2 * Copyright (C) 2010-2011 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
39 #include "ignore-value.h"
43 #include "guestfs-internal.h"
44 #include "guestfs-internal-actions.h"
45 #include "guestfs_protocol.h"
47 #if defined(HAVE_HIVEX)
49 /* Compile all the regular expressions once when the shared library is
50 * loaded. PCRE is thread safe so we're supposedly OK here if
51 * multiple threads call into the libguestfs API functions below
54 static pcre *re_fedora;
55 static pcre *re_rhel_old;
57 static pcre *re_rhel_no_minor;
58 static pcre *re_centos_old;
59 static pcre *re_centos;
60 static pcre *re_centos_no_minor;
61 static pcre *re_scientific_linux_old;
62 static pcre *re_scientific_linux;
63 static pcre *re_scientific_linux_no_minor;
64 static pcre *re_major_minor;
65 static pcre *re_aug_seq;
67 static pcre *re_cciss;
68 static pcre *re_first_partition;
69 static pcre *re_freebsd;
70 static pcre *re_netbsd;
72 static void compile_regexps (void) __attribute__((constructor));
73 static void free_regexps (void) __attribute__((destructor));
76 compile_regexps (void)
81 #define COMPILE(re,pattern,options) \
83 re = pcre_compile ((pattern), (options), &err, &offset, NULL); \
85 ignore_value (write (2, err, strlen (err))); \
90 COMPILE (re_fedora, "Fedora release (\\d+)", 0);
92 "Red Hat.*release (\\d+).*Update (\\d+)", 0);
94 "Red Hat.*release (\\d+)\\.(\\d+)", 0);
95 COMPILE (re_rhel_no_minor,
96 "Red Hat.*release (\\d+)", 0);
97 COMPILE (re_centos_old,
98 "CentOS.*release (\\d+).*Update (\\d+)", 0);
100 "CentOS.*release (\\d+)\\.(\\d+)", 0);
101 COMPILE (re_centos_no_minor,
102 "CentOS.*release (\\d+)", 0);
103 COMPILE (re_scientific_linux_old,
104 "Scientific Linux.*release (\\d+).*Update (\\d+)", 0);
105 COMPILE (re_scientific_linux,
106 "Scientific Linux.*release (\\d+)\\.(\\d+)", 0);
107 COMPILE (re_scientific_linux_no_minor,
108 "Scientific Linux.*release (\\d+)", 0);
109 COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0);
110 COMPILE (re_xdev, "^/dev/(h|s|v|xv)d([a-z]+)(\\d*)$", 0);
111 COMPILE (re_cciss, "^/dev/(cciss/c\\d+d\\d+)(?:p(\\d+))?$", 0);
112 COMPILE (re_freebsd, "^/dev/ad(\\d+)s(\\d+)([a-z])$", 0);
113 COMPILE (re_netbsd, "^NetBSD (\\d+)\\.(\\d+)", 0);
119 pcre_free (re_fedora);
120 pcre_free (re_rhel_old);
122 pcre_free (re_rhel_no_minor);
123 pcre_free (re_centos_old);
124 pcre_free (re_centos);
125 pcre_free (re_centos_no_minor);
126 pcre_free (re_scientific_linux_old);
127 pcre_free (re_scientific_linux);
128 pcre_free (re_scientific_linux_no_minor);
129 pcre_free (re_major_minor);
131 pcre_free (re_cciss);
132 pcre_free (re_freebsd);
133 pcre_free (re_netbsd);
136 static void check_architecture (guestfs_h *g, struct inspect_fs *fs);
137 static int check_hostname_unix (guestfs_h *g, struct inspect_fs *fs);
138 static int check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs);
139 static int check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs);
140 static int check_fstab (guestfs_h *g, struct inspect_fs *fs);
141 static int add_fstab_entry (guestfs_h *g, struct inspect_fs *fs,
142 const char *spec, const char *mp);
143 static char *resolve_fstab_device (guestfs_h *g, const char *spec);
144 static int inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs, const char **configfiles, int (*f) (guestfs_h *, struct inspect_fs *));
146 /* Set fs->product_name to the first line of the release file. */
148 parse_release_file (guestfs_h *g, struct inspect_fs *fs,
149 const char *release_filename)
151 fs->product_name = guestfs___first_line_of_file (g, release_filename);
152 if (fs->product_name == NULL)
157 /* Ubuntu has /etc/lsb-release containing:
158 * DISTRIB_ID=Ubuntu # Distro
159 * DISTRIB_RELEASE=10.04 # Version
160 * DISTRIB_CODENAME=lucid
161 * DISTRIB_DESCRIPTION="Ubuntu 10.04.1 LTS" # Product name
163 * [Ubuntu-derived ...] Linux Mint was found to have this:
164 * DISTRIB_ID=LinuxMint
166 * DISTRIB_CODENAME=julia
167 * DISTRIB_DESCRIPTION="Linux Mint 10 Julia"
168 * Linux Mint also has /etc/linuxmint/info with more information,
169 * but we can use the LSB file.
