2 * Copyright (C) 2010 Red Hat Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "ignore-value.h"
38 #include "guestfs-internal.h"
39 #include "guestfs-internal-actions.h"
40 #include "guestfs_protocol.h"
42 /* Compile all the regular expressions once when the shared library is
43 * loaded. PCRE is thread safe so we're supposedly OK here if
44 * multiple threads call into the libguestfs API functions below
47 static pcre *re_file_elf;
48 static pcre *re_file_win64;
49 static pcre *re_elf_ppc64;
50 static pcre *re_fedora;
51 static pcre *re_rhel_old;
53 static pcre *re_rhel_no_minor;
54 static pcre *re_major_minor;
55 static pcre *re_aug_seq;
57 static pcre *re_windows_version;
59 static void compile_regexps (void) __attribute__((constructor));
60 static void free_regexps (void) __attribute__((destructor));
63 compile_regexps (void)
68 #define COMPILE(re,pattern,options) \
70 re = pcre_compile ((pattern), (options), &err, &offset, NULL); \
72 ignore_value (write (2, err, strlen (err))); \
78 "ELF.*(?:executable|shared object|relocatable), (.+?),", 0);
79 COMPILE (re_elf_ppc64, "64.*PowerPC", 0);
80 COMPILE (re_fedora, "Fedora release (\\d+)", 0);
82 "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+).*Update (\\d+)", 0);
84 "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)\\.(\\d+)", 0);
85 COMPILE (re_rhel_no_minor,
86 "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)", 0);
87 COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0);
88 COMPILE (re_aug_seq, "/\\d+$", 0);
89 COMPILE (re_xdev, "^/dev/(?:h|s|v|xv)d([a-z]\\d*)$", 0);
90 COMPILE (re_windows_version, "^(\\d+)\\.(\\d+)", 0);
96 pcre_free (re_file_elf);
97 pcre_free (re_file_win64);
98 pcre_free (re_elf_ppc64);
99 pcre_free (re_fedora);
100 pcre_free (re_rhel_old);
102 pcre_free (re_rhel_no_minor);
103 pcre_free (re_major_minor);
104 pcre_free (re_aug_seq);
106 pcre_free (re_windows_version);
109 /* Match a regular expression which contains no captures. Returns
110 * true if it matches or false if it doesn't.
113 match (guestfs_h *g, const char *str, const pcre *re)
115 size_t len = strlen (str);
118 r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
119 if (r == PCRE_ERROR_NOMATCH)
122 /* Internal error -- should not happen. */
123 fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n",
124 __FILE__, __func__, r, str);
131 /* Match a regular expression which contains exactly one capture. If
132 * the string matches, return the capture, otherwise return NULL. The
133 * caller must free the result.
136 match1 (guestfs_h *g, const char *str, const pcre *re)
138 size_t len = strlen (str);
141 r = pcre_exec (re, NULL, str, len, 0, 0, vec, sizeof vec / sizeof vec[0]);
142 if (r == PCRE_ERROR_NOMATCH)
145 /* Internal error -- should not happen. */
146 fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n",
147 __FILE__, __func__, r, str);
151 return safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
154 /* Match a regular expression which contains exactly two captures. */
156 match2 (guestfs_h *g, const char *str, const pcre *re, char **ret1, char **ret2)
158 size_t len = strlen (str);
161 r = pcre_exec (re, NULL, str, len, 0, 0, vec, 30);
162 if (r == PCRE_ERROR_NOMATCH)
165 /* Internal error -- should not happen. */
166 fprintf (stderr, "libguestfs: %s: %s: internal error: pcre_exec returned unexpected error code %d when matching against the string \"%s\"\n",
167 __FILE__, __func__, r, str);
171 *ret1 = safe_strndup (g, &str[vec[2]], vec[3]-vec[2]);
172 *ret2 = safe_strndup (g, &str[vec[4]], vec[5]-vec[4]);
177 /* Convert output from 'file' command on ELF files to the canonical
178 * architecture string. Caller must free the result.
181 canonical_elf_arch (guestfs_h *g, const char *elf_arch)
185 if (strstr (elf_arch, "Intel 80386"))
187 else if (strstr (elf_arch, "Intel 80486"))
189 else if (strstr (elf_arch, "x86-64"))
191 else if (strstr (elf_arch, "AMD x86-64"))
193 else if (strstr (elf_arch, "SPARC32"))
195 else if (strstr (elf_arch, "SPARC V9"))
197 else if (strstr (elf_arch, "IA-64"))
199 else if (match (g, elf_arch, re_elf_ppc64))
201 else if (strstr (elf_arch, "PowerPC"))
206 char *ret = safe_strdup (g, r);
211 is_regular_file (const char *filename)
215 return lstat (filename, &statbuf) == 0 && S_ISREG (statbuf.st_mode);
218 /* Download and uncompress the cpio file to find binaries within.
220 * (1) Two lists must be identical.
