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dpavlin |
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#!/usr/bin/perl -w |
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# daemon-ctl 1.1, 2001/02/17 (dws) |
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use strict; |
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my $action = shift @ARGV; |
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my $name = shift @ARGV; |
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my @args = @ARGV; |
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my $PIDDIR='/var/run'; |
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my $PIDFILE="$PIDDIR/$name.pid"; |
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-d "$PIDDIR" || mkdir("$PIDDIR",755) || die "$0: can't mkdir $PIDDIR\n"; |
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my $usage=1; |
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if($action eq 'stop' || $action eq 'restart') { |
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print "stopping $name..."; |
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if(open(PID, "<$PIDFILE")) { |
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my $pid=<PID>; |
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chomp $pid; |
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close(PID); |
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kill("TERM", $pid); |
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unlink "$PIDFILE" or warn "$0: can't remove $PIDFILE\n"; |
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print " ok.\n"; |
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} |
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else { |
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print " no pid.\n"; |
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}; |
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$usage=0; |
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} |
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if($action eq 'start' || $action eq 'restart') { |
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print "starting $name..."; |
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if(! -x $args[0]) { |
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print " $args[0] not found.\n"; |
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} |
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else { |
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my $pid=fork; |
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if($pid) { |
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open(PID, ">$PIDFILE") or die "$0: can't write to $PIDFILE\n"; |
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print PID "$pid\n"; |
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close(PID); |
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print " ok.\n"; |
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} |
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else { |
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exec(@args) or die "$0: can't exec @args\n"; |
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} |
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} |
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$usage=0; |
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} |
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if($action eq 'getpid') { |
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open(PID, "<$PIDFILE") or do { |
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print "$0: can't open $PIDFILE\n"; |
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exit 1; |
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}; |
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my $pid=<PID>; |
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print "$pid"; |
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$usage=0; |
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} |
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if($usage) { |
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print "usage: $0 {start|restart|stop|getpid}\n"; |
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} |
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exit 0; |
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__END__ |
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=head1 NAME |
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daemon-ctl - start/stop a program in the background |
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=head1 SYNOPSIS |
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daemon-ctl I<action> I<name> I<program> [I<args ...>] |
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=head1 DESCRIPTION |
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This program is a init-script helper. It starts/stops a program in the |
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background by using a file (in F</var/run>) to store the PID of the started |
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program. |
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I<action> can be one of: |
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=over 10 |
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=item start |
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Start the program I<program> with it's arguments I<args> and store it's pid in |
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F</var/run/name.pid>. |
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=item stop |
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Stop the program by sending a TERM signal to the process written in |
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F</var/run/name.pid>. |
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=item restart |
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Do a stop and immediately a start. |
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=item getpid |
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Print the PID of the program. |
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=head1 EXAMPLE |
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#!/bin/sh -e |
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DAEMONCTL=/usr/drwho/vault/isgptp/bin/daemon-ctl |
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GEDAFED=/usr/drwho/vault/isgptp/bin/gedafed |
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test -f $DAEMONCTL || exit 0 |
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$DAEMONCTL $1 gedafed $GEDAFED |
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=head1 AUTHOR |
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David Schweikert <dws@ee.ethz.ch> |
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