[Libguestfs] [PATCH 1/4] inspect_os: Add support for detecting OpenBSD
Nikos Skalkotos
skalkoto at grnet.gr
Wed Dec 3 14:10:48 UTC 2014
Signed-off-by: Nikos Skalkotos <skalkoto at grnet.gr>
---
src/guestfs-internal.h | 1 +
src/inspect-fs-unix.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++--
src/inspect-fs.c | 12 ++++++
3 files changed, 116 insertions(+), 3 deletions(-)
diff --git a/src/guestfs-internal.h b/src/guestfs-internal.h
index 33d28f5..c8dd084 100644
--- a/src/guestfs-internal.h
+++ b/src/guestfs-internal.h
@@ -782,6 +782,7 @@ extern void guestfs___check_package_management (guestfs_h *g, struct inspect_fs
extern int guestfs___check_linux_root (guestfs_h *g, struct inspect_fs *fs);
extern int guestfs___check_freebsd_root (guestfs_h *g, struct inspect_fs *fs);
extern int guestfs___check_netbsd_root (guestfs_h *g, struct inspect_fs *fs);
+extern int guestfs___check_openbsd_root (guestfs_h *g, struct inspect_fs *fs);
extern int guestfs___check_hurd_root (guestfs_h *g, struct inspect_fs *fs);
extern int guestfs___check_minix_root (guestfs_h *g, struct inspect_fs *fs);
diff --git a/src/inspect-fs-unix.c b/src/inspect-fs-unix.c
index f55e53b..ab76bc6 100644
--- a/src/inspect-fs-unix.c
+++ b/src/inspect-fs-unix.c
@@ -80,6 +80,9 @@ COMPILE_REGEXP (re_sles_version, "^VERSION = (\\d+)", 0)
COMPILE_REGEXP (re_sles_patchlevel, "^PATCHLEVEL = (\\d+)", 0)
COMPILE_REGEXP (re_minix, "^(\\d+)\\.(\\d+)(\\.(\\d+))?", 0)
COMPILE_REGEXP (re_hurd_dev, "^/dev/(h)d(\\d+)s(\\d+)$", 0)
+COMPILE_REGEXP (re_openbsd, "^OpenBSD (\\d+|\\?)\\.(\\d+|\\?)", 0)
+COMPILE_REGEXP (re_openbsd_duid, "^[0-9a-f]{16}\\.[a-z]", 0)
+COMPILE_REGEXP (re_openbsd_dev, "^/dev/(s|w)d([0-9])([a-z])$", 0)
static void check_architecture (guestfs_h *g, struct inspect_fs *fs);
static int check_hostname_unix (guestfs_h *g, struct inspect_fs *fs);
@@ -659,6 +662,55 @@ guestfs___check_netbsd_root (guestfs_h *g, struct inspect_fs *fs)
return 0;
}
+/* The currently mounted device may be an OpenBSD root. */
+int
+guestfs___check_openbsd_root (guestfs_h *g, struct inspect_fs *fs)
+{
+ if (guestfs_is_file_opts (g, "/etc/motd",
+ GUESTFS_IS_FILE_OPTS_FOLLOWSYMLINKS, 1, -1) > 0) {
+ CLEANUP_FREE char *major = NULL, *minor = NULL;
+
+ /* The first line of this file gets automatically updated at boot. */
+ if (parse_release_file (g, fs, "/etc/motd") == -1)
+ return -1;
+
+ if (match2 (g, fs->product_name, re_openbsd, &major, &minor)) {
+ fs->type = OS_TYPE_OPENBSD;
+ fs->distro = OS_DISTRO_OPENBSD;
+
+ /* Before the first boot, the first line will look like this:
+ *
+ * OpenBSD ?.? (UNKNOWN)
+ */
+ if ((fs->product_name[8] != '?') && (fs->product_name[10] != '?')) {
+ fs->major_version = guestfs___parse_unsigned_int (g, major);
+ if (fs->major_version == -1)
+ return -1;
+
+ fs->minor_version = guestfs___parse_unsigned_int (g, minor);
+ if (fs->minor_version == -1)
+ return -1;
+ }
+ }
+ } else {
+ return -1;
+ }
+
+ /* Determine the architecture. */
+ check_architecture (g, fs);
+
+ /* We already know /etc/fstab exists because it's part of the test above. */
+ const char *configfiles[] = { "/etc/fstab", NULL };
+ if (inspect_with_augeas (g, fs, configfiles, check_fstab) == -1)
+ return -1;
+
+ /* Determine hostname. */
+ if (check_hostname_unix (g, fs) == -1)
+ return -1;
+
+ return 0;
+}
+
/* The currently mounted device may be a Hurd root. Hurd has distros
* just like Linux.
