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|
#!/bin/bash
#
# chkconfig: - 90 10
# description: Starts up stapshd instances for each SystemTap virtio-serial \
# port discovered.
#
# Should end up in init dir
if [ -f /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
fi
STAPSHD=@libexecdir@/systemtap/stapsh-daemon
STAPSH=@bindir@/stapsh
PORT_BASENAME="/dev/virtio-ports/org.systemtap.stapsh"
# Prints paths to available SystemTap ports and returns the number of ports
ports() {
count=0
for port in $PORT_BASENAME.*; do
if [[ $port =~ $PORT_BASENAME.[0-9]+ ]]; then
echo "$port"
count=$(expr $count + 1)
fi
done
return $count
}
count_missing() {
missing=0
for port in $(ports); do
if [ ! -f "/run/stapshd.$(basename $port).pid" ]; then
missing=$(expr $missing + 1)
fi
done
return $missing
}
# Start stapshd instances
start() {
prts=$(ports)
if [ $? -eq 0 ]; then
echo "no ports detected" >&2
# This shouldn't be an error
return 0
fi
count_missing
if [ $? -eq 0 ]; then
echo "already running" >&2
return 0
fi
for port in $prts; do
pidfile="/run/stapshd.$(basename $port).pid"
if [ ! -f "$pidfile" ]; then
$STAPSHD "$port" &>/dev/null &
echo $! > $pidfile
fi
done
return 0
}
# First stops stapshd instances and then the stapsh instances
stop() {
for pidfile in /run/stapshd.$(basename $PORT_BASENAME).*.pid; do
if [ -f "$pidfile" ]; then
killproc -p $pidfile stapshd
fi
# Delete PID file if killproc didn't do it
if [ -f "$pidfile" ]; then
rm $pidfile
fi
done
for pidfile in /run/stapsh.$(basename $PORT_BASENAME).*.pid; do
if [ -f "$pidfile" ]; then
killproc -p $pidfile stapsh
fi
# Delete PID file if killproc didn't do it
if [ -f "$pidfile" ]; then
rm $pidfile
fi
done
return 0
}
# Only restart if we're running
condrestart() {
if [ -f "/run/stapshd.$(basename $PORT_BASENAME).*.pid" ]; then
stop
start
fi
return 0
}
# Check if there's a stapshd instance for each port
status() {
prts=$(ports)
if [ $? -eq 0 ]; then
echo "not running" >&2
return 3
fi
count_missing
if [ $? -eq 0 ]; then
echo "running"
return 0
else
echo "missing $missing stapshd instances"
return 3
fi
}
# Stops any stapshd instances that are still running for a non-existent port
# and starts stapshd instances for any port that doesn't have one
reload() {
for pidfile in /run/stapshd.$(basename $PORT_BASENAME).*.pid; do
chardev=$(basename $pidfile .pid) # trim /run and .pid
chardev=${chardev#stapshd.} # trim leading 'stapshd.'
if [ -f "$pidfile" -a ! -c "/dev/virtio-ports/$chardev" ]; then
killproc -p $pidfile stapshd
# Delete PID file if killproc didn't do it
if [ -f "$pidfile" ]; then
rm $pidfile
fi
fi
done
for pidfile in /run/stapsh.$(basename $PORT_BASENAME).*.pid; do
chardev=$(basename $pidfile .pid) # trim /run and .pid
chardev=${chardev#stapsh.} # trim leading 'stapsh.'
if [ -f "$pidfile" -a ! -c "/dev/virtio-ports/$chardev" ]; then
killproc -p $pidfile stapsh
# Delete PID file if killproc didn't do it
if [ -f "$pidfile" ]; then
rm $pidfile
fi
fi
done
start
}
# Main logic
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status
;;
restart)
stop
start
;;
condrestart|try-restart)
condrestart
;;
reload)
reload
;;
*)
echo "Usage: $0 {start|stop|restart|reload|condrestart|status}"
exit 1
esac
exit $?
|
