected end of output from db_dump command")); - goto out; - } - } - - /* Catch errors from the db_dump command. */ - if (pclose (pp) == -1) { - perrorf (g, "pclose: %s", cmd); - goto out; - } - pp = NULL; - - ret = apps; - - out: - if (ret == NULL && apps != NULL) - guestfs_free_application_list (apps); - if (pp) - pclose (pp); - - return ret; -} -#endif /* defined DB_DUMP */ - -static struct guestfs_application_list * -list_applications_deb (guestfs_h *g, struct inspect_fs *fs) -{ - const char *basename = "deb_status"; - char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; - snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", - g->tmpdir, basename); - - if (download_to_tmp (g, "/var/lib/dpkg/status", basename, - MAX_PKG_DB_SIZE) == -1) - return NULL; - - struct guestfs_application_list *apps = NULL, *ret = NULL; - FILE *fp = NULL; - char line[1024]; - size_t len; - char *name = NULL, *version = NULL, *release = NULL; - int installed_flag = 0; - - fp = fopen (tmpdir_basename, "r"); - if (fp == NULL) { - perrorf (g, "fopen: %s", tmpdir_basename); - goto out; - } - - /* Allocate 'apps' list. */ - apps = safe_malloc (g, sizeof *apps); - apps->len = 0; - apps->val = NULL; - - /* Read the temporary file. Each package entry is separated by - * a blank line. - * XXX Strictly speaking this is in mailbox header format, so it - * would be possible for fields to spread across multiple lines, - * although for the short fields that we are concerned about this is - * unlikely and not seen in practice. - */ - while (fgets (line, sizeof line, fp) != NULL) { - len = strlen (line); - if (len > 0 && line[len-1] == '\n') { - line[len-1] = '\0'; - len--; - } - - if (STRPREFIX (line, "Package: ")) { - free (name); - name = safe_strdup (g, &line[9]); - } - else if (STRPREFIX (line, "Status: ")) { - installed_flag = strstr (&line[8], "installed") != NULL; - } - else if (STRPREFIX (line, "Version: ")) { - free (version); - free (release); - char *p = strchr (&line[9], '-'); - if (p) { - *p = '\0'; - version = safe_strdup (g, &line[9]); - release = safe_strdup (g, p+1); - } else { - version = safe_strdup (g, &line[9]); - release = NULL; - } - } - else if (STREQ (line, "")) { - if (installed_flag && name && version) - add_application (g, apps, name, "", 0, version, release ? : "", - "", "", "", ""); - free (name); - free (version); - free (release); - name = version = release = NULL; - installed_flag = 0; - } - } - - if (fclose (fp) == -1) { - perrorf (g, "fclose: %s", tmpdir_basename); - goto out; - } - fp = NULL; - - ret = apps; - - out: - if (ret == NULL && apps != NULL) - guestfs_free_application_list (apps); - if (fp) - fclose (fp); - free (name); - free (version); - free (release); - return ret; -} - -static void list_applications_windows_from_path (guestfs_h *g, hive_h *h, struct guestfs_application_list *apps, const char **path, size_t path_len); - -static struct guestfs_application_list * -list_applications_windows (guestfs_h *g, struct inspect_fs *fs) -{ - const char *basename = "software"; - char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; - snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", - g->tmpdir, basename); - - size_t len = strlen (fs->windows_systemroot) + 64; - char software[len]; - snprintf (software, len, "%s/system32/config/software", - fs->windows_systemroot); - - char *software_path = case_sensitive_path_silently (g, software); - if (!software_path) - /* If the software hive doesn't exist, just accept that we cannot - * list windows apps. - */ - return 0; - - struct guestfs_application_list *ret = NULL; - hive_h *h = NULL; - - if (download_to_tmp (g, software_path, basename, MAX_REGISTRY_SIZE) == -1) - goto out; - - free (software_path); - software_path = NULL; - - h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); - if (h == NULL) { - perrorf (g, "hivex_open"); - goto out; - } - - /* Allocate apps list. */ - ret = safe_malloc (g, sizeof *ret); - ret->len = 0; - ret->val = NULL; - - /* Ordinary native applications. */ - const char *hivepath[] = - { "Microsoft", "Windows", "CurrentVersion", "Uninstall" }; - list_applications_windows_from_path (g, h, ret, hivepath, - sizeof hivepath / sizeof hivepath[0]); - - /* 32-bit emulated Windows apps running on the WOW64 emulator. - * http://support.microsoft.com/kb/896459 (RHBZ#692545). - */ - const char *hivepath2[] = - { "WOW6432node", "Microsoft", "Windows", "CurrentVersion", "Uninstall" }; - list_applications_windows_from_path (g, h, ret, hivepath2, - sizeof hivepath2 / sizeof hivepath2[0]); - - out: - if (h) hivex_close (h); - free (software_path); - - return ret; -} - -static void -list_applications_windows_from_path (guestfs_h *g, hive_h *h, - struct guestfs_application_list *apps, - const char **path, size_t path_len) -{ - hive_node_h *children = NULL; - hive_node_h node; - size_t i; - - node = hivex_root (h); - - for (i = 0; node != 0 && i < path_len; ++i) - node = hivex_node_get_child (h, node, path[i]); - - if (node == 0) - return; - - children = hivex_node_children (h, node); - if (children == NULL) - return; - - /* Consider any child node that has a DisplayName key. - * See also: - * http://nsis.sourceforge.net/Add_uninstall_information_to_Add/Remove_Programs#Optional_values - */ - for (i = 0; children[i] != 0; ++i) { - hive_value_h value; - char *name = NULL; - char *display_name = NULL; - char *version = NULL; - char *install_path = NULL; - char *publisher = NULL; - char *url = NULL; - char *comments = NULL; - - /* Use the node name as a proxy for the package name in Linux. The - * display name is not language-independent, so it cannot be used. - */ - name = hivex_node_name (h, children[i]); - if (name == NULL) - continue; - - value = hivex_node_get_value (h, children[i], "DisplayName"); - if (value) { - display_name = hivex_value_string (h, value); - if (display_name) { - value = hivex_node_get_value (h, children[i], "DisplayVersion"); - if (value) - version = hivex_value_string (h, value); - value = hivex_node_get_value (h, children[i], "InstallLocation"); - if (value) - install_path = hivex_value_string (h, value); - value = hivex_node_get_value (h, children[i], "Publisher"); - if (value) - publisher = hivex_value_string (h, value); - value = hivex_node_get_value (h, children[i], "URLInfoAbout"); - if (value) - url = hivex_value_string (h, value); - value = hivex_node_get_value (h, children[i], "Comments"); - if (value) - comments = hivex_value_string (h, value); - - add_application (g, apps, name, display_name, 0, - version ? : "", - "", - install_path ? : "", - publisher ? : "", - url ? : "", - comments ? : ""); - } - } - - free (name); - free (display_name); - free (version); - free (install_path); - free (publisher); - free (url); - free (comments); - } - - free (children); -} - -static void -add_application (guestfs_h *g, struct guestfs_application_list *apps, - const char *name, const char *display_name, int32_t epoch, - const char *version, const char *release, - const char *install_path, - const char *publisher, const char *url, - const char *description) -{ - apps->len++; - apps->val = safe_realloc (g, apps->val, - apps->len * sizeof (struct guestfs_application)); - apps->val[apps->len-1].app_name = safe_strdup (g, name); - apps->val[apps->len-1].app_display_name = safe_strdup (g, display_name); - apps->val[apps->len-1].app_epoch = epoch; - apps->val[apps->len-1].app_version = safe_strdup (g, version); - apps->val[apps->len-1].app_release = safe_strdup (g, release); - apps->val[apps->len-1].app_install_path = safe_strdup (g, install_path); - /* XXX Translated path is not implemented yet. */ - apps->val[apps->len-1].app_trans_path = safe_strdup (g, ""); - apps->val[apps->len-1].app_publisher = safe_strdup (g, publisher); - apps->val[apps->len-1].app_url = safe_strdup (g, url); - /* XXX The next two are not yet implemented for any package - * format, but we could easily support them for rpm and deb. - */ - apps->val[apps->len-1].app_source_package = safe_strdup (g, ""); - apps->val[apps->len-1].app_summary = safe_strdup (g, ""); - apps->val[apps->len-1].app_description = safe_strdup (g, description); -} - -/* Sort applications by name before returning the list. */ -static int -compare_applications (const void *vp1, const void *vp2) -{ - const struct guestfs_application *v1 = vp1; - const struct guestfs_application *v2 = vp2; - - return strcmp (v1->app_name, v2->app_name); -} - -static void -sort_applications (struct guestfs_application_list *apps) -{ - if (apps && apps->val) - qsort (apps->val, apps->len, sizeof (struct guestfs_application), - compare_applications); -} - /* Download a guest file to a local temporary file. The file is * downloaded into g->tmpdir, unless it already exists in g->tmpdir. * The final name will be g->tmpdir + "/" + basename. Refuse to @@ -2883,9 +504,9 @@ sort_applications (struct guestfs_application_list *apps) * does not need to delete the temporary file after use: it will be * deleted when the handle is cleaned up. */ -static int -download_to_tmp (guestfs_h *g, const char *filename, - const char *basename, int64_t max_size) +int +guestfs___download_to_tmp (guestfs_h *g, const char *filename, + const char *basename, int64_t max_size) { int tmpdirfd, fd, r = -1; char buf[32]; @@ -2942,136 +563,25 @@ download_to_tmp (guestfs_h *g, const char *filename, return r; } -/* Call 'f' with Augeas opened and having parsed 'filename' (this file - * must exist). As a security measure, this bails if the file is too - * large for a reasonable configuration file. After the call to 'f' - * Augeas is closed. - */ -static int -inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char *filename, - int (*f) (guestfs_h *, struct inspect_fs *)) -{ - /* Security: Refuse to do this if filename is too large. */ - int64_t size = guestfs_filesize (g, filename); - if (size == -1) - /* guestfs_filesize failed and has already set error in handle */ - return -1; - if (size > MAX_AUGEAS_FILE_SIZE) { - error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), - filename, size); - return -1; - } - - /* If !feature_available (g, "augeas") then the next call will fail. - * Arguably we might want to fall back to a non-Augeas method in - * this case. - */ - if (guestfs_aug_init (g, "/", 16|32) == -1) - return -1; - - int r = -1; - - /* Tell Augeas to only load one file (thanks Raphaël Pinson). */ - char buf[strlen (filename) + 64]; - snprintf (buf, strlen (filename) + 64, "/augeas/load//incl[. != \"%s\"]", - filename); - if (guestfs_aug_rm (g, buf) == -1) - goto out; - - if (guestfs_aug_load (g) == -1) - goto