221 * (2) Implicit limit of 31 bytes for length of each element (see code
224 #define INITRD_BINARIES1 "bin/ls bin/rm bin/modprobe sbin/modprobe bin/sh bin/bash bin/dash bin/nash"
225 #define INITRD_BINARIES2 {"bin/ls", "bin/rm", "bin/modprobe", "sbin/modprobe", "bin/sh", "bin/bash", "bin/dash", "bin/nash"}
228 cpio_arch (guestfs_h *g, const char *file, const char *path)
230 TMP_TEMPLATE_ON_STACK (dir);
231 #define dir_len (strlen (dir))
232 #define initrd_len (dir_len + 16)
233 char initrd[initrd_len];
234 #define cmd_len (dir_len + 256)
236 #define bin_len (dir_len + 32)
242 if (strstr (file, "gzip"))
244 else if (strstr (file, "bzip2"))
249 if (mkdtemp (dir) == NULL) {
250 perrorf (g, "mkdtemp");
254 snprintf (initrd, initrd_len, "%s/initrd", dir);
255 if (guestfs_download (g, path, initrd) == -1)
258 snprintf (cmd, cmd_len,
259 "cd %s && %s initrd | cpio --quiet -id " INITRD_BINARIES1,
261 int r = system (cmd);
262 if (r == -1 || WEXITSTATUS (r) != 0) {
263 perrorf (g, "cpio command failed");
267 const char *bins[] = INITRD_BINARIES2;
269 for (i = 0; i < sizeof bins / sizeof bins[0]; ++i) {
270 snprintf (bin, bin_len, "%s/%s", dir, bins[i]);
272 if (is_regular_file (bin)) {
273 int flags = g->verbose ? MAGIC_DEBUG : 0;
274 flags |= MAGIC_ERROR | MAGIC_RAW;
276 magic_t m = magic_open (flags);
278 perrorf (g, "magic_open");
282 if (magic_load (m, NULL) == -1) {
283 perrorf (g, "magic_load: default magic database file");
288 const char *line = magic_file (m, bin);
290 perrorf (g, "magic_file: %s", bin);
296 if ((elf_arch = match1 (g, line, re_file_elf)) != NULL) {
297 ret = canonical_elf_arch (g, elf_arch);
305 error (g, "file_architecture: could not determine architecture of cpio archive");
308 /* Free up the temporary directory. Note the directory name cannot
309 * contain shell meta-characters because of the way it was
312 snprintf (cmd, cmd_len, "rm -rf %s", dir);
313 ignore_value (system (cmd));
323 guestfs__file_architecture (guestfs_h *g, const char *path)
326 char *elf_arch = NULL;
329 /* Get the output of the "file" command. Note that because this
330 * runs in the daemon, LANG=C so it's in English.
332 file = guestfs_file (g, path);
336 if ((elf_arch = match1 (g, file, re_file_elf)) != NULL)
337 ret = canonical_elf_arch (g, elf_arch);
338 else if (strstr (file, "PE32 executable"))
339 ret = safe_strdup (g, "i386");
340 else if (strstr (file, "PE32+ executable"))
341 ret = safe_strdup (g, "x86_64");
342 else if (strstr (file, "cpio archive"))
343 ret = cpio_arch (g, file, path);
345 error (g, "file_architecture: unknown architecture: %s", path);
349 return ret; /* caller frees */
352 /* The main inspection code. */
353 static int feature_available (guestfs_h *g, const char *feature);
354 static void free_string_list (char **);
355 static int check_for_filesystem_on (guestfs_h *g, const char *device);
358 guestfs__inspect_os (guestfs_h *g)
360 /* Remove any information previously stored in the handle. */
361 guestfs___free_inspect_info (g);
363 if (guestfs_umount_all (g) == -1)
366 /* Iterate over all possible devices. Try to mount each
367 * (read-only). Examine ones which contain filesystems and add that
368 * information to the handle.
370 /* Look to see if any devices directly contain filesystems (RHBZ#590167). */
372 devices = guestfs_list_devices (g);
377 for (i = 0; devices[i] != NULL; ++i) {
378 if (check_for_filesystem_on (g, devices[i]) == -1) {
379 free_string_list (devices);
380 guestfs___free_inspect_info (g);
384 free_string_list (devices);
386 /* Look at all partitions. */
388 partitions = guestfs_list_partitions (g);
389 if (partitions == NULL) {
390 guestfs___free_inspect_info (g);
394 for (i = 0; partitions[i] != NULL; ++i) {
395 if (check_for_filesystem_on (g, partitions[i]) == -1) {
396 free_string_list (partitions);
397 guestfs___free_inspect_info (g);
401 free_string_list (partitions);
403 /* Look at all LVs. */
404 if (feature_available (g, "lvm2")) {
406 lvs = guestfs_lvs (g);
408 guestfs___free_inspect_info (g);
412 for (i = 0; lvs[i] != NULL; ++i) {
413 if (check_for_filesystem_on (g, lvs[i]) == -1) {
414 free_string_list (lvs);
415 guestfs___free_inspect_info (g);
419 free_string_list (lvs);
422 /* At this point we have, in the handle, a list of all filesystems
423 * found and data about each one. Now we assemble the list of
424 * filesystems which are root devices and return that to the user.
427 for (i = 0; i < g->nr_fses; ++i)
428 if (g->fses[i].is_root)
431 char **ret = calloc (count+1, sizeof (char *));
433 perrorf (g, "calloc");
434 guestfs___free_inspect_info (g);
439 for (i = 0; i < g->nr_fses; ++i) {
440 if (g->fses[i].is_root) {
441 ret[count] = safe_strdup (g, g->fses[i].device);
451 guestfs___free_inspect_info (guestfs_h *g)
454 for (i = 0; i < g->nr_fses; ++i) {
455 free (g->fses[i].device);
456 free (g->fses[i].product_name);
457 free (g->fses[i].arch);
458 free (g->fses[i].windows_systemroot);
460 for (j = 0; j < g->fses[i].nr_fstab; ++j) {
461 free (g->fses[i].fstab[j].device);
462 free (g->fses[i].fstab[j].mountpoint);
464 free (g->fses[i].fstab);
472 free_string_list (char **argv)
475 for (i = 0; argv[i] != NULL; ++i)
480 /* In the Perl code this is a public function. */
482 feature_available (guestfs_h *g, const char *feature)
484 /* If there's an error we should ignore it, so to do that we have to
485 * temporarily replace the error handler with a null one.
