On 01/12/2018 04:09 AM, Brian J. Murrell wrote: > I frequently get the following situation on my shorewall-lite machine, > typically right after boot, where "shorewall-lite restart" has been run > many times, overlapping even, I am sure as interfaces are brought up, > etc.: > > # ps -ef | grep shorewall > root 1094 1 0 Jan11 ? 00:00:01 lock > /etc/shorewall-lite/state/lock > root 2507 1 0 Jan11 ? 00:00:01 lock > /etc/shorewall-lite/state/lock > root 3124 1 0 Jan11 ? 00:00:00 lock > /etc/shorewall-lite/state/lock > root 7608 6935 0 06:29 pts/1 00:00:00 grep shorewall > root 11770 1 0 Jan11 ? 00:00:00 lock > /etc/shorewall-lite/state/lock > > # ls -l /etc/shorewall-lite/state/lock > ls: /etc/shorewall-lite/state/lock: No such file or directory > # ls -l /proc/{1094,2507,3124,11770}/fd/ > /proc/1094/fd/: > lr-x------ 1 root root 64 Jan 12 06:26 0 -> /dev/null > l-wx------ 1 root root 64 Jan 12 06:26 1 -> pipe:[1896] > l-wx------ 1 root root 64 Jan 12 06:26 12 -> pipe:[1896] > l-wx------ 1 root root 64 Jan 12 06:26 2 -> pipe:[1896] > lrwx------ 1 root root 64 Jan 12 06:26 3 -> > /etc/shorewall-lite/state/lock (deleted) > > /proc/11770/fd/: > lrwx------ 1 root root 64 Jan 12 06:30 0 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 1 -> /dev/null > l-wx------ 1 root root 64 Jan 12 06:30 13 -> pipe:[1718] > lrwx------ 1 root root 64 Jan 12 06:30 2 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 3 -> > /etc/shorewall-lite/state/lock (deleted) > > /proc/2507/fd/: > lrwx------ 1 root root 64 Jan 12 06:30 0 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 1 -> /dev/null > l-wx------ 1 root root 64 Jan 12 06:30 13 -> pipe:[1718] > lrwx------ 1 root root 64 Jan 12 06:30 2 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 3 -> > /etc/shorewall-lite/state/lock (deleted) > > /proc/3124/fd/: > lrwx------ 1 root root 64 Jan 12 06:30 0 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 1 -> /dev/null > l-wx------ 1 root root 64 Jan 12 06:30 13 -> pipe:[1718] > lrwx------ 1 root root 64 Jan 12 06:30 2 -> /dev/null > lrwx------ 1 root root 64 Jan 12 06:30 3 -> > /etc/shorewall-lite/state/lock (deleted) > # lsof -n | grep state/lock > lock 1094 root 3u REG 0,14 5 13407 > /etc/shorewall-lite/state/lock (deleted) > lock 2507 root 3u REG 0,14 5 13415 > /etc/shorewall-lite/state/lock (deleted) > lock 3124 root 3u REG 0,14 5 13448 > /etc/shorewall-lite/state/lock (deleted) > lock 11770 root 3u REG 0,14 6 13663 > /etc/shorewall-lite/state/lock (deleted) > > I wonder if anyone has any theories on what is going on here? >
I do not -- here is the only code in Shorewall that invoked 'lock' (one line might appear folded by my mailer): mutex_on() { local try try=0 local lockf lockf=${LOCKFILE:=${VARDIR}/lock} local lockpid local lockd MUTEX_TIMEOUT=${MUTEX_TIMEOUT:-60} if [ $MUTEX_TIMEOUT -gt 0 ]; then lockd=$(dirname $LOCKFILE) [ -d "$lockd" ] || mkdir -p "$lockd" if [ -f $lockf ]; then lockpid=`cat ${lockf} 2> /dev/null` if [ -z "$lockpid" -o $lockpid = 0 ]; then rm -f ${lockf} error_message "WARNING: Stale lockfile ${lockf} removed" elif [ $lockpid -eq $$ ]; then return 0 elif ! ps | grep -v grep | qt grep ${lockpid}; then rm -f ${lockf} error_message "WARNING: Stale lockfile ${lockf} from pid ${lockpid} removed" fi fi if qt mywhich lockfile; then lockfile -${MUTEX_TIMEOUT} -r1 ${lockf} chmod u+w ${lockf} echo $$ > ${lockf} chmod u-w ${lockf} elif qt mywhich lock; then lock ${lockf} chmod u=r ${lockf} else while [ -f ${lockf} -a ${try} -lt ${MUTEX_TIMEOUT} ] ; do sleep 1 try=$((${try} + 1)) done if [ ${try} -lt ${MUTEX_TIMEOUT} ] ; then # Create the lockfile echo $$ > ${lockf} else echo "Giving up on lock file ${lockf}" >&2 fi fi fi } The part that invoked 'lock' was contributed, as I recall. -Tom -- Tom Eastep \ Q: What do you get when you cross a mobster with Shoreline, \ an international standard? Washington, USA \ A: Someone who makes you an offer you can't http://shorewall.org \ understand \_______________________________________________
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