Annotation of /trunk/fcron/run-crons

#!/bin/bash

# 06 May 2004; Aron Griffis <agriffis@gentoo.org> run-crons:
#     Make the locking actually work.  The old code was racy.
#     Thanks to Mathias Gumz in bug 45155 for some cleanups.
#
# 23 Jun 2002; Jon Nelson <jnelson@gentoo.org> run-crons:
#     fixed a race condition, where cron jobs and run-crons wanted to
#     delete touch files
#
# 20 Apr 2002; Thilo Bangert <bangert@gentoo.org> run-crons:
#     moved lastrun directory to /var/spool/cron/lastrun
#
# Author: Achim Gottinger <achim@gentoo.org>
#
# Mostly copied from SuSE
#
# 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
    if [[ $? != 0 ]]; then
        # lock failed, check for a running process.
        # handle both old- and new-style locking.
        cronpid=$(readlink ${LOCKFILE} 2>/dev/null ||
                  cat ${LOCKFILE} 2>/dev/null)
        if [[ $? == 0 ]]; then 
            if kill -0 ${cronpid} 2>/dev/null; then
                # whoa, another process is really running
                exit 0
            else
                rm -f ${LOCKFILE}
            fi
        fi
    fi
done

# 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 ${LOCKDIR} -exec /bin/rm -f {} \;
1	niro	144	#!/bin/bash
2
3			# 06 May 2004; Aron Griffis <agriffis@gentoo.org> run-crons:
4			# Make the locking actually work. The old code was racy.
5			# Thanks to Mathias Gumz in bug 45155 for some cleanups.
6			#
7			# 23 Jun 2002; Jon Nelson <jnelson@gentoo.org> run-crons:
8			# fixed a race condition, where cron jobs and run-crons wanted to
9			# delete touch files
10			#
11			# 20 Apr 2002; Thilo Bangert <bangert@gentoo.org> run-crons:
12			# moved lastrun directory to /var/spool/cron/lastrun
13			#
14			# Author: Achim Gottinger <achim@gentoo.org>
15			#
16			# Mostly copied from SuSE
17			#
18			# this script looks into /etc/cron.[hourly\|daily\|weekly\|monthly]
19			# for scripts to be executed. The info about last run is stored in
20			# /var/spool/cron/lastrun
21
22			LOCKDIR=/var/spool/cron/lastrun
23			LOCKFILE=${LOCKDIR}/lock
24
25			mkdir -p ${LOCKDIR}
26
27			# Make sure we're not running multiple instances at once.
28			# Try twice to lock, otherwise give up.
29			for ((i = 0; i < 2; i = i + 1)); do
30			ln -sn $$ ${LOCKFILE} 2>/dev/null
31			if [[ $? != 0 ]]; then
32			# lock failed, check for a running process.
33			# handle both old- and new-style locking.
34			cronpid=$(readlink ${LOCKFILE} 2>/dev/null \|\|
35			cat ${LOCKFILE} 2>/dev/null)
36			if [[ $? == 0 ]]; then
37			if kill -0 ${cronpid} 2>/dev/null; then
38			# whoa, another process is really running
39			exit 0
40			else
41			rm -f ${LOCKFILE}
42			fi
43			fi
44			fi
45			done
46
47			# Set a trap to remove the lockfile when we're finished
48			trap "rm -f ${LOCKFILE}" 0 1 2 3 15
49
50
51			for BASE in hourly daily weekly monthly
52			do
53			CRONDIR=/etc/cron.${BASE}
54
55			test -d $CRONDIR \|\| continue
56
57			if [ -e ${LOCKDIR}/cron.$BASE ]
58			then
59			case $BASE in
60			hourly)
61			#>= 1 hour, 5 min -=> +65 min
62			TIME="-cmin +65" ;;
63			daily)
64			#>= 1 day, 5 min -=> +1445 min
65			TIME="-cmin +1445" ;;
66			weekly)
67			#>= 1 week, 5 min -=> +10085 min
68			TIME="-cmin +10085" ;;
69			monthly)
70			#>= 31 days, 5 min -=> +44645 min
71			TIME="-cmin +44645" ;;
72			esac
73			find ${LOCKDIR} -name cron.$BASE $TIME -exec rm {} \;
74			fi
75
76			# if there is no touch file, make one then run the scripts
77			if [ ! -e ${LOCKDIR}/cron.$BASE ]
78			then
79			touch ${LOCKDIR}/cron.$BASE
80
81			set +e
82			for SCRIPT in $CRONDIR/*
83			do
84			if [[ -x $SCRIPT && ! -d $SCRIPT ]]; then
85			$SCRIPT
86			fi
87			done
88			fi
89			done
90
91			# Clean out bogus cron.$BASE files with future times
92			touch ${LOCKDIR}
93			find ${LOCKDIR} -newer ${LOCKDIR} -exec /bin/rm -f {} \;