487 guestfs_error_handler_cb old_error_cb = g->error_cb;
490 const char *groups[] = { feature, NULL };
491 int r = guestfs_available (g, (char * const *) groups);
493 g->error_cb = old_error_cb;
495 return r == 0 ? 1 : 0;
498 /* Find out if 'device' contains a filesystem. If it does, add
499 * another entry in g->fses.
501 static int check_filesystem (guestfs_h *g, const char *device);
502 static int check_linux_root (guestfs_h *g, struct inspect_fs *fs);
503 static int check_fstab (guestfs_h *g, struct inspect_fs *fs);
504 static int check_windows_root (guestfs_h *g, struct inspect_fs *fs);
505 static int check_windows_arch (guestfs_h *g, struct inspect_fs *fs);
506 static int check_windows_registry (guestfs_h *g, struct inspect_fs *fs);
507 static char *resolve_windows_path_silently (guestfs_h *g, const char *);
508 static int extend_fses (guestfs_h *g);
509 static int parse_unsigned_int (guestfs_h *g, const char *str);
510 static int add_fstab_entry (guestfs_h *g, struct inspect_fs *fs,
511 const char *spec, const char *mp);
512 static char *resolve_fstab_device (guestfs_h *g, const char *spec);
515 check_for_filesystem_on (guestfs_h *g, const char *device)
517 /* Get vfs-type in order to check if it's a Linux(?) swap device.
518 * If there's an error we should ignore it, so to do that we have to
519 * temporarily replace the error handler with a null one.
521 guestfs_error_handler_cb old_error_cb = g->error_cb;
523 char *vfs_type = guestfs_vfs_type (g, device);
524 g->error_cb = old_error_cb;
526 int is_swap = vfs_type && STREQ (vfs_type, "swap");
529 fprintf (stderr, "check_for_filesystem_on: %s (%s)\n",
530 device, vfs_type ? vfs_type : "failed to get vfs type");
534 if (extend_fses (g) == -1)
536 g->fses[g->nr_fses-1].is_swap = 1;
540 /* Try mounting the device. As above, ignore errors. */
542 int r = guestfs_mount_ro (g, device, "/");
543 if (r == -1 && vfs_type && STREQ (vfs_type, "ufs")) /* Hack for the *BSDs. */
544 r = guestfs_mount_vfs (g, "ro,ufstype=ufs2", "ufs", device, "/");
546 g->error_cb = old_error_cb;
550 /* Do the rest of the checks. */
551 r = check_filesystem (g, device);
553 /* Unmount the filesystem. */
554 if (guestfs_umount_all (g) == -1)
561 check_filesystem (guestfs_h *g, const char *device)
563 if (extend_fses (g) == -1)
566 struct inspect_fs *fs = &g->fses[g->nr_fses-1];
568 fs->device = safe_strdup (g, device);
569 fs->is_mountable = 1;
572 if (guestfs_is_file (g, "/grub/menu.lst") > 0 ||
573 guestfs_is_file (g, "/grub/grub.conf") > 0)
574 fs->content = FS_CONTENT_LINUX_BOOT;
576 else if (guestfs_is_dir (g, "/etc") > 0 &&
577 guestfs_is_dir (g, "/bin") > 0 &&
578 guestfs_is_file (g, "/etc/fstab") > 0) {
580 fs->content = FS_CONTENT_LINUX_ROOT;
581 if (check_linux_root (g, fs) == -1)
584 /* Linux /usr/local? */
585 else if (guestfs_is_dir (g, "/etc") > 0 &&
586 guestfs_is_dir (g, "/bin") > 0 &&
587 guestfs_is_dir (g, "/share") > 0 &&
588 guestfs_exists (g, "/local") == 0 &&
589 guestfs_is_file (g, "/etc/fstab") == 0)
590 fs->content = FS_CONTENT_LINUX_USR_LOCAL;
592 else if (guestfs_is_dir (g, "/etc") > 0 &&
593 guestfs_is_dir (g, "/bin") > 0 &&
594 guestfs_is_dir (g, "/share") > 0 &&
595 guestfs_exists (g, "/local") > 0 &&
596 guestfs_is_file (g, "/etc/fstab") == 0)
597 fs->content = FS_CONTENT_LINUX_USR;
599 else if (guestfs_is_dir (g, "/log") > 0 &&
600 guestfs_is_dir (g, "/run") > 0 &&
601 guestfs_is_dir (g, "/spool") > 0)
602 fs->content = FS_CONTENT_LINUX_VAR;
604 else if (guestfs_is_file (g, "/AUTOEXEC.BAT") > 0 ||
605 guestfs_is_file (g, "/autoexec.bat") > 0 ||
606 guestfs_is_dir (g, "/Program Files") > 0 ||
607 guestfs_is_dir (g, "/WINDOWS") > 0 ||
608 guestfs_is_dir (g, "/Windows") > 0 ||
609 guestfs_is_dir (g, "/windows") > 0 ||
610 guestfs_is_dir (g, "/WIN32") > 0 ||
611 guestfs_is_dir (g, "/Win32") > 0 ||
612 guestfs_is_dir (g, "/WINNT") > 0 ||
613 guestfs_is_file (g, "/boot.ini") > 0 ||
614 guestfs_is_file (g, "/ntldr") > 0) {
616 fs->content = FS_CONTENT_WINDOWS_ROOT;
617 if (check_windows_root (g, fs) == -1)
624 /* Set fs->product_name to the first line of the release file. */
626 parse_release_file (guestfs_h *g, struct inspect_fs *fs,
627 const char *release_filename)
629 char **product_name = guestfs_head_n (g, 1, release_filename);
630 if (product_name == NULL)
632 if (product_name[0] == NULL) {
633 error (g, "%s: file is empty", release_filename);
634 free_string_list (product_name);
638 /* Note that this string becomes owned by the handle and will
639 * be freed by guestfs___free_inspect_info.