out; - - r = f (g, fs); - - out: - guestfs_aug_close (g); - - return r; -} - -/* Get the first line of a small file, without any trailing newline - * character. - */ -static char * -first_line_of_file (guestfs_h *g, const char *filename) +struct inspect_fs * +guestfs___search_for_root (guestfs_h *g, const char *root) { - char **lines; - int64_t size; - char *ret; - - /* Don't trust guestfs_head_n not to break with very large files. - * Check the file size is something reasonable first. - */ - size = guestfs_filesize (g, filename); - if (size == -1) - /* guestfs_filesize failed and has already set error in handle */ - return NULL; - if (size > MAX_SMALL_FILE_SIZE) { - error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), - filename, size); - return NULL; - } - - lines = guestfs_head_n (g, 1, filename); - if (lines == NULL) - return NULL; - if (lines[0] == NULL) { - error (g, _("%s: file is empty"), filename); - guestfs___free_string_list (lines); + if (g->nr_fses == 0) { + error (g, _("no inspection data: call guestfs_inspect_os first")); return NULL; } - /* lines[1] should be NULL because of '1' argument above ... */ - - ret = lines[0]; /* caller frees */ - free (lines); /* free the array */ - - return ret; -} -/* Get the first matching line (using guestfs_egrep{,i}) of a small file, - * without any trailing newline character. - * - * Returns: 1 = returned a line (in *ret) - * 0 = no match - * -1 = error - */ -static int -first_egrep_of_file (guestfs_h *g, const char *filename, - const char *eregex, int iflag, char **ret) -{ - char **lines; - int64_t size; size_t i; - - /* Don't trust guestfs_egrep not to break with very large files. - * Check the file size is something reasonable first. - */ - size = guestfs_filesize (g, filename); - if (size == -1) - /* guestfs_filesize failed and has already set error in handle */ - return -1; - if (size > MAX_SMALL_FILE_SIZE) { - error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), - filename, size); - return -1; - } - - lines = (!iflag ? guestfs_egrep : guestfs_egrepi) (g, eregex, filename); - if (lines == NULL) - return -1; - if (lines[0] == NULL) { - guestfs___free_string_list (lines); - return 0; + struct inspect_fs *fs; + for (i = 0; i < g->nr_fses; ++i) { + fs = &g->fses[i]; + if (fs->is_root && STREQ (root, fs->device)) + return fs; } - *ret = lines[0]; /* caller frees */ - - /* free up any other matches and the array itself */ - for (i = 1; lines[i] != NULL; ++i) - free (lines[i]); - free (lines); - - return 1; + error (g, _("%s: root device not found: only call this function with a root device previously returned by guestfs_inspect_os"), + root); + return NULL; } #else /* no PCRE or hivex at compile time */ @@ -3185,12 +695,6 @@ guestfs__inspect_get_hostname (guestfs_h *g, const char *root) NOT_IMPL(NULL); } -struct guestfs_application_list * -guestfs__inspect_list_applications (guestfs_h *g, const char *root) -{ - NOT_IMPL(NULL); -} - char * guestfs__inspect_get_format (guestfs_h *g, const char *root) { diff --git a/src/inspect_apps.c b/src/inspect_apps.c new file mode 100644 index 0000000..df99df9 --- /dev/null +++ b/src/inspect_apps.c @@ -0,0 +1,536 @@ +/* libguestfs + * Copyright (C) 2010-2011 Red Hat Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PCRE +#include +#endif + +#ifdef HAVE_HIVEX +#include +#endif + +#include "c-ctype.h" +#include "ignore-value.h" +#include "xstrtol.h" + +#include "guestfs.h" +#include "guestfs-internal.h" +#include "guestfs-internal-actions.h" +#include "guestfs_protocol.h" + +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) + +#ifdef DB_DUMP +static struct guestfs_application_list *list_applications_rpm (guestfs_h *g, struct inspect_fs *fs); +#endif +static struct guestfs_application_list *list_applications_deb (guestfs_h *g, struct inspect_fs *fs); +static struct guestfs_application_list *list_applications_windows (guestfs_h *g, struct inspect_fs *fs); +static void add_application (guestfs_h *g, struct guestfs_application_list *, const char *name, const char *display_name, int32_t epoch, const char *version, const char *release, const char *install_path, const char *publisher, const char *url, const char *description); +static void sort_applications (struct guestfs_application_list *); + +/* Unlike the simple inspect-get-* calls, this one assumes that the + * disks are mounted up, and reads files from the mounted disks. + */ +struct guestfs_application_list * +guestfs__inspect_list_applications (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = guestfs___search_for_root (g, root); + if (!fs) + return NULL; + + struct guestfs_application_list *ret = NULL; + + /* Presently we can only list applications for installed disks. It + * is possible in future to get lists of packages from installers. + */ + if (fs->format == OS_FORMAT_INSTALLED) { + switch (fs->type) { + case OS_TYPE_LINUX: + switch (fs->package_format) { + case OS_PACKAGE_FORMAT_RPM: +#ifdef DB_DUMP + ret = list_applications_rpm (g, fs); + if (ret == NULL) + return NULL; +#endif + break; + + case OS_PACKAGE_FORMAT_DEB: + ret = list_applications_deb (g, fs); + if (ret == NULL) + return NULL; + break; + + case OS_PACKAGE_FORMAT_PACMAN: + case OS_PACKAGE_FORMAT_EBUILD: + case OS_PACKAGE_FORMAT_PISI: + case OS_PACKAGE_FORMAT_UNKNOWN: + default: + /* nothing - keep GCC happy */; + } + break; + + case OS_TYPE_WINDOWS: + ret = list_applications_windows (g, fs); + if (ret == NULL) + return NULL; + break; + + case OS_TYPE_FREEBSD: + case OS_TYPE_UNKNOWN: + default: + /* nothing - keep GCC happy */; + } + } + + if (ret == NULL) { + /* Don't know how to do inspection. Not an error, return an + * empty list. + */ + ret = safe_malloc (g, sizeof *ret); + ret->len = 0; + ret->val = NULL; + } + + sort_applications (ret); + + return ret; +} + +#ifdef DB_DUMP +static struct guestfs_application_list * +list_applications_rpm (guestfs_h *g, struct inspect_fs *fs) +{ + const char *basename = "rpm_Name"; + char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; + snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", + g->tmpdir, basename); + + if (guestfs___download_to_tmp (g, "/var/lib/rpm/Name", basename, + MAX_PKG_DB_SIZE) == -1) + return NULL; + + struct guestfs_application_list *apps = NULL, *ret = NULL; +#define cmd_len (strlen (tmpdir_basename) + 64) + char cmd[cmd_len]; + FILE *pp = NULL; + char line[1024]; + size_t len; + + snprintf (cmd, cmd_len, DB_DUMP " -p '%s'", tmpdir_basename); + + debug (g, "list_applications_rpm: %s", cmd); + + pp = popen (cmd, "r"); + if (pp == NULL) { + perrorf (g, "popen: %s", cmd); + goto out; + } + + /* Ignore everything to end-of-header marker. */ + for (;;) { + if (fgets (line, sizeof line, pp) == NULL) { + error (g, _("unexpected end of output from db_dump command")); + goto out; + } + + len = strlen (line); + if (len > 0 && line[len-1] == '\n') { + line[len-1] = '\0'; + len--; + } + + if (STREQ (line, "HEADER=END")) + break; + } + + /* Allocate 'apps' list. */ + apps = safe_malloc (g, sizeof *apps); + apps->len = 0; + apps->val = NULL; + + /* Read alternate lines until end of data marker. */ + for (;;) { + if (fgets (line, sizeof line, pp) == NULL) { + error (g, _("unexpected end of output from db_dump command")); + goto out; + } + + len = strlen (line); + if (len > 0 && line[len-1] == '\n') { + line[len-1] = '\0'; + len--; + } + + if (STREQ (line, "DATA=END")) + break; + + char *p = line; + if (len > 0 && line[0] == ' ') + p = line+1; + /* Ignore any application name that contains non-printable chars. + * In the db_dump output these would be escaped with backslash, so + * we can just ignore any such line. + */ + if (strchr (p, '\\') == NULL) + add_application (g, apps, p, "", 0, "", "", "", "", "", ""); + + /* Discard next line. */ + if (fgets (line, sizeof line, pp) == NULL) { + error (g, _("unexpected end of output from db_dump command")); + goto out; + } + } + + /* Catch errors from the db_dump command. */ + if (pclose (pp) == -1) { + perrorf (g, "pclose: %s", cmd); + goto out; + } + pp = NULL; + + ret = apps; + + out: + if (ret == NULL && apps != NULL) + guestfs_free_application_list (apps); + if (pp) + pclose (pp); + + return ret; +} +#endif /* defined DB_DUMP */ + +static struct guestfs_application_list * +list_applications_deb (guestfs_h *g, struct inspect_fs *fs) +{ + const char *basename = "deb_status"; + char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; + snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", + g->tmpdir, basename); + + if (guestfs___download_to_tmp (g, "/var/lib/dpkg/status", basename, + MAX_PKG_DB_SIZE) == -1) + return NULL; + + struct guestfs_application_list *apps = NULL, *ret = NULL; + FILE *fp = NULL; + char line[1024]; + size_t len; + char *name = NULL, *version = NULL, *release = NULL; + int installed_flag = 0; + + fp = fopen (tmpdir_basename, "r"); + if (fp == NULL) { + perrorf (g, "fopen: %s", tmpdir_basename); + goto out; + } + + /* Allocate 'apps' list. */ + apps = safe_malloc (g, sizeof *apps); + apps->len = 0; + apps->val = NULL; + + /* Read the temporary file. Each package entry is separated by + * a blank line. + * XXX Strictly speaking this is in mailbox header format, so it + * would be possible for fields to spread across multiple lines, + * although for the short fields that we are concerned about this is + * unlikely and not seen in practice. + */ + while (fgets (line, sizeof line, fp) != NULL) { + len = strlen (line); + if (len > 0 && line[len-1] == '\n') { + line[len-1] = '\0'; + len--; + } + + if (STRPREFIX (line, "Package: ")) { + free (name); + name = safe_strdup (g, &line[9]); + } + else if (STRPREFIX (line, "Status: ")) { + installed_flag = strstr (&line[8], "installed") != NULL; + } + else if (STRPREFIX (line, "Version: ")) { + free (version); + free (release); + char *p = strchr (&line[9], '-'); + if (p) { + *p = '\0'; + version = safe_strdup (g, &line[9]); + release = safe_strdup (g, p+1); + } else { + version = safe_strdup (g, &line[9]); + release = NULL; + } + } + else if (STREQ (line, "")) { + if (installed_flag && name && version) + add_application (g, apps, name, "", 0, version, release ? : "", + "", "", "", ""); + free (name); + free (version); + free (release); + name = version = release = NULL; + installed_flag = 0; + } + } + + if (fclose (fp) == -1) { + perrorf (g, "fclose: %s", tmpdir_basename); + goto out; + } + fp = NULL; + + ret = apps; + + out: + if (ret == NULL && apps != NULL) + guestfs_free_application_list (apps); + if (fp) + fclose (fp); + free (name); + free (version); + free (release); + return ret; +} + +static void