1.\" $NetBSD: tcsetpgrp.3,v 1.10 2003/08/07 16:44:14 agc Exp $ 2.\" 3.\" Copyright (c) 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)tcsetpgrp.3 8.1 (Berkeley) 6/4/93 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 unistd.h 42.Ft int 43.Fn tcsetpgrp "int fd" "pid_t pgrp_id" 44.Sh DESCRIPTION 45If the process has a controlling terminal, the 46.Nm tcsetpgrp 47function sets the foreground process group ID associated with the 48terminal device to 49.Fa pgrp_id . 50The terminal device associated with 51.Fa fd 52must be the controlling terminal of the calling process and the 53controlling terminal must be currently associated with the session 54of the calling process. 55The value of 56.Fa pgrp_id 57must be the same as the process group ID of a process in the same 58session as the calling process. 59.Pp 60Upon successful completion, 61.Nm tcsetpgrp 62returns a value of zero. 63.Sh ERRORS 64If an error occurs, 65.Nm tcgetpgrp 66returns -1 and the global variable 67.Va errno 68is set to indicate the error, as follows: 69.Bl -tag -width Er 70.It Bq Er EBADF 71The 72.Fa fd 73argument is not a valid file descriptor. 74.It Bq Er EINVAL 75An invalid value of 76.Fa pgrp_id 77was specified. 78.It Bq Er ENOTTY 79The calling process does not have a controlling terminal, or the file 80represented by 81.Fa fd 82is not the controlling terminal, or the controlling terminal is no 83longer associated with the session of the calling process. 84.It Bq Er EPERM 85The 86.Fa pgrp_id 87argument does not match the process group ID of a process in the same 88session as the calling process. 89.El 90.Sh SEE ALSO 91.Xr setpgid 2 , 92.Xr setsid 2 , 93.Xr tcgetpgrp 3 94.Sh STANDARDS 95The 96.Nm tcsetpgprp 97function conforms to 98.St -p1003.1-90 . 99