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Code

vol_id: probe volume as user nobody

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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
Kay Sievers 2006-01-13 13:18:41 +01:00
parent d548032795
commit e3440f37f0
3 changed files with 21 additions and 5 deletions
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7
extras/volume_id/libvolume_id/mac.c
View File

@ -84,14 +84,15 @@ int volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
part_count = be32_to_cpu(part->map_count);
dbg("expecting %d partition entries", part_count);
if (part_count < 1 || part_count > 256)
return -1;
if (id->partitions != NULL)
free(id->partitions);
id->partitions =
malloc(part_count * sizeof(struct volume_id_partition));
id->partitions = malloc(part_count * sizeof(struct volume_id_partition));
if (id->partitions == NULL)
return -1;
memset(id->partitions, 0x00, sizeof(struct volume_id_partition));
memset(id->partitions, 0x00, part_count * sizeof(struct volume_id_partition));
id->partition_count = part_count;

2
extras/volume_id/libvolume_id/volume_id.h
View File

@ -14,7 +14,7 @@
#include <stdint.h>
#include <stddef.h>
#define VOLUME_ID_VERSION 55
#define VOLUME_ID_VERSION 56
#define VOLUME_ID_LABEL_SIZE 64
#define VOLUME_ID_UUID_SIZE 36

17
extras/volume_id/vol_id.c
View File

@ -27,6 +27,7 @@
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <grp.h>
#include <sys/ioctl.h>
#include "../../udev.h"
@ -110,6 +111,8 @@ int main(int argc, char *argv[])
int i;
uint64_t size;
const char *node = NULL;
uid_t nobody_uid;
gid_t nobody_gid;
int rc = 0;
logging_init("vol_id");
@ -146,12 +149,24 @@ int main(int argc, char *argv[])
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;
}
}
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;
rc = 4;
goto exit;
print: