mirror of
https://github.com/systemd/systemd.git
synced 2024-10-30 14:55:37 +03:00
accff72685
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
198 lines
4.1 KiB
C
198 lines
4.1 KiB
C
/*
|
|
* vol_id - udev callout to read filesystem label and uuid
|
|
*
|
|
* Copyright (C) 2005 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "../../udev_utils.h"
|
|
#include "../../logging.h"
|
|
#include "libvolume_id/volume_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;
|
|
|
|
value = getenv("UDEV_LOG");
|
|
if (value)
|
|
udev_log = log_priority(value);
|
|
else
|
|
udev_log = LOG_ERR;
|
|
}
|
|
|
|
if (priority > udev_log)
|
|
return;
|
|
|
|
va_start(args, format);
|
|
vsyslog(priority, format, args);
|
|
va_end(args);
|
|
}
|
|
#endif
|
|
|
|
static void set_str(char *to, const char *from, size_t count)
|
|
{
|
|
size_t i, j, len;
|
|
|
|
/* strip trailing whitespace */
|
|
len = strnlen(from, count);
|
|
while (len && isspace(from[len-1]))
|
|
len--;
|
|
|
|
/* strip leading whitespace */
|
|
i = 0;
|
|
while (isspace(from[i]) && (i < len))
|
|
i++;
|
|
|
|
j = 0;
|
|
while (i < len) {
|
|
/* substitute multiple whitespace */
|
|
if (isspace(from[i])) {
|
|
while (isspace(from[i]))
|
|
i++;
|
|
to[j++] = '_';
|
|
}
|
|
/* skip chars */
|
|
if (from[i] == '/') {
|
|
i++;
|
|
continue;
|
|
}
|
|
to[j++] = from[i++];
|
|
}
|
|
to[j] = '\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";
|
|
enum print_type {
|
|
PRINT_EXPORT,
|
|
PRINT_TYPE,
|
|
PRINT_LABEL,
|
|
PRINT_UUID,
|
|
} print = PRINT_EXPORT;
|
|
struct volume_id *vid = NULL;
|
|
static char name[VOLUME_ID_LABEL_SIZE];
|
|
int i;
|
|
uint64_t size;
|
|
const char *node = NULL;
|
|
int rc = 0;
|
|
|
|
logging_init("vol_id");
|
|
|
|
for (i = 1 ; i < argc; i++) {
|
|
char *arg = argv[i];
|
|
|
|
if (strcmp(arg, "--export") == 0) {
|
|
print = PRINT_EXPORT;
|
|
} else if (strcmp(arg, "-t") == 0) {
|
|
print = PRINT_TYPE;
|
|
} else if (strcmp(arg, "-l") == 0) {
|
|
print = PRINT_LABEL;
|
|
} else if (strcmp(arg, "-u") == 0) {
|
|
print = PRINT_UUID;
|
|
} else
|
|
node = arg;
|
|
}
|
|
if (!node) {
|
|
err("no node specified");
|
|
fprintf(stderr, help);
|
|
rc = 1;
|
|
goto exit;
|
|
}
|
|
|
|
vid = volume_id_open_node(node);
|
|
if (vid == NULL) {
|
|
fprintf(stderr, "%s: error open volume\n", node);
|
|
rc = 2;
|
|
goto exit;
|
|
}
|
|
|
|
if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0)
|
|
size = 0;
|
|
dbg("BLKGETSIZE64=%llu", size);
|
|
|
|
if (volume_id_probe_all(vid, 0, size) == 0)
|
|
goto print;
|
|
|
|
if (print != PRINT_EXPORT)
|
|
fprintf(stderr, "%s: unknown volume type\n", node);
|
|
rc = 3;
|
|
goto exit;
|
|
|
|
print:
|
|
set_str(name, vid->label, sizeof(vid->label));
|
|
replace_untrusted_chars(name);
|
|
|
|
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);
|
|
break;
|
|
case PRINT_TYPE:
|
|
printf("%s\n", vid->type);
|
|
break;
|
|
case PRINT_LABEL:
|
|
if (name[0] == '\0' ||
|
|
(vid->usage_id != VOLUME_ID_FILESYSTEM && vid->usage_id != VOLUME_ID_DISKLABEL)) {
|
|
rc = 3;
|
|
goto exit;
|
|
}
|
|
printf("%s\n", name);
|
|
break;
|
|
case PRINT_UUID:
|
|
if (vid->uuid[0] == '\0' || vid->usage_id != VOLUME_ID_FILESYSTEM) {
|
|
rc = 4;
|
|
goto exit;
|
|
}
|
|
printf("%s\n", vid->uuid);
|
|
break;
|
|
}
|
|
|
|
exit:
|
|
if (vid != NULL)
|
|
volume_id_close(vid);
|
|
|
|
logging_close();
|
|
return rc;
|
|
}
|