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.Dd June 2, 1993 29.Dt SETRUID 3 30.Os 31.Sh NAME 32.Nm setruid , 33.Nm setrgid 34.Nd set user and group ID 35.Sh LIBRARY 36.Lb libc 37.Sh SYNOPSIS 38.In unistd.h 39.Ft int 40.Fn setruid "uid_t ruid" 41.Ft int 42.Fn setrgid "gid_t rgid" 43.Sh DESCRIPTION 44The 45.Fn setruid 46function 47.Pq Fn setrgid 48sets the real user ID (group ID) of the 49current process. 50.Sh RETURN VALUES 51.Rv -std 52.Sh COMPATIBILITY 53The use of these calls is not portable. 54Their use is discouraged; they will be removed in the future. 55.Sh ERRORS 56The functions fail if: 57.Bl -tag -width Er 58.It Bq Er EPERM 59The user is not the super user and the ID 60specified is not the real or effective ID. 61.El 62.Sh SEE ALSO 63.Xr getgid 2 , 64.Xr getuid 2 , 65.Xr setegid 2 , 66.Xr seteuid 2 , 67.Xr setgid 2 , 68.Xr setuid 2 69.Sh HISTORY 70The 71.Fn setruid 72and 73.Fn setrgid 74syscalls appeared in 75.Bx 4.2 76and were dropped in 77.Bx 4.4 . 78