*/
@@ -821,6 +873,18 @@ check_hostname_unix (guestfs_h *g, struct inspect_fs *fs)
}
break;
+ case OS_TYPE_OPENBSD:
+ if (guestfs_is_file (g, "/etc/myname")) {
+ fs->hostname = guestfs___first_line_of_file (g, "/etc/myname");
+ if (fs->hostname == NULL)
+ return -1;
+ if (STREQ (fs->hostname, "")) {
+ free (fs->hostname);
+ fs->hostname = NULL;
+ }
+ }
+ break;
+
case OS_TYPE_MINIX:
if (guestfs_is_file (g, "/etc/hostname.file")) {
fs->hostname = guestfs___first_line_of_file (g, "/etc/hostname.file");
@@ -835,7 +899,6 @@ check_hostname_unix (guestfs_h *g, struct inspect_fs *fs)
case OS_TYPE_WINDOWS: /* not here, see check_windows_system_registry */
case OS_TYPE_DOS:
- case OS_TYPE_OPENBSD:
case OS_TYPE_UNKNOWN:
/* nothing */;
}
@@ -921,6 +984,9 @@ check_fstab (guestfs_h *g, struct inspect_fs *fs)
char **entry;
char augpath[256];
CLEANUP_HASH_FREE Hash_table *md_map = NULL;
+ bool is_bsd = (fs->type == OS_TYPE_FREEBSD ||
+ fs->type == OS_TYPE_NETBSD ||
+ fs->type == OS_TYPE_OPENBSD);
/* Generate a map of MD device paths listed in /etc/mdadm.conf to MD device
* paths in the guestfs appliance */
@@ -975,12 +1041,31 @@ check_fstab (guestfs_h *g, struct inspect_fs *fs)
else if (STRPREFIX (spec, "LABEL="))
mountable = guestfs_findfs_label (g, &spec[6]);
/* Ignore "/.swap" (Pardus) and pseudo-devices like "tmpfs". */
- else if (STREQ (spec, "/dev/root"))
- /* Resolve /dev/root to the current device. */
+ else if (STREQ (spec, "/dev/root") || (is_bsd && STREQ (mp, "/")))
+ /* Resolve /dev/root to the current device.
+ * Do the same for the / partition of the *BSD systems, since the
+ * BSD -> Linux device translation is not straight forward.
+ */
mountable = safe_strdup (g, fs->mountable);
else if (STRPREFIX (spec, "/dev/"))
/* Resolve guest block device names. */
mountable = resolve_fstab_device (g, spec, md_map);
+ else if (match (g, spec, re_openbsd_duid)) {
+ /* In OpenBSD's fstab you can specify partitions on a disk by appending a
+ * period and a partition letter to a Disklable Unique Identifier. The
+ * DUID is a 16 hex digit field found in the OpenBSD's altered BSD
+ * disklabel. For more info see here:
+ * http://www.openbsd.org/faq/faq14.html#intro
+ */
+ char device[10]; /* /dev/sd[0-9][a-z] */
+ char part = spec[17];
+
+ /* We cannot peep into disklables, we can only assume that this is the
+ * first disk.
+ */
+ snprintf(device, 10, "%s%c", "/dev/sd0", part);
+ mountable = resolve_fstab_device (g, device, md_map);
+ }
/* If we haven't resolved the device successfully by this point,
* we don't care, just ignore it.
@@ -1542,6 +1627,21 @@ resolve_fstab_device (guestfs_h *g, const char *spec, Hash_table *md_map)
device = safe_asprintf (g, "/dev/sd%c%d", disk_i + 'a', part_i + 5);
}
}
+ else if (match3 (g, spec, re_openbsd_dev, &type, &disk, &part)) {
+ int disk_i = guestfs___parse_unsigned_int (g, disk);
+ int part_i = part[0] - 'a'; /* counting from 0 */
+ free (type);
+ free (disk);
+ free (part);
+
+ if (part_i > 2)
+ /* Partition 'c' is the hard disk itself. Not mapped under Linux */
+ part_i -= 1;
+
+ /* In OpenBSD MAXPARTITIONS is defined to 16 for all architectures */
+ if (disk_i != -1 && part_i >= 0 && part_i < 15)
+ device = safe_asprintf (g, "/dev/sd%c%d", disk_i + 'a', part_i + 5);
+ }
else if ((part = match1 (g, spec, re_diskbyid)) != NULL) {
r = resolve_fstab_device_diskbyid (g, part, &device);
free (part);
diff --git a/src/inspect-fs.c b/src/inspect-fs.c
index fe82132..aaddb49 100644
--- a/src/inspect-fs.c
+++ b/src/inspect-fs.c
@@ -177,6 +177,7 @@ check_filesystem (guestfs_h *g, const char *mountable,
if (guestfs___check_freebsd_root (g, fs) == -1)
return -1;
}
+ /* NetBSD root? */
else if (is_dir_etc &&
is_dir_bin &&
guestfs_is_file (g, "/netbsd") > 0 &&
@@ -187,6 +188,17 @@ check_filesystem (guestfs_h *g, const char *mountable,
if (guestfs___check_netbsd_root (g, fs) == -1)
return -1;
}
+ /* OpenBSD root? */
+ else if (is_dir_etc &&
+ is_dir_bin &&
+ guestfs_is_file (g, "/bsd") > 0 &&
+ guestfs_is_file (g, "/etc/fstab") > 0 &&
+ guestfs_is_file (g, "/etc/motd") > 0) {
+ fs->is_root = 1;
+ fs->format = OS_FORMAT_INSTALLED;
+ if (guestfs___check_openbsd_root (g, fs) == -1)
+ return -1;
+ }
/* Hurd root? */
else if (guestfs_is_file (g, "/hurd/console") > 0 &&
guestfs_is_file (g, "/hurd/hello") > 0 &&
--
2.1.3
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