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# 本代码是将ksh的协进程改为bash的协进程管理， # bash4.0以后支持coprocesses(协进程) # Auth:qfongv8 # Sites:selinuxplus.com # #代码如下： # REV LIST: # # set -x # Uncomment to debug this script # set -n # Uncomment to check syntax without ANY execution # #################################################### ########## DEFINE FILES AND VARIABLES HERE ######### #################################################### typeset -u RUN_PRE_EVENT # Force to UPPERCASE