1.\" $NetBSD: nohup.1,v 1.9 2001/12/08 19:09:57 wiz Exp $ 2.\" 3.\" Copyright (c) 1989, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Institute of Electrical and Electronics Engineers, Inc. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the University of 20.\" California, Berkeley and its contributors. 21.\" 4. Neither the name of the University nor the names of its contributors 22.\" may be used to endorse or promote products derived from this software 23.\" without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35.\" SUCH DAMAGE. 36.\" 37.\" @(#)nohup.1 8.1 (Berkeley) 6/6/93 38.\" 39.Dd June 6, 1993 40.Dt NOHUP 1 41.Os 42.Sh NAME 43.Nm nohup 44.Nd invoke a command immune to hangups 45.Sh SYNOPSIS 46.Nm 47.Ar utility 48.Op Ar arg ... 49.Sh DESCRIPTION 50The 51.Nm 52utility invokes 53.Ar command 54with 55its arguments 56and at this time sets the signal 57.Dv SIGHUP 58to be ignored. 59If the standard output is a terminal, the standard output is 60appended to the file 61.Pa nohup.out 62in the current directory. 63If standard error is a terminal, it is directed to the same place 64as the standard output. 65.Sh EXIT STATUS 66The 67.Nm 68utility exits with one of the following values: 69.Bl -tag -width Ds 70.It 126 71The 72.Ar utility 73was found but could not be invoked. 74.It 127 75The 76.Ar utility 77could not be found or an error occurred in 78.Nm "" . 79.El 80.Pp 81Otherwise, the exit status of 82.Nm 83will be that of 84.Ar utility . 85.Sh ENVIRONMENT 86The following variable is utilized by 87.Nm "" . 88.Bl -tag -width flag 89.It Ev HOME 90If the output file 91.Pa nohup.out 92cannot be created in the current directory, the 93.Nm 94utility uses the directory named by 95.Ev HOME 96to create the file. 97.El 98.Sh SEE ALSO 99.Xr signal 3 100.Sh STANDARDS 101The 102.Nm 103command is expected to be 104.St -p1003.2 105compatible. 106