172 * LSB_VERSION=lsb-4.0-amd64:lsb-4.0-noarch
173 * DISTRIB_ID=MandrivaLinux
174 * DISTRIB_RELEASE=2010.1
175 * DISTRIB_CODENAME=Henry_Farman
176 * DISTRIB_DESCRIPTION="Mandriva Linux 2010.1"
177 * Mandriva also has a normal release file called /etc/mandriva-release.
180 parse_lsb_release (guestfs_h *g, struct inspect_fs *fs)
182 const char *filename = "/etc/lsb-release";
188 /* Don't trust guestfs_head_n not to break with very large files.
189 * Check the file size is something reasonable first.
191 size = guestfs_filesize (g, filename);
193 /* guestfs_filesize failed and has already set error in handle */
195 if (size > MAX_SMALL_FILE_SIZE) {
196 error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"),
201 lines = guestfs_head_n (g, 10, filename);
205 for (i = 0; lines[i] != NULL; ++i) {
206 if (fs->distro == 0 &&
207 STREQ (lines[i], "DISTRIB_ID=Ubuntu")) {
208 fs->distro = OS_DISTRO_UBUNTU;
211 else if (fs->distro == 0 &&
212 STREQ (lines[i], "DISTRIB_ID=LinuxMint")) {
213 fs->distro = OS_DISTRO_LINUX_MINT;
216 else if (fs->distro == 0 &&
217 STREQ (lines[i], "DISTRIB_ID=MandrivaLinux")) {
218 fs->distro = OS_DISTRO_MANDRIVA;
221 else if (fs->distro == 0 &&
222 STREQ (lines[i], "DISTRIB_ID=\"Mageia\"")) {
223 fs->distro = OS_DISTRO_MAGEIA;
226 else if (STRPREFIX (lines[i], "DISTRIB_RELEASE=")) {
228 if (match2 (g, &lines[i][16], re_major_minor, &major, &minor)) {
229 fs->major_version = guestfs___parse_unsigned_int (g, major);
231 if (fs->major_version == -1) {
233 guestfs___free_string_list (lines);
236 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
238 if (fs->minor_version == -1) {
239 guestfs___free_string_list (lines);
244 else if (fs->product_name == NULL &&
245 (STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=\"") ||
246 STRPREFIX (lines[i], "DISTRIB_DESCRIPTION='"))) {
247 size_t len = strlen (lines[i]) - 21 - 1;
248 fs->product_name = safe_strndup (g, &lines[i][21], len);
251 else if (fs->product_name == NULL &&
252 STRPREFIX (lines[i], "DISTRIB_DESCRIPTION=")) {
253 size_t len = strlen (lines[i]) - 20;
254 fs->product_name = safe_strndup (g, &lines[i][20], len);
259 guestfs___free_string_list (lines);
263 /* The currently mounted device is known to be a Linux root. Try to
264 * determine from this the distro, version, etc. Also parse
265 * /etc/fstab to determine the arrangement of mountpoints and
266 * associated devices.
