.\" Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
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.\" $FreeBSD$
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.Dd February 17, 2017
.Dt TIMEOUT 1
.Os
.Sh NAME
.Nm timeout
.Nd run a command with a time limit
.Sh SYNOPSIS
.Nm
.Op Fl -signal Ar sig | Fl s Ar sig
.Op Fl -preserve-status
.Op Fl -kill-after Ar time | Fl k Ar time
.Op Fl -foreground
.Ao Ar duration Ac
.Ao Ar command Ac
.Ao Ar args ... Ac
.Sh DESCRIPTION
.Nm
starts the
.Ar command
with its
.Ar args.
If
.Ar command
is still running after
.Ar duration ,
it is killed.
By default,
.Ar SIGTERM.
is sent.
.Bl -tag -width "-k time, --kill-after time"
.It Fl -preserve-status
Always exits with the same status as
.Ar command
even if it times out.
.It Fl -foreground
Do not propagate timeout to the
.Ar command
children.
.It Fl s Ar sig , Fl -signal Ar sig
Specify the signal to send on timeout.
By default,
.Ar SIGTERM .
is sent.
.It Fl k Ar time , Fl -kill-after Ar time
Send a second kill signal if
.Ar command
is still running after
.Ar time
after the first signal was sent.
.El
.Sh DURATION FORMAT
.Ar duration
and
.Ar time
can be integer or decimal numbers.
Values without unit symbols are interpreted as seconds.
.Pp
Supported unit symbols are:
.Bl -tag -width indent -compact
.It s
seconds
.It m
minutes
.It h
hours
.It d
days
.El
.Sh EXIT STATUS
If the timeout was not reached, the exit status of
.Ar command
is returned.
.Pp
If the timeout was reached and
.Fl -preserve-status
is set, the exit status of
.Ar command
is returned.
If
.Fl -preserve-status
is not set, an exit status of 124 is returned.
.Pp
If
.Ar command
exits after receiving a signal, the exit status returned is the signal number
plus 128.
.Pp
If
.Ar command
is an invalid command, the exit status returned is 126.
.Pp
If
.Ar command
is a non existing command, the exit status returned is 127.
.Pp
If an invalid parameter is passed to
.Fl s
or
.Fl k ,
the exit status return is 125.
.Sh SEE ALSO
.Xr kill 1 ,
.Xr signal 3
.Sh HISTORY
The
.Nm
command first appeared in
.Fx 10.3 .
.Sh AUTHORS
.An Baptiste Daroussin Aq Mt bapt@FreeBSD.org
and
.An Vsevolod Stakhov Aq Mt vsevolod@FreeBSD.org