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|
#!/bin/sh -e
# $Id: init,v 1.4 1999/09/05 20:48:02 roderick Exp $
script=`basename "$0"`
daemon=/usr/sbin/mon
cfg=/etc/mon/mon.cf
pid=/var/run/mon/mon.pid
desc='monitor daemon'
name=mon
user=daemon
group=shadow
# Add system dirs for start-stop-daemon.
PATH=$PATH:/sbin:/usr/sbin
[ -f $daemon -a -f $cfg ] || exit 0
# Don't bother if the user hasn't configured the package, there is no
# default configuration but there is a default config file (which just
# contains comments).
egrep -v '^[ ]*$|^#' $cfg >/dev/null || exit 0
warn() {
echo "$script:" "$@" >&2
}
die() {
warn "$@"
exit 1
}
usage() {
[ $# = 0 ] || warn "$@"
warn "usage: \`$script <action>'"
warn "valid actions: start stop restart reload force-reload"
exit 1
}
# I originally used su to start the daemon as user daemon, but ran into
# trouble with the differing requirements of su and secure-su. The GNU
# getopt's troublsome behavior of looking for switches anywhere on the
# command line requires that one use -- if one wants to pass switches
# to the shell, but secure-su doesn't allow the --. One could set
# POSIXLY_CORRECT to prevent this poor getopt_long() behavior, but then
# the sub-command would have that in its environment. In disgust I
# gave up and switched to using Perl.
daemon_run() {
perl -we '
$user = shift;
$group = shift;
defined($uid = getpwnam $user)
or die "Cannot find uid for user $user\n";
defined($gid = getgrnam $group)
or die "Cannot find gid for group $group\n";
$( = $gid;
$) = "$gid $gid";
if ($( ne "$gid $gid" || $) ne "$gid $gid") {
die "Error setting group ids, real/effective is now $(/$)\n";
}
$< = $uid;
$> = $uid;
if ($> != $uid || $< != $uid) {
die "Error setting user ids, real/effective is now $</$>\n";
}
exec @ARGV or die "Error running $ARGV[0]: $!\n";
' "$user" "$group" "$@" ||
die "return $? setting ids and running:" "$@"
}
[ $# = 1 ] || usage "wrong number of args (got $# expected 1), args are:" "$@"
action=$1
set -- --pidfile $pid --startas $daemon -- -f
case x-$action in
x-start)
echo -n "Starting $desc: $name"
daemon_run start-stop-daemon --start "$@"
echo .
;;
x-stop)
echo -n "Stopping $desc: $name"
start-stop-daemon --stop --oknodo --quiet "$@"
echo .
;;
x-restart)
echo -n "Restarting $desc: $name"
start-stop-daemon --stop --oknodo --quiet "$@"
daemon_run start-stop-daemon --start "$@"
echo .
;;
x-reload | x-force-reload)
echo "Reloading $desc configuration files."
start-stop-daemon --stop --signal 1 "$@"
;;
*)
usage "invalid action \`$action'"
;;
esac
exit 0
|