269 guestfs___check_linux_root (guestfs_h *g, struct inspect_fs *fs)
273 fs->type = OS_TYPE_LINUX;
275 if (guestfs_exists (g, "/etc/lsb-release") > 0) {
276 r = parse_lsb_release (g, fs);
277 if (r == -1) /* error */
279 if (r == 1) /* ok - detected the release from this file */
280 goto skip_release_checks;
283 if (guestfs_exists (g, "/etc/redhat-release") > 0) {
284 fs->distro = OS_DISTRO_REDHAT_BASED; /* Something generic Red Hat-like. */
286 if (parse_release_file (g, fs, "/etc/redhat-release") == -1)
290 if ((major = match1 (g, fs->product_name, re_fedora)) != NULL) {
291 fs->distro = OS_DISTRO_FEDORA;
292 fs->major_version = guestfs___parse_unsigned_int (g, major);
294 if (fs->major_version == -1)
297 else if (match2 (g, fs->product_name, re_rhel_old, &major, &minor) ||
298 match2 (g, fs->product_name, re_rhel, &major, &minor)) {
299 fs->distro = OS_DISTRO_RHEL;
300 fs->major_version = guestfs___parse_unsigned_int (g, major);
302 if (fs->major_version == -1) {
306 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
308 if (fs->minor_version == -1)
311 else if ((major = match1 (g, fs->product_name, re_rhel_no_minor)) != NULL) {
312 fs->distro = OS_DISTRO_RHEL;
313 fs->major_version = guestfs___parse_unsigned_int (g, major);
315 if (fs->major_version == -1)
317 fs->minor_version = 0;
319 else if (match2 (g, fs->product_name, re_centos_old, &major, &minor) ||
320 match2 (g, fs->product_name, re_centos, &major, &minor)) {
321 fs->distro = OS_DISTRO_CENTOS;
322 fs->major_version = guestfs___parse_unsigned_int (g, major);
324 if (fs->major_version == -1) {
328 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
330 if (fs->minor_version == -1)
333 else if ((major = match1 (g, fs->product_name, re_centos_no_minor)) != NULL) {
334 fs->distro = OS_DISTRO_CENTOS;
335 fs->major_version = guestfs___parse_unsigned_int (g, major);
337 if (fs->major_version == -1)
339 fs->minor_version = 0;
341 else if (match2 (g, fs->product_name, re_scientific_linux_old, &major, &minor) ||
342 match2 (g, fs->product_name, re_scientific_linux, &major, &minor)) {
343 fs->distro = OS_DISTRO_SCIENTIFIC_LINUX;
344 fs->major_version = guestfs___parse_unsigned_int (g, major);
346 if (fs->major_version == -1) {
350 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
352 if (fs->minor_version == -1)
355 else if ((major = match1 (g, fs->product_name, re_scientific_linux_no_minor)) != NULL) {
356 fs->distro = OS_DISTRO_SCIENTIFIC_LINUX;
357 fs->major_version = guestfs___parse_unsigned_int (g, major);
359 if (fs->major_version == -1)
361 fs->minor_version = 0;
364 else if (guestfs_exists (g, "/etc/debian_version") > 0) {
365 fs->distro = OS_DISTRO_DEBIAN;
367 if (parse_release_file (g, fs, "/etc/debian_version") == -1)
370 if (guestfs___parse_major_minor (g, fs) == -1)
373 else if (guestfs_exists (g, "/etc/pardus-release") > 0) {
374 fs->distro = OS_DISTRO_PARDUS;
376 if (parse_release_file (g, fs, "/etc/pardus-release") == -1)
379 if (guestfs___parse_major_minor (g, fs) == -1)
382 else if (guestfs_exists (g, "/etc/arch-release") > 0) {
383 fs->distro = OS_DISTRO_ARCHLINUX;
385 /* /etc/arch-release file is empty and I can't see a way to
386 * determine the actual release or product string.
