NOTE: click here if you get an empty page.

GETRESUID(2)		   Linux Programmer's Manual		  GETRESUID(2)

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
       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.

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

Linux 2.4			  2003-05-26			  GETRESUID(2)