list_applications_windows_from_path (guestfs_h *g, hive_h *h, struct guestfs_application_list *apps, const char **path, size_t path_len); + +static struct guestfs_application_list * +list_applications_windows (guestfs_h *g, struct inspect_fs *fs) +{ + const char *basename = "software"; + char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; + snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", + g->tmpdir, basename); + + size_t len = strlen (fs->windows_systemroot) + 64; + char software[len]; + snprintf (software, len, "%s/system32/config/software", + fs->windows_systemroot); + + char *software_path = guestfs___case_sensitive_path_silently (g, software); + if (!software_path) + /* If the software hive doesn't exist, just accept that we cannot + * list windows apps. + */ + return 0; + + struct guestfs_application_list *ret = NULL; + hive_h *h = NULL; + + if (guestfs___download_to_tmp (g, software_path, basename, + MAX_REGISTRY_SIZE) == -1) + goto out; + + free (software_path); + software_path = NULL; + + h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); + if (h == NULL) { + perrorf (g, "hivex_open"); + goto out; + } + + /* Allocate apps list. */ + ret = safe_malloc (g, sizeof *ret); + ret->len = 0; + ret->val = NULL; + + /* Ordinary native applications. */ + const char *hivepath[] = + { "Microsoft", "Windows", "CurrentVersion", "Uninstall" }; + list_applications_windows_from_path (g, h, ret, hivepath, + sizeof hivepath / sizeof hivepath[0]); + + /* 32-bit emulated Windows apps running on the WOW64 emulator. + * http://support.microsoft.com/kb/896459 (RHBZ#692545). + */ + const char *hivepath2[] = + { "WOW6432node", "Microsoft", "Windows", "CurrentVersion", "Uninstall" }; + list_applications_windows_from_path (g, h, ret, hivepath2, + sizeof hivepath2 / sizeof hivepath2[0]); + + out: + if (h) hivex_close (h); + free (software_path); + + return ret; +} + +static void +list_applications_windows_from_path (guestfs_h *g, hive_h *h, + struct guestfs_application_list *apps, + const char **path, size_t path_len) +{ + hive_node_h *children = NULL; + hive_node_h node; + size_t i; + + node = hivex_root (h); + + for (i = 0; node != 0 && i < path_len; ++i) + node = hivex_node_get_child (h, node, path[i]); + + if (node == 0) + return; + + children = hivex_node_children (h, node); + if (children == NULL) + return; + + /* Consider any child node that has a DisplayName key. + * See also: + * http://nsis.sourceforge.net/Add_uninstall_information_to_Add/Remove_Programs#Optional_values + */ + for (i = 0; children[i] != 0; ++i) { + hive_value_h value; + char *name = NULL; + char *display_name = NULL; + char *version = NULL; + char *install_path = NULL; + char *publisher = NULL; + char *url = NULL; + char *comments = NULL; + + /* Use the node name as a proxy for the package name in Linux. The + * display name is not language-independent, so it cannot be used. + */ + name = hivex_node_name (h, children[i]); + if (name == NULL) + continue; + + value = hivex_node_get_value (h, children[i], "DisplayName"); + if (value) { + display_name = hivex_value_string (h, value); + if (display_name) { + value = hivex_node_get_value (h, children[i], "DisplayVersion"); + if (value) + version = hivex_value_string (h, value); + value = hivex_node_get_value (h, children[i], "InstallLocation"); + if (value) + install_path = hivex_value_string (h, value); + value = hivex_node_get_value (h, children[i], "Publisher"); + if (value) + publisher = hivex_value_string (h, value); + value = hivex_node_get_value (h, children[i], "URLInfoAbout"); + if (value) + url = hivex_value_string (h, value); + value = hivex_node_get_value (h, children[i], "Comments"); + if (value) + comments = hivex_value_string (h, value); + + add_application (g, apps, name, display_name, 0, + version ? : "", + "", + install_path ? : "", + publisher ? : "", + url ? : "", + comments ? : ""); + } + } + + free (name); + free (display_name); + free (version); + free (install_path); + free (publisher); + free (url); + free (comments); + } + + free (children); +} + +static void +add_application (guestfs_h *g, struct guestfs_application_list *apps, + const char *name, const char *display_name, int32_t epoch, + const char *version, const char *release, + const char *install_path, + const char *publisher, const char *url, + const char *description) +{ + apps->len++; + apps->val = safe_realloc (g, apps->val, + apps->len * sizeof (struct guestfs_application)); + apps->val[apps->len-1].app_name = safe_strdup (g, name); + apps->val[apps->len-1].app_display_name = safe_strdup (g, display_name); + apps->val[apps->len-1].app_epoch = epoch; + apps->val[apps->len-1].app_version = safe_strdup (g, version); + apps->val[apps->len-1].app_release = safe_strdup (g, release); + apps->val[apps->len-1].app_install_path = safe_strdup (g, install_path); + /* XXX Translated path is not implemented yet. */ + apps->val[apps->len-1].app_trans_path = safe_strdup (g, ""); + apps->val[apps->len-1].app_publisher = safe_strdup (g, publisher); + apps->val[apps->len-1].app_url = safe_strdup (g, url); + /* XXX The next two are not yet implemented for any package + * format, but we could easily support them for rpm and deb. + */ + apps->val[apps->len-1].app_source_package = safe_strdup (g, ""); + apps->val[apps->len-1].app_summary = safe_strdup (g, ""); + apps->val[apps->len-1].app_description = safe_strdup (g, description); +} + +/* Sort applications by name before returning the list. */ +static int +compare_applications (const void *vp1, const void *vp2) +{ + const struct guestfs_application *v1 = vp1; + const struct guestfs_application *v2 = vp2; + + return strcmp (v1->app_name, v2->app_name); +} + +static void +sort_applications (struct guestfs_application_list *apps) +{ + if (apps && apps->val) + qsort (apps->val, apps->len, sizeof (struct guestfs_application), + compare_applications); +} + +#else /* no PCRE or hivex at compile time */ + +/* XXX These functions should be in an optgroup. */ + +#define NOT_IMPL(r) \ + error (g, _("inspection API not available since this version of libguestfs was compiled without PCRE or hivex libraries")); \ + return r + +struct guestfs_application_list * +guestfs__inspect_list_applications (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +#endif /* no PCRE or hivex at compile time */ diff --git a/src/inspect_fs.c b/src/inspect_fs.c new file mode 100644 index 0000000..15d6f96 --- /dev/null +++ b/src/inspect_fs.c @@ -0,0 +1,537 @@ +/* libguestfs + * Copyright (C) 2010-2011 Red Hat Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PCRE +#include +#endif + +#ifdef HAVE_HIVEX +#include +#endif + +#include "c-ctype.h" +#include "ignore-value.h" +#include "xstrtol.h" + +#include "guestfs.h" +#include "guestfs-internal.h" +#include "guestfs-internal-actions.h" +#include "guestfs_protocol.h" + +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) + +/* Compile all the regular expressions once when the shared library is + * loaded. PCRE is thread safe so we're supposedly OK here if + * multiple threads call into the libguestfs API functions below + * simultaneously. + */ +static pcre *re_first_partition; +static pcre *re_major_minor; + +static void compile_regexps (void) __attribute__((constructor)); +static void free_regexps (void) __attribute__((destructor)); + +static void +compile_regexps (void) +{ + const char *err; + int offset; + +#define COMPILE(re,pattern,options) \ + do { \ + re = pcre_compile ((pattern), (options), &err, &offset, NULL); \ + if (re == NULL) { \ + ignore_value (write (2, err, strlen (err))); \ + abort (); \ + } \ + } while (0) + + COMPILE (re_first_partition, "^/dev/(?:h|s|v)d.1$", 0); + COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0); +} + +static void +free_regexps (void) +{ + pcre_free (re_first_partition); + pcre_free (re_major_minor); +} + +static int check_filesystem (guestfs_h *g, const char *device, int is_block, int is_partnum); +static void check_package_format (guestfs_h *g, struct inspect_fs *fs); +static void check_package_management (guestfs_h *g, struct inspect_fs *fs); +static int extend_fses (guestfs_h *g); +static int is_file_nocase (guestfs_h *g, const char *); +static int is_dir_nocase (guestfs_h *g, const char *); + +/* Find out if 'device' contains a filesystem. If it does, add + * another entry in g->fses. + */ +int +guestfs___check_for_filesystem_on (guestfs_h *g, const char *device, + int is_block, int is_partnum) +{ + /* Get vfs-type in order to check if it's a Linux(?) swap device. + * If there's an error we should ignore it, so to do that we have to + * temporarily replace the error handler with a null one. + */ + guestfs_error_handler_cb old_error_cb = g->error_cb; + g->error_cb = NULL; + char *vfs_type = guestfs_vfs_type (g, device); + g->error_cb = old_error_cb; + + int is_swap = vfs_type && STREQ (vfs_type, "swap"); + + debug (g, "check_for_filesystem_on: %s %d %d (%s)", + device, is_block, is_partnum, + vfs_type ? vfs_type : "failed to get vfs type"); + + if (is_swap) { + free (vfs_type); + if (extend_fses (g) == -1) + return -1; + g->fses[g->nr_fses-1].is_swap = 1; + return 0; + } + + /* Try mounting the device. As above, ignore errors. */ + g->error_cb = NULL; + int r = guestfs_mount_ro (g, device, "/"); + if (r == -1 && vfs_type && STREQ (vfs_type, "ufs")) /* Hack for the *BSDs. */ + r = guestfs_mount_vfs (g, "ro,ufstype=ufs2", "ufs", device, "/"); + free (vfs_type); + g->error_cb = old_error_cb; + if (r == -1) + return 0; + + /* Do the rest of the checks. */ + r = check_filesystem (g, device, is_block, is_partnum); + + /* Unmount the filesystem. */ + if (guestfs_umount_all (g) == -1) + return -1; + + return r; +} + +/* is_block and is_partnum are just hints: is_block is true if the + * filesystem is a whole block device (eg. /dev/sda). is_partnum + * is > 0 if the filesystem is a direct partition, and in this case + * it is the partition number counting from 1 + * (eg. /dev/sda1 => is_partnum == 1). + */ +static int +check_filesystem (guestfs_h *g, const char *device, + int is_block, int is_partnum) +{ + if (extend_fses (g) == -1) + return -1; + + struct inspect_fs *fs = &g->fses[g->nr_fses-1]; + + fs->device = safe_strdup (g, device); + fs->is_mountable = 1; + + /* Optimize some of the tests by avoiding multiple tests of the same thing. */ + int is_dir_etc = guestfs_is_dir (g, "/etc") > 0; + int is_dir_bin = guestfs_is_dir (g, "/bin") > 0; + int is_dir_share = guestfs_is_dir (g, "/share") > 0; + + /* Grub /boot? */ + if (guestfs_is_file (g, "/grub/menu.lst") > 0 || + guestfs_is_file (g, "/grub/grub.conf") > 