/*
- * vol_id - udev callout to read filesystem label and uuid
+ * vol_id - read filesystem label and uuid
*
- * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2005-2008 Kay Sievers <kay.sievers@vrfy.org>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
*
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _GNU_SOURCE
#include <unistd.h>
#include <string.h>
#include <ctype.h>
+#include <errno.h>
+#include <pwd.h>
#include <grp.h>
+#include <getopt.h>
+#include <fcntl.h>
#include <sys/ioctl.h>
-#include "../../udev.h"
-#include "libvolume_id/libvolume_id.h"
+#include "../../udev/udev.h"
+#include "lib/libvolume_id.h"
#define BLKGETSIZE64 _IOR(0x12,114,size_t)
-#ifdef USE_LOG
-void log_message(int priority, const char *format, ...)
-{
- va_list args;
- static int udev_log = -1;
-
- if (udev_log == -1) {
- const char *value;
+static int debug;
- value = getenv("UDEV_LOG");
- if (value)
- udev_log = log_priority(value);
- else
- udev_log = LOG_ERR;
+static void log_fn(struct udev *udev, int priority,
+ const char *file, int line, const char *fn,
+ const char *format, va_list args)
+{
+ if (debug) {
+ fprintf(stderr, "%s: ", fn != NULL ? fn : file);
+ vfprintf(stderr, format, args);
+ } else {
+ vsyslog(priority, format, args);
}
-
- if (priority > udev_log)
- return;
-
- va_start(args, format);
- vsyslog(priority, format, args);
- va_end(args);
}
-#endif
static void vid_log(int priority, const char *file, int line, const char *format, ...)
{
-#ifdef USE_LOG
va_list args;
va_start(args, format);
- log_message(priority, format, args);
+ log_fn(NULL, priority, file, line, NULL, format, args);
va_end(args);
-#endif
return;
}
to[j] = '\0';
}
+static int all_probers(volume_id_probe_fn_t probe_fn,
+ struct volume_id *id, uint64_t off, uint64_t size,
+ void *data)
+{
+ const char *type;
+
+ if (probe_fn(id, off, size) == 0)
+ if (volume_id_get_type(id, &type))
+ printf("%s\n", type);
+
+ return 0;
+}
+
int main(int argc, char *argv[])
{
- const char help[] = "usage: vol_id [--export|-t|-l|-u] <device>\n"
- " --export\n"
- " -t filesystem type\n"
- " -l filesystem label\n"
- " -u filesystem uuid\n"
- "\n";
+ struct udev *udev;
+ static const struct option options[] = {
+ { "label", 0, NULL, 'l' },
+ { "label-raw", 0, NULL, 'L' },
+ { "uuid", 0, NULL, 'u' },
+ { "type", 0, NULL, 't' },
+ { "export", 0, NULL, 'x' },
+ { "skip-raid", 0, NULL, 's' },
+ { "probe-all", 0, NULL, 'a' },
+ { "offset", 2, NULL, 'o' },
+ { "debug", 0, NULL, 'd' },
+ { "help", 0, NULL, 'h' },
+ {}
+ };
+
enum print_type {
PRINT_EXPORT,
PRINT_TYPE,
PRINT_LABEL,
PRINT_UUID,
+ PRINT_LABEL_RAW,
} print = PRINT_EXPORT;
+
struct volume_id *vid = NULL;
- static char name[VOLUME_ID_LABEL_SIZE];
- int i;
+ char label_safe[256];
+ char label_enc[256];
+ char uuid_enc[256];
uint64_t size;
- const char *node = NULL;
- uid_t nobody_uid;
- gid_t nobody_gid;
+ int skip_raid = 0;
+ int probe_all = 0;
+ uint64_t offset = 0;
+ const char *node;
+ int fd;
+ const char *label, *uuid, *type, *type_version, *usage;
+ int retval;
int rc = 0;
+ udev = udev_new();
+ if (udev == NULL)
+ goto exit;
logging_init("vol_id");
+ udev_set_log_fn(udev, log_fn);
/* hook in our debug into libvolume_id */
- volume_id_log = vid_log;
+ volume_id_log_fn = vid_log;
- for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
+ while (1) {
+ int option;
- if (strcmp(arg, "--export") == 0) {
- print = PRINT_EXPORT;
- } else if (strcmp(arg, "-t") == 0) {
- print = PRINT_TYPE;
- } else if (strcmp(arg, "-l") == 0) {
+ option = getopt_long(argc, argv, "lLutxsaodh", options, NULL);
+ if (option == -1)
+ break;
+
+ switch (option) {
+ case 'd':
+ debug = 1;
+ if (udev_get_log_priority(udev) < LOG_INFO)
+ udev_set_log_priority(udev, LOG_INFO);
+ break;
+ case 'l':
print = PRINT_LABEL;
- } else if (strcmp(arg, "-u") == 0) {
+ break;
+ case 'L':
+ print = PRINT_LABEL_RAW;
+ break;
+ case 'u':
print = PRINT_UUID;
- } else
- node = arg;
+ break;
+ case 't':
+ print = PRINT_TYPE;
+ break;
+ case 'x':
+ print = PRINT_EXPORT;
+ break;
+ case 's':
+ skip_raid = 1;
+ break;
+ case 'a':
+ probe_all = 1;
+ break;
+ case 'o':
+ if (optarg[0] != '\0')
+ offset = strtoull(optarg, NULL, 0);
+ break;
+ case 'h':
+ printf("Usage: vol_id [options] <device>\n"
