1 /* 2 * 3 * uidswap.h 4 * 5 * Author: Tatu Ylonen <ylo@cs.hut.fi> 6 * 7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 8 * All rights reserved 9 * 10 * Created: Sat Sep 9 01:43:15 1995 ylo 11 * Last modified: Sat Sep 9 02:34:04 1995 ylo 12 * 13 */ 14 15 #ifndef UIDSWAP_H 16 #define UIDSWAP_H 17 18 /* 19 * Temporarily changes to the given uid. If the effective user id is not 20 * root, this does nothing. This call cannot be nested. 21 */ 22 void temporarily_use_uid(uid_t uid); 23 24 /* 25 * Restores the original effective user id after temporarily_use_uid(). 26 * This should only be called while temporarily_use_uid is effective. 27 */ 28 void restore_uid(); 29 30 /* 31 * Permanently sets all uids to the given uid. This cannot be called while 32 * temporarily_use_uid is effective. This must also clear any saved uids. 33 */ 34 void permanently_set_uid(uid_t uid); 35 36 #endif /* UIDSWAP_H */ 37