0) + fs->content = FS_CONTENT_LINUX_BOOT; + /* FreeBSD root? */ + else if (is_dir_etc && + is_dir_bin && + guestfs_is_file (g, "/etc/freebsd-update.conf") > 0 && + guestfs_is_file (g, "/etc/fstab") > 0) { + /* Ignore /dev/sda1 which is a shadow of the real root filesystem + * that is probably /dev/sda5 (see: + * http://www.freebsd.org/doc/handbook/disk-organization.html) + */ + if (match (g, device, re_first_partition)) + return 0; + + fs->is_root = 1; + fs->content = FS_CONTENT_FREEBSD_ROOT; + fs->format = OS_FORMAT_INSTALLED; + if (guestfs___check_freebsd_root (g, fs) == -1) + return -1; + } + /* Linux root? */ + else if (is_dir_etc && + is_dir_bin && + guestfs_is_file (g, "/etc/fstab") > 0) { + fs->is_root = 1; + fs->content = FS_CONTENT_LINUX_ROOT; + fs->format = OS_FORMAT_INSTALLED; + if (guestfs___check_linux_root (g, fs) == -1) + return -1; + } + /* Linux /usr/local? */ + else if (is_dir_etc && + is_dir_bin && + is_dir_share && + guestfs_exists (g, "/local") == 0 && + guestfs_is_file (g, "/etc/fstab") == 0) + fs->content = FS_CONTENT_LINUX_USR_LOCAL; + /* Linux /usr? */ + else if (is_dir_etc && + is_dir_bin && + is_dir_share && + guestfs_exists (g, "/local") > 0 && + guestfs_is_file (g, "/etc/fstab") == 0) + fs->content = FS_CONTENT_LINUX_USR; + /* Linux /var? */ + else if (guestfs_is_dir (g, "/log") > 0 && + guestfs_is_dir (g, "/run") > 0 && + guestfs_is_dir (g, "/spool") > 0) + fs->content = FS_CONTENT_LINUX_VAR; + /* Windows root? + * Note that if a Windows guest has multiple disks and applications + * are installed on those other disks, then those other disks will + * contain "/Program Files" and "/System Volume Information". Those + * would *not* be Windows root disks. (RHBZ#674130) + */ + else if (is_file_nocase (g, "/AUTOEXEC.BAT") > 0 || + is_dir_nocase (g, "/WINDOWS") > 0 || + is_dir_nocase (g, "/WIN32") > 0 || + is_dir_nocase (g, "/WINNT") > 0 || + is_file_nocase (g, "/boot.ini") > 0 || + is_file_nocase (g, "/ntldr") > 0) { + fs->is_root = 1; + fs->content = FS_CONTENT_WINDOWS_ROOT; + fs->format = OS_FORMAT_INSTALLED; + if (guestfs___check_windows_root (g, fs) == -1) + return -1; + } + /* Windows volume with installed applications (but not root)? */ + else if (is_dir_nocase (g, "/System Volume Information") > 0 && + is_dir_nocase (g, "/Program Files") > 0) + fs->content = FS_CONTENT_WINDOWS_VOLUME_WITH_APPS; + /* Windows volume (but not root)? */ + else if (is_dir_nocase (g, "/System Volume Information") > 0) + fs->content = FS_CONTENT_WINDOWS_VOLUME; + /* Install CD/disk? Skip these checks if it's not a whole device + * (eg. CD) or the first partition (eg. bootable USB key). + */ + else if ((is_block || is_partnum == 1) && + (guestfs_is_file (g, "/isolinux/isolinux.cfg") > 0 || + guestfs_is_dir (g, "/EFI/BOOT") > 0 || + guestfs_is_file (g, "/images/install.img") > 0 || + guestfs_is_dir (g, "/.disk") > 0 || + guestfs_is_file (g, "/.discinfo") > 0 || + guestfs_is_file (g, "/i386/txtsetup.sif") > 0 || + guestfs_is_file (g, "/amd64/txtsetup.sif")) > 0) { + fs->is_root = 1; + fs->content = FS_CONTENT_INSTALLER; + fs->format = OS_FORMAT_INSTALLER; + if (guestfs___check_installer_root (g, fs) == -1) + return -1; + } + + /* The above code should have set fs->type and fs->distro fields, so + * we can now guess the package management system. + */ + check_package_format (g, fs); + check_package_management (g, fs); + + return 0; +} + +static int +extend_fses (guestfs_h *g) +{ + size_t n = g->nr_fses + 1; + struct inspect_fs *p; + + p = realloc (g->fses, n * sizeof (struct inspect_fs)); + if (p == NULL) { + perrorf (g, "realloc"); + return -1; + } + + g->fses = p; + g->nr_fses = n; + + memset (&g->fses[n-1], 0, sizeof (struct inspect_fs)); + + return 0; +} + +static int +is_file_nocase (guestfs_h *g, const char *path) +{ + char *p; + int r; + + p = guestfs___case_sensitive_path_silently (g, path); + if (!p) + return 0; + r = guestfs_is_file (g, p); + free (p); + return r > 0; +} + +static int +is_dir_nocase (guestfs_h *g, const char *path) +{ + char *p; + int r; + + p = guestfs___case_sensitive_path_silently (g, path); + if (!p) + return 0; + r = guestfs_is_dir (g, p); + free (p); + return r > 0; +} + +/* Parse small, unsigned ints, as used in version numbers. */ +int +guestfs___parse_unsigned_int (guestfs_h *g, const char *str) +{ + long ret; + int r = xstrtol (str, NULL, 10, &ret, ""); + if (r != LONGINT_OK) { + error (g, _("could not parse integer in version number: %s"), str); + return -1; + } + return ret; +} + +/* Like parse_unsigned_int, but ignore trailing stuff. */ +int +guestfs___parse_unsigned_int_ignore_trailing (guestfs_h *g, const char *str) +{ + long ret; + int r = xstrtol (str, NULL, 10, &ret, NULL); + if (r != LONGINT_OK) { + error (g, _("could not parse integer in version number: %s"), str); + return -1; + } + return ret; +} + +/* Parse generic MAJOR.MINOR from the fs->product_name string. */ +int +guestfs___parse_major_minor (guestfs_h *g, struct inspect_fs *fs) +{ + char *major, *minor; + + if (match2 (g, fs->product_name, re_major_minor, &major, &minor)) { + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) { + free (minor); + return -1; + } + fs->minor_version = guestfs___parse_unsigned_int (g, minor); + free (minor); + if (fs->minor_version == -1) + return -1; + } + return 0; +} + +/* At the moment, package format and package management is just a + * simple function of the distro and major_version fields, so these + * can never return an error. We might be cleverer in future. + */ +static void +check_package_format (guestfs_h *g, struct inspect_fs *fs) +{ + switch (fs->distro) { + case OS_DISTRO_FEDORA: + case OS_DISTRO_MEEGO: + case OS_DISTRO_REDHAT_BASED: + case OS_DISTRO_RHEL: + case OS_DISTRO_MANDRIVA: + fs->package_format = OS_PACKAGE_FORMAT_RPM; + break; + + case OS_DISTRO_DEBIAN: + case OS_DISTRO_UBUNTU: + case OS_DISTRO_LINUX_MINT: + fs->package_format = OS_PACKAGE_FORMAT_DEB; + break; + + case OS_DISTRO_ARCHLINUX: + fs->package_format = OS_PACKAGE_FORMAT_PACMAN; + break; + case OS_DISTRO_GENTOO: + fs->package_format = OS_PACKAGE_FORMAT_EBUILD; + break; + case OS_DISTRO_PARDUS: + fs->package_format = OS_PACKAGE_FORMAT_PISI; + break; + + case OS_DISTRO_SLACKWARE: + case OS_DISTRO_WINDOWS: + case OS_DISTRO_UNKNOWN: + default: + fs->package_format = OS_PACKAGE_FORMAT_UNKNOWN; + break; + } +} + +static void +check_package_management (guestfs_h *g, struct inspect_fs *fs) +{ + switch (fs->distro) { + case OS_DISTRO_FEDORA: + case OS_DISTRO_MEEGO: + fs->package_management = OS_PACKAGE_MANAGEMENT_YUM; + break; + + case OS_DISTRO_REDHAT_BASED: + case OS_DISTRO_RHEL: + if (fs->major_version >= 5) + fs->package_management = OS_PACKAGE_MANAGEMENT_YUM; + else + fs->package_management = OS_PACKAGE_MANAGEMENT_UP2DATE; + break; + + case OS_DISTRO_DEBIAN: + case OS_DISTRO_UBUNTU: + case OS_DISTRO_LINUX_MINT: + fs->package_management = OS_PACKAGE_MANAGEMENT_APT; + break; + + case OS_DISTRO_ARCHLINUX: + fs->package_management = OS_PACKAGE_MANAGEMENT_PACMAN; + break; + case OS_DISTRO_GENTOO: + fs->package_management = OS_PACKAGE_MANAGEMENT_PORTAGE; + break; + case OS_DISTRO_PARDUS: + fs->package_management = OS_PACKAGE_MANAGEMENT_PISI; + break; + case OS_DISTRO_MANDRIVA: + fs->package_management = OS_PACKAGE_MANAGEMENT_URPMI; + break; + + case OS_DISTRO_SLACKWARE: + case OS_DISTRO_WINDOWS: + case OS_DISTRO_UNKNOWN: + default: + fs->package_management = OS_PACKAGE_MANAGEMENT_UNKNOWN; + break; + } +} + +/* Get the first line of a small file, without any trailing newline + * character. + */ +char * +guestfs___first_line_of_file (guestfs_h *g, const char *filename) +{ + char **lines; + int64_t size; + char *ret; + + /* Don't trust guestfs_head_n not to break with very large files. + * Check the file size is something reasonable first. + */ + size = guestfs_filesize (g, filename); + if (size == -1) + /* guestfs_filesize failed and has already set error in handle */ + return NULL; + if (size > MAX_SMALL_FILE_SIZE) { + error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), + filename, size); + return NULL; + } + + lines = guestfs_head_n (g, 1, filename); + if (lines == NULL) + return NULL; + if (lines[0] == NULL) { + error (g, _("%s: file is empty"), filename); + guestfs___free_string_list (lines); + return NULL; + } + /* lines[1] should be NULL because of '1' argument above ... */ + + ret = lines[0]; /* caller frees */ + free (lines); /* free the array */ + + return ret; +} + +/* Get the first matching line (using guestfs_egrep{,i}) of a small file, + * without any trailing newline character. + * + * Returns: 1 = returned a line (in *ret) + * 0 = no match + * -1 = error + */ +int +guestfs___first_egrep_of_file (guestfs_h *g, const char *filename, + const char *eregex, int iflag, char **ret) +{ + char **lines; + int64_t size; + size_t i; + + /* Don't trust guestfs_egrep not to break with very large files. + * Check the file size is something reasonable first. + */ + size = guestfs_filesize (g, filename); + if (size == -1) + /* guestfs_filesize failed and has already set error in handle */ + return -1; + if (size > MAX_SMALL_FILE_SIZE) { + error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), + filename, size); + return -1; + } + + lines = (!iflag ? guestfs_egrep : guestfs_egrepi) (g, eregex, filename); + if (lines == NULL) + return -1; + if (lines[0] == NULL) { + guestfs___free_string_list (lines); + return 0; + } + + *ret = lines[0]; /* caller frees */ + + /* free up any other matches and the array itself */ + for (i = 1; lines[i] != NULL; ++i) + free (lines[i]); + free (lines); + + return 1; +} + +#endif /* defined(HAVE_PCRE) && defined(HAVE_HIVEX) */ diff --git a/src/inspect_fs_cd.c b/src/inspect_fs_cd.c new file mode 100644 index 0000000..6ae08c3 --- /dev/null +++ b/src/inspect_fs_cd.c @@ -0,0 +1,404 @@ +/* libguestfs + * Copyright (C) 2010-2011 Red Hat Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PCRE +#include +#endif + +#ifdef HAVE_HIVEX +#include +#endif + +#include "c-ctype.h" +#include "ignore-value.h" +#include "xstrtol.h" + +#include "guestfs.h" +#include "guestfs-internal.h" +#include "guestfs-internal-actions.h" +#include "guestfs_protocol.h" + +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) + +/* Debian/Ubuntu install disks are easy ... + * + * These files are added by the debian-cd program, and it is worth + * looking at the source code to determine exact values, in + * particular '/usr/share/debian-cd/tools/start_new_disc' + * + * XXX Architecture? We could parse it out of the product name + * string, but that seems quite hairy. We could look for the names + * of packages. Also note that some Debian install disks are + * multiarch. + */ +static int +check_debian_installer_root (guestfs_h *g, struct inspect_fs *fs) +{ + fs->product_name = guestfs___first_line_of_file (g, "/.disk/info"); + if (!fs->product_name) + return -1; + + fs->type = OS_TYPE_LINUX; + if (STRPREFIX (fs->product_name, "Ubuntu")) + fs->distro = OS_DISTRO_UBUNTU; + else if (STRPREFIX (fs->product_name, "Debian")) + fs->distro = OS_DISTRO_DEBIAN; + + (void) guestfs___parse_major_minor (g, fs); + + if (guestfs_is_file (g, "/.disk/cd_type") > 0) { + char *cd_type = guestfs___first_line_of_file (g, "/.disk/cd_type"); + if (!cd_type) + return -1; + + if (STRPREFIX (cd_type, "dvd/single") || + STRPREFIX (cd_type, "full_cd/single")) { + fs->is_multipart_disk = 0; + fs->is_netinst_disk = 0; + } + else if (STRPREFIX (cd_type, "dvd") || + STRPREFIX (cd_type, "full_cd")) { + fs->is_multipart_disk = 1; + fs->is_netinst_disk = 0; + } + else if (STRPREFIX (cd_type, "not_complete")) { + fs->is_multipart_disk = 0; + fs->is_netinst_disk = 1; + } + + free (cd_type); + } + + return 0; +} + +/* Take string which must look like "key = value" and find the value. + * There may or may not be spaces before and after the equals sign. + * This function is used by both check_fedora_installer_root and + * check_w2k3_installer_root. + */ +static const char * +find_value (const char *kv) +{ + const char *p; + + p = strchr (kv, '='); + if (!p) + abort (); + + do { + ++p; + } while (c_isspace (*p)); + + return p; +} + +/* Fedora CDs and DVD (not netinst). The /.treeinfo file contains + * an initial section somewhat like this: + * + * [general] + * version = 14 + * arch = x86_64 + * family = Fedora + * variant = Fedora + * discnum = 1 + * totaldiscs = 1 + */ +static int +check_fedora_installer_root (guestfs_h *g, struct inspect_fs *fs) +{ + char *str; + const char *v; + int r; + int discnum = 0, totaldiscs = 0; + + fs->type = OS_TYPE_LINUX; + + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^family = Fedora$", 0, &str); + if (r == -1) + return -1; + if (r > 0) { + fs->distro = OS_DISTRO_FEDORA; + free (str); + } + + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^family = Red Hat Enterprise Linux$", + 0, &str); + if (r == -1) + return -1; + if (r > 0) { + fs->distro = OS_DISTRO_RHEL; + free (str); + } + + /* XXX should do major.minor before this */ + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^version = [[:digit:]]+", 0, &str); + if (r == -1) + return -1; + if (r > 0) { + v = find_value (str); + fs->major_version = guestfs___parse_unsigned_int_ignore_trailing (g, v); + free (str); + if (fs->major_version == -1) + return -1; + } + + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^arch = [-_[:alnum:]]+$", 0, &str); + if (r == -1) + return -1; + if (r > 0) { + v = find_value (str); + fs->arch = safe_strdup (g, v); + free (str); + } + + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^discnum = [[:digit:]]+$", 0, &str); + if (r == -1) + return -1; + if (r > 0) { + v = find_value (str); + discnum = guestfs___parse_unsigned_int (g, v); + free (str); + if (discnum == -1) + return -1; + } + + r = guestfs___first_egrep_of_file (g, "/.treeinfo", + "^totaldiscs = [[:digit:]]+$", 0, &str); + if (r == -1) + return -1; + if (r > 0) { + v = find_value (str); + totaldiscs = guestfs___parse_unsigned_int (g, v); + free (str); + if (totaldiscs == -1) + return -1; + } + + fs->is_multipart_disk = totaldiscs > 0; + /* and what about discnum? */ + + return 0; +} + +/* Linux with /isolinux/isolinux.cfg. + * + * This file is not easily parsable so we have to do our best. + * Look for the "menu title" line which contains: + * menu title Welcome to Fedora 14! # since at least Fedora 10 + * menu title Welcome to Red Hat Enterprise Linux 6.0! + */ +static int +check_isolinux_installer_root (guestfs_h *g, struct inspect_fs *fs) +{ + char *str; + int r; + + fs->type = OS_TYPE_LINUX; + + r = guestfs___first_egrep_of_file (g, "/isolinux/isolinux.cfg", + "^menu title Welcome to Fedora [[:digit:]]+", + 0, &str); + if (r == -1) + return -1; + if (r > 0) { + fs->distro = OS_DISTRO_FEDORA; + fs->major_version = + guestfs___parse_unsigned_int_ignore_trailing (g, &str[29]); + free (str); + if (fs->major_version == -1) + return -1; + } + + /* XXX parse major.minor */ + r = guestfs___first_egrep_of_file (g, "/isolinux/isolinux.cfg", + "^menu title Welcome to Red Hat Enterprise Linux [[:digit:]]+", + 0, &str); + if (r == -1) + return -1; + if (r > 0) { + fs->distro = OS_DISTRO_RHEL; + fs->major_version = + guestfs___parse_unsigned_int_ignore_trailing (g, &str[47]); + free (str); + if (fs->major_version == -1) + return -1; + } + + return 0; +} + +/* Windows 2003 and similar versions. + * + * NB: txtsetup file contains Windows \r\n line endings, which guestfs_grep + * does not remove. We have to remove them by hand here. + */ +static void +trim_cr (char *str) +{ + size_t n = strlen (str); + if (n > 0 && str[n-1] == '\r') + str[n-1] = '\0'; +} + +static void +trim_quot (char *str) +{ + size_t n = strlen (str); + if (n > 0 && str[n-1] == '"') + str[n-1] = '\0'; +} + +static int +check_w2k3_installer_root (guestfs_h *g, struct inspect_fs *fs, + const char *txtsetup) +{ + char *str; + const char *v; + int r; + + fs->type = OS_TYPE_WINDOWS; + fs->distro = OS_DISTRO_WINDOWS; + + r = guestfs___first_egrep_of_file (g, txtsetup, + "^productname[[:space:]]*=[[:space:]]*\"", 1, &str); + if (r == -1) + return -1; + if (r > 0) { + trim_cr (str); + trim_quot (str); + v = find_value (str); + fs->product_name = safe_strdup (g, v+1); + free (str); + } + + r = guestfs___first_egrep_of_file (g, txtsetup, + "^majorversion[[:space:]]*=[[:space:]]*[[:digit:]]+", + 1, &str); + if (r == -1) + return -1; + if (r > 0) { + trim_cr (str); + v = find_value (str); + fs->major_version = guestfs___parse_unsigned_int_ignore_trailing (g, v); + free (str); + if (fs->major_version == -1) + return -1; + } + + r = guestfs___first_egrep_of_file (g, txtsetup, + "^minorversion[[:space:]]*=[[:space:]]*[[:digit:]]+", + 1, &str); + if (r == -1) + return -1; + if (r > 0) { + trim_cr (str); + v = find_value (str); + fs->minor_version = guestfs___parse_unsigned_int_ignore_trailing (g, v); + free (str); + if (fs->minor_version == -1) + return -1; + } + + /* This is the windows systemroot that would be chosen on + * installation by default, although not necessarily the one that + * the user will finally choose. + */ + r = guestfs___first_egrep_of_file (g, txtsetup, + "^defaultpath[[:space:]]*=[[:space:]]*", + 1, &str); + if (r == -1) + return -1; + if (r > 0) { + trim_cr (str); + v = find_value (str); + fs->windows_systemroot = safe_strdup (g, v); + free (str); + } + + return 0; +} + +/* The currently mounted device is very likely to be an installer. */ +int +guestfs___check_installer_root (guestfs_h *g, struct inspect_fs *fs) +{ + /* The presence of certain files indicates a live CD. + * + * XXX Fedora netinst contains a ~120MB squashfs called + * /images/install.img. However this is not a live CD (unlike the + * Fedora live CDs which contain the same, but larger file). We + * need to unpack this and look inside to tell the difference. + */ + if (guestfs_is_file (g, "/casper/filesystem.squashfs") > 0) + fs->is_live_disk = 1; + + /* Debian/Ubuntu. */ + if (guestfs_is_file (g, "/.disk/info") > 0) { + if (check_debian_installer_root (g, fs) == -1) + return -1; + } + + /* Fedora CDs and DVD (not netinst). */ + else if (guestfs_is_file (g, "/.treeinfo") > 0) { + if (check_fedora_installer_root (g, fs) == -1) + return -1; + } + + /* Linux with /isolinux/isolinux.cfg. */ + else if (guestfs_is_file (g, "/isolinux/isolinux.cfg") > 0) { + if (check_isolinux_installer_root (g, fs) == -1) + return -1; + } + + /* Windows 2003 64 bit */ + else if (guestfs_is_file (g, "/amd64/txtsetup.sif") > 0) { + fs->arch = safe_strdup (g, "x86_64"); + if (check_w2k3_installer_root (g, fs, "/amd64/txtsetup.sif") == -1) + return -1; + } + + /* Windows 2003 32 bit */ + else if (guestfs_is_file (g, "/i386/txtsetup.sif") > 0) { + fs->arch = safe_strdup (g, "i386"); + if (check_w2k3_installer_root (g, fs, "/i386/txtsetup.sif") == -1) + return -1; + } + + return 0; +} + +#endif /* defined(HAVE_PCRE) && defined(HAVE_HIVEX) */ diff --git a/src/inspect_fs_unix.c b/src/inspect_fs_unix.c new file mode 100644 index 0000000..cf1affa --- /dev/null +++ b/src/inspect_fs_unix.c @@ -0,0 +1,785 @@ +/* libguestfs + * Copyright (C) 2010-2011 Red Hat Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PCRE +#include +#endif + +#ifdef HAVE_HIVEX +#include +#endif + +#include "c-ctype.h" +#include "ignore-value.h" +#include "xstrtol.h" + +#include "guestfs.h" +#include "guestfs-internal.h" +#include "guestfs-internal-actions.h" +#include "guestfs_protocol.h" + +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) + +/* Compile all the regular expressions once when the shared library is + * loaded. PCRE is thread safe so we're supposedly OK here if + * multiple threads call into the libguestfs API functions below + * simultaneously. + */ +static pcre *re_fedora; +static pcre *re_rhel_old; +static pcre *re_rhel; +static pcre *re_rhel_no_minor; +static pcre *re_major_minor; +static pcre *re_aug_seq; +static pcre *re_xdev; +static pcre *re_first_partition; +static pcre *re_freebsd; + +static void compile_regexps (void) __attribute__((constructor)); +static void free_regexps (void) __attribute__((destructor)); + +static void +compile_regexps (void) +{ + const char *err; + int offset; + +#define COMPILE(re,pattern,options) \ + do { \ + re = pcre_compile ((pattern), (options), &err, &offset, NULL); \ + if (re == NULL) { \ + ignore_value (write (2, err, strlen (err))); \ + abort (); \ + } \ + } while (0) + + COMPILE (re_fedora, "Fedora release (\\d+)", 0); + COMPILE (re_rhel_old, + "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+).*Update (\\d+)", 0); + COMPILE (re_rhel, + "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+)\\.(\\d+)", 0); + COMPILE (re_rhel_no_minor, + "(?:Red Hat|CentOS|Scientific Linux).