linux-master/kernel/sys.c

529 long __sys_setreuid(uid_t ruid, uid_t euid)
537 	kruid = make_kuid(ns, ruid);
540 	if ((ruid != (uid_t) -1) && !uid_valid(kruid))
551 	if (ruid != (uid_t) -1) {
573 	if (ruid != (uid_t) -1 ||
594 SYSCALL_DEFINE2(setreuid, uid_t, ruid, uid_t, euid)
596 	return __sys_setreuid(ruid, euid);
664  * This function implements a generic ability to update ruid, euid,
667 long __sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
676 	kruid = make_kuid(ns, ruid);
680 	if ((ruid != (uid_t) -1) && !uid_valid(kruid))
692 	if ((ruid == (uid_t) -1 || uid_eq(kruid, old->uid)) &&
698 	ruid_new = ruid != (uid_t) -1        && !uid_eq(kruid, old->uid) &&
712 	if (ruid != (uid_t) -1) {
742 SYSCALL_DEFINE3(setresuid, uid_t, ruid, uid_t, euid, uid_t, suid)
744 	return __sys_setresuid(ruid, euid, suid);
751 	uid_t ruid, euid, suid;
753 	ruid = from_kuid_munged(cred->user_ns, cred->uid);
757 	retval = put_user(ruid, ruidp);