389 else if (guestfs_exists (g, "/etc/gentoo-release") > 0) {
390 fs->distro = OS_DISTRO_GENTOO;
392 if (parse_release_file (g, fs, "/etc/gentoo-release") == -1)
395 if (guestfs___parse_major_minor (g, fs) == -1)
398 else if (guestfs_exists (g, "/etc/meego-release") > 0) {
399 fs->distro = OS_DISTRO_MEEGO;
401 if (parse_release_file (g, fs, "/etc/meego-release") == -1)
404 if (guestfs___parse_major_minor (g, fs) == -1)
407 else if (guestfs_exists (g, "/etc/slackware-version") > 0) {
408 fs->distro = OS_DISTRO_SLACKWARE;
410 if (parse_release_file (g, fs, "/etc/slackware-version") == -1)
413 if (guestfs___parse_major_minor (g, fs) == -1)
416 else if (guestfs_exists (g, "/etc/ttylinux-target") > 0) {
417 fs->distro = OS_DISTRO_TTYLINUX;
419 fs->product_name = guestfs___first_line_of_file (g, "/etc/ttylinux-target");
420 if (fs->product_name == NULL)
423 if (guestfs___parse_major_minor (g, fs) == -1)
426 else if (guestfs_exists (g, "/etc/SuSE-release") > 0) {
427 fs->distro = OS_DISTRO_OPENSUSE;
429 if (parse_release_file (g, fs, "/etc/SuSE-release") == -1)
432 if (guestfs___parse_major_minor (g, fs) == -1)
437 skip_release_checks:;
439 /* Determine the architecture. */
440 check_architecture (g, fs);
442 /* We already know /etc/fstab exists because it's part of the test
443 * for Linux root above. We must now parse this file to determine
444 * which filesystems are used by the operating system and how they
447 const char *configfiles[] = { "/etc/fstab", NULL };
448 if (inspect_with_augeas (g, fs, configfiles, check_fstab) == -1)
451 /* Determine hostname. */
452 if (check_hostname_unix (g, fs) == -1)
458 /* The currently mounted device is known to be a FreeBSD root. */
460 guestfs___check_freebsd_root (guestfs_h *g, struct inspect_fs *fs)
462 fs->type = OS_TYPE_FREEBSD;
464 /* FreeBSD has no authoritative version file. The version number is
465 * in /etc/motd, which the system administrator might edit, but
466 * we'll use that anyway.
469 if (guestfs_exists (g, "/etc/motd") > 0) {
470 if (parse_release_file (g, fs, "/etc/motd") == -1)
473 if (guestfs___parse_major_minor (g, fs) == -1)
477 /* Determine the architecture. */
478 check_architecture (g, fs);
480 /* We already know /etc/fstab exists because it's part of the test above. */
481 const char *configfiles[] = { "/etc/fstab", NULL };
482 if (inspect_with_augeas (g, fs, configfiles, check_fstab) == -1)
485 /* Determine hostname. */
486 if (check_hostname_unix (g, fs) == -1)
492 /* The currently mounted device is maybe to be a *BSD root. */
494 guestfs___check_netbsd_root (guestfs_h *g, struct inspect_fs *fs)
497 if (guestfs_exists (g, "/etc/release") > 0) {
499 if (parse_release_file (g, fs, "/etc/release") == -1)
502 if (match2 (g, fs->product_name, re_netbsd, &major, &minor)) {
503 fs->type = OS_TYPE_NETBSD;
504 fs->major_version = guestfs___parse_unsigned_int (g, major);
506 if (fs->major_version == -1) {
510 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
512 if (fs->minor_version == -1)
519 /* Determine the architecture. */
520 check_architecture (g, fs);
522 /* We already know /etc/fstab exists because it's part of the test above. */
