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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.
        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.
        These calls are non-standard; they also appear on HP-UX and some of the
        BSDs.
 
        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)