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vol_id: use primary group of 'nobody' instead of 'nogroup'

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This fixes a Fedora issue not having the group 'nogroup'.
This commit is contained in:
Kay Sievers 2006-08-20 18:24:34 +02:00
parent 708cb35941
commit 5c51e31e0e
1 changed files with 10 additions and 8 deletions
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18
extras/volume_id/vol_id.c
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@ -27,6 +27,8 @@
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <sys/ioctl.h>
@ -131,8 +133,7 @@ int main(int argc, char *argv[])
int skip_raid = 0;
int probe_all = 0;
const char *node = NULL;
uid_t nobody_uid;
gid_t nobody_gid;
struct passwd *pw;
int retval;
int rc = 0;
@ -180,13 +181,14 @@ 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) {
/* try to drop all privileges before reading disk content */
pw = getpwnam ("nobody");
if (pw != NULL && pw->pw_uid > 0 && pw->pw_gid > 0) {
dbg("dropping privileges to %u:%u", (unsigned int)pw->pw_uid, (unsigned int)pw->pw_gid);
if (setgroups(0, NULL) != 0 ||
setgid(nobody_gid) != 0 ||
setuid(nobody_uid) != 0) {
setgid(pw->pw_gid) != 0 ||
setuid(pw->pw_uid) != 0) {
fprintf(stderr, "error dropping privileges: %s\n", strerror(errno));
rc = 3;
goto exit;
}