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_first_partition;
55 static pcre *re_major_minor;
57 static void compile_regexps (void) __attribute__((constructor));
58 static void free_regexps (void) __attribute__((destructor));
61 compile_regexps (void)
66 #define COMPILE(re,pattern,options) \
68 re = pcre_compile ((pattern), (options), &err, &offset, NULL); \
70 ignore_value (write (2, err, strlen (err))); \
75 COMPILE (re_first_partition, "^/dev/(?:h|s|v)d.1$", 0);
76 COMPILE (re_major_minor, "(\\d+)\\.(\\d+)", 0);
82 pcre_free (re_first_partition);
83 pcre_free (re_major_minor);
86 static int check_filesystem (guestfs_h *g, const char *device, int is_block, int is_partnum);
87 static void check_package_format (guestfs_h *g, struct inspect_fs *fs);
88 static void check_package_management (guestfs_h *g, struct inspect_fs *fs);
89 static int extend_fses (guestfs_h *g);
91 /* Find out if 'device' contains a filesystem. If it does, add
92 * another entry in g->fses.
95 guestfs___check_for_filesystem_on (guestfs_h *g, const char *device,
96 int is_block, int is_partnum)
98 /* Get vfs-type in order to check if it's a Linux(?) swap device.
99 * If there's an error we should ignore it, so to do that we have to
100 * temporarily replace the error handler with a null one.
102 guestfs_error_handler_cb old_error_cb = g->error_cb;
104 char *vfs_type = guestfs_vfs_type (g, device);
105 g->error_cb = old_error_cb;
107 int is_swap = vfs_type && STREQ (vfs_type, "swap");
109 debug (g, "check_for_filesystem_on: %s %d %d (%s)",
110 device, is_block, is_partnum,
111 vfs_type ? vfs_type : "failed to get vfs type");
115 if (extend_fses (g) == -1)
117 g->fses[g->nr_fses-1].is_swap = 1;
121 /* Try mounting the device. As above, ignore errors. */
123 int r = guestfs_mount_ro (g, device, "/");
124 if (r == -1 && vfs_type && STREQ (vfs_type, "ufs")) /* Hack for the *BSDs. */
125 r = guestfs_mount_vfs (g, "ro,ufstype=ufs2", "ufs", device, "/");
127 g->error_cb = old_error_cb;
131 /* Do the rest of the checks. */
132 r = check_filesystem (g, device, is_block, is_partnum);
134 /* Unmount the filesystem. */
135 if (guestfs_umount_all (g) == -1)
141 /* is_block and is_partnum are just hints: is_block is true if the
142 * filesystem is a whole block device (eg. /dev/sda). is_partnum
143 * is > 0 if the filesystem is a direct partition, and in this case
144 * it is the partition number counting from 1
145 * (eg. /dev/sda1 => is_partnum == 1).
148 check_filesystem (guestfs_h *g, const char *device,
149 int is_block, int is_partnum)
151 if (extend_fses (g) == -1)
154 struct inspect_fs *fs = &g->fses[g->nr_fses-1];
156 fs->device = safe_strdup (g, device);
157 fs->is_mountable = 1;
159 /* Optimize some of the tests by avoiding multiple tests of the same thing. */
160 int is_dir_etc = guestfs_is_dir (g, "/etc") > 0;
161 int is_dir_bin = guestfs_is_dir (g, "/bin") > 0;
162 int is_dir_share = guestfs_is_dir (g, "/share") > 0;
165 if (guestfs_is_file (g, "/grub/menu.lst") > 0 ||
166 guestfs_is_file (g, "/grub/grub.conf") > 0)
167 fs->content = FS_CONTENT_LINUX_BOOT;
169 else if (is_dir_etc &&
171 guestfs_is_file (g, "/etc/freebsd-update.conf") > 0 &&
172 guestfs_is_file (g, "/etc/fstab") > 0) {
173 /* Ignore /dev/sda1 which is a shadow of the real root filesystem
174 * that is probably /dev/sda5 (see:
175 * http://www.freebsd.org/doc/handbook/disk-organization.html)
177 if (match (g, device, re_first_partition))
181 fs->content = FS_CONTENT_FREEBSD_ROOT;
182 fs->format = OS_FORMAT_INSTALLED;
183 if (guestfs___check_freebsd_root (g, fs) == -1)
187 else if (is_dir_etc &&
189 guestfs_is_file (g, "/etc/fstab") > 0) {
191 fs->content = FS_CONTENT_LINUX_ROOT;
192 fs->format = OS_FORMAT_INSTALLED;
