Bash script to check running process [duplicate]

Answer 1

#!/bin/bash
ps axho comm| grep $1 > /dev/null
result=$?
echo "exit code: ${result}"
if [ "${result}" -eq "0" ] ; then
echo "`date`: $SERVICE service running, everything is fine"
else
echo "`date`: $SERVICE is not running"
/etc/init.d/$1 restart
fi

Something like this

Answer 2

I was wondering if it would be a good idea to have progressive attempts at a process, so you pass this func a process name func_terminate_process "firefox" and it tires things more nicely first, then moves on to kill.

# -- NICE: try to use killall to stop process(s)
killall ${1} > /dev/null 2>&1 ;sleep 10

# -- if we do not see the process, just end the function
pgrep ${1} > /dev/null 2>&1 || return

# -- UGLY: Step trough every pid and use kill -9 on them individually
for PID in $(pidof ${1}) ;do

    echo "Terminating Process: [${1}], PID [${PID}]" 
    kill -9 ${PID} ;sleep 10

    # -- NASTY: If kill -9 fails, try SIGTERM on PID
    if ps -p ${PID} > /dev/null ;then
        echo "${PID} is still running, forcefully terminating with SIGTERM"
        kill -SIGTERM ${PID}  ;sleep 10
    fi

done

# -- If after all that, we still see the process, report that to the screen.
pgrep ${1} > /dev/null 2>&1 && echo "Error, unable to terminate all or any of [${1}]" || echo "Terminate process [${1}] : SUCCESSFUL"

Answer 3

I use this one to check every 10 seconds process is running and start if not and allows multiple arguments:

#!/bin/sh

PROCESS="$1"
PROCANDARGS=$*

while :
do
    RESULT=`pgrep ${PROCESS}`

    if [ "${RESULT:-null}" = null ]; then
            echo "${PROCESS} not running, starting "$PROCANDARGS
            $PROCANDARGS &
    else
            echo "running"
    fi
    sleep 10
done