641 fs->product_name = product_name[0];
647 /* Parse generic MAJOR.MINOR from the fs->product_name string. */
649 parse_major_minor (guestfs_h *g, struct inspect_fs *fs)
653 if (match2 (g, fs->product_name, re_major_minor, &major, &minor)) {
654 fs->major_version = parse_unsigned_int (g, major);
656 if (fs->major_version == -1) {
660 fs->minor_version = parse_unsigned_int (g, minor);
662 if (fs->minor_version == -1)
668 /* Ubuntu has /etc/lsb-release containing:
669 * DISTRIB_ID=Ubuntu # Distro
670 * DISTRIB_RELEASE=10.04 # Version
671 * DISTRIB_CODENAME=lucid
672 * DISTRIB_DESCRIPTION="Ubuntu 10.04.1 LTS" # Product name
673 * In theory other distros could have this LSB file, but none do.
676 parse_lsb_release (guestfs_h *g, struct inspect_fs *fs)
682 lines = guestfs_head_n (g, 10, "/etc/lsb-release");
686 for (i = 0; lines[i] != NULL; ++i) {
687 if (fs->distro == 0 &&
688 STREQ (lines[i], "DISTRIB_ID=Ubuntu")) {
689 fs->distro = OS_DISTRO_UBUNTU;
692 else if (STRPREFIX (lines[i], "DISTRIB_RELEASE=")) {
694 if (match2 (g, &lines[i][16], re_major_minor, &major, &minor)) {
695 fs->major_version = parse_unsigned_int (g, major);
697 if (fs->major_version == -1) {
699 free_string_list (lines);
702 fs->minor_version = parse_unsigned_int (g, minor);
704 if (fs->minor_version == -1) {
705 free_string_list (lines);
710 else if (fs->product_name == NULL &&
711 (STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=\"") ||
712 STRPREFIX (lines[i], "DISTRIB_DESCRIPTION='"))) {
713 size_t len = strlen (lines[i]) - 21 - 1;
714 fs->product_name = safe_strndup (g, &lines[i][21], len);
717 else if (fs->product_name == NULL &&
718 STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=")) {
719 size_t len = strlen (lines[i]) - 20;
720 fs->product_name = safe_strndup (g, &lines[i][20], len);
725 free_string_list (lines);
729 /* The currently mounted device is known to be a Linux root. Try to
730 * determine from this the distro, version, etc. Also parse
731 * /etc/fstab to determine the arrangement of mountpoints and
732 * associated devices.
735 check_linux_root (guestfs_h *g, struct inspect_fs *fs)
739 fs->type = OS_TYPE_LINUX;
741 if (guestfs_exists (g, "/etc/lsb-release") > 0) {
742 r = parse_lsb_release (g, fs);
743 if (r == -1) /* error */
745 if (r == 1) /* ok - detected the release from this file */
746 goto skip_release_checks;
749 if (guestfs_exists (g, "/etc/redhat-release") > 0) {
750 fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */
752 if (parse_release_file (g, fs, "/etc/redhat-release") == -1)
756 if ((major = match1 (g, fs->product_name, re_fedora)) != NULL) {
757 fs->distro = OS_DISTRO_FEDORA;
758 fs->major_version = parse_unsigned_int (g, major);
760 if (fs->major_version == -1)
763 else if (match2 (g, fs->product_name, re_rhel_old, &major, &minor) ||
764 match2 (g, fs->product_name, re_rhel, &major, &minor)) {
765 fs->distro = OS_DISTRO_RHEL;
766 fs->major_version = parse_unsigned_int (g, major);
768 if (fs->major_version == -1) {
772 fs->minor_version = parse_unsigned_int (g, minor);
774 if (fs->minor_version == -1)
777 else if ((major = match1 (g, fs->product_name, re_rhel_no_minor)) != NULL) {
778 fs->distro = OS_DISTRO_RHEL;
779 fs->major_version = parse_unsigned_int (g, major);
781 if (fs->major_version == -1)
783 fs->minor_version = 0;
786 else if (guestfs_exists (g, "/etc/debian_version") > 0) {
787 fs->distro = OS_DISTRO_DEBIAN;
789 if (parse_release_file (g, fs, "/etc/debian_version") == -1)
792 if (parse_major_minor (g, fs) == -1)
795 else if (guestfs_exists (g, "/etc/pardus-release") > 0) {
796 fs->distro = OS_DISTRO_PARDUS;
798 if (parse_release_file (g, fs, "/etc/pardus-release") == -1)
801 if (parse_major_minor (g, fs) == -1)
804 else if (guestfs_exists (g, "/etc/arch-release") > 0) {
805 fs->distro = OS_DISTRO_ARCHLINUX;
807 /* /etc/arch-release file is empty and I can't see a way to
808 * determine the actual release or product string.
