Provided by: manpages-dev_2.62-1_all
getresuid, getresgid - get real, effective and saved user or group ID
int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
getresuid() and getresgid() (both introduced in Linux 2.1.44) get the
real UID, effective UID, and saved set-user-ID (resp. group ID’s) of
the current process.
On success, zero is returned. On error, -1 is returned, and errno is
EFAULT One of the arguments specified an address outside the calling
program’s address space.
These calls are non-standard; they also appear on HP-UX and some of the
The prototype is given by glibc since version 2.3.2 provided
_GNU_SOURCE is defined.
getuid(2), setresuid(2), setreuid(2), setuid(2), feature_test_macros(7)