getresgid(2) -- Linux man page

 

NAME

getresuid, getresgid - get real, effective and saved user or group ID  

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 and getresgid (both introduced in Linux 2.1.44) get the real, effective and saved user ID's (resp. group ID's) of the current process.

 

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.
 

CONFORMING TO

This call is Linux-specific. The prototype is given by glibc since version 2.3.2 provided _GNU_SOURCE is defined.  

SEE ALSO

getuid(2), setuid(2), setreuid(2), setresuid(2)