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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 UID, effective UID, and saved set-user-ID (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), setresuid(2), setreuid(2), setuid(2)