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Revision 1.1, Sun Jun 6 01:50:00 1999 UTC (20 years, 10 months ago) by thorpej
Branch: MAIN
CVS Tags: wrstuden-devbsize-base, wrstuden-devbsize-19991221, wrstuden-devbsize, netbsd-1-5-base, netbsd-1-5-RELEASE, netbsd-1-5-PATCH003, netbsd-1-5-PATCH002, netbsd-1-5-PATCH001, netbsd-1-5-BETA2, netbsd-1-5-BETA, netbsd-1-5-ALPHA2, netbsd-1-5, minoura-xpg4dl-base, minoura-xpg4dl, comdex-fall-1999-base, comdex-fall-1999

Add pidfile(3), which write a pid file in /var/run, and arranges for it
to be removed on normal exit.

.\"	$NetBSD: pidfile.3,v 1.1 1999/06/06 01:50:00 thorpej Exp $
.\"
.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jason R. Thorpe.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.\"    must display the following acknowledgement:
.\"        This product includes software developed by the NetBSD
.\"        Foundation, Inc. and its contributors.
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.\"    contributors may be used to endorse or promote products derived
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.Dd June 5, 1999
.Dt PIDFILE 3
.Os
.Sh NAME
.Nm pidfile
.Nd write a daemon pid file
.Sh LIBRARY
.Lb libutil
.Sh SYNOPSIS
.Fd #include <util.h>
.Ft void
.Fn pidfile "const char *basename"
.Sh DESCRIPTION
.Fn pidfile
writes a file containing the process ID of the program to the
.Pa /var/run
directory.  The file name has the form
.Pa /var/run/basename.pid .
If the
.Ar basename
argument is NULL,
.Nm
will determine the program name and use that instead.
.Pp
The pid file can be used as a quick reference if
the process needs to be sent a signal.  When the program exists,
the pid file will be removed automatically, unless the program
receives a fatal signal.
.Pp
Note that only the first invocation of
.Nm
causes a pid file to be written; subsequent invocations have no effect.
.Sh SEE ALSO
.Xr atexit 3
.Sh HISTORY
The
.Nm
function call appeared in
.Nx 1.5 .