shell_cmds-34.tar.gz

[apple/shell_cmds.git] / nohup / nohup.1

.\"	$NetBSD: nohup.1,v 1.6 1997/10/19 10:23:25 lukem Exp $
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.\"	@(#)nohup.1	8.1 (Berkeley) 6/6/93
.\"
.Dd June 6, 1993
.Dt NOHUP 1
.Os
.Sh NAME
.Nm nohup
.Nd invoke a command immune to hangups
.Sh SYNOPSIS
.Nm
.Ar utility
.Op Ar arg ...
.Sh DESCRIPTION
The
.Nm
utility invokes
.Ar command
with
its arguments
and at this time sets the signal
.Dv SIGHUP
to be ignored. 
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.
.Sh ENVIRONMENT
The following variable is utilized by
.Nm "" .
.Bl -tag -width flag
.It Ev HOME
If the output file
.Pa nohup.out
cannot be created in the current directory, the
.Nm
utility uses the directory named by
.Ev HOME
to create the file.
.El
.Sh DIAGNOSTICS
The
.Nm
utility shall exit with one of the following values:
.Bl -tag -width Ds 
.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 signal 3
.Sh STANDARDS
The
.Nm
command is expected to be
.St -p1003.2
compatible.