193 if (guestfs___check_linux_root (g, fs) == -1)
196 /* Linux /usr/local? */
197 else if (is_dir_etc &&
200 guestfs_exists (g, "/local") == 0 &&
201 guestfs_is_file (g, "/etc/fstab") == 0)
202 fs->content = FS_CONTENT_LINUX_USR_LOCAL;
204 else if (is_dir_etc &&
207 guestfs_exists (g, "/local") > 0 &&
208 guestfs_is_file (g, "/etc/fstab") == 0)
209 fs->content = FS_CONTENT_LINUX_USR;
211 else if (guestfs_is_dir (g, "/log") > 0 &&
212 guestfs_is_dir (g, "/run") > 0 &&
213 guestfs_is_dir (g, "/spool") > 0)
214 fs->content = FS_CONTENT_LINUX_VAR;
216 else if (guestfs___has_windows_systemroot (g) >= 0) {
218 fs->content = FS_CONTENT_WINDOWS_ROOT;
219 fs->format = OS_FORMAT_INSTALLED;
220 if (guestfs___check_windows_root (g, fs) == -1)
223 /* Windows volume with installed applications (but not root)? */
224 else if (guestfs___is_dir_nocase (g, "/System Volume Information") > 0 &&
225 guestfs___is_dir_nocase (g, "/Program Files") > 0)
226 fs->content = FS_CONTENT_WINDOWS_VOLUME_WITH_APPS;
227 /* Windows volume (but not root)? */
228 else if (guestfs___is_dir_nocase (g, "/System Volume Information") > 0)
229 fs->content = FS_CONTENT_WINDOWS_VOLUME;
230 /* Install CD/disk? Skip these checks if it's not a whole device
231 * (eg. CD) or the first partition (eg. bootable USB key).
233 else if ((is_block || is_partnum == 1) &&
234 (guestfs_is_file (g, "/isolinux/isolinux.cfg") > 0 ||
235 guestfs_is_dir (g, "/EFI/BOOT") > 0 ||
236 guestfs_is_file (g, "/images/install.img") > 0 ||
237 guestfs_is_dir (g, "/.disk") > 0 ||
238 guestfs_is_file (g, "/.discinfo") > 0 ||
239 guestfs_is_file (g, "/i386/txtsetup.sif") > 0 ||
240 guestfs_is_file (g, "/amd64/txtsetup.sif")) > 0) {
242 fs->content = FS_CONTENT_INSTALLER;
243 fs->format = OS_FORMAT_INSTALLER;
244 if (guestfs___check_installer_root (g, fs) == -1)
248 /* The above code should have set fs->type and fs->distro fields, so
249 * we can now guess the package management system.
251 check_package_format (g, fs);
252 check_package_management (g, fs);
258 extend_fses (guestfs_h *g)
260 size_t n = g->nr_fses + 1;
261 struct inspect_fs *p;
263 p = realloc (g->fses, n * sizeof (struct inspect_fs));
265 perrorf (g, "realloc");
272 memset (&g->fses[n-1], 0, sizeof (struct inspect_fs));
278 guestfs___is_file_nocase (guestfs_h *g, const char *path)
283 p = guestfs___case_sensitive_path_silently (g, path);
286 r = guestfs_is_file (g, p);
292 guestfs___is_dir_nocase (guestfs_h *g, const char *path)
297 p = guestfs___case_sensitive_path_silently (g, path);
300 r = guestfs_is_dir (g, p);
305 /* Parse small, unsigned ints, as used in version numbers. */
307 guestfs___parse_unsigned_int (guestfs_h *g, const char *str)
310 int r = xstrtol (str, NULL, 10, &ret, "");
311 if (r != LONGINT_OK) {
312 error (g, _("could not parse integer in version number: %s"), str);
318 /* Like parse_unsigned_int, but ignore trailing stuff. */
320 guestfs___parse_unsigned_int_ignore_trailing (guestfs_h *g, const char *str)
323 int r = xstrtol (str, NULL, 10, &ret, NULL);
324 if (r != LONGINT_OK) {
325 error (g, _("could not parse integer in version number: %s"), str);
331 /* Parse generic MAJOR.MINOR from the fs->product_name string. */
333 guestfs___parse_major_minor (guestfs_h *g, struct inspect_fs *fs)
337 if (match2 (g, fs->product_name, re_major_minor, &major, &minor)) {
338 fs->major_version = guestfs___parse_unsigned_int (g, major);
340 if (fs->major_version == -1) {
344 fs->minor_version = guestfs___parse_unsigned_int (g, minor);
346 if (fs->minor_version == -1)
352 /* At the moment, package format and package management is just a
353 * simple function of the distro and major_version fields, so these
354 * can never return an error. We might be cleverer in future.
