1.\" Copyright (c) 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.\" @(#)tcsetpgrp.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD: src/lib/libc/gen/tcsetpgrp.3,v 1.6.2.3 2001/12/14 18:33:51 ru Exp $ 30.\" $DragonFly: src/lib/libc/gen/tcsetpgrp.3,v 1.2 2003/06/17 04:26:42 dillon Exp $ 31.\" 32.Dd June 4, 1993 33.Dt TCSETPGRP 3 34.Os 35.Sh NAME 36.Nm tcsetpgrp 37.Nd set foreground process group ID 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/types.h 42.In unistd.h 43.Ft int 44.Fn tcsetpgrp "int fd" "pid_t pgrp_id" 45.Sh DESCRIPTION 46If the process has a controlling terminal, the 47.Fn tcsetpgrp 48function sets the foreground process group ID associated with the 49terminal device to 50.Fa pgrp_id . 51The terminal device associated with 52.Fa fd 53must be the controlling terminal of the calling process and the 54controlling terminal must be currently associated with the session 55of the calling process. 56The value of 57.Fa pgrp_id 58must be the same as the process group ID of a process in the same 59session as the calling process. 60.Sh RETURN VALUES 61.Rv -std tcsetpgrp 62.Sh ERRORS 63The 64.Fn tcsetpgrp 65function will fail if: 66.Bl -tag -width Er 67.It Bq Er EBADF 68The 69.Fa fd 70argument is not a valid file descriptor. 71.It Bq Er EINVAL 72An invalid value of 73.Fa pgrp_id 74was specified. 75.It Bq Er ENOTTY 76The calling process does not have a controlling terminal, or the file 77represented by 78.Fa fd 79is not the controlling terminal, or the controlling terminal is no 80longer associated with the session of the calling process. 81.It Bq Er EPERM 82The 83.Fa pgrp_id 84argument does not match the process group ID of a process in the same 85session as the calling process. 86.El 87.Sh SEE ALSO 88.Xr setpgid 2 , 89.Xr setsid 2 , 90.Xr tcgetpgrp 3 91.Sh STANDARDS 92The 93.Fn tcsetpgrp 94function is expected to be compliant with the 95.St -p1003.1-88 96specification. 97