X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=src%2Finspect.c;h=bd6d1895a9bdbabb50c379af6ce38007b47ac94a;hp=d19e23b63c76765a57e0a40fb9fe1aa15c6902d4;hb=e44cf42f362d793c47d892a18a6853d88abd6ecb;hpb=ad4cff2625651bda9de25de9aba96bdf213d0a0a diff --git a/src/inspect.c b/src/inspect.c index d19e23b..bd6d189 100644 --- a/src/inspect.c +++ b/src/inspect.c @@ -26,26 +26,44 @@ #include #include +#ifdef HAVE_PCRE #include -#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_file_elf; -static pcre *re_file_win64; -static pcre *re_elf_ppc64; +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) { @@ -61,220 +79,1597 @@ compile_regexps (void) } \ } while (0) - COMPILE (re_file_elf, - "ELF.*(?:executable|shared object|relocatable), (.+?),", 0); - COMPILE (re_elf_ppc64, "64.*PowerPC", 0); + COMPILE (re_fedora, "Fedora release (\\d+)", 0); + COMPILE (re_rhel_old, + "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+).*Update (\\d+)", 0); + COMPILE (re_rhel, + "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)\\.(\\d+)", 0); + COMPILE (re_rhel_no_minor, + "(?:Red Hat Enterprise Linux|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); } -/* Match a regular expression which contains no captures. Returns - * true if it matches or false if it doesn't. +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); + +char ** +guestfs__inspect_os (guestfs_h *g) +{ + /* Remove any information previously stored in the handle. */ + guestfs___free_inspect_info (g); + + if (guestfs_umount_all (g) == -1) + return NULL; + + /* Iterate over all possible devices. Try to mount each + * (read-only). Examine ones which contain filesystems and add that + * information to the handle. + */ + /* Look to see if any devices directly contain filesystems (RHBZ#590167). */ + char **devices; + devices = guestfs_list_devices (g); + if (devices == NULL) + return NULL; + + size_t i; + for (i = 0; devices[i] != NULL; ++i) { + if (check_for_filesystem_on (g, devices[i]) == -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]) == -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]) == -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); +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 void check_architecture (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_registry (guestfs_h *g, struct inspect_fs *fs); +static char *resolve_windows_path_silently (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 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 -match (guestfs_h *g, const char *str, const pcre *re) +check_for_filesystem_on (guestfs_h *g, const char *device) { - size_t len = strlen (str); - int vec[30], r; + /* 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; - r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]); - if (r == PCRE_ERROR_NOMATCH) - return 0; - if (r != 1) { - /* Internal error -- should not happen. */ - fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", - __FILE__, __func__, r, str); + int is_swap = vfs_type && STREQ (vfs_type, "swap"); + + if (g->verbose) + fprintf (stderr, "check_for_filesystem_on: %s (%s)\n", + device, 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; } - return 1; + /* 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); + + /* Unmount the filesystem. */ + if (guestfs_umount_all (g) == -1) + return -1; + + return r; } -/* Match a regular expression which contains exactly one capture. If - * the string matches, return the capture, otherwise return NULL. The - * caller must free the result. - */ -static char * -match1 (guestfs_h *g, const char *str, const pcre *re) +static int +check_filesystem (guestfs_h *g, const char *device) { - size_t len = strlen (str); - int vec[30], r; + if (extend_fses (g) == -1) + return -1; - r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]); - if (r == PCRE_ERROR_NOMATCH) - return NULL; - if (r != 2) { - /* Internal error -- should not happen. */ - fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", - __FILE__, __func__, r, str); - return NULL; + 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; + 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; + 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? */ + else if (guestfs_is_file (g, "/AUTOEXEC.BAT") > 0 || + guestfs_is_file (g, "/autoexec.bat") > 0 || + guestfs_is_dir (g, "/Program Files") > 0 || + guestfs_is_dir (g, "/WINDOWS") > 0 || + guestfs_is_dir (g, "/Windows") > 0 || + guestfs_is_dir (g, "/windows") > 0 || + guestfs_is_dir (g, "/WIN32") > 0 || + guestfs_is_dir (g, "/Win32") > 0 || + guestfs_is_dir (g, "/WINNT") > 0 || + guestfs_is_file (g, "/boot.ini") > 0 || + guestfs_is_file (g, "/ntldr") > 0) { + fs->is_root = 1; + fs->content = FS_CONTENT_WINDOWS_ROOT; + if (check_windows_root (g, fs) == -1) + return -1; } - return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]); + return 0; } -/* Convert output from 'file' command on ELF files to the canonical - * architecture string. Caller must free the result. - */ -static char * -canonical_elf_arch (guestfs_h *g, const char *elf_arch) -{ - const char *r; - - if (strstr (elf_arch, "Intel 80386")) - r = "i386"; - else if (strstr (elf_arch, "Intel 80486")) - r = "i486"; - else if (strstr (elf_arch, "x86-64")) - r = "x86_64"; - else if (strstr (elf_arch, "AMD x86-64")) - r = "x86_64"; - else if (strstr (elf_arch, "SPARC32")) - r = "sparc"; - else if (strstr (elf_arch, "SPARC V9")) - r = "sparc64"; - else if (strstr (elf_arch, "IA-64")) - r = "ia64"; - else if (match (g, elf_arch, re_elf_ppc64)) - r = "ppc64"; - else if (strstr (elf_arch, "PowerPC")) - r = "ppc"; - else - r = elf_arch; - - char *ret = safe_strdup (g, r); - return ret; +/* 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) +{ + char **product_name = guestfs_head_n (g, 1, release_filename); + if (product_name == NULL) + return -1; + if (product_name[0] == NULL) { + error (g, _("%s: file is empty"), release_filename); + guestfs___free_string_list (product_name); + return -1; + } + + /* Note that this string becomes owned by the handle and will + * be freed by guestfs___free_inspect_info. + */ + fs->product_name = product_name[0]; + free (product_name); + + return 0; } +/* Parse generic MAJOR.MINOR from the fs->product_name string. */ static int -is_regular_file (const char *filename) +parse_major_minor (guestfs_h *g, struct inspect_fs *fs) { - struct stat statbuf; + char *major, *minor; - return lstat (filename, &statbuf) == 0 && S_ISREG (statbuf.st_mode); + 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; } -/* Download and uncompress the cpio file to find binaries within. - * Notes: - * (1) Two lists must be identical. - * (2) Implicit limit of 31 bytes for length of each element (see code - * below). +/* 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 + * In theory other distros could have this LSB file, but none do. */ -#define INITRD_BINARIES1 "bin/ls bin/rm bin/modprobe sbin/modprobe bin/sh bin/bash bin/dash bin/nash" -#define INITRD_BINARIES2 {"bin/ls", "bin/rm", "bin/modprobe", "sbin/modprobe", "bin/sh", "bin/bash", "bin/dash", "bin/nash"} +static int +parse_lsb_release (guestfs_h *g, struct inspect_fs *fs) +{ + char **lines; + size_t i; + int r = 0; -static char * -cpio_arch (guestfs_h *g, const char *file, const char *path) + lines = guestfs_head_n (g, 10, "/etc/lsb-release"); + 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 (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) { - char *ret = NULL; + int r; - const char *method; - if (strstr (file, "gzip")) - method = "zcat"; - else if (strstr (file, "bzip2")) - method = "bzcat"; - else - method = "cat"; + fs->type = OS_TYPE_LINUX; - char dir[] = "/tmp/initrd.XXXXXX"; -#define dir_len (sizeof dir) - if (mkdtemp (dir) == NULL) { - perrorf (g, "mkdtemp"); - goto out; + 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; } - char dir_initrd[dir_len + 16]; - snprintf (dir_initrd, dir_len + 16, "%s/initrd", dir); - if (guestfs_download (g, path, dir_initrd) == -1) - goto out; + if (guestfs_exists (g, "/etc/redhat-release") > 0) { + fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */ - char cmd[dir_len + 256]; - snprintf (cmd, dir_len + 256, - "cd %s && %s initrd | cpio --quiet -id " INITRD_BINARIES1, - dir, method); - int r = system (cmd); - if (r == -1 || WEXITSTATUS (r) != 0) { - perrorf (g, "cpio command failed"); - goto out; + 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; + } + + 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 (check_fstab (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) +{ + int r; + + 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; } - char