#include <pcre.h>
#include <magic.h>
+#include <hivex.h>
+#include <augeas.h>
#include "ignore-value.h"
+#include "xstrtol.h"
#include "guestfs.h"
#include "guestfs-internal.h"
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_debian;
+static pcre *re_aug_seq;
+static pcre *re_xdev;
+static pcre *re_windows_version;
static void compile_regexps (void) __attribute__((constructor));
+static void free_regexps (void) __attribute__((destructor));
+
static void
compile_regexps (void)
{
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_debian, "(\\d+)\\.(\\d+)", 0);
+ COMPILE (re_aug_seq, "/\\d+$", 0);
+ COMPILE (re_xdev, "^/dev/(?:h|s|v|xv)d([a-z]\\d*)$", 0);
+ COMPILE (re_windows_version, "^(\\d+)\\.(\\d+)", 0);
+}
+
+static void
+free_regexps (void)
+{
+ pcre_free (re_file_elf);
+ pcre_free (re_file_win64);
+ pcre_free (re_elf_ppc64);
+ pcre_free (re_fedora);
+ pcre_free (re_rhel_old);
+ pcre_free (re_rhel);
+ pcre_free (re_rhel_no_minor);
+ pcre_free (re_debian);
+ pcre_free (re_aug_seq);
+ pcre_free (re_xdev);
+ pcre_free (re_windows_version);
}
/* Match a regular expression which contains no captures. Returns
return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
}
+/* Match a regular expression which contains exactly two captures. */
+static int
+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;
+}
+
/* Convert output from 'file' command on ELF files to the canonical
* architecture string. Caller must free the result.
*/
static char *
cpio_arch (guestfs_h *g, const char *file, const char *path)
{
+ TMP_TEMPLATE_ON_STACK (dir);
+#define dir_len (strlen (dir))
+#define initrd_len (dir_len + 16)
+ char initrd[initrd_len];
+#define cmd_len (dir_len + 256)
+ char cmd[cmd_len];
+#define bin_len (dir_len + 32)
+ char bin[bin_len];
+
char *ret = NULL;
const char *method;
else
method = "cat";
- char dir[] = "/tmp/initrd.XXXXXX";
-#define dir_len (sizeof dir)
if (mkdtemp (dir) == NULL) {
perrorf (g, "mkdtemp");
goto out;
}
- char dir_initrd[dir_len + 16];
- snprintf (dir_initrd, dir_len + 16, "%s/initrd", dir);
- if (guestfs_download (g, path, dir_initrd) == -1)
+ snprintf (initrd, initrd_len, "%s/initrd", dir);
+ if (guestfs_download (g, path, initrd) == -1)
goto out;
- char cmd[dir_len + 256];
- snprintf (cmd, dir_len + 256,
+ snprintf (cmd, cmd_len,
"cd %s && %s initrd | cpio --quiet -id " INITRD_BINARIES1,
dir, method);
int r = system (cmd);
goto out;
}
- char bin[dir_len + 32];
const char *bins[] = INITRD_BINARIES2;
size_t i;
for (i = 0; i < sizeof bins / sizeof bins[0]; ++i) {
- snprintf (bin, dir_len + 32, "%s/%s", dir, bins[i]);
+ snprintf (bin, bin_len, "%s/%s", dir, bins[i]);
if (is_regular_file (bin)) {
int flags = g->verbose ? MAGIC_DEBUG : 0;
* contain shell meta-characters because of the way it was
* constructed above.
*/
- snprintf (cmd, dir_len + 256, "rm -rf %s", dir);
+ snprintf (cmd, cmd_len, "rm -rf %s", dir);
ignore_value (system (cmd));
return ret;
#undef dir_len
+#undef initrd_len
+#undef cmd_len
+#undef bin_len
}
char *
free (elf_arch);
return ret; /* caller frees */
}
+
+/* The main inspection code. */
+static int feature_available (guestfs_h *g, const char *feature);
+static void free_string_list (char **);
+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) {
+ free_string_list (devices);
+ guestfs___free_inspect_info (g);
+ return NULL;
+ }
+ }
+ 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) {
+ free_string_list (partitions);
+ guestfs___free_inspect_info (g);
+ return NULL;
+ }
+ }
+ free_string_list (partitions);
+
+ /* Look at all LVs. */
+ if (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) {
+ free_string_list (lvs);
+ guestfs___free_inspect_info (g);
+ return NULL;
+ }
+ }
+ 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.
