mirror of
git://projects.qi-hardware.com/openwrt-packages.git
synced 2024-08-25 20:38:02 +03:00
173 lines
3.7 KiB
Bash
173 lines
3.7 KiB
Bash
#!/bin/sh
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#
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# safety wrapper for IBR-DTN daemon
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#
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# Tasks:
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# * start IBR-DTN daemon
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# * restart the daemon after a crash
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# * if respawning to fast, then slow down with backoff
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# * check for enough space on disk and delete bundles if necessary.
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# * clean the blob directory on startup
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#
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DTND=/usr/sbin/dtnd
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TMPCONF=/tmp/ibrdtn.config
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UCI=/sbin/uci
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getstate() {
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$UCI -P/var/state -q get ibrdtn.$1
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return $?
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}
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setstate() {
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$UCI -P/var/state -q set ibrdtn.$1=$2
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return $?
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}
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getconfig() {
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$UCI -q get ibrdtn.$1
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return $?
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}
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setconfig() {
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$UCI -q set ibrdtn.$1=$2
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return $?
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}
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# remove the old state file
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/bin/rm /var/state/ibrdtn
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# read uci configuration
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BLOB_PATH=`getconfig storage.blobs`
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BUNDLE_PATH=`getconfig storage.bundles`
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CONTAINER_PATH=`getconfig storage.path`
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CONTAINER_FILE=`getconfig storage.container`
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LOG_FILE=`getconfig main.logfile`
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ERR_FILE=`getconfig main.errfile`
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DEBUG_LEVEL=`getconfig main.debug`
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SAFEMODE=no
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# run a system check
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/bin/sh /usr/share/ibrdtn/systemcheck.sh
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if [ $? -eq 0 ]; then
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# mount container if specified
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if [ -n "$CONTAINER_FILE" ] && [ -n "$CONTAINER_PATH" ]; then
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/bin/sh /usr/share/ibrdtn/mountcontainer.sh
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# if the mount of the container failed
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# switch to safe mode!
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if [ $? -gt 0 ]; then
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SAFEMODE=yes
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fi
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fi
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else
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SAFEMODE=yes
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fi
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# create blob & bundle path
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if [ -n "$BLOB_PATH" ]; then
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/bin/mkdir -p $BLOB_PATH
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# clean the blob directory on startup
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/bin/rm -f $BLOB_PATH/file*
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fi
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if [ -n "$BUNDLE_PATH" ]; then
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/bin/mkdir -p $BUNDLE_PATH
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fi
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LOGGING=""
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if [ -n "$LOG_FILE" ]; then
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LOGGING="$LOGGING > $LOG_FILE"
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else
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LOGGING="$LOGGING > /dev/null"
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fi
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if [ -n "$ERR_FILE" ]; then
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LOGGING="$LOGGING 2> $ERR_FILE"
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else
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LOGGING="$LOGGING 2> /dev/null"
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fi
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if [ -z "$LOG_FILE" ] && [ -z "$ERR_FILE" ]; then
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LOGGING="-q"
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fi
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# check for debugging option
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if [ -n "$DEBUG_LEVEL" ]; then
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DEBUG_ARGS="-d ${DEBUG_LEVEL}"
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else
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DEBUG_ARGS=""
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fi
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# create configuration
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if [ "$SAFEMODE" == "yes" ]; then
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/bin/sh /usr/share/ibrdtn/build-config.sh --safe-mode $TMPCONF
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else
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/bin/sh /usr/share/ibrdtn/build-config.sh $TMPCONF
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fi
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# set the crash counter to zero
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CRASH=0
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# run the daemon
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setstate state running
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while [ "`getstate state`" == "running" ]; do
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# run a system check
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/bin/sh /usr/share/ibrdtn/systemcheck.sh
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# run in safe mode if the system check has failed
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if [ $? -gt 0 ] && [ "$SAFEMODE" == "no" ]; then
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SAFEMODE=yes
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/usr/bin/logger -t "ibrdtn-safe-wrapper" -p 2 "system check failed! Switch to safe-mode settings."
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/bin/sh /usr/share/ibrdtn/build-config.sh --safe-mode $TMPCONF
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fi
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# measure the running time
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TIMESTART=`/bin/date +%s`
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# run the daemon
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echo "${DTND} ${DEBUG_ARGS} -c ${TMPCONF} ${LOGGING}" | /bin/sh
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# measure the stopping time
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TIMESTOP=`/bin/date +%s`
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# calc the running time
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let TIMERUN=$TIMESTOP-$TIMESTART
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# reset the CRASH counter if there is one hour between the crashes
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if [ $TIMERUN -ge 3600 ]; then
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CRASH=0
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fi
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# check if the daemon is crashed
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if [ "`getstate state`" == "running" ]; then
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# if the crash counter is higher than 20 switch to safe-mode settings
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if [ $CRASH -eq 20 ] && [ "$SAFEMODE" == "no" ]; then
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SAFEMODE=yes
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/usr/bin/logger -t "ibrdtn-safe-wrapper" -p 2 "IBR-DTN daemon crashed 20 times! Switch to safe-mode settings."
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/bin/sh /usr/share/ibrdtn/build-config.sh --safe-mode $TMPCONF
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fi
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# increment the crash counter
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let CRASH=$CRASH+1
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# backoff wait timer
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let WAIT=2**$CRASH
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# set a upper limit for the wait time
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if [ $WAIT -ge 1800 ]; then
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WAIT=1800
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fi
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# log the crash
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/usr/bin/logger -t "ibrdtn-safe-wrapper" -p 2 "IBR-DTN daemon crashed $CRASH times! Wait $WAIT seconds."
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# wait sometime
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/bin/sleep $WAIT
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fi
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done
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