View Source: setreuid(2) - Waikato Linux Users Group

Edit PageHistory Diff Info LikePages

SETREUID
!!!SETREUID
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
NOTES
CONFORMING TO
SEE ALSO
----
!!NAME


setreuid, setregid - set real and/or effective user or group ID
!!SYNOPSIS


__#include __
#include __


__int setreuid(uid_t__ ''ruid''__, uid_t__
''euid''__);
int setregid(gid_t__ ''rgid''__, gid_t__
''egid''__);__
!!DESCRIPTION


__setreuid__ sets real and effective user IDs of the
current process. Unprivileged users may only set the real
user ID to the real user ID or the effective user ID, and
may only set the effective user ID to the real user ID, the
effective user ID or the saved user ID.


Supplying a value of -1 for either the real or effective
user ID forces the system to leave that ID
unchanged.


If the real user ID is set or the effective user ID is set
to a value not equal to the previous real user ID, the saved
user ID will be set to the new effective user
ID.


Completely analogously, __setregid__ sets real and
effective group ID's of the current process, and all of the
above holds with
__
!!RETURN VALUE


On success, zero is returned. On error, -1 is returned, and
''errno'' is set appropriately.
!!ERRORS


__EPERM__


The current process is not the super-user and changes other
than (i) swapping the effective user (group) ID with the
real user (group) ID, or (ii) setting one to the value of
the other or (iii) setting the effective user (group) ID to
the value of the saved user (group) ID was
specified.
!!NOTES


Setting the effective user (group) ID to the saved user ID
is possible since Linux 1.1.37 (1.1.38).
!!CONFORMING TO


BSD 4.3 (the __setreuid__ and __setregid__ function
calls first appeared in 4.2BSD).
!!SEE ALSO


getuid(2), getgid(2), setuid(2),
setgid(2), seteuid(2),
setresuid(2)
----

11 pages link to setreuid(2):

This page is a man page (or other imported legacy content). We are unable to automatically determine the license status of this page.

Last edited on Tuesday, June 4, 2002 12:23:46 am by "perry"

Edit PageHistory Diff Info LikePages