#include <sys/time.h>
#include <linux/rtc.h>
#include <glob.h>
+#include <grp.h>
#include "macro.h"
#include "util.h"
int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
struct passwd *p;
- unsigned long lu;
+ uid_t u;
assert(username);
assert(*username);
- assert(uid);
- assert(gid);
- assert(home);
/* We enforce some special rules for uid=0: in order to avoid
* NSS lookups for root we hardcode its data. */
if (streq(*username, "root") || streq(*username, "0")) {
*username = "root";
- *uid = 0;
- *gid = 0;
- *home = "/root";
+
+ if (uid)
+ *uid = 0;
+
+ if (gid)
+ *gid = 0;
+
+ if (home)
+ *home = "/root";
return 0;
}
- if (safe_atolu(*username, &lu) >= 0) {
+ if (parse_uid(*username, &u) >= 0) {
errno = 0;
- p = getpwuid((uid_t) lu);
+ p = getpwuid(u);
/* If there are multiple users with the same id, make
* sure to leave $USER to the configured value instead
if (!p)
return errno != 0 ? -errno : -ESRCH;
- *uid = p->pw_uid;
- *gid = p->pw_gid;
- *home = p->pw_dir;
+ if (uid)
+ *uid = p->pw_uid;
+
+ if (gid)
+ *gid = p->pw_gid;
+
+ if (home)
+ *home = p->pw_dir;
+
+ return 0;
+}
+
+int get_group_creds(const char **groupname, gid_t *gid) {
+ struct group *g;
+ gid_t id;
+
+ assert(groupname);
+
+ /* We enforce some special rules for gid=0: in order to avoid
+ * NSS lookups for root we hardcode its data. */
+
+ if (streq(*groupname, "root") || streq(*groupname, "0")) {
+ *groupname = "root";
+
+ if (gid)
+ *gid = 0;
+
+ return 0;
+ }
+
+ if (parse_gid(*groupname, &id) >= 0) {
+ errno = 0;
+ g = getgrgid(id);
+
+ if (g)
+ *groupname = g->gr_name;
+ } else {
+ errno = 0;
+ g = getgrnam(*groupname);
+ }
+
+ if (!g)
+ return errno != 0 ? -errno : -ESRCH;
+
+ if (gid)
+ *gid = g->gr_gid;
+
return 0;
}