getresuid, getresgid — get real, effective and saved
user/group IDs
Synopsis
#define _GNU_SOURCE
#include <unistd.h>
int
getresuid(
uid_t *
ruid,
uid_t *
euid,
uid_t *
suid);
int
getresgid(
gid_t *
rgid,
gid_t *
egid,
gid_t *
sgid);
DESCRIPTION
getresuid() 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 VALUE
On success, zero is returned. On error, −1 is
returned, and errno is set
appropriately.
ERRORS
EFAULT
One of the arguments specified an address outside
the calling program's address space.
VERSIONS
These 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.
CONFORMING TO
These calls are non-standard; they also appear on HP-UX
and some of the BSDs.
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
Copyright (C) 1997 Andries Brouwer (aeb@cwi.nl)
and Copyright (c) 2007, Michael Kerrisk <mtk.manpages@gmail.com>
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Modified, 2003-05-26, Michael Kerrisk, <mtk.manpages@gmail.com>