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Rewrote various parts.

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Michael Kerrisk 2007-12-27 15:19:31 +00:00
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man2/getresuid.2
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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (C) 1997 Andries Brouwer (aeb@cwi.nl)
.\" and Copyright (c) 2007, Michael Kerrisk <mtk.manpages@gmail.com>
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
@ -23,9 +24,9 @@
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified, 2003-05-26, Michael Kerrisk, <mtk.manpages@gmail.com>
.TH GETRESUID 2 2003-05-26 "Linux" "Linux Programmer's Manual"
.TH GETRESUID 2 2007-12-28 "Linux" "Linux Programmer's Manual"
.SH NAME
getresuid, getresgid \- get real, effective and saved user or group ID
getresuid, getresgid \- get real, effective and saved user/group IDs
.SH SYNOPSIS
.B #define _GNU_SOURCE
.br
@ -36,11 +37,15 @@ getresuid, getresgid \- get real, effective and saved user or group ID
.BI "int getresgid(gid_t *" rgid ", gid_t *" egid ", gid_t *" sgid );
.SH DESCRIPTION
.BR getresuid ()
returns the real UID, the effective UID, and the saved set-user-ID
of the calling process, in the arguments
.IR ruid ,
.IR euid ,
and
.IR suid ,
respectively.
.BR 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.
performs the analogous task for the process's group IDs.
.SH "RETURN VALUE"
On success, zero is returned.
On error, \-1 is returned, and
@ -51,17 +56,20 @@ is set appropriately.
.B EFAULT
One of the arguments specified an address outside the calling program's
address space.
.SH "CONFORMING TO"
These calls are non-standard;
they also appear on HP-UX and some of the BSDs.
.SH VERSIONS
These system calls appeared on Linux starting with kernel 2.1.44.
The prototype is given by glibc since version 2.3.2
The prototypes are given by glibc since version 2.3.2,
provided
.B _GNU_SOURCE
is defined.
.SH "CONFORMING TO"
These calls are non-standard;
they also appear on HP-UX and some of the BSDs.
.SH "SEE ALSO"
.BR getuid (2),
.BR setresuid (2),
.BR setreuid (2),
.BR setuid (2),
.BR credentials (7),
.BR feature_test_macros (7)