1.\" $OpenBSD: timeout.1,v 1.9 2024/06/16 18:33:56 job Exp $ 2.\" $NetBSD: timeout.1,v 1.4 2016/10/13 06:22:26 dholland Exp $ 3.\" 4.\" Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org> 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.\" $FreeBSD: head/usr.bin/timeout/timeout.1 268861 2014-07-18 22:56:59Z bapt $ 29.\" 30.Dd $Mdocdate: June 16 2024 $ 31.Dt TIMEOUT 1 32.Os 33.Sh NAME 34.Nm timeout 35.Nd run a command with a time limit 36.Sh SYNOPSIS 37.Nm 38.Op Fl fp 39.Op Fl k Ar time 40.Op Fl s Ar signal 41.Ar duration 42.Ar command 43.Op Ar arg ... 44.Sh DESCRIPTION 45The 46.Nm 47utility executes 48.Ar command 49and kills it if it is still running after the 50specified 51.Ar duration . 52If 53.Ar duration 54is 0, the timeout is disabled. 55.Pp 56The options are as follows: 57.Bl -tag -width Ds 58.It Fl f , -foreground 59Do not propagate the timeout signal to children processes. 60.It Fl k Ar time , Fl -kill-after Ns = Ns Ar time 61Send a second signal, 62.Dv SIGKILL , 63if the command is still running 64.Ar time 65after the first signal was sent. 66.It Fl p , -preserve-status 67Always exit with the same status as 68.Ar command , 69even if the timeout was reached. 70.It Fl s Ar signal , Fl -signal Ns = Ns Ar signal 71A non-negative decimal number or symbolic signal name specifying 72the signal to send on timeout, instead of the default 73.Dv SIGTERM . 74.El 75.Sh DURATION FORMAT 76.Ar duration 77and 78.Ar time 79may contain a decimal fraction. 80The value defaults to seconds unless a unit suffix is given. 81.Pp 82The supported unit suffixes are: 83.Pp 84.Bl -tag -width Ds -offset indent -compact 85.It s 86seconds 87.It m 88minutes 89.It h 90hours 91.It d 92days 93.El 94.Sh EXIT STATUS 95The 96.Nm 97utility may return one of the following statuses: 98.Pp 99.Bl -tag -width indent -compact 100.It 124 101The time limit expired and the 102.Fl p 103flag was not set. 104.It 126 105The 106.Ar command 107was found but could not be executed. 108.It 127 109The 110.Ar command 111was not found. 112.El 113.Pp 114Otherwise, 115.Nm 116returns the exit status of the 117.Ar command . 118.Sh SEE ALSO 119.Xr kill 1 , 120.Xr signal 3 121.Sh STANDARDS 122The 123.Nm 124utility is compliant with the 125.St -p1003.1-2024 126specification. 127.Sh HISTORY 128The 129.Nm 130utility first appeared in GNU Coreutils 7.0 and has been available since 131.Ox 7.0 . 132