linux-master/kernel/sys.c

563 		    !uid_eq(old->suid, keuid) &&
575 		new->suid = new->euid;
629 		new->suid = new->uid = kuid;
635 	} else if (!uid_eq(kuid, old->uid) && !uid_eq(kuid, new->suid)) {
665  * and suid.  This allows you to implement the 4.4 compatible seteuid().
667 long __sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
678 	ksuid = make_kuid(ns, suid);
686 	if ((suid != (uid_t) -1) && !uid_valid(ksuid))
695 	    (suid == (uid_t) -1 || uid_eq(ksuid, old->suid)))
699 		   !uid_eq(kruid, old->euid) && !uid_eq(kruid, old->suid);
701 		   !uid_eq(keuid, old->euid) && !uid_eq(keuid, old->suid);
702 	suid_new = suid != (uid_t) -1        && !uid_eq(ksuid, old->uid) &&
703 		   !uid_eq(ksuid, old->euid) && !uid_eq(ksuid, old->suid);
722 	if (suid != (uid_t) -1)
723 		new->suid = ksuid;
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;
755 	suid = from_kuid_munged(cred->user_ns, cred->suid);
761 			return put_user(suid, suidp);
882 	    uid_eq(kuid, old->suid) || uid_eq(kuid, old->fsuid) ||
1673 		    uid_eq(cred->uid, tcred->suid) &&