811 else if (guestfs_exists (g, "/etc/gentoo-release") > 0) {
812 fs->distro = OS_DISTRO_GENTOO;
814 if (parse_release_file (g, fs, "/etc/gentoo-release") == -1)
817 if (parse_major_minor (g, fs) == -1)
820 else if (guestfs_exists (g, "/etc/meego-release") > 0) {
821 fs->distro = OS_DISTRO_MEEGO;
823 if (parse_release_file (g, fs, "/etc/meego-release") == -1)
826 if (parse_major_minor (g, fs) == -1)
830 skip_release_checks:;
832 /* Determine the architecture. */
833 const char *binaries[] =
834 { "/bin/bash", "/bin/ls", "/bin/echo", "/bin/rm", "/bin/sh" };
836 for (i = 0; i < sizeof binaries / sizeof binaries[0]; ++i) {
837 if (guestfs_is_file (g, binaries[i]) > 0) {
838 /* Ignore errors from file_architecture call. */
839 guestfs_error_handler_cb old_error_cb = g->error_cb;
841 char *arch = guestfs_file_architecture (g, binaries[i]);
842 g->error_cb = old_error_cb;
845 /* String will be owned by handle, freed by
846 * guestfs___free_inspect_info.
854 /* We already know /etc/fstab exists because it's part of the test
855 * for Linux root above. We must now parse this file to determine
856 * which filesystems are used by the operating system and how they
858 * XXX What if !feature_available (g, "augeas")?
860 if (guestfs_aug_init (g, "/", 16|32) == -1)
863 /* Tell Augeas to only load /etc/fstab (thanks Raphaël Pinson). */
864 guestfs_aug_rm (g, "/augeas/load//incl[. != \"/etc/fstab\"]");
865 guestfs_aug_load (g);
867 r = check_fstab (g, fs);
868 guestfs_aug_close (g);
876 check_fstab (guestfs_h *g, struct inspect_fs *fs)
878 char **lines = guestfs_aug_ls (g, "/files/etc/fstab");
882 if (lines[0] == NULL) {
883 error (g, "could not parse /etc/fstab or empty file");
884 free_string_list (lines);
890 for (i = 0; lines[i] != NULL; ++i) {
891 /* Ignore comments. Only care about sequence lines which
894 if (match (g, lines[i], re_aug_seq)) {
895 snprintf (augpath, sizeof augpath, "%s/spec", lines[i]);
896 char *spec = guestfs_aug_get (g, augpath);
898 free_string_list (lines);
902 snprintf (augpath, sizeof augpath, "%s/file", lines[i]);
903 char *mp = guestfs_aug_get (g, augpath);
905 free_string_list (lines);
910 int r = add_fstab_entry (g, fs, spec, mp);
915 free_string_list (lines);
921 free_string_list (lines);
925 /* Add a filesystem and possibly a mountpoint entry for
926 * the root filesystem 'fs'.
928 * 'spec' is the fstab spec field, which might be a device name or a
929 * pseudodevice or 'UUID=...' or 'LABEL=...'.
931 * 'mp' is the mount point, which could also be 'swap' or 'none'.
934 add_fstab_entry (guestfs_h *g, struct inspect_fs *fs,
935 const char *spec, const char *mp)
937 /* Ignore certain mountpoints. */
938 if (STRPREFIX (mp, "/dev/") ||
939 STREQ (mp, "/dev") ||
940 STRPREFIX (mp, "/media/") ||
941 STRPREFIX (mp, "/proc/") ||
942 STREQ (mp, "/proc") ||
943 STRPREFIX (mp, "/selinux/") ||
944 STREQ (mp, "/selinux") ||
945 STRPREFIX (mp, "/sys/") ||
949 /* Ignore /dev/fd (floppy disks) (RHBZ#642929) and CD-ROM drives. */
950 if ((STRPREFIX (spec, "/dev/fd") && c_isdigit (spec[7])) ||
951 STREQ (spec, "/dev/floppy") ||
952 STREQ (spec, "/dev/cdrom"))
955 /* Resolve UUID= and LABEL= to the actual device. */
957 if (STRPREFIX (spec, "UUID="))
958 device = guestfs_findfs_uuid (g, &spec[5]);
959 else if (STRPREFIX (spec, "LABEL="))
960 device = guestfs_findfs_label (g, &spec[6]);
961 /* Ignore "/.swap" (Pardus) and pseudo-devices like "tmpfs". */
962 else if (STRPREFIX (spec, "/dev/"))
963 /* Resolve guest block device names. */
964 device = resolve_fstab_device (g, spec);
966 /* If we haven't resolved the device successfully by this point,
967 * we don't care, just ignore it.
972 char *mountpoint = safe_strdup (g, mp);
974 /* Add this to the fstab entry in 'fs'.
975 * Note these are further filtered by guestfs_inspect_get_mountpoints
976 * and guestfs_inspect_get_filesystems.
