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), feature_test_macros(7)


Copyright (C) 1997 Andries Brouwer (aebcwi.nl)

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Modified, 2003-05-26, Michael Kerrisk, <mtk.manpagesgmail.com>