523 const char *configfiles[] = { "/etc/fstab", NULL };
524 if (inspect_with_augeas (g, fs, configfiles, check_fstab) == -1)
527 /* Determine hostname. */
528 if (check_hostname_unix (g, fs) == -1)
534 /* The currently mounted device may be a Hurd root. Hurd has distros
538 guestfs___check_hurd_root (guestfs_h *g, struct inspect_fs *fs)
542 fs->type = OS_TYPE_HURD;
544 if (guestfs_exists (g, "/etc/debian_version") > 0) {
545 fs->distro = OS_DISTRO_DEBIAN;
547 if (parse_release_file (g, fs, "/etc/debian_version") == -1)
550 if (guestfs___parse_major_minor (g, fs) == -1)
554 /* Arch Hurd also exists, but inconveniently it doesn't have
555 * the normal /etc/arch-release file. XXX
558 /* Determine the architecture. */
559 check_architecture (g, fs);
561 /* XXX Check for /etc/fstab. */
563 /* Determine hostname. */
564 if (check_hostname_unix (g, fs) == -1)
571 check_architecture (guestfs_h *g, struct inspect_fs *fs)
573 const char *binaries[] =
574 { "/bin/bash", "/bin/ls", "/bin/echo", "/bin/rm", "/bin/sh" };
577 for (i = 0; i < sizeof binaries / sizeof binaries[0]; ++i) {
578 if (guestfs_is_file (g, binaries[i]) > 0) {
579 /* Ignore errors from file_architecture call. */
580 guestfs_error_handler_cb old_error_cb = g->error_cb;
582 char *arch = guestfs_file_architecture (g, binaries[i]);
583 g->error_cb = old_error_cb;
586 /* String will be owned by handle, freed by
587 * guestfs___free_inspect_info.
596 /* Try several methods to determine the hostname from a Linux or
597 * FreeBSD guest. Note that type and distro have been set, so we can
598 * use that information to direct the search.
601 check_hostname_unix (guestfs_h *g, struct inspect_fs *fs)
606 /* Red Hat-derived would be in /etc/sysconfig/network, and
607 * Debian-derived in the file /etc/hostname. Very old Debian and
608 * SUSE use /etc/HOSTNAME. It's best to just look for each of
609 * these files in turn, rather than try anything clever based on
612 if (guestfs_is_file (g, "/etc/HOSTNAME")) {
613 fs->hostname = guestfs___first_line_of_file (g, "/etc/HOSTNAME");
614 if (fs->hostname == NULL)
617 else if (guestfs_is_file (g, "/etc/hostname")) {
618 fs->hostname = guestfs___first_line_of_file (g, "/etc/hostname");
619 if (fs->hostname == NULL)
622 else if (guestfs_is_file (g, "/etc/sysconfig/network")) {
623 const char *configfiles[] = { "/etc/sysconfig/network", NULL };
624 if (inspect_with_augeas (g, fs, configfiles,
625 check_hostname_redhat) == -1)
630 case OS_TYPE_FREEBSD:
632 /* /etc/rc.conf contains the hostname, but there is no Augeas lens
635 if (guestfs_is_file (g, "/etc/rc.conf")) {
636 if (check_hostname_freebsd (g, fs) == -1)
641 case OS_TYPE_WINDOWS: /* not here, see check_windows_system_registry */
642 case OS_TYPE_UNKNOWN:
644 /* nothing, keep GCC warnings happy */;
650 /* Parse the hostname from /etc/sysconfig/network. This must be called
651 * from the inspect_with_augeas wrapper.
654 check_hostname_redhat (guestfs_h *g, struct inspect_fs *fs)
658 /* Errors here are not fatal (RHBZ#726739), since it could be
659 * just missing HOSTNAME field in the file.