*release (\\d+)", 0); + COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0); + COMPILE (re_aug_seq, "/\\d+$", 0); + COMPILE (re_xdev, "^/dev/(?:h|s|v|xv)d([a-z]\\d*)$", 0); + COMPILE (re_freebsd, "^/dev/ad(\\d+)s(\\d+)([a-z])$", 0); +} + +static void +free_regexps (void) +{ + pcre_free (re_fedora); + pcre_free (re_rhel_old); + pcre_free (re_rhel); + pcre_free (re_rhel_no_minor); + pcre_free (re_major_minor); + pcre_free (re_aug_seq); + pcre_free (re_xdev); + pcre_free (re_freebsd); +} + +static void check_architecture (guestfs_h *g, struct inspect_fs *fs); +static int check_hostname_unix (guestfs_h *g, struct inspect_fs *fs); +static int check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs); +static int check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs); +static int check_fstab (guestfs_h *g, struct inspect_fs *fs); +static int add_fstab_entry (guestfs_h *g, struct inspect_fs *fs, + const char *spec, const char *mp); +static char *resolve_fstab_device (guestfs_h *g, const char *spec); +static int inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char *filename, int (*f) (guestfs_h *, struct inspect_fs *)); + +/* Set fs->product_name to the first line of the release file. */ +static int +parse_release_file (guestfs_h *g, struct inspect_fs *fs, + const char *release_filename) +{ + fs->product_name = guestfs___first_line_of_file (g, release_filename); + if (fs->product_name == NULL) + return -1; + return 0; +} + +/* Ubuntu has /etc/lsb-release containing: + * DISTRIB_ID=Ubuntu # Distro + * DISTRIB_RELEASE=10.04 # Version + * DISTRIB_CODENAME=lucid + * DISTRIB_DESCRIPTION="Ubuntu 10.04.1 LTS" # Product name + * + * [Ubuntu-derived ...] Linux Mint was found to have this: + * DISTRIB_ID=LinuxMint + * DISTRIB_RELEASE=10 + * DISTRIB_CODENAME=julia + * DISTRIB_DESCRIPTION="Linux Mint 10 Julia" + * Linux Mint also has /etc/linuxmint/info with more information, + * but we can use the LSB file. + * + * Mandriva has: + * LSB_VERSION=lsb-4.0-amd64:lsb-4.0-noarch + * DISTRIB_ID=MandrivaLinux + * DISTRIB_RELEASE=2010.1 + * DISTRIB_CODENAME=Henry_Farman + * DISTRIB_DESCRIPTION="Mandriva Linux 2010.1" + * Mandriva also has a normal release file called /etc/mandriva-release. + */ +static int +parse_lsb_release (guestfs_h *g, struct inspect_fs *fs) +{ + const char *filename = "/etc/lsb-release"; + int64_t size; + char **lines; + size_t i; + int r = 0; + + /* Don't trust guestfs_head_n not to break with very large files. + * Check the file size is something reasonable first. + */ + size = guestfs_filesize (g, filename); + if (size == -1) + /* guestfs_filesize failed and has already set error in handle */ + return -1; + if (size > MAX_SMALL_FILE_SIZE) { + error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), + filename, size); + return -1; + } + + lines = guestfs_head_n (g, 10, filename); + if (lines == NULL) + return -1; + + for (i = 0; lines[i] != NULL; ++i) { + if (fs->distro == 0 && + STREQ (lines[i], "DISTRIB_ID=Ubuntu")) { + fs->distro = OS_DISTRO_UBUNTU; + r = 1; + } + else if (fs->distro == 0 && + STREQ (lines[i], "DISTRIB_ID=LinuxMint")) { + fs->distro = OS_DISTRO_LINUX_MINT; + r = 1; + } + else if (fs->distro == 0 && + STREQ (lines[i], "DISTRIB_ID=MandrivaLinux")) { + fs->distro = OS_DISTRO_MANDRIVA; + r = 1; + } + else if (STRPREFIX (lines[i], "DISTRIB_RELEASE=")) { + char *major, *minor; + if (match2 (g, &lines[i][16], re_major_minor, &major, &minor)) { + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) { + free (minor); + guestfs___free_string_list (lines); + return -1; + } + fs->minor_version = guestfs___parse_unsigned_int (g, minor); + free (minor); + if (fs->minor_version == -1) { + guestfs___free_string_list (lines); + return -1; + } + } + } + else if (fs->product_name == NULL && + (STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=\"") || + STRPREFIX (lines[i], "DISTRIB_DESCRIPTION='"))) { + size_t len = strlen (lines[i]) - 21 - 1; + fs->product_name = safe_strndup (g, &lines[i][21], len); + r = 1; + } + else if (fs->product_name == NULL && + STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=")) { + size_t len = strlen (lines[i]) - 20; + fs->product_name = safe_strndup (g, &lines[i][20], len); + r = 1; + } + } + + guestfs___free_string_list (lines); + return r; +} + +/* The currently mounted device is known to be a Linux root. Try to + * determine from this the distro, version, etc. Also parse + * /etc/fstab to determine the arrangement of mountpoints and + * associated devices. + */ +int +guestfs___check_linux_root (guestfs_h *g, struct inspect_fs *fs) +{ + int r; + + fs->type = OS_TYPE_LINUX; + + if (guestfs_exists (g, "/etc/lsb-release") > 0) { + r = parse_lsb_release (g, fs); + if (r == -1) /* error */ + return -1; + if (r == 1) /* ok - detected the release from this file */ + goto skip_release_checks; + } + + if (guestfs_exists (g, "/etc/redhat-release") > 0) { + fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */ + + if (parse_release_file (g, fs, "/etc/redhat-release") == -1) + return -1; + + char *major, *minor; + if ((major = match1 (g, fs->product_name, re_fedora)) != NULL) { + fs->distro = OS_DISTRO_FEDORA; + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) + return -1; + } + else if (match2 (g, fs->product_name, re_rhel_old, &major, &minor) || + match2 (g, fs->product_name, re_rhel, &major, &minor)) { + fs->distro = OS_DISTRO_RHEL; + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) { + free (minor); + return -1; + } + fs->minor_version = guestfs___parse_unsigned_int (g, minor); + free (minor); + if (fs->minor_version == -1) + return -1; + } + else if ((major = match1 (g, fs->product_name, re_rhel_no_minor)) != NULL) { + fs->distro = OS_DISTRO_RHEL; + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) + return -1; + fs->minor_version = 0; + } + } + else if (guestfs_exists (g, "/etc/debian_version") > 0) { + fs->distro = OS_DISTRO_DEBIAN; + + if (parse_release_file (g, fs, "/etc/debian_version") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + else if (guestfs_exists (g, "/etc/pardus-release") > 0) { + fs->distro = OS_DISTRO_PARDUS; + + if (parse_release_file (g, fs, "/etc/pardus-release") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + else if (guestfs_exists (g, "/etc/arch-release") > 0) { + fs->distro = OS_DISTRO_ARCHLINUX; + + /* /etc/arch-release file is empty and I can't see a way to + * determine the actual release or product string. + */ + } + else if (guestfs_exists (g, "/etc/gentoo-release") > 0) { + fs->distro = OS_DISTRO_GENTOO; + + if (parse_release_file (g, fs, "/etc/gentoo-release") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + else if (guestfs_exists (g, "/etc/meego-release") > 0) { + fs->distro = OS_DISTRO_MEEGO; + + if (parse_release_file (g, fs, "/etc/meego-release") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + else if (guestfs_exists (g, "/etc/slackware-version") > 0) { + fs->distro = OS_DISTRO_SLACKWARE; + + if (parse_release_file (g, fs, "/etc/slackware-version") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + + skip_release_checks:; + + /* Determine the architecture. */ + check_architecture (g, fs); + + /* We already know /etc/fstab exists because it's part of the test + * for Linux root above. We must now parse this file to determine + * which filesystems are used by the operating system and how they + * are mounted. + */ + if (inspect_with_augeas (g, fs, "/etc/fstab", check_fstab) == -1) + return -1; + + /* Determine hostname. */ + if (check_hostname_unix (g, fs) == -1) + return -1; + + return 0; +} + +/* The currently mounted device is known to be a FreeBSD root. */ +int +guestfs___check_freebsd_root (guestfs_h *g, struct inspect_fs *fs) +{ + fs->type = OS_TYPE_FREEBSD; + + /* FreeBSD has no authoritative version file. The version number is + * in /etc/motd, which the system administrator might edit, but + * we'll use that anyway. + */ + + if (guestfs_exists (g, "/etc/motd") > 0) { + if (parse_release_file (g, fs, "/etc/motd") == -1) + return -1; + + if (guestfs___parse_major_minor (g, fs) == -1) + return -1; + } + + /* Determine the architecture. */ + check_architecture (g, fs); + + /* We already know /etc/fstab exists because it's part of the test above. */ + if (inspect_with_augeas (g, fs, "/etc/fstab", check_fstab) == -1) + return -1; + + /* Determine hostname. */ + if (check_hostname_unix (g, fs) == -1) + return -1; + + return 0; +} + +static void +check_architecture (guestfs_h *g, struct inspect_fs *fs) +{ + const char *binaries[] = + { "/bin/bash", "/bin/ls", "/bin/echo", "/bin/rm", "/bin/sh" }; + size_t i; + + for (i = 0; i < sizeof binaries / sizeof binaries[0]; ++i) { + if (guestfs_is_file (g, binaries[i]) > 0) { + /* Ignore errors from file_architecture call. */ + guestfs_error_handler_cb old_error_cb = g->error_cb; + g->error_cb = NULL; + char *arch = guestfs_file_architecture (g, binaries[i]); + g->error_cb = old_error_cb; + + if (arch) { + /* String will be owned by handle, freed by + * guestfs___free_inspect_info. + */ + fs->arch = arch; + break; + } + } + } +} + +/* Try several methods to determine the hostname from a Linux or + * FreeBSD guest. Note that type and distro have been set, so we can + * use that information to direct the search. + */ +static int +check_hostname_unix (guestfs_h *g, struct inspect_fs *fs) +{ + switch (fs->type) { + case OS_TYPE_LINUX: + /* Red Hat-derived would be in /etc/sysconfig/network, and + * Debian-derived in the file /etc/hostname. Very old Debian and + * SUSE use /etc/HOSTNAME. It's best to just look for each of + * these files in turn, rather than try anything clever based on + * distro. + */ + if (guestfs_is_file (g, "/etc/HOSTNAME")) { + fs->hostname = guestfs___first_line_of_file (g, "/etc/HOSTNAME"); + if (fs->hostname == NULL) + return -1; + } + else if (guestfs_is_file (g, "/etc/hostname")) { + fs->hostname = guestfs___first_line_of_file (g, "/etc/hostname"); + if (fs->hostname == NULL) + return -1; + } + else if (guestfs_is_file (g, "/etc/sysconfig/network")) { + if (inspect_with_augeas (g, fs, "/etc/sysconfig/network", + check_hostname_redhat) == -1) + return -1; + } + break; + + case OS_TYPE_FREEBSD: + /* /etc/rc.conf contains the hostname, but there is no Augeas lens + * for this file. + */ + if (guestfs_is_file (g, "/etc/rc.conf")) { + if (check_hostname_freebsd (g, fs) == -1) + return -1; + } + break; + + case OS_TYPE_WINDOWS: /* not here, see check_windows_system_registry */ + case OS_TYPE_UNKNOWN: + default: + /* nothing, keep GCC warnings happy */; + } + + return 0; +} + +/* Parse the hostname from /etc/sysconfig/network. This must be called + * from the inspect_with_augeas wrapper. + */ +static int +check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs) +{ + char *hostname; + + hostname = guestfs_aug_get (g, "/files/etc/sysconfig/network/HOSTNAME"); + if (!hostname) + return -1; + + fs->hostname = hostname; /* freed by guestfs___free_inspect_info */ + return 0; +} + +/* Parse the hostname from /etc/rc.conf. On FreeBSD this file + * contains comments, blank lines and: + * hostname="freebsd8.example.com" + * ifconfig_re0="DHCP" + * keymap="uk.iso" + * sshd_enable="YES" + */ +static int +check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs) +{ + const char *filename = "/etc/rc.conf"; + int64_t size; + char **lines; + size_t i; + + /* Don't trust guestfs_read_lines not to break with very large files. + * Check the file size is something reasonable first. + */ + size = guestfs_filesize (g, filename); + if (size == -1) + /* guestfs_filesize failed and has already set error in handle */ + return -1; + if (size > MAX_SMALL_FILE_SIZE) { + error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), + filename, size); + return -1; + } + + lines = guestfs_read_lines (g, filename); + if (lines == NULL) + return -1; + + for (i = 0; lines[i] != NULL; ++i) { + if (STRPREFIX (lines[i], "hostname=\"") || + STRPREFIX (lines[i], "hostname='")) { + size_t len = strlen (lines[i]) - 10 - 1; + fs->hostname = safe_strndup (g, &lines[i][10], len); + break; + } else if (STRPREFIX (lines[i], "hostname=")) { + size_t len = strlen (lines[i]) - 9; + fs->hostname = safe_strndup (g, &lines[i][9], len); + break; + } + } + + guestfs___free_string_list (lines); + return 0; +} + +static int +check_fstab (guestfs_h *g, struct inspect_fs *fs) +{ + char **lines = guestfs_aug_ls (g, "/files/etc/fstab"); + if (lines == NULL) + return -1; + + if (lines[0] == NULL) { + error (g, _("could not parse /etc/fstab or empty file")); + guestfs___free_string_list (lines); + return -1; + } + + size_t i; + char augpath[256]; + for (i = 0; lines[i] != NULL; ++i) { + /* Ignore comments. Only care about sequence lines which + * match m{/\d+$}. + */ + if (match (g, lines[i], re_aug_seq)) { + snprintf (augpath, sizeof augpath, "%s/spec", lines[i]); + char *spec = guestfs_aug_get (g, augpath); + if (spec == NULL) { + guestfs___free_string_list (lines); + return -1; + } + + snprintf (augpath, sizeof augpath, "%s/file", lines[i]); + char *mp = guestfs_aug_get (g, augpath); + if (mp == NULL) { + guestfs___free_string_list (lines); + free (spec); + return -1; + } + + int r = add_fstab_entry (g, fs, spec, mp); + free (spec); + free (mp); + + if (r == -1) { + guestfs___free_string_list (lines); + return -1; + } + } + } + + guestfs___free_string_list (lines); + return 0; +} + +/* Add a filesystem and possibly a mountpoint entry for + * the root filesystem 'fs'. + * + * 'spec' is the fstab spec field, which might be a device name or a + * pseudodevice or 'UUID=...' or 'LABEL=...'. + * + * 'mp' is the mount point, which could also be 'swap' or 'none'. + */ +static int +add_fstab_entry (guestfs_h *g, struct inspect_fs *fs, + const char *spec, const char *mp) +{ + /* Ignore certain mountpoints. */ + if (STRPREFIX (mp, "/dev/") || + STREQ (mp, "/dev") || + STRPREFIX (mp, "/media/") || + STRPREFIX (mp, "/proc/") || + STREQ (mp, "/proc") || + STRPREFIX (mp, "/selinux/") || + STREQ (mp, "/selinux") || + STRPREFIX (mp, "/sys/") || + STREQ (mp, "/sys")) + return 0; + + /* Ignore /dev/fd (floppy disks) (RHBZ#642929) and CD-ROM drives. */ + if ((STRPREFIX (spec, "/dev/fd") && c_isdigit (spec[7])) || + STREQ (spec, "/dev/floppy") || + STREQ (spec, "/dev/cdrom")) + return 0; + + /* Resolve UUID= and LABEL= to the actual device. */ + char *device = NULL; + if (STRPREFIX (spec, "UUID=")) + device = guestfs_findfs_uuid (g, &spec[5]); + else if (STRPREFIX (spec, "LABEL=")) + device = guestfs_findfs_label (g, &spec[6]); + /* Ignore "/.swap" (Pardus) and pseudo-devices like "tmpfs". */ + else if (STRPREFIX (spec, "/dev/")) + /* Resolve guest block device names. */ + device = resolve_fstab_device (g, spec); + + /* If we haven't resolved the device successfully by this point, + * we don't care, just ignore it. + */ + if (device == NULL) + return 0; + + char *mountpoint = safe_strdup (g, mp); + + /* Add this to the fstab entry in 'fs'. + * Note these are further filtered by guestfs_inspect_get_mountpoints + * and guestfs_inspect_get_filesystems. + */ + size_t n = fs->nr_fstab + 1; + struct inspect_fstab_entry *p; + + p = realloc (fs->fstab, n * sizeof (struct inspect_fstab_entry)); + if (p == NULL) { + perrorf (g, "realloc"); + free (device); + free (mountpoint); + return -1; + } + + fs->fstab = p; + fs->nr_fstab = n; + + /* These are owned by the handle and freed by guestfs___free_inspect_info. */ + fs->fstab[n-1].device = device; + fs->fstab[n-1].mountpoint = mountpoint; + + debug (g, "fstab: device=%s mountpoint=%s", device, mountpoint); + + return 0; +} + +/* Resolve block device name to the libguestfs device name, eg. + * /dev/xvdb1 => /dev/vdb1; and /dev/mapper/VG-LV => /dev/VG/LV. This + * assumes that disks were added in the same order as they appear to + * the real VM, which is a reasonable assumption to make. Return + * anything we don't recognize unchanged. + */ +static char * +resolve_fstab_device (guestfs_h *g, const char *spec) +{ + char *a1; + char *device = NULL; + char *bsddisk, *bsdslice, *bsdpart; + + if (STRPREFIX (spec, "/dev/mapper/")) { + /* LVM2 does some strange munging on /dev/mapper paths for VGs and + * LVs which contain '-' character: + * + * > lvcreate LV--test VG--test 32 + * > debug ls /dev/mapper + * VG----test-LV----test + * + * This makes it impossible to reverse those paths directly, so + * we have implemented lvm_canonical_lv_name in the daemon. + */ + device = guestfs_lvm_canonical_lv_name (g, spec); + } + else if ((a1 = match1 (g, spec, re_xdev)) != NULL) { + char **devices = guestfs_list_devices (g); + if (devices == NULL) + return NULL; + + size_t count; + for (count = 0; devices[count] != NULL; count++) + ; + + size_t i = a1[0] - 'a'; /* a1[0] is always [a-z] because of regex. */ + if (i < count) { + size_t len = strlen (devices[i]) + strlen (a1) + 16; + device = safe_malloc (g, len); + snprintf (device, len, "%s%s", devices[i], &a1[1]); + } + + free (a1); + guestfs___free_string_list (devices); + } + else if (match3 (g, spec, re_freebsd, &bsddisk, &bsdslice, &bsdpart)) { + /* FreeBSD disks are organized quite differently. See: + * http://www.freebsd.org/doc/handbook/disk-organization.html + * FreeBSD "partitions" are exposed as quasi-extended partitions + * numbered from 5 in Linux. I have no idea what happens when you + * have multiple "slices" (the FreeBSD term for MBR partitions). + */ + int disk = guestfs___parse_unsigned_int (g, bsddisk); + int slice = guestfs___parse_unsigned_int (g, bsdslice); + int part = bsdpart[0] - 'a' /* counting from 0 */; + free (bsddisk); + free (bsdslice); + free (bsdpart); + + if (disk == -1 || disk > 26 || + slice <= 0 || slice > 1 /* > 4 .. see comment above */ || + part < 0 || part >= 26) + goto out; + + device = safe_asprintf (g, "/dev/sd%c%d", disk + 'a', part + 5); + } + + out: + /* Didn't match device pattern, return original spec unchanged. */ + if (device == NULL) + device = safe_strdup (g, spec); + + return device; +} + +/* Call 'f' with Augeas opened and having parsed 'filename' (this file + * must exist). As a security measure, this bails if the file is too + * large for a reasonable configuration file. After the call to 'f' + * Augeas is closed. + */ +static int +inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char *filename, + int (*f) (guestfs_h *, struct inspect_fs *)) +{ + /* Security: Refuse to do this if filename is too large. */ + int64_t size = guestfs_filesize (g, filename); + if (size == -1) + /* guestfs_filesize failed and has already set error in handle */ + return -1; + if (size > MAX_AUGEAS_FILE_SIZE) { + error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"), + filename, size); + return -1; + } + + /* If !feature_available (g, "augeas") then the next call will fail. + * Arguably we might want to fall back to a non-Augeas method in + * this case. + */ + if (guestfs_aug_init (g, "/", 16|32) == -1) + return -1; + + int r = -1; + + /* Tell Augeas to only load one file (thanks Raphaël Pinson). */ + char buf[strlen (filename) + 64]; + snprintf (buf, strlen (filename) + 64, "/augeas/load//incl[. != \"%s\"]", + filename); + if (guestfs_aug_rm (g, buf) == -1) + goto out; + + if (guestfs_aug_load (g) == -1) + goto out; + + r = f (g, fs); + + out: + guestfs_aug_close (g); + + return r; +} + +#endif /* defined(HAVE_PCRE) && defined(HAVE_HIVEX) */ diff --git a/src/inspect_fs_windows.c b/src/inspect_fs_windows.c new file mode 100644 index 0000000..9a2e1fb --- /dev/null +++ b/src/inspect_fs_windows.c @@ -0,0 +1,535 @@ +/* libguestfs + * Copyright (C) 2010-2011 Red Hat Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef HAVE_PCRE +#include +#endif + +#ifdef HAVE_HIVEX +#include +#endif + +#include "c-ctype.h" +#include "ignore-value.h" +#include "xstrtol.h" + +#include "guestfs.h" +#include "guestfs-internal.h" +#include "guestfs-internal-actions.h" +#include "guestfs_protocol.h" + +#if defined(HAVE_PCRE) && defined(HAVE_HIVEX) + +/* Compile all the regular expressions once when the shared library is + * loaded. PCRE is thread safe so we're supposedly OK here if + * multiple threads call into the libguestfs API functions below + * simultaneously. + */ +static pcre *re_windows_version; + +static void compile_regexps (void) __attribute__((constructor)); +static void free_regexps (void) __attribute__((destructor)); + +static void +compile_regexps (void) +{ + const char *err; + int offset; + +#define COMPILE(re,pattern,options) \ + do { \ + re = pcre_compile ((pattern), (options), &err, &offset, NULL); \ + if (re == NULL) { \ + ignore_value (write (2, err, strlen (err))); \ + abort (); \ + } \ + } while (0) + + COMPILE (re_windows_version, "^(\\d+)\\.