mirror of
https://github.com/openbsd/src.git
synced 2024-12-22 07:27:59 -08:00
123 lines
3.5 KiB
Groff
123 lines
3.5 KiB
Groff
.\" $OpenBSD: nohup.1,v 1.16 2010/09/29 07:44:56 jmc Exp $
|
|
.\" $NetBSD: nohup.1,v 1.5 1995/08/31 23:35:24 jtc Exp $
|
|
.\"
|
|
.\" Copyright (c) 1989, 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)nohup.1 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd $Mdocdate: September 29 2010 $
|
|
.Dt NOHUP 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nohup
|
|
.Nd invoke a command immune to hangups
|
|
.Sh SYNOPSIS
|
|
.Nm nohup
|
|
.Ar utility
|
|
.Op Ar arg ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
command allows the specified utility to be protected from termination
|
|
if the user should become logged out
|
|
(for example, due to a modem line or TCP/IP connection being dropped).
|
|
To do this,
|
|
.Nm
|
|
sets the
|
|
.Dv SIGHUP
|
|
.Xr signal 3
|
|
.Pq Dq terminal line hangup
|
|
to be ignored,
|
|
then executes
|
|
.Ar utility
|
|
along with any arguments.
|
|
.Pp
|
|
If the standard output is a terminal, the standard output is
|
|
appended to the file
|
|
.Pa nohup.out
|
|
in the current directory.
|
|
If standard error is a terminal, it is directed to the same place
|
|
as the standard output.
|
|
.Pp
|
|
If the output file
|
|
.Pa nohup.out
|
|
cannot be created in the current directory,
|
|
.Nm
|
|
attempts to create the file in the user's home directory.
|
|
If the file
|
|
.Pa nohup.out
|
|
cannot be created,
|
|
either in the current directory or the user's home directory,
|
|
.Nm
|
|
will exit without invoking
|
|
.Ar utility ,
|
|
with an exit value as described below.
|
|
.Sh ENVIRONMENT
|
|
.Bl -tag -width Ds
|
|
.It Ev HOME
|
|
User's home directory.
|
|
.El
|
|
.Sh EXIT STATUS
|
|
The
|
|
.Nm
|
|
utility exits with one of the following values:
|
|
.Pp
|
|
.Bl -tag -width Ds -offset indent -compact
|
|
.It 126
|
|
The
|
|
.Ar utility
|
|
was found but could not be invoked.
|
|
.It 127
|
|
The
|
|
.Ar utility
|
|
could not be found or an error occurred in
|
|
.Nm .
|
|
.El
|
|
.Pp
|
|
Otherwise, the exit status of
|
|
.Nm
|
|
shall be that of
|
|
.Ar utility .
|
|
.Sh SEE ALSO
|
|
.Xr csh 1 ,
|
|
.Xr signal 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm
|
|
utility is compliant with the
|
|
.St -p1003.1-2008
|
|
specification.
|
|
.Pp
|
|
.Nm
|
|
also exists as a built-in to
|
|
.Xr csh 1 ,
|
|
though with a different syntax.
|