661 guestfs_error_handler_cb old_error_cb = g->error_cb;
663 hostname = guestfs_aug_get (g, "/files/etc/sysconfig/network/HOSTNAME");
664 g->error_cb = old_error_cb;
666 /* This is freed by guestfs___free_inspect_info. Note that hostname
667 * could be NULL because we ignored errors above.
669 fs->hostname = hostname;
673 /* Parse the hostname from /etc/rc.conf. On FreeBSD this file
674 * contains comments, blank lines and:
675 * hostname="freebsd8.example.com"
676 * ifconfig_re0="DHCP"
681 check_hostname_freebsd (guestfs_h *g, struct inspect_fs *fs)
683 const char *filename = "/etc/rc.conf";
688 /* Don't trust guestfs_read_lines not to break with very large files.
689 * Check the file size is something reasonable first.
691 size = guestfs_filesize (g, filename);
693 /* guestfs_filesize failed and has already set error in handle */
695 if (size > MAX_SMALL_FILE_SIZE) {
696 error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"),
701 lines = guestfs_read_lines (g, filename);
705 for (i = 0; lines[i] != NULL; ++i) {
706 if (STRPREFIX (lines[i], "hostname=\"") ||
707 STRPREFIX (lines[i], "hostname='")) {
708 size_t len = strlen (lines[i]) - 10 - 1;
709 fs->hostname = safe_strndup (g, &lines[i][10], len);
711 } else if (STRPREFIX (lines[i], "hostname=")) {
712 size_t len = strlen (lines[i]) - 9;
713 fs->hostname = safe_strndup (g, &lines[i][9], len);
718 guestfs___free_string_list (lines);
723 check_fstab (guestfs_h *g, struct inspect_fs *fs)
725 char **entries, **entry;
730 entries = guestfs_aug_match (g, "/files/etc/fstab/*[label() != '#comment']");
731 if (entries == NULL) goto error;
733 if (entries[0] == NULL) {
734 error (g, _("could not parse /etc/fstab or empty file"));
738 for (entry = entries; *entry != NULL; entry++) {
739 snprintf (augpath, sizeof augpath, "%s/spec", *entry);
740 spec = guestfs_aug_get (g, augpath);
741 if (spec == NULL) goto error;
743 snprintf (augpath, sizeof augpath, "%s/file", *entry);
744 mp = guestfs_aug_get (g, augpath);
750 r = add_fstab_entry (g, fs, spec, mp);
754 if (r == -1) goto error;
757 guestfs___free_string_list (entries);
761 if (entries) guestfs___free_string_list (entries);
765 /* Add a filesystem and possibly a mountpoint entry for
766 * the root filesystem 'fs'.
768 * 'spec' is the fstab spec field, which might be a device name or a
769 * pseudodevice or 'UUID=...' or 'LABEL=...'.
771 * 'mp' is the mount point, which could also be 'swap' or 'none'.
774 add_fstab_entry (guestfs_h *g, struct inspect_fs *fs,
775 const char *spec, const char *mp)
777 /* Ignore certain mountpoints. */
778 if (STRPREFIX (mp, "/dev/") ||
779 STREQ (mp, "/dev") ||
780 STRPREFIX (mp, "/media/") ||
781 STRPREFIX (mp, "/proc/") ||
782 STREQ (mp, "/proc") ||
783 STRPREFIX (mp, "/selinux/") ||
784 STREQ (mp, "/selinux") ||
785 STRPREFIX (mp, "/sys/") ||
789 /* Ignore /dev/fd (floppy disks) (RHBZ#642929) and CD-ROM drives. */
790 if ((STRPREFIX (spec, "/dev/fd") && c_isdigit (spec[7])) ||
791 STREQ (spec, "/dev/floppy") ||
792 STREQ (spec, "/dev/cdrom"))
795 /* Resolve UUID= and LABEL= to the actual device. */
797 if (STRPREFIX (spec, "UUID="))
798 device = guestfs_findfs_uuid (g, &spec[5]);
799 else if (STRPREFIX (spec, "LABEL="))
800 device = guestfs_findfs_label (g, &spec[6]);
801 /* Ignore "/.swap" (Pardus) and pseudo-devices like "tmpfs". */
802 else if (STREQ (spec, "/dev/root"))
803 /* Resolve /dev/root to the current device. */
804 device = safe_strdup (g, fs->device);
805 else if (STRPREFIX (spec, "/dev/"))
806 /* Resolve guest block device names. */
807 device = resolve_fstab_device (g, spec);
809 /* If we haven't resolved the device successfully by this point,
810 * we don't care, just ignore it.
