1.\" Copyright (c) 1980, 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 March 15, 2012 29.Dt KILLPG 2 30.Os 31.Sh NAME 32.Nm killpg 33.Nd send signal to a process group 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In sys/types.h 38.In signal.h 39.Ft int 40.Fn killpg "pid_t pgrp" "int sig" 41.Sh DESCRIPTION 42The 43.Fn killpg 44function 45sends the signal 46.Fa sig 47to the process group 48.Fa pgrp . 49See 50.Xr sigaction 2 51for a list of signals. 52If 53.Fa pgrp 54is 0, 55.Fn killpg 56sends the signal to the sending process's process group. 57.Pp 58The sending process must be able to 59.Fn kill 60at least one process in the receiving process group. 61.Sh RETURN VALUES 62.Rv -std killpg 63.Sh ERRORS 64The 65.Fn killpg 66function 67will fail and no signal will be sent if: 68.Bl -tag -width Er 69.It Bq Er EINVAL 70The 71.Fa sig 72argument 73is not a valid signal number. 74.It Bq Er ESRCH 75No process can be found in the process group specified by 76.Fa pgrp . 77.It Bq Er EPERM 78.Fn kill 79returns EPERM for all processes in the process group. 80.El 81.Sh SEE ALSO 82.Xr getpgrp 2 , 83.Xr kill 2 , 84.Xr sigaction 2 85.Sh HISTORY 86The 87.Fn killpg 88function appeared in 89.Bx 4.0 . 90