SulinRepository/system/base/vixie-cron/files/run-crons-0.3.1

#!/bin/bash
#
# Mostly copied from SuSE and Gentoo
#
# this script looks into /etc/cron.[hourly|daily|weekly|monthly]
# for scripts to be executed. The info about last run is stored in
# /var/spool/cron/lastrun

LOCKDIR=/var/spool/cron/lastrun
LOCKFILE=${LOCKDIR}/lock

mkdir -p ${LOCKDIR}

# Make sure we're not running multiple instances at once.
# Try twice to lock, otherwise give up.
for ((i = 0; i < 2; i = i + 1)); do
    ln -sn $$ ${LOCKFILE} 2>/dev/null && break

	# lock failed, check for a running process.
	# handle both old- and new-style locking.
	cronpid=$(readlink ${LOCKFILE} 2>/dev/null) ||
	cronpid=$(cat ${LOCKFILE} 2>/dev/null) ||
	continue	# lockfile disappeared? try again

	# better than kill -0 because we can verify that it's really
	# another run-crons process
	if [[ $(</proc/${cronpid}/cmdline) == $(</proc/$$/cmdline) ]] 2>/dev/null; then
		# whoa, another process is really running
		exit 0
	else
		rm -f ${LOCKFILE}
	fi
done

# Check to make sure locking was successful
if [[ ! -L ${LOCKFILE} ]]; then
	echo "Can't create or read existing ${LOCKFILE}, giving up"
	exit 1
fi

# Set a trap to remove the lockfile when we're finished
trap "rm -f ${LOCKFILE}" 0 1 2 3 15


for BASE in hourly daily weekly monthly
do
    CRONDIR=/etc/cron.${BASE}

    test -d $CRONDIR || continue

    if [ -e ${LOCKDIR}/cron.$BASE ]
    then
	case $BASE in
	    hourly)
		#>= 1 hour, 5 min -=> +65 min
		TIME="-cmin +65" ;;
	    daily)
		#>= 1 day, 5 min -=> +1445 min
		TIME="-cmin +1445"  ;;
	    weekly)
		#>= 1 week, 5 min -=> +10085 min
		TIME="-cmin +10085"  ;;
	    monthly)
		#>= 31 days, 5 min -=> +44645 min
		TIME="-cmin +44645" ;;
	esac
        find ${LOCKDIR} -name cron.$BASE $TIME -exec rm {} \;
    fi

    # if there is no touch file, make one then run the scripts
    if [ ! -e ${LOCKDIR}/cron.$BASE ]
    then
        touch ${LOCKDIR}/cron.$BASE

        set +e
        for SCRIPT in $CRONDIR/*
        do
            if [[ -x $SCRIPT && ! -d $SCRIPT ]]; then
                $SCRIPT
            fi
        done
    fi
done

# Clean out bogus cron.$BASE files with future times
touch ${LOCKDIR}
find ${LOCKDIR} -newer ${LOCKDIR} -exec /bin/rm -f {} \;