978 size_t n = fs->nr_fstab + 1;
979 struct inspect_fstab_entry *p;
981 p = realloc (fs->fstab, n * sizeof (struct inspect_fstab_entry));
983 perrorf (g, "realloc");
992 /* These are owned by the handle and freed by guestfs___free_inspect_info. */
993 fs->fstab[n-1].device = device;
994 fs->fstab[n-1].mountpoint = mountpoint;
997 fprintf (stderr, "fstab: device=%s mountpoint=%s\n", device, mountpoint);
1002 /* Resolve block device name to the libguestfs device name, eg.
1003 * /dev/xvdb1 => /dev/vdb1; and /dev/mapper/VG-LV => /dev/VG/LV. This
1004 * assumes that disks were added in the same order as they appear to
1005 * the real VM, which is a reasonable assumption to make. Return
1006 * anything we don't recognize unchanged.
1009 resolve_fstab_device (guestfs_h *g, const char *spec)
1012 char *device = NULL;
1014 if (STRPREFIX (spec, "/dev/mapper/")) {
1015 /* LVM2 does some strange munging on /dev/mapper paths for VGs and
1016 * LVs which contain '-' character:
1018 * ><fs> lvcreate LV--test VG--test 32
1019 * ><fs> debug ls /dev/mapper
1020 * VG----test-LV----test
1022 * This makes it impossible to reverse those paths directly, so
1023 * we have implemented lvm_canonical_lv_name in the daemon.
1025 device = guestfs_lvm_canonical_lv_name (g, spec);
1027 else if ((a1 = match1 (g, spec, re_xdev)) != NULL) {
1028 char **devices = guestfs_list_devices (g);
1029 if (devices == NULL)
1033 for (count = 0; devices[count] != NULL; count++)
1036 size_t i = a1[0] - 'a'; /* a1[0] is always [a-z] because of regex. */
1038 size_t len = strlen (devices[i]) + strlen (a1) + 16;
1039 device = safe_malloc (g, len);
1040 snprintf (device, len, "%s%s", devices[i], &a1[1]);
1044 free_string_list (devices);
1047 /* Didn't match device pattern, return original spec unchanged. */
1048 device = safe_strdup (g, spec);
1054 /* XXX Handling of boot.ini in the Perl version was pretty broken. It
1055 * essentially didn't do anything for modern Windows guests.
1056 * Therefore I've omitted all that code.
1059 check_windows_root (guestfs_h *g, struct inspect_fs *fs)
1061 fs->type = OS_TYPE_WINDOWS;
1062 fs->distro = OS_DISTRO_WINDOWS;
1064 /* Try to find Windows systemroot using some common locations. */
1065 const char *systemroots[] =
1066 { "/windows", "/winnt", "/win32", "/win" };
1068 char *systemroot = NULL;
1070 systemroot == NULL && i < sizeof systemroots / sizeof systemroots[0];
1072 systemroot = resolve_windows_path_silently (g, systemroots[i]);
1076 error (g, _("cannot resolve Windows %%SYSTEMROOT%%"));
1081 fprintf (stderr, "windows %%SYSTEMROOT%% = %s", systemroot);
1083 /* Freed by guestfs___free_inspect_info. */
1084 fs->windows_systemroot = systemroot;
1086 if (check_windows_arch (g, fs) == -1)
1089 if (check_windows_registry (g, fs) == -1)
1096 check_windows_arch (guestfs_h *g, struct inspect_fs *fs)
1098 size_t len = strlen (fs->windows_systemroot) + 32;
1100 snprintf (cmd_exe, len, "%s/system32/cmd.exe", fs->windows_systemroot);
1102 char *cmd_exe_path = resolve_windows_path_silently (g, cmd_exe);
1106 char *arch = guestfs_file_architecture (g, cmd_exe_path);
1107 free (cmd_exe_path);
1110 fs->arch = arch; /* freed by guestfs___free_inspect_info */
1115 /* At the moment, pull just the ProductName and version numbers from
1116 * the registry. In future there is a case for making many more
1117 * registry fields available to callers.
1120 check_windows_registry (guestfs_h *g, struct inspect_fs *fs)
1122 TMP_TEMPLATE_ON_STACK (dir);
1123 #define dir_len (strlen (dir))
1124 #define software_hive_len (dir_len + 16)
1125 char software_hive[software_hive_len];
1126 #define cmd_len (dir_len + 16)
1129 size_t len = strlen (fs->windows_systemroot) + 64;
1131 snprintf (software, len, "%s/system32/config/software",
1132 fs->windows_systemroot);
1134 char *software_path = resolve_windows_path_silently (g, software);
1136 /* If the software hive doesn't exist, just accept that we cannot
1137 * find product_name etc.