bin[dir_len + 32]; - const char *bins[] = INITRD_BINARIES2; + /* Determine the architecture. */ + check_architecture (g, fs); + + /* We already know /etc/fstab exists because it's part of the test above. */ + if (check_fstab (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 bins / sizeof bins[0]; ++i) { - snprintf (bin, dir_len + 32, "%s/%s", dir, bins[i]); - if (is_regular_file (bin)) { - int flags = g->verbose ? MAGIC_DEBUG : 0; - flags |= MAGIC_ERROR | MAGIC_RAW; + 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; - magic_t m = magic_open (flags); - if (m == NULL) { - perrorf (g, "magic_open"); - goto out; + if (arch) { + /* String will be owned by handle, freed by + * guestfs___free_inspect_info. + */ + fs->arch = arch; + break; } + } + } +} - if (magic_load (m, NULL) == -1) { - perrorf (g, "magic_load: default magic database file"); - magic_close (m); - goto out; +static int check_fstab_aug_open (guestfs_h *g, struct inspect_fs *fs); + +static int +check_fstab (guestfs_h *g, struct inspect_fs *fs) +{ + int r; + int64_t size; + + /* Security: Refuse to do this if /etc/fstab is huge. */ + size = guestfs_filesize (g, "/etc/fstab"); + if (size == -1 || size > 100000) { + error (g, _("size of /etc/fstab unreasonable (%" PRIi64 " bytes)"), size); + return -1; + } + + /* XXX What if !feature_available (g, "augeas")? */ + if (guestfs_aug_init (g, "/", 16|32) == -1) + return -1; + + /* Tell Augeas to only load /etc/fstab (thanks Raphaël Pinson). */ + guestfs_aug_rm (g, "/augeas/load//incl[. != \"/etc/fstab\"]"); + guestfs_aug_load (g); + + r = check_fstab_aug_open (g, fs); + guestfs_aug_close (g); + if (r == -1) + return -1; + + return 0; +} + +static int +check_fstab_aug_open (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; } - const char *line = magic_file (m, bin); - if (line == NULL) { - perrorf (g, "magic_file: %s", bin); - magic_close (m); - goto out; + 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; } - char *elf_arch; - if ((elf_arch = match1 (g, line, re_file_elf)) != NULL) { - ret = canonical_elf_arch (g, elf_arch); - free (elf_arch); - magic_close (m); - goto out; + int r = add_fstab_entry (g, fs, spec, mp); + free (spec); + free (mp); + + if (r == -1) { + guestfs___free_string_list (lines); + return -1; } - magic_close (m); } } - error (g, "file_architecture: could not determine architecture of cpio archive"); - out: - /* Free up the temporary directory. Note the directory name cannot - * contain shell meta-characters because of the way it was - * constructed above. + 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. */ - snprintf (cmd, dir_len + 256, "rm -rf %s", dir); - ignore_value (system (cmd)); + if (device == NULL) + return 0; - return ret; -#undef dir_len + 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; + + if (g->verbose) + fprintf (stderr, "fstab: device=%s mountpoint=%s\n", device, mountpoint); + + return 0; } -char * -guestfs__file_architecture (guestfs_h *g, const char *path) +/* 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 *file = NULL; - char *elf_arch = NULL; - char *ret = NULL; + char *a1; + char *device = NULL; + char *bsddisk, *bsdslice, *bsdpart; - /* Get the output of the "file" command. Note that because this - * runs in the daemon, LANG=C so it's in English. - */ - file = guestfs_file (g, path); - if (file == NULL) - return NULL; + 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 = resolve_windows_path_silently (g, systemroots[i]); + } + + if (!systemroot) { + error (g, _("cannot resolve Windows %%SYSTEMROOT%%")); + return -1; + } + + if (g->verbose) + fprintf (stderr, "windows %%SYSTEMROOT%% = %s", systemroot); + + /* Freed by guestfs___free_inspect_info. */ + fs->windows_systemroot = systemroot; + + if (check_windows_arch (g, fs) == -1) + return -1; + + if (check_windows_registry (g, fs) == -1) + return -1; + + check_package_format (g, fs); + check_package_management (g, fs); + + 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 = resolve_windows_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 ((elf_arch = match1 (g, file, re_file_elf)) != NULL) - ret = canonical_elf_arch (g, elf_arch); - else if (strstr (file, "PE32 executable")) - ret = safe_strdup (g, "i386"); - else if (strstr (file, "PE32+ executable")) - ret = safe_strdup (g, "x86_64"); - else if (strstr (file, "cpio archive")) - ret = cpio_arch (g, file, path); - else - error (g, "file_architecture: unknown architecture: %s", path); - - free (file); - free (elf_arch); - return ret; /* caller frees */ + 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_registry (guestfs_h *g, struct inspect_fs *fs) +{ + TMP_TEMPLATE_ON_STACK (dir); +#define dir_len (strlen (dir)) +#define software_hive_len (dir_len + 16) + char software_hive[software_hive_len]; +#define cmd_len (dir_len + 16) + char cmd[cmd_len]; + + size_t len = strlen (fs->windows_systemroot) + 64; + char software[len]; + snprintf (software, len, "%s/system32/config/software", + fs->windows_systemroot); + + char *software_path = resolve_windows_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; + + /* Security: Refuse to download registry if it is huge. */ + int64_t size = guestfs_filesize (g, software_path); + if (size == -1 || size > 100000000) { + error (g, _("size of %s unreasonable (%" PRIi64 " bytes)"), + software_path, size); + goto out; + } + + if (mkdtemp (dir) == NULL) { + perrorf (g, "mkdtemp"); + goto out; + } + + snprintf (software_hive, software_hive_len, "%s/software", dir); + + if (guestfs_download (g, software_path, software_hive) == -1) + goto out; + + h = hivex_open (software_hive, 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); + return -1; + } + } + + free (version); + } + + free (key); + } + + ret = 0; + + out: + if (h) hivex_close (h); + free (values); + free (software_path); + + /* Free up the temporary directory. Note the directory name cannot + * contain shell meta-characters because of the way it was + * constructed above. + */ + snprintf (cmd, cmd_len, "rm -rf %s", dir); + ignore_value (system (cmd)); +#undef dir_len +#undef software_hive_len +#undef cmd_len + + return ret; +} + +static char * +resolve_windows_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 +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; +} + +/* 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: + fs->package_format = OS_PACKAGE_FORMAT_RPM; + break; + + case OS_DISTRO_DEBIAN: + case OS_DISTRO_UBUNTU: + 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_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: + 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_WINDOWS: + case OS_DISTRO_UNKNOWN: + default: + fs->package_management = OS_PACKAGE_MANAGEMENT_UNKNOWN; + break; + } +} + +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")); + 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; + } + + error (g, _("%s: root device not found: only call this function with a root device previously returned by guestfs_inspect_os"), + root); + return NULL; +} + +char ** +guestfs__inspect_get_roots (guestfs_h *g) +{ + /* NB. Doesn't matter if g->nr_fses == 0. We just return an empty + * list in this case. + */ + + size_t i; + size_t count = 0; + for (i = 0; i < g->nr_fses; ++i) + if (g->fses[i].is_root) + count++; + + char **ret = calloc (count+1, sizeof (char *)); + if (ret == NULL) { + perrorf (g, "calloc"); + return NULL; + } + + count = 0; + for (i = 0; i < g->nr_fses; ++i) { + if (g->fses[i].is_root) { + ret[count] = safe_strdup (g, g->fses[i].device); + count++; + } + } + ret[count] = NULL; + + return ret; +} + +char * +guestfs__inspect_get_type (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char *ret; + switch (fs->type) { + case OS_TYPE_LINUX: ret = safe_strdup (g, "linux"); break; + case OS_TYPE_WINDOWS: ret = safe_strdup (g, "windows"); break; + case OS_TYPE_FREEBSD: ret = safe_strdup (g, "freebsd"); break; + case OS_TYPE_UNKNOWN: default: ret = safe_strdup (g, "unknown"); break; + } + + return ret; +} + +char * +guestfs__inspect_get_arch (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + return safe_strdup (g, fs->arch ? : "unknown"); +} + +char * +guestfs__inspect_get_distro (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char *ret; + switch (fs->distro) { + case OS_DISTRO_ARCHLINUX: ret = safe_strdup (g, "archlinux"); break; + case OS_DISTRO_DEBIAN: ret = safe_strdup (g, "debian"); break; + case OS_DISTRO_FEDORA: ret = safe_strdup (g, "fedora"); break; + case OS_DISTRO_GENTOO: ret = safe_strdup (g, "gentoo"); break; + case OS_DISTRO_MEEGO: ret = safe_strdup (g, "meego"); break; + case OS_DISTRO_PARDUS: ret = safe_strdup (g, "pardus"); break; + case OS_DISTRO_REDHAT_BASED: ret = safe_strdup (g, "redhat-based"); break; + case OS_DISTRO_RHEL: ret = safe_strdup (g, "rhel"); break; + case OS_DISTRO_WINDOWS: ret = safe_strdup (g, "windows"); break; + case OS_DISTRO_UBUNTU: ret = safe_strdup (g, "ubuntu"); break; + case OS_DISTRO_UNKNOWN: default: ret = safe_strdup (g, "unknown"); break; + } + + return ret; +} + +int +guestfs__inspect_get_major_version (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return -1; + + return fs->major_version; +} + +int +guestfs__inspect_get_minor_version (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return -1; + + return fs->minor_version; +} + +char * +guestfs__inspect_get_product_name (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + return safe_strdup (g, fs->product_name ? : "unknown"); +} + +char * +guestfs__inspect_get_windows_systemroot (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + if (!fs->windows_systemroot) { + error (g, _("not a Windows guest, or systemroot could not be determined")); + return NULL; + } + + return safe_strdup (g, fs->windows_systemroot); +} + +char ** +guestfs__inspect_get_mountpoints (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char **ret; + + /* If no fstab information (Windows) return just the root. */ + if (fs->nr_fstab == 0) { + ret = calloc (3, sizeof (char *)); + ret[0] = safe_strdup (g, "/"); + ret[1] = safe_strdup (g, root); + ret[2] = NULL; + return ret; + } + +#define CRITERION fs->fstab[i].mountpoint[0] == '/' + size_t i, count = 0; + for (i = 0; i < fs->nr_fstab; ++i) + if (CRITERION) + count++; + + /* Hashtables have 2N+1 entries. */ + ret = calloc (2*count+1, sizeof (char *)); + if (ret == NULL) { + perrorf (g, "calloc"); + return NULL; + } + + count = 0; + for (i = 0; i < fs->nr_fstab; ++i) + if (CRITERION) { + ret[2*count] = safe_strdup (g, fs->fstab[i].mountpoint); + ret[2*count+1] = safe_strdup (g, fs->fstab[i].device); + count++; + } +#undef CRITERION + + return ret; +} + +char ** +guestfs__inspect_get_filesystems (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char **ret; + + /* If no fstab information (Windows) return just the root. */ + if (fs->nr_fstab == 0) { + ret = calloc (2, sizeof (char *)); + ret[0] = safe_strdup (g, root); + ret[1] = NULL; + return ret; + } + + ret = calloc (fs->nr_fstab + 1, sizeof (char *)); + if (ret == NULL) { + perrorf (g, "calloc"); + return NULL; + } + + size_t i; + for (i = 0; i < fs->nr_fstab; ++i) + ret[i] = safe_strdup (g, fs->fstab[i].device); + + return ret; +} + +char * +guestfs__inspect_get_package_format (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char *ret; + switch (fs->package_format) { + case OS_PACKAGE_FORMAT_RPM: ret = safe_strdup (g, "rpm"); break; + case OS_PACKAGE_FORMAT_DEB: ret = safe_strdup (g, "deb"); break; + case OS_PACKAGE_FORMAT_PACMAN: ret = safe_strdup (g, "pacman"); break; + case OS_PACKAGE_FORMAT_EBUILD: ret = safe_strdup (g, "ebuild"); break; + case OS_PACKAGE_FORMAT_PISI: ret = safe_strdup (g, "pisi"); break; + case OS_PACKAGE_FORMAT_UNKNOWN: + default: + ret = safe_strdup (g, "unknown"); + break; + } + + return ret; +} + +char * +guestfs__inspect_get_package_management (guestfs_h *g, const char *root) +{ + struct inspect_fs *fs = search_for_root (g, root); + if (!fs) + return NULL; + + char *ret; + switch (fs->package_management) { + case OS_PACKAGE_MANAGEMENT_YUM: ret = safe_strdup (g, "yum"); break; + case OS_PACKAGE_MANAGEMENT_UP2DATE: ret = safe_strdup (g, "up2date"); break; + case OS_PACKAGE_MANAGEMENT_APT: ret = safe_strdup (g, "apt"); break; + case OS_PACKAGE_MANAGEMENT_PACMAN: ret = safe_strdup (g, "pacman"); break; + case OS_PACKAGE_MANAGEMENT_PORTAGE: ret = safe_strdup (g, "portage"); break; + case OS_PACKAGE_MANAGEMENT_PISI: ret = safe_strdup (g, "pisi"); break; + case OS_PACKAGE_MANAGEMENT_UNKNOWN: + default: + ret = safe_strdup (g, "unknown"); + break; + } + + return ret; +} + +#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 + +char ** +guestfs__inspect_os (guestfs_h *g) +{ + NOT_IMPL(NULL); +} + +char ** +guestfs__inspect_get_roots (guestfs_h *g) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_type (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_arch (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_distro (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +int +guestfs__inspect_get_major_version (guestfs_h *g, const char *root) +{ + NOT_IMPL(-1); +} + +int +guestfs__inspect_get_minor_version (guestfs_h *g, const char *root) +{ + NOT_IMPL(-1); +} + +char * +guestfs__inspect_get_product_name (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_windows_systemroot (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char ** +guestfs__inspect_get_mountpoints (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char ** +guestfs__inspect_get_filesystems (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_package_format (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +char * +guestfs__inspect_get_package_management (guestfs_h *g, const char *root) +{ + NOT_IMPL(NULL); +} + +#endif /* no PCRE or hivex at compile time */ + +void +guestfs___free_inspect_info (guestfs_h *g) +{ + size_t i; + for (i = 0; i < g->nr_fses; ++i) { + free (g->fses[i].device); + free (g->fses[i].product_name); + free (g->fses[i].arch); + free (g->fses[i].windows_systemroot); + size_t j; + for (j = 0; j < g->fses[i].nr_fstab; ++j) { + free (g->fses[i].fstab[j].device); + free (g->fses[i].fstab[j].mountpoint); + } + free (g->fses[i].fstab); + } + free (g->fses); + g->nr_fses = 0; + g->fses = NULL; +} + +/* In the Perl code this is a public function. */ +int +guestfs___feature_available (guestfs_h *g, const char *feature) +{ + /* 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; + + const char *groups[] = { feature, NULL }; + int r = guestfs_available (g, (char * const *) groups); + + g->error_cb = old_error_cb; + + return r == 0 ? 1 : 0; +} + +#ifdef HAVE_PCRE + +/* Match a regular expression which contains no captures. Returns + * true if it matches or false if it doesn't. + */ +int +guestfs___match (guestfs_h *g, const char *str, const pcre *re) +{ + size_t len = strlen (str); + int vec[30], r; + + r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]); + if (r == PCRE_ERROR_NOMATCH) + return 0; + if (r != 1) { + /* Internal error -- should not happen. */ + fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", + __FILE__, __func__, r, str); + return 0; + } + + return 1; +} + +/* Match a regular expression which contains exactly one capture. If + * the string matches, return the capture, otherwise return NULL. The + * caller must free the result. + */ +char * +guestfs___match1 (guestfs_h *g, const char *str, const pcre *re) +{ + size_t len = strlen (str); + int vec[30], r; + + r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]); + if (r == PCRE_ERROR_NOMATCH) + return NULL; + if (r != 2) { + /* Internal error -- should not happen. */ + fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", + __FILE__, __func__, r, str); + return NULL; + } + + return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]); +} + +/* Match a regular expression which contains exactly two captures. */ +int +guestfs___match2 (guestfs_h *g, const char *str, const pcre *re, + char **ret1, char **ret2) +{ + size_t len = strlen (str); + int vec[30], r; + + r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30); + if (r == PCRE_ERROR_NOMATCH) + return 0; + if (r != 3) { + /* Internal error -- should not happen. */ + fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", + __FILE__, __func__, r, str); + return 0; + } + + *ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]); + *ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]); + + return 1; +} + +/* Match a regular expression which contains exactly three captures. */ +int +guestfs___match3 (guestfs_h *g, const char *str, const pcre *re, + char **ret1, char **ret2, char **ret3) +{ + size_t len = strlen (str); + int vec[30], r; + + r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30); + if (r == PCRE_ERROR_NOMATCH) + return 0; + if (r != 4) { + /* Internal error -- should not happen. */ + fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n", + __FILE__, __func__, r, str); + return 0; + } + + *ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]); + *ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]); + *ret3 = safe_strndup (g, &str[vec[6]], vec[7]-vec[6]); + + return 1; +} + +#endif /* HAVE_PCRE */