815 char *mountpoint = safe_strdup (g, mp);
817 /* Add this to the fstab entry in 'fs'.
818 * Note these are further filtered by guestfs_inspect_get_mountpoints
819 * and guestfs_inspect_get_filesystems.
821 size_t n = fs->nr_fstab + 1;
822 struct inspect_fstab_entry *p;
824 p = realloc (fs->fstab, n * sizeof (struct inspect_fstab_entry));
826 perrorf (g, "realloc");
835 /* These are owned by the handle and freed by guestfs___free_inspect_info. */
836 fs->fstab[n-1].device = device;
837 fs->fstab[n-1].mountpoint = mountpoint;
839 debug (g, "fstab: device=%s mountpoint=%s", device, mountpoint);
844 /* Resolve block device name to the libguestfs device name, eg.
845 * /dev/xvdb1 => /dev/vdb1; and /dev/mapper/VG-LV => /dev/VG/LV. This
846 * assumes that disks were added in the same order as they appear to
847 * the real VM, which is a reasonable assumption to make. Return
848 * anything we don't recognize unchanged.
851 resolve_fstab_device (guestfs_h *g, const char *spec)
854 char *type, *slice, *disk, *part;
856 if (STRPREFIX (spec, "/dev/mapper/")) {
857 /* LVM2 does some strange munging on /dev/mapper paths for VGs and
858 * LVs which contain '-' character:
860 * ><fs> lvcreate LV--test VG--test 32
861 * ><fs> debug ls /dev/mapper
862 * VG----test-LV----test
864 * This makes it impossible to reverse those paths directly, so
865 * we have implemented lvm_canonical_lv_name in the daemon.
867 device = guestfs_lvm_canonical_lv_name (g, spec);
869 else if (match3 (g, spec, re_xdev, &type, &disk, &part)) {
873 char **devices = guestfs_list_devices (g);
877 /* Check any hints we were passed for a non-heuristic mapping */
878 char *name = safe_asprintf (g, "%sd%s", type, disk);
880 struct drive *drive = g->drives;
882 if (drive->name && STREQ(drive->name, name)) {
883 device = safe_asprintf (g, "%s%s", devices[i], part);
887 i++; drive = drive->next;
891 /* Guess the appliance device name if we didn't find a matching hint */
893 /* Count how many disks the libguestfs appliance has */
895 for (count = 0; devices[count] != NULL; count++)
898 /* Calculate the numerical index of the disk */
900 for (char *p = disk + 1; *p != '\0'; p++) {
905 /* Check the index makes sense wrt the number of disks the appliance has.
906 * If it does, map it to an appliance disk. */
908 device = safe_asprintf (g, "%s%s", devices[i], part);
915 guestfs___free_string_list (devices);
917 else if (match2 (g, spec, re_cciss, &disk, &part)) {
918 /* disk: (cciss/c\d+d\d+)
920 char **devices = guestfs_list_devices (g);
924 /* Check any hints we were passed for a non-heuristic mapping */
926 struct drive *drive = g->drives;
928 if (drive->name && STREQ(drive->name, disk)) {
930 device = safe_asprintf (g, "%s%s", devices[i], part);
932 device = safe_strdup (g, devices[i]);
937 i++; drive = drive->next;
940 /* We don't try to guess mappings for cciss devices */
944 guestfs___free_string_list (devices);
946 else if (match3 (g, spec, re_freebsd, &disk, &slice, &part)) {
947 /* FreeBSD disks are organized quite differently. See:
948 * http://www.freebsd.org/doc/handbook/disk-organization.html
949 * FreeBSD "partitions" are exposed as quasi-extended partitions
950 * numbered from 5 in Linux. I have no idea what happens when you
951 * have multiple "slices" (the FreeBSD term for MBR partitions).