1143 hive_value_h *values = NULL;
1145 if (mkdtemp (dir) == NULL) {
1146 perrorf (g, "mkdtemp");
1150 snprintf (software_hive, software_hive_len, "%s/software", dir);
1152 if (guestfs_download (g, software_path, software_hive) == -1)
1155 h = hivex_open (software_hive, g->verbose ? HIVEX_OPEN_VERBOSE : 0);
1157 perrorf (g, "hivex_open");
1161 hive_node_h node = hivex_root (h);
1162 const char *hivepath[] =
1163 { "Microsoft", "Windows NT", "CurrentVersion" };
1166 node != 0 && i < sizeof hivepath / sizeof hivepath[0];
1168 node = hivex_node_get_child (h, node, hivepath[i]);
1172 perrorf (g, "hivex: cannot locate HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion");
1176 values = hivex_node_values (h, node);
1178 for (i = 0; values[i] != 0; ++i) {
1179 char *key = hivex_value_key (h, values[i]);
1181 perrorf (g, "hivex_value_key");
1185 if (STRCASEEQ (key, "ProductName")) {
1186 fs->product_name = hivex_value_string (h, values[i]);
1187 if (!fs->product_name) {
1188 perrorf (g, "hivex_value_string");
1193 else if (STRCASEEQ (key, "CurrentVersion")) {
1194 char *version = hivex_value_string (h, values[i]);
1196 perrorf (g, "hivex_value_string");
1200 char *major, *minor;
1201 if (match2 (g, version, re_windows_version, &major, &minor)) {
1202 fs->major_version = parse_unsigned_int (g, major);
1204 if (fs->major_version == -1) {
1210 fs->minor_version = parse_unsigned_int (g, minor);
1212 if (fs->minor_version == -1) {
1228 if (h) hivex_close (h);
1230 free (software_path);
1232 /* Free up the temporary directory. Note the directory name cannot
1233 * contain shell meta-characters because of the way it was
1234 * constructed above.
1236 snprintf (cmd, cmd_len, "rm -rf %s", dir);
1237 ignore_value (system (cmd));
1239 #undef software_hive_len
1246 resolve_windows_path_silently (guestfs_h *g, const char *path)
1248 guestfs_error_handler_cb old_error_cb = g->error_cb;
1250 char *ret = guestfs_case_sensitive_path (g, path);
1251 g->error_cb = old_error_cb;
1256 extend_fses (guestfs_h *g)
1258 size_t n = g->nr_fses + 1;
1259 struct inspect_fs *p;
1261 p = realloc (g->fses, n * sizeof (struct inspect_fs));
1263 perrorf (g, "realloc");
1270 memset (&g->fses[n-1], 0, sizeof (struct inspect_fs));
1275 /* Parse small, unsigned ints, as used in version numbers. */
1277 parse_unsigned_int (guestfs_h *g, const char *str)
1280 int r = xstrtol (str, NULL, 10, &ret, "");
1281 if (r != LONGINT_OK) {
1282 error (g, "could not parse integer in version number: %s", str);
1288 static struct inspect_fs *
1289 search_for_root (guestfs_h *g, const char *root)
1291 if (g->nr_fses == 0) {
1292 error (g, _("no inspection data: call guestfs_inspect_os first"));
1297 struct inspect_fs *fs;
1298 for (i = 0; i < g->nr_fses; ++i) {
1300 if (fs->is_root && STREQ (root, fs->device))
1304 error (g, _("%s: root device not found: only call this function with a root device previously returned by guestfs_inspect_os"),
1310 guestfs__inspect_get_type (guestfs_h *g, const char *root)
1312 struct inspect_fs *fs = search_for_root (g, root);
1318 case OS_TYPE_LINUX: ret = safe_strdup (g, "linux"); break;
1319 case OS_TYPE_WINDOWS: ret = safe_strdup (g, "windows"); break;
1320 case OS_TYPE_UNKNOWN: default: ret = safe_strdup (g, "unknown"); break;
1327 guestfs__inspect_get_arch (guestfs_h *g, const char *root)
1329 struct inspect_fs *fs = search_for_root (g, root);
1333 return safe_strdup (g, fs->arch ? : "unknown");
1337 guestfs__inspect_get_distro (guestfs_h *g, const char *root)
1339 struct inspect_fs *fs = search_for_root (g, root);
1344 switch (fs->distro) {
1345 case OS_DISTRO_ARCHLINUX: ret = safe_strdup (g, "archlinux"); break;
1346 case OS_DISTRO_DEBIAN: ret = safe_strdup (g, "debian"); break;
1347 case OS_DISTRO_FEDORA: ret = safe_strdup (g, "fedora"); break;
1348 case OS_DISTRO_GENTOO: ret = safe_strdup (g, "gentoo"); break;
1349 case OS_DISTRO_MEEGO: ret = safe_strdup (g, "meego"); break;
1350 case OS_DISTRO_PARDUS: ret = safe_strdup (g, "pardus"); break;
1351 case OS_DISTRO_REDHAT_BASED: ret = safe_strdup (g, "redhat-based"); break;
1352 case OS_DISTRO_RHEL: ret = safe_strdup (g, "rhel"); break;
1353 case OS_DISTRO_WINDOWS: ret = safe_strdup (g, "windows"); break;
1354 case OS_DISTRO_UBUNTU: ret = safe_strdup (g, "ubuntu"); break;
1355 case OS_DISTRO_UNKNOWN: default: ret = safe_strdup (g, "unknown"); break;
1362 guestfs__inspect_get_major_version (guestfs_h *g, const char *root)
1364 struct inspect_fs *fs = search_for_root (g, root);
1368 return fs->major_version;
1372 guestfs__inspect_get_minor_version (guestfs_h *g, const char *root)
1374 struct inspect_fs *fs = search_for_root (g, root);
1378 return fs->minor_version;
1382 guestfs__inspect_get_product_name (guestfs_h *g, const char *root)
