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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)tcsetpgrp.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD$ 34.\" 35.Dd June 4, 1993 36.Dt TCSETPGRP 3 37.Os 38.Sh NAME 39.Nm tcsetpgrp 40.Nd set foreground process group ID 41.Sh SYNOPSIS 42.Fd #include <sys/types.h> 43.Fd #include <unistd.h> 44.Ft int 45.Fn tcsetpgrp "int fd" "pid_t pgrp_id" 46.Sh DESCRIPTION 47If the process has a controlling terminal, the 48.Nm tcsetpgrp 49function sets the foreground process group ID associated with the 50terminal device to 51.Fa pgrp_id . 52The terminal device associated with 53.Fa fd 54must be the controlling terminal of the calling process and the 55controlling terminal must be currently associated with the session 56of the calling process. 57The value of 58.Fa pgrp_id 59must be the same as the process group ID of a process in the same 60session as the calling process. 61.Pp 62Upon successful completion, 63.Nm tcsetpgrp 64returns a value of zero. 65.Sh ERRORS 66If an error occurs, 67.Nm tcsetpgrp 68returns -1 and the global variable 69.Va errno 70is set to indicate the error, as follows: 71.Bl -tag -width Er 72.It Bq Er EBADF 73The 74.Fa fd 75argument is not a valid file descriptor. 76.It Bq Er EINVAL 77An invalid value of 78.Fa pgrp_id 79was specified. 80.It Bq Er ENOTTY 81The calling process does not have a controlling terminal, or the file 82represented by 83.Fa fd 84is not the controlling terminal, or the controlling terminal is no 85longer associated with the session of the calling process. 86.It Bq Er EPERM 87The 88.Fa pgrp_id 89argument does not match the process group ID of a process in the same 90session as the calling process. 91.El 92.Sh SEE ALSO 93.Xr setpgid 2 , 94.Xr setsid 2 , 95.Xr tcgetpgrp 3 96.Sh STANDARDS 97The 98.Nm tcsetpgprp 99function is expected to be compliant with the 100.St -p1003.1-88 101specification. 102