357 check_package_format (guestfs_h *g, struct inspect_fs *fs)
359 switch (fs->distro) {
360 case OS_DISTRO_FEDORA:
361 case OS_DISTRO_MEEGO:
362 case OS_DISTRO_REDHAT_BASED:
364 case OS_DISTRO_MANDRIVA:
365 case OS_DISTRO_CENTOS:
366 case OS_DISTRO_SCIENTIFIC_LINUX:
367 fs->package_format = OS_PACKAGE_FORMAT_RPM;
370 case OS_DISTRO_DEBIAN:
371 case OS_DISTRO_UBUNTU:
372 case OS_DISTRO_LINUX_MINT:
373 fs->package_format = OS_PACKAGE_FORMAT_DEB;
376 case OS_DISTRO_ARCHLINUX:
377 fs->package_format = OS_PACKAGE_FORMAT_PACMAN;
379 case OS_DISTRO_GENTOO:
380 fs->package_format = OS_PACKAGE_FORMAT_EBUILD;
382 case OS_DISTRO_PARDUS:
383 fs->package_format = OS_PACKAGE_FORMAT_PISI;
386 case OS_DISTRO_SLACKWARE:
387 case OS_DISTRO_WINDOWS:
388 case OS_DISTRO_UNKNOWN:
390 fs->package_format = OS_PACKAGE_FORMAT_UNKNOWN;
396 check_package_management (guestfs_h *g, struct inspect_fs *fs)
398 switch (fs->distro) {
399 case OS_DISTRO_FEDORA:
400 case OS_DISTRO_MEEGO:
401 fs->package_management = OS_PACKAGE_MANAGEMENT_YUM;
404 case OS_DISTRO_REDHAT_BASED:
406 case OS_DISTRO_CENTOS:
407 case OS_DISTRO_SCIENTIFIC_LINUX:
408 if (fs->major_version >= 5)
409 fs->package_management = OS_PACKAGE_MANAGEMENT_YUM;
411 fs->package_management = OS_PACKAGE_MANAGEMENT_UP2DATE;
414 case OS_DISTRO_DEBIAN:
415 case OS_DISTRO_UBUNTU:
416 case OS_DISTRO_LINUX_MINT:
417 fs->package_management = OS_PACKAGE_MANAGEMENT_APT;
420 case OS_DISTRO_ARCHLINUX:
421 fs->package_management = OS_PACKAGE_MANAGEMENT_PACMAN;
423 case OS_DISTRO_GENTOO:
424 fs->package_management = OS_PACKAGE_MANAGEMENT_PORTAGE;
426 case OS_DISTRO_PARDUS:
427 fs->package_management = OS_PACKAGE_MANAGEMENT_PISI;
429 case OS_DISTRO_MANDRIVA:
430 fs->package_management = OS_PACKAGE_MANAGEMENT_URPMI;
433 case OS_DISTRO_SLACKWARE:
434 case OS_DISTRO_WINDOWS:
435 case OS_DISTRO_UNKNOWN:
437 fs->package_management = OS_PACKAGE_MANAGEMENT_UNKNOWN;
442 /* Get the first line of a small file, without any trailing newline
446 guestfs___first_line_of_file (guestfs_h *g, const char *filename)
452 /* Don't trust guestfs_head_n not to break with very large files.
453 * Check the file size is something reasonable first.
455 size = guestfs_filesize (g, filename);
457 /* guestfs_filesize failed and has already set error in handle */
459 if (size > MAX_SMALL_FILE_SIZE) {
460 error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"),
465 lines = guestfs_head_n (g, 1, filename);
468 if (lines[0] == NULL) {
469 error (g, _("%s: file is empty"), filename);
470 guestfs___free_string_list (lines);
473 /* lines[1] should be NULL because of '1' argument above ... */
475 ret = lines[0]; /* caller frees */
476 free (lines); /* free the array */
481 /* Get the first matching line (using guestfs_egrep{,i}) of a small file,
482 * without any trailing newline character.
484 * Returns: 1 = returned a line (in *ret)
489 guestfs___first_egrep_of_file (guestfs_h *g, const char *filename,
490 const char *eregex, int iflag, char **ret)
496 /* Don't trust guestfs_egrep not to break with very large files.
497 * Check the file size is something reasonable first.
499 size = guestfs_filesize (g, filename);
501 /* guestfs_filesize failed and has already set error in handle */
503 if (size > MAX_SMALL_FILE_SIZE) {
504 error (g, _("size of %s is unreasonably large (%" PRIi64 " bytes)"),
509 lines = (!iflag ? guestfs_egrep : guestfs_egrepi) (g, eregex, filename);
512 if (lines[0] == NULL) {
513 guestfs___free_string_list (lines);
517 *ret = lines[0]; /* caller frees */
519 /* free up any other matches and the array itself */
520 for (i = 1; lines[i] != NULL; ++i)
527 #endif /* defined(HAVE_HIVEX) */