(\\d+)", 0); +} + +static void +free_regexps (void) +{ + pcre_free (re_windows_version); +} + +static int check_windows_arch (guestfs_h *g, struct inspect_fs *fs); +static int check_windows_software_registry (guestfs_h *g, struct inspect_fs *fs); +static int check_windows_system_registry (guestfs_h *g, struct inspect_fs *fs); +static char *map_registry_disk_blob (guestfs_h *g, const char *blob); + +/* XXX Handling of boot.ini in the Perl version was pretty broken. It + * essentially didn't do anything for modern Windows guests. + * Therefore I've omitted all that code. + */ +int +guestfs___check_windows_root (guestfs_h *g, struct inspect_fs *fs) +{ + fs->type = OS_TYPE_WINDOWS; + fs->distro = OS_DISTRO_WINDOWS; + + /* Try to find Windows systemroot using some common locations. */ + const char *systemroots[] = + { "/windows", "/winnt", "/win32", "/win" }; + size_t i; + char *systemroot = NULL; + for (i = 0; + systemroot == NULL && i < sizeof systemroots / sizeof systemroots[0]; + ++i) { + systemroot = guestfs___case_sensitive_path_silently (g, systemroots[i]); + } + + if (!systemroot) { + error (g, _("cannot resolve Windows %%SYSTEMROOT%%")); + return -1; + } + + debug (g, "windows %%SYSTEMROOT%% = %s", systemroot); + + /* Freed by guestfs___free_inspect_info. */ + fs->windows_systemroot = systemroot; + + if (check_windows_arch (g, fs) == -1) + return -1; + + /* Product name and version. */ + if (check_windows_software_registry (g, fs) == -1) + return -1; + + /* Hostname. */ + if (check_windows_system_registry (g, fs) == -1) + return -1; + + return 0; +} + +static int +check_windows_arch (guestfs_h *g, struct inspect_fs *fs) +{ + size_t len = strlen (fs->windows_systemroot) + 32; + char cmd_exe[len]; + snprintf (cmd_exe, len, "%s/system32/cmd.exe", fs->windows_systemroot); + + char *cmd_exe_path = guestfs___case_sensitive_path_silently (g, cmd_exe); + if (!cmd_exe_path) + return 0; + + char *arch = guestfs_file_architecture (g, cmd_exe_path); + free (cmd_exe_path); + + if (arch) + fs->arch = arch; /* freed by guestfs___free_inspect_info */ + + return 0; +} + +/* At the moment, pull just the ProductName and version numbers from + * the registry. In future there is a case for making many more + * registry fields available to callers. + */ +static int +check_windows_software_registry (guestfs_h *g, struct inspect_fs *fs) +{ + const char *basename = "software"; + char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; + snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", + g->tmpdir, basename); + + size_t len = strlen (fs->windows_systemroot) + 64; + char software[len]; + snprintf (software, len, "%s/system32/config/software", + fs->windows_systemroot); + + char *software_path = guestfs___case_sensitive_path_silently (g, software); + if (!software_path) + /* If the software hive doesn't exist, just accept that we cannot + * find product_name etc. + */ + return 0; + + int ret = -1; + hive_h *h = NULL; + hive_value_h *values = NULL; + + if (guestfs___download_to_tmp (g, software_path, basename, + MAX_REGISTRY_SIZE) == -1) + goto out; + + h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); + if (h == NULL) { + perrorf (g, "hivex_open"); + goto out; + } + + hive_node_h node = hivex_root (h); + const char *hivepath[] = + { "Microsoft", "Windows NT", "CurrentVersion" }; + size_t i; + for (i = 0; + node != 0 && i < sizeof hivepath / sizeof hivepath[0]; + ++i) { + node = hivex_node_get_child (h, node, hivepath[i]); + } + + if (node == 0) { + perrorf (g, "hivex: cannot locate HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"); + goto out; + } + + values = hivex_node_values (h, node); + + for (i = 0; values[i] != 0; ++i) { + char *key = hivex_value_key (h, values[i]); + if (key == NULL) { + perrorf (g, "hivex_value_key"); + goto out; + } + + if (STRCASEEQ (key, "ProductName")) { + fs->product_name = hivex_value_string (h, values[i]); + if (!fs->product_name) { + perrorf (g, "hivex_value_string"); + free (key); + goto out; + } + } + else if (STRCASEEQ (key, "CurrentVersion")) { + char *version = hivex_value_string (h, values[i]); + if (!version) { + perrorf (g, "hivex_value_string"); + free (key); + goto out; + } + char *major, *minor; + if (match2 (g, version, re_windows_version, &major, &minor)) { + fs->major_version = guestfs___parse_unsigned_int (g, major); + free (major); + if (fs->major_version == -1) { + free (minor); + free (key); + free (version); + goto out; + } + fs->minor_version = guestfs___parse_unsigned_int (g, minor); + free (minor); + if (fs->minor_version == -1) { + free (key); + free (version); + goto out; + } + } + + free (version); + } + else if (STRCASEEQ (key, "InstallationType")) { + fs->product_variant = hivex_value_string (h, values[i]); + if (!fs->product_variant) { + perrorf (g, "hivex_value_string"); + free (key); + goto out; + } + } + + free (key); + } + + ret = 0; + + out: + if (h) hivex_close (h); + free (values); + free (software_path); + + return ret; +} + +static int +check_windows_system_registry (guestfs_h *g, struct inspect_fs *fs) +{ + const char *basename = "system"; + char tmpdir_basename[strlen (g->tmpdir) + strlen (basename) + 2]; + snprintf (tmpdir_basename, sizeof tmpdir_basename, "%s/%s", + g->tmpdir, basename); + + size_t len = strlen (fs->windows_systemroot) + 64; + char system[len]; + snprintf (system, len, "%s/system32/config/system", + fs->windows_systemroot); + + char *system_path = guestfs___case_sensitive_path_silently (g, system); + if (!system_path) + /* If the system hive doesn't exist, just accept that we cannot + * find hostname etc. + */ + return 0; + + int ret = -1; + hive_h *h = NULL; + hive_node_h root, node; + hive_value_h value, *values = NULL; + int32_t dword; + size_t i, count; + + if (guestfs___download_to_tmp (g, system_path, basename, + MAX_REGISTRY_SIZE) == -1) + goto out; + + h = hivex_open (tmpdir_basename, g->verbose ? HIVEX_OPEN_VERBOSE : 0); + if (h == NULL) { + perrorf (g, "hivex_open"); + goto out; + } + + root = hivex_root (h); + if (root == 0) { + perrorf (g, "hivex_root"); + goto out; + } + + /* Get the CurrentControlSet. */ + errno = 0; + node = hivex_node_get_child (h, root, "Select"); + if (node == 0) { + if (errno != 0) + perrorf (g, "hivex_node_get_child"); + else + error (g, "hivex: could not locate HKLM\\SYSTEM\\Select"); + goto out; + } + + errno = 0; + value = hivex_node_get_value (h, node, "Current"); + if (value == 0) { + if (errno != 0) + perrorf (g, "hivex_node_get_value"); + else + error (g, "hivex: HKLM\\System\\Select Default entry not found."); + goto out; + } + + /* XXX Should check the type. */ + dword = hivex_value_dword (h, value); + fs->windows_current_control_set = safe_asprintf (g, "ControlSet%03d", dword); + + /* Get the drive mappings. + * This page explains the contents of HKLM\System\MountedDevices: + * http://www.goodells.net/multiboot/partsigs.shtml + */ + errno = 0; + node = hivex_node_get_child (h, root, "MountedDevices"); + if (node == 0) { + if (errno != 0) + perrorf (g, "hivex_node_get_child"); + else + error (g, "hivex: could not locate HKLM\\SYSTEM\\MountedDevices"); + goto out; + } + + values = hivex_node_values (h, node); + + /* Count how many DOS drive letter mappings there are. This doesn't + * ignore removable devices, so it overestimates, but that doesn't + * matter because it just means we'll allocate a few bytes extra. + */ + for (i = count = 0; values[i] != 0; ++i) { + char *key = hivex_value_key (h, values[i]); + if (key == NULL) { + perrorf (g, "hivex_value_key"); + goto out; + } + if (STRCASEEQLEN (key, "\\DosDevices\\", 12) && + c_isalpha (key[12]) && key[13] == ':') + count++; + free (key); + } + + fs->drive_mappings = calloc (2*count + 1, sizeof (char *)); + if (fs->drive_mappings == NULL) { + perrorf (g, "calloc"); + goto out; + } + + for (i = count = 0; values[i] != 0; ++i) { + char *key = hivex_value_key (h, values[i]); + if (key == NULL) { + perrorf (g, "hivex_value_key"); + goto out; + } + if (STRCASEEQLEN (key, "\\DosDevices\\", 12) && + c_isalpha (key[12]) && key[13] == ':') { + /* Get the binary value. Is it a fixed disk? */ + char *blob, *device; + size_t len; + hive_type type; + + blob = hivex_value_value (h, values[i], &type, &len); + if (blob != NULL && type == 3 && len == 12) { + /* Try to map the blob to a known disk and partition. */ + device = map_registry_disk_blob (g, blob); + if (device != NULL) { + fs->drive_mappings[count++] = safe_strndup (g, &key[12], 1); + fs->drive_mappings[count++] = device; + } + } + free (blob); + } + free (key); + } + + /* Get the hostname. */ + const char *hivepath[] = + { fs->windows_current_control_set, "Services", "Tcpip", "Parameters" }; + for (node = root, i = 0; + node != 0 && i < sizeof hivepath / sizeof hivepath[0]; + ++i) { + node = hivex_node_get_child (h, node, hivepath[i]); + } + + if (node == 0) { + perrorf (g, "hivex: cannot locate HKLM\\SYSTEM\\%s\\Services\\Tcpip\\Parameters", + fs->windows_current_control_set); + goto out; + } + + free (values); + values = hivex_node_values (h, node); + + for (i = 0; values[i] != 0; ++i) { + char *key = hivex_value_key (h, values[i]); + if (key == NULL) { + perrorf (g, "hivex_value_key"); + goto out; + } + + if (STRCASEEQ (key, "Hostname")) { + fs->hostname = hivex_value_string (h, values[i]); + if (!fs->hostname) { + perrorf (g, "hivex_value_string"); + free (key); + goto out; + } + } + /* many other interesting fields here ... */ + + free (key); + } + + ret = 0; + + out: + if (h) hivex_close (h); + free (values); + free (system_path); + + return ret; +} + +/* Windows Registry HKLM\SYSTEM\MountedDevices uses a blob of data + * to store partitions. This blob is described here: + * http://www.goodells.net/multiboot/partsigs.shtml + * The following function maps this blob to a libguestfs partition + * name, if possible. + */ +static char * +map_registry_disk_blob (guestfs_h *g, const char *blob) +{ + char **devices = NULL; + struct guestfs_partition_list *partitions = NULL; + char *diskid; + size_t i, j, len; + char *ret = NULL; + uint64_t part_offset; + + /* First 4 bytes are the disk ID. Search all devices to find the + * disk with this disk ID. + */ + devices = guestfs_list_devices (g); + if (devices == NULL) + goto out; + + for (i = 0; devices[i] != NULL; ++i) { + /* Read the disk ID. */ + diskid = guestfs_pread_device (g, devices[i], 4, 0x01b8, &len); + if (diskid == NULL) + continue; + if (len < 4) { + free (diskid); + continue; + } + if (memcmp (diskid, blob, 4) == 0) { /* found it */ + free (diskid); + goto found_disk; + } + free (diskid); + } + goto out; + + found_disk: + /* Next 8 bytes are the offset of the partition in bytes(!) given as + * a 64 bit little endian number. Luckily it's easy to get the + * partition byte offset from guestfs_part_list. + */ + part_offset = le64toh (* (uint64_t *) &blob[4]); + + partitions = guestfs_part_list (g, devices[i]); + if (partitions == NULL) + goto out; + + for (j = 0; j < partitions->len; ++j) { + if (partitions->val[j].part_start == part_offset) /* found it */ + goto found_partition; + } + goto out; + + found_partition: + /* Construct the full device name. */ + ret = safe_asprintf (g, "%s%d", devices[i], partitions->val[j].part_num); + + out: + if (devices) + guestfs___free_string_list (devices); + if (partitions) + guestfs_free_partition_list (partitions); + return ret; +} + +char * +guestfs___case_sensitive_path_silently (guestfs_h *g, const char *path) +{ + guestfs_error_handler_cb old_error_cb = g->error_cb; + g->error_cb = NULL; + char *ret = guestfs_case_sensitive_path (g, path); + g->error_cb = old_error_cb; + return ret; +} + +#endif /* defined(HAVE_PCRE) && defined(HAVE_HIVEX) */