1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)setruid.3 8.1 (Berkeley) 6/2/93 29.\" 30.Dd June 2, 1993 31.Dt SETRUID 3 32.Os 33.Sh NAME 34.Nm setruid , 35.Nm setrgid 36.Nd set user and group ID 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In unistd.h 41.Ft int 42.Fn setruid "uid_t ruid" 43.Ft int 44.Fn setrgid "gid_t rgid" 45.Sh DESCRIPTION 46The 47.Fn setruid 48function 49.Pq Fn setrgid 50sets the real user ID (group ID) of the 51current process. 52.Sh RETURN VALUES 53.Rv -std 54.Sh COMPATIBILITY 55The use of these calls is not portable. 56Their use is discouraged; they will be removed in the future. 57.Sh ERRORS 58The functions fail if: 59.Bl -tag -width Er 60.It Bq Er EPERM 61The user is not the super user and the ID 62specified is not the real or effective ID. 63.El 64.Sh SEE ALSO 65.Xr getgid 2 , 66.Xr getuid 2 , 67.Xr setegid 2 , 68.Xr seteuid 2 , 69.Xr setgid 2 , 70.Xr setuid 2 71.Sh HISTORY 72The 73.Fn setruid 74and 75.Fn setrgid 76syscalls appeared in 77.Bx 4.2 78and were dropped in 79.Bx 4.4 . 80