+ " --export export key/value pairs\n"
+ " --type filesystem type\n"
+ " --label filesystem label\n"
+ " --label-raw raw label\n"
+ " --uuid filesystem uuid\n"
+ " --skip-raid don't probe for raid\n"
+ " --probe-all find possibly conflicting signatures\n"
+ " --offset=<bytes> probe at the given offset\n"
+ " --debug print debug output to stderr\n"
+ " --help\n\n");
+ goto exit;
+ default:
+ retval = 1;
+ goto exit;
+ }
}
+
+ node = argv[optind];
if (!node) {
- err("no node specified");
- fprintf(stderr, help);
+ err(udev, "no device\n");
+ fprintf(stderr, "no device\n");
rc = 1;
goto exit;
}
- vid = volume_id_open_node(node);
+ fd = open(node, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "%s: error opening volume\n", node);
+ rc = 2;
+ goto exit;
+ }
+
+ vid = volume_id_open_fd(fd);
if (vid == NULL) {
- fprintf(stderr, "%s: error open volume\n", node);
rc = 2;
goto exit;
}
- if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0)
+ if (ioctl(fd, BLKGETSIZE64, &size) != 0)
size = 0;
- dbg("BLKGETSIZE64=%llu", size);
-
- /* drop all privileges */
- nobody_uid = lookup_user("nobody");
- nobody_gid = lookup_group("nogroup");
- if (nobody_uid > 0 && nobody_gid > 0) {
- if (setgroups(0, NULL) != 0 ||
- setgid(nobody_gid) != 0 ||
- setuid(nobody_uid) != 0) {
- rc = 3;
- goto exit;
+ info(udev, "BLKGETSIZE64=%llu (%lluGB)\n", (unsigned long long)size, (unsigned long long)size >> 30);
+
+ /* try to drop all privileges before reading disk content */
+ if (getuid() == 0) {
+ struct passwd *pw;
+
+ pw = getpwnam("nobody");
+ if (pw != NULL && pw->pw_uid > 0 && pw->pw_gid > 0) {
+ if (setgroups(0, NULL) != 0 ||
+ setgid(pw->pw_gid) != 0 ||
+ setuid(pw->pw_uid) != 0)
+ info(udev, "unable to drop privileges: %s\n\n", strerror(errno));
}
}
- if (volume_id_probe_all(vid, 0, size) == 0)
- goto print;
+ if (probe_all) {
+ volume_id_all_probers(all_probers, vid, offset, size, NULL);
+ goto exit;
+ }
- if (print != PRINT_EXPORT)
+ if (skip_raid)
+ retval = volume_id_probe_filesystem(vid, offset, size);
+ else
+ retval = volume_id_probe_all(vid, offset, size);
+ if (retval != 0) {
fprintf(stderr, "%s: unknown volume type\n", node);
- rc = 4;
- goto exit;
+ rc = 4;
+ goto exit;
+ }
+
+ if (!volume_id_get_label(vid, &label) ||
+ !volume_id_get_usage(vid, &usage) ||
+ !volume_id_get_type(vid, &type) ||
+ !volume_id_get_type_version(vid, &type_version) ||
+ !volume_id_get_uuid(vid, &uuid)) {
+ rc = 4;
+ goto exit;
+ }
-print:
- set_str(name, vid->label, sizeof(vid->label));
- replace_untrusted_chars(name);
+ set_str(label_safe, label, sizeof(label_safe));
+ replace_chars(label_safe, ALLOWED_CHARS_INPUT);
+
+ volume_id_encode_string(label, label_enc, sizeof(label_enc));
+ volume_id_encode_string(uuid, uuid_enc, sizeof(uuid_enc));
switch (print) {
case PRINT_EXPORT:
- printf("ID_FS_USAGE=%s\n", vid->usage);
- printf("ID_FS_TYPE=%s\n", vid->type);
- printf("ID_FS_VERSION=%s\n", vid->type_version);
- printf("ID_FS_UUID=%s\n", vid->uuid);
- printf("ID_FS_LABEL=%s\n", vid->label);
- printf("ID_FS_LABEL_SAFE=%s\n", name);
+ printf("ID_FS_USAGE=%s\n", usage);
+ printf("ID_FS_TYPE=%s\n", type);
+ printf("ID_FS_VERSION=%s\n", type_version);
+ printf("ID_FS_UUID=%s\n", uuid);
+ printf("ID_FS_UUID_ENC=%s\n", uuid_enc);
+ printf("ID_FS_LABEL=%s\n", label);
+ printf("ID_FS_LABEL_ENC=%s\n", label_enc);
+ printf("ID_FS_LABEL_SAFE=%s\n", label_safe);
break;
case PRINT_TYPE:
- printf("%s\n", vid->type);
+ printf("%s\n", type);
break;
case PRINT_LABEL:
- if (name[0] == '\0' ||
- (vid->usage_id != VOLUME_ID_FILESYSTEM && vid->usage_id != VOLUME_ID_DISKLABEL)) {
+ if (label_safe[0] == '\0' || strcmp(usage, "raid") == 0) {
rc = 3;
goto exit;
}
- printf("%s\n", name);
+ printf("%s\n", label_safe);
break;
case PRINT_UUID:
- if (vid->uuid[0] == '\0' || vid->usage_id != VOLUME_ID_FILESYSTEM) {
+ if (uuid_enc[0] == '\0' || strcmp(usage, "raid") == 0) {
rc = 4;
goto exit;
}
- printf("%s\n", vid->uuid);
+ printf("%s\n", uuid_enc);
+ break;
+ case PRINT_LABEL_RAW:
+ if (label[0] == '\0' || strcmp(usage, "raid") == 0) {
+ rc = 3;
+ goto exit;
+ }
+ printf("%s\n", label);
break;
}
exit:
if (vid != NULL)
volume_id_close(vid);
-
+ udev_unref(udev);
logging_close();
return rc;
}
~ianmdlvl / elogind.git / blobdiff