953 int disk_i = guestfs___parse_unsigned_int (g, disk);
954 int slice_i = guestfs___parse_unsigned_int (g, slice);
955 int part_i = part[0] - 'a' /* counting from 0 */;
960 if (disk_i != -1 && disk_i <= 26 &&
961 slice_i > 0 && slice_i <= 1 /* > 4 .. see comment above */ &&
962 part_i >= 0 && part_i < 26) {
963 device = safe_asprintf (g, "/dev/sd%c%d", disk_i + 'a', part_i + 5);
967 /* Didn't match device pattern, return original spec unchanged. */
969 device = safe_strdup (g, spec);
974 /* Call 'f' with Augeas opened and having parsed 'filename' (this file
975 * must exist). As a security measure, this bails if the file is too
976 * large for a reasonable configuration file. After the call to 'f'
980 inspect_with_augeas (guestfs_h *g, struct inspect_fs *fs,
981 const char **configfiles,
982 int (*f) (guestfs_h *, struct inspect_fs *))
984 /* Security: Refuse to do this if a config file is too large. */
985 for (const char **i = configfiles; *i != NULL; i++) {
986 if (guestfs_exists(g, *i) == 0) continue;
988 int64_t size = guestfs_filesize (g, *i);
990 /* guestfs_filesize failed and has already set error in handle */
992 if (size > MAX_AUGEAS_FILE_SIZE) {
993 error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"),
999 /* If !feature_available (g, "augeas") then the next call will fail.
1000 * Arguably we might want to fall back to a non-Augeas method in
1003 if (guestfs_aug_init (g, "/", 16|32) == -1)
1008 /* Tell Augeas to only load one file (thanks Raphaƫl Pinson). */
1009 #define AUGEAS_LOAD "/augeas/load//incl[. != \""
1010 #define AUGEAS_LOAD_LEN (strlen(AUGEAS_LOAD))
1011 size_t conflen = strlen(configfiles[0]);
1012 size_t buflen = AUGEAS_LOAD_LEN + conflen + 1 /* Closing " */;
1013 char *buf = safe_malloc(g, buflen + 2 /* Closing ] + null terminator */);
1015 memcpy(buf, AUGEAS_LOAD, AUGEAS_LOAD_LEN);
1016 memcpy(buf + AUGEAS_LOAD_LEN, configfiles[0], conflen);
1017 buf[buflen - 1] = '"';
1018 #undef AUGEAS_LOAD_LEN
1021 #define EXCL " and . != \""
1022 #define EXCL_LEN (strlen(EXCL))
1023 for (const char **i = &configfiles[1]; *i != NULL; i++) {
1024 size_t orig_buflen = buflen;
1025 conflen = strlen(*i);
1026 buflen += EXCL_LEN + conflen + 1 /* Closing " */;
1027 buf = safe_realloc(g, buf, buflen + 2 /* Closing ] + null terminator */);
1028 char *s = buf + orig_buflen;
1030 memcpy(s, EXCL, EXCL_LEN);
1031 memcpy(s + EXCL_LEN, *i, conflen);
1032 buf[buflen - 1] = '"';
1038 buf[buflen + 1] = '\0';
1040 if (guestfs_aug_rm (g, buf) == -1) {
1046 if (guestfs_aug_load (g) == -1)
1052 guestfs_aug_close (g);
1057 #endif /* defined(HAVE_HIVEX) */