+ */
+ 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");
+ guestfs___free_inspect_info (g);
+ 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;
+}
+
+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);
+ 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;
+}
+
+static void
+free_string_list (char **argv)
+{
+ size_t i;
+ for (i = 0; argv[i] != NULL; ++i)
+ free (argv[i]);
+ free (argv);
+}
+
+/* In the Perl code this is a public function. */
+static int
+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;
+}
+
+/* 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_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,
+ const char *systemroot);
+static int check_windows_registry (guestfs_h *g, struct inspect_fs *fs,
+ const char *systemroot);
+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 int
+check_for_filesystem_on (guestfs_h *g, const char *device)
+{
+ /* 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");
+
+ 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;
+ }
+
+ /* 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;
+}
+
+static int
+check_filesystem (guestfs_h *g, const char *device)
+{
+ 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;
+
+ /* 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;
+ /* Linux root? */
+ else if (guestfs_is_dir (g, "/etc") > 0 &&
+ guestfs_is_dir (g, "/bin") > 0 &&
+ 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 (guestfs_is_dir (g, "/etc") > 0 &&
+ guestfs_is_dir (g, "/bin") > 0 &&
+ guestfs_is_dir (g, "/share") > 0 &&
+ guestfs_exists (g, "/local") == 0 &&
+ guestfs_is_file (g, "/etc/fstab") == 0)
+ fs->content = FS_CONTENT_LINUX_USR_LOCAL;
+ /* Linux /usr? */
+ else if (guestfs_is_dir (g, "/etc") > 0 &&
+ guestfs_is_dir (g, "/bin") > 0 &&
+ guestfs_is_dir (g, "/share") > 0 &&
+ 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 0;
+}
+
+/* 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)
+{
+ fs->type = OS_TYPE_LINUX;
+
+ if (guestfs_exists (g, "/etc/redhat-release") > 0) {
+ fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */
+
+ char **product_name = guestfs_head_n (g, 1, "/etc/redhat-release");
+ if (product_name == NULL)
+ return -1;
+ if (product_name[0] == NULL) {
+ error (g, "/etc/redhat-release file is empty");
+ 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);
+
+ 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;
+
+ char **product_name = guestfs_head_n (g, 1, "/etc/debian_version");
+ if (product_name == NULL)
+ return -1;
+ if (product_name[0] == NULL) {
+ error (g, "/etc/debian_version file is empty");
+ 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);
+
+ char *major, *minor;
+ if (match2 (g, fs->product_name, re_debian, &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;
+ }
+ }
+
+ /* Determine the architecture. */
+ 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;
+ }
+ }
+ }
+
+ /* 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.
+ * XXX What if !feature_available (g, "augeas")?
+ */
+ if (guestfs_aug_init (g, "/", AUG_NO_LOAD|AUG_SAVE_NOOP) == -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);
+
+ int r = check_fstab (g, fs);
+ guestfs_aug_close (g);
+ if (r == -1)
+ return -1;
+
+ 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");
+ 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) {
+ free_string_list (lines);
+ return -1;
+ }
+
+ snprintf (augpath, sizeof augpath, "%s/file", lines[i]);
+ char *mp = guestfs_aug_get (g, augpath);
+ if (mp == NULL) {
+ free_string_list (lines);
+ free (spec);
+ return -1;
+ }
+
+ int r = add_fstab_entry (g, fs, spec, mp);
+ free (spec);
+ free (mp);
+
+ if (r == -1) {
+ free_string_list (lines);
+ return -1;
+ }
+ }
+ }
+
+ 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;
+
+ /* 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]);
+ /* Resolve guest block device names. */
+ else if (spec[0] == '/')
+ device = resolve_fstab_device (g, spec);
+ /* Also ignore pseudo-devices completely, like spec == "tmpfs".
+ * 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;
+
+ if (g->verbose)
+ fprintf (stderr, "fstab: device=%s mountpoint=%s\n", 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;
+
+ if (STRPREFIX (spec, "/dev/mapper/")) {
+ /* LVM2 does some strange munging on /dev/mapper paths for VGs and
+ * LVs which contain '-' character:
+ *
+ * ><fs> lvcreate LV--test VG--test 32
+ * ><fs> 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);
+ free_string_list (devices);
+ }
+ else {
+ /* Didn't match device pattern, return original spec unchanged. */
+ 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;
+ }
+
+ /* XXX There is a case for exposing systemroot and many variables
+ * from the registry through the libguestfs API.
+ */
+
+ if (g->verbose)
+ fprintf (stderr, "windows %%SYSTEMROOT%% = %s", systemroot);
+
+ if (check_windows_arch (g, fs, systemroot) == -1) {
+ free (systemroot);
+ return -1;
+ }
+
+ if (check_windows_registry (g, fs, systemroot) == -1) {
+ free (systemroot);
+ return -1;
+ }
+
+ free (systemroot);
+ return 0;
+}
+
+static int
+check_windows_arch (guestfs_h *g, struct inspect_fs *fs,
+ const char *systemroot)
+{
+ size_t len = strlen (systemroot) + 32;
+ char cmd_exe[len];
+ snprintf (cmd_exe, len, "%s/system32/cmd.exe", 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 (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,
+ const char *systemroot)
+{
+ 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 (systemroot) + 64;
+ char software[len];
+ snprintf (software, len, "%s/system32/config/software", 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;
+
+ 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;
+}
+
+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_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_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_DEBIAN: ret = safe_strdup (g, "debian"); break;
+ case OS_DISTRO_FEDORA: ret = safe_strdup (g, "fedora"); 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_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_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;
+}
+
+/* List filesystems.
