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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| #!/bin/sh | ||
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| SCRIPT="$(basename $0)" | ||
|
|
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| if [ -z "$(which flock)" ]; then | ||
| echo "$SCRIPT: ERROR - unable to locate 'flock' executable. Aborting." | ||
| exit | ||
| fi | ||
| LSOF=$(which lsof) | ||
| if [ -z "$LSOF" ]; then | ||
| echo "$SCRIPT: ERROR - unable to locate 'lsof' executable. Aborting." | ||
| exit | ||
| fi | ||
|
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||
| usage() { | ||
| cat <<EOH | ||
| Checks for and optionally removes stale service file locks. | ||
| Usage: $0 [options] | ||
| Options: | ||
| -r Removes any found stale locks | ||
| -C Adds or removes the scheduled cron job | ||
| EOH | ||
| exit | ||
| } | ||
|
|
||
| __REMOVE=n | ||
| while getopts :rC option; do | ||
| case "${option}" in | ||
| r) __REMOVE=y;; | ||
| C) if grep -q "$SCRIPT" /etc/crontabs/root; then | ||
| sed -e "/$SCRIPT/d" -i /etc/crontabs/root | ||
| echo "$SCRIPT: Scheduled file lock check has been removed." | ||
| else | ||
| echo "* * * * * $(cd $(dirname $0); pwd)/$SCRIPT -r" >> /etc/crontabs/root | ||
| echo "$SCRIPT: Scheduled file lock check for every minute." | ||
| fi | ||
| /etc/init.d/cron reload | ||
| exit;; | ||
| *) usage;; | ||
| esac | ||
| done | ||
|
|
||
| services="" | ||
| for pid in $(pgrep flock); do | ||
| blocked=$(( $(date '+%s') - $(date -r /proc/$pid '+%s') )) | ||
| if [ $blocked -ge 60 ]; then | ||
| fd=$(sed -e 's/^.*flock//' /proc/$pid/cmdline | tr '\0' ' ' | xargs) | ||
| if [ -n "$fd" ]; then | ||
| if echo -n "$fd" | grep -E '[0-9]*'; then | ||
| lockfile=$(readlink /proc/$pid/fd/$fd) | ||
| else | ||
| lockfile="$fd" | ||
| fi | ||
| ppid=$(grep -i ^PPId /proc/$pid/status | cut -d: -f2 | xargs) | ||
| service=$(basename $(grep -oE '/etc/init.d/[^\0]*' /proc/$ppid/cmdline)) | ||
| if [ -n "$service" ]; then | ||
| action=$(tr '\0' ' ' < /proc/$ppid/cmdline | grep -oE '/etc/init.d/.*' | cut -d' ' -f2- | xargs) | ||
| if [ -e "$lockfile" ]; then | ||
| pids=$($LSOF $lockfile | grep $lockfile | grep -v "\b$pid\b\|\b$ppid\b" | tr -s ' ' | cut -d' ' -f2 | xargs echo $pid $ppid) | ||
| else | ||
| pids="$pid $ppid" | ||
| fi | ||
| echo "$SCRIPT: BLOCKED service='$service' lockfile='$lockfile' action='$action' pids=' $pids'" | ||
| for p in $pids; do | ||
| echo "$SCRIPT: $(ps | grep "\b$p\b")" | ||
| done | ||
| if ! echo "$services" | grep -q "^$service"; then | ||
| if [ -z "$services" ]; then | ||
| services="$service#$lockfile#$action#" | ||
| else | ||
| services="$services\n$service#$lockfile#$action#" | ||
| fi | ||
| fi | ||
| services=$(echo -e "$services" | sed -e "s|^\b$service\b.*|& $pids|") | ||
| fi | ||
| fi | ||
| fi | ||
| done | ||
|
|
||
| if [ $__REMOVE = y -a -n "$services" ]; then | ||
| IFS='#' | ||
| echo -e "$services" | while read service lockfile action pids; do | ||
| [ -z "$service" -o -z "$lockfile" -o -z "$action" -o -z "$pids" ] && continue | ||
| echo "$SCRIPT: UNBLOCK service='$service' lockfile='$lockfile' action='$action' pids='$pids'" | ||
| rm $lockfile | ||
| kill $pids | ||
| /etc/init.d/$service $action | ||
| done | ||
| fi | ||
|
|
||
| exit 0 |