NAME
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 processs 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 programs 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.
SEE ALSO
getuid(2), setresuid(2), setreuid(2), setuid(2), credentials(7), feature_test_macros(7)
COLOPHON
This page is part of release 3.23 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/.