+ *
+ * The current implementation just uses guestfs_vfs_type and doesn't
+ * try mounting anything, but we reserve the right in future to try
+ * mounting filesystems.
+ */
+
+static void remove_from_list (char **list, const char *item);
+static void check_with_vfs_type (guestfs_h *g, const char *dev, char ***ret, size_t *ret_size);
+
+char **
+guestfs__list_filesystems (guestfs_h *g)
+{
+ size_t i;
+ char **ret;
+ size_t ret_size;
+
+ ret = safe_malloc (g, sizeof (char *));
+ ret[0] = NULL;
+ ret_size = 0;
+
+ /* Look to see if any devices directly contain filesystems
+ * (RHBZ#590167). However vfs-type will fail to tell us anything
+ * useful about devices which just contain partitions, so we also
+ * get the list of partitions and exclude the corresponding devices
+ * by using part-to-dev.
+ */
+ char **devices;
+ devices = guestfs_list_devices (g);
+ if (devices == NULL) {
+ free_string_list (ret);
+ return NULL;
+ }
+ char **partitions;
+ partitions = guestfs_list_partitions (g);
+ if (partitions == NULL) {
+ free_string_list (devices);
+ free_string_list (ret);
+ return NULL;
+ }
+
+ for (i = 0; partitions[i] != NULL; ++i) {
+ char *dev = guestfs_part_to_dev (g, partitions[i]);
+ if (dev)
+ remove_from_list (devices, dev);
+ free (dev);
+ }
+
+ /* Use vfs-type to check for filesystems on devices. */
+ for (i = 0; devices[i] != NULL; ++i)
+ check_with_vfs_type (g, devices[i], &ret, &ret_size);
+ free_string_list (devices);
+
+ /* Use vfs-type to check for filesystems on partitions. */
+ for (i = 0; partitions[i] != NULL; ++i)
+ check_with_vfs_type (g, partitions[i], &ret, &ret_size);
+ free_string_list (partitions);
+
+ if (feature_available (g, "lvm2")) {
+ /* Use vfs-type to check for filesystems on LVs. */
+ char **lvs;
+ lvs = guestfs_lvs (g);
+ if (lvs == NULL) {
+ free_string_list (ret);
+ return NULL;
+ }
+
+ for (i = 0; lvs[i] != NULL; ++i)
+ check_with_vfs_type (g, lvs[i], &ret, &ret_size);
+ free_string_list (lvs);
+ }
+
+ return ret;
+}
+
+/* If 'item' occurs in 'list', remove and free it. */
+static void
+remove_from_list (char **list, const char *item)
+{
+ size_t i;
+
+ for (i = 0; list[i] != NULL; ++i)
+ if (STREQ (list[i], item)) {
+ free (list[i]);
+ for (; list[i+1] != NULL; ++i)
+ list[i] = list[i+1];
+ list[i] = NULL;
+ return;
+ }
+}
+
+/* Use vfs-type to look for a filesystem of some sort on 'dev'.
+ * Apart from some types which we ignore, add the result to the
+ * 'ret' string list.
+ */
+static void
+check_with_vfs_type (guestfs_h *g, const char *device,
+ char ***ret, size_t *ret_size)
+{
+ char *v;
+
+ 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;
+
+ if (!vfs_type)
+ v = safe_strdup (g, "unknown");
+ else {
+ /* Ignore all "*_member" strings. In libblkid these are returned
+ * for things which are members of some RAID or LVM set, most
+ * importantly "LVM2_member" which is a PV.
+ */
+ size_t n = strlen (vfs_type);
+ if (n >= 7 && STREQ (&vfs_type[n-7], "_member")) {
+ free (vfs_type);
+ return;
+ }
+
+ /* Ignore LUKS-encrypted partitions. These are also containers. */
+ if (STREQ (vfs_type, "crypto_LUKS")) {
+ free (vfs_type);
+ return;
+ }
+
+ v = vfs_type;
+ }
+
+ /* Extend the return array. */
+ size_t i = *ret_size;
+ *ret_size += 2;
+ *ret = safe_realloc (g, *ret, (*ret_size + 1) * sizeof (char *));
+ (*ret)[i] = safe_strdup (g, device);
+ (*ret)[i+1] = v;
+ (*ret)[i+2] = NULL;
+}
git.annexia.org / libguestfs.git / blobdiff