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 LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.Fd #include <sys/types.h> 45.Fd #include <unistd.h> 46.Ft int 47.Fn tcsetpgrp "int fd" "pid_t pgrp_id" 48.Sh DESCRIPTION 49If the process has a controlling terminal, the 50.Nm tcsetpgrp 51function sets the foreground process group ID associated with the 52terminal device to 53.Fa pgrp_id . 54The terminal device associated with 55.Fa fd 56must be the controlling terminal of the calling process and the 57controlling terminal must be currently associated with the session 58of the calling process. 59The value of 60.Fa pgrp_id 61must be the same as the process group ID of a process in the same 62session as the calling process. 63.Pp 64Upon successful completion, 65.Nm tcsetpgrp 66returns a value of zero. 67.Sh ERRORS 68If an error occurs, 69.Nm tcsetpgrp 70returns -1 and the global variable 71.Va errno 72is set to indicate the error, as follows: 73.Bl -tag -width Er 74.It Bq Er EBADF 75The 76.Fa fd 77argument is not a valid file descriptor. 78.It Bq Er EINVAL 79An invalid value of 80.Fa pgrp_id 81was specified. 82.It Bq Er ENOTTY 83The calling process does not have a controlling terminal, or the file 84represented by 85.Fa fd 86is not the controlling terminal, or the controlling terminal is no 87longer associated with the session of the calling process. 88.It Bq Er EPERM 89The 90.Fa pgrp_id 91argument does not match the process group ID of a process in the same 92session as the calling process. 93.El 94.Sh SEE ALSO 95.Xr setpgid 2 , 96.Xr setsid 2 , 97.Xr tcgetpgrp 3 98.Sh STANDARDS 99The 100.Nm tcsetpgprp 101function is expected to be compliant with the 102.St -p1003.1-88 103specification. 104