1384 struct inspect_fs *fs = search_for_root (g, root);
1388 return safe_strdup (g, fs->product_name ? : "unknown");
1392 guestfs__inspect_get_windows_systemroot (guestfs_h *g, const char *root)
1394 struct inspect_fs *fs = search_for_root (g, root);
1398 if (!fs->windows_systemroot) {
1399 error (g, _("not a Windows guest, or systemroot could not be determined"));
1403 return safe_strdup (g, fs->windows_systemroot);
1407 guestfs__inspect_get_mountpoints (guestfs_h *g, const char *root)
1409 struct inspect_fs *fs = search_for_root (g, root);
1415 /* If no fstab information (Windows) return just the root. */
1416 if (fs->nr_fstab == 0) {
1417 ret = calloc (3, sizeof (char *));
1418 ret[0] = safe_strdup (g, "/");
1419 ret[1] = safe_strdup (g, root);
1424 #define CRITERION fs->fstab[i].mountpoint[0] == '/'
1425 size_t i, count = 0;
1426 for (i = 0; i < fs->nr_fstab; ++i)
1430 /* Hashtables have 2N+1 entries. */
1431 ret = calloc (2*count+1, sizeof (char *));
1433 perrorf (g, "calloc");
1438 for (i = 0; i < fs->nr_fstab; ++i)
1440 ret[2*count] = safe_strdup (g, fs->fstab[i].mountpoint);
1441 ret[2*count+1] = safe_strdup (g, fs->fstab[i].device);
1450 guestfs__inspect_get_filesystems (guestfs_h *g, const char *root)
1452 struct inspect_fs *fs = search_for_root (g, root);
1458 /* If no fstab information (Windows) return just the root. */
1459 if (fs->nr_fstab == 0) {
1460 ret = calloc (2, sizeof (char *));
1461 ret[0] = safe_strdup (g, root);
1466 ret = calloc (fs->nr_fstab + 1, sizeof (char *));
1468 perrorf (g, "calloc");
1473 for (i = 0; i < fs->nr_fstab; ++i)
1474 ret[i] = safe_strdup (g, fs->fstab[i].device);
1479 /* List filesystems.
1481 * The current implementation just uses guestfs_vfs_type and doesn't
1482 * try mounting anything, but we reserve the right in future to try
1483 * mounting filesystems.
1486 static void remove_from_list (char **list, const char *item);
1487 static void check_with_vfs_type (guestfs_h *g, const char *dev, char ***ret, size_t *ret_size);
1490 guestfs__list_filesystems (guestfs_h *g)
1496 ret = safe_malloc (g, sizeof (char *));
1500 /* Look to see if any devices directly contain filesystems
1501 * (RHBZ#590167). However vfs-type will fail to tell us anything
1502 * useful about devices which just contain partitions, so we also
1503 * get the list of partitions and exclude the corresponding devices
1504 * by using part-to-dev.
1507 devices = guestfs_list_devices (g);
1508 if (devices == NULL) {
1509 free_string_list (ret);
1513 partitions = guestfs_list_partitions (g);
1514 if (partitions == NULL) {
1515 free_string_list (devices);
1516 free_string_list (ret);
1520 for (i = 0; partitions[i] != NULL; ++i) {
1521 char *dev = guestfs_part_to_dev (g, partitions[i]);
1523 remove_from_list (devices, dev);
1527 /* Use vfs-type to check for filesystems on devices. */
1528 for (i = 0; devices[i] != NULL; ++i)
1529 check_with_vfs_type (g, devices[i], &ret, &ret_size);
1530 free_string_list (devices);
1532 /* Use vfs-type to check for filesystems on partitions. */
1533 for (i = 0; partitions[i] != NULL; ++i)
1534 check_with_vfs_type (g, partitions[i], &ret, &ret_size);
1535 free_string_list (partitions);
1537 if (feature_available (g, "lvm2")) {
1538 /* Use vfs-type to check for filesystems on LVs. */
1540 lvs = guestfs_lvs (g);
1542 free_string_list (ret);
1546 for (i = 0; lvs[i] != NULL; ++i)
1547 check_with_vfs_type (g, lvs[i], &ret, &ret_size);
1548 free_string_list (lvs);
1554 /* If 'item' occurs in 'list', remove and free it. */
1556 remove_from_list (char **list, const char *item)
1560 for (i = 0; list[i] != NULL; ++i)
1561 if (STREQ (list[i], item)) {
1563 for (; list[i+1] != NULL; ++i)
1564 list[i] = list[i+1];
1570 /* Use vfs-type to look for a filesystem of some sort on 'dev'.
1571 * Apart from some types which we ignore, add the result to the
1572 * 'ret' string list.
1575 check_with_vfs_type (guestfs_h *g, const char *device,
1576 char ***ret, size_t *ret_size)
1580 guestfs_error_handler_cb old_error_cb = g->error_cb;
1582 char *vfs_type = guestfs_vfs_type (g, device);
1583 g->error_cb = old_error_cb;
1586 v = safe_strdup (g, "unknown");
1588 /* Ignore all "*_member" strings. In libblkid these are returned
1589 * for things which are members of some RAID or LVM set, most
1590 * importantly "LVM2_member" which is a PV.
1592 size_t n = strlen (vfs_type);
1593 if (n >= 7 && STREQ (&vfs_type[n-7], "_member")) {
1598 /* Ignore LUKS-encrypted partitions. These are also containers. */
1599 if (STREQ (vfs_type, "crypto_LUKS")) {
1607 /* Extend the return array. */
1608 size_t i = *ret_size;
1610 *ret = safe_realloc (g, *ret, (*ret_size + 1) * sizeof (char *));
1611 (*ret)[i] = safe_strdup (g, device);