Copyright (C) 1997 Andries Brouwer (firstname.lastname@example.org) and Copyright (c) 2007, Michael Kerrisk <email@example.com> %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the...
NAMEgetresuid, getresgid - get real, effective and saved user/group IDs
SYNOPSIS#define _GNU_SOURCE /* See feature_test_macros(7) */
int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
DESCRIPTIONgetresuid() returns the real UID, the effective UID, and the saved set-user-ID of the calling process, in the arguments ruid, euid, and suid, respectively. getresgid() performs the analogous task for the process's group IDs.
RETURN VALUEOn success, zero is returned. On error, -1 is returned, and errno is set appropriately.
- One of the arguments specified an address outside the calling program's address space.
VERSIONSThese system calls appeared on Linux starting with kernel 2.1.44.
The prototypes are given by glibc since version 2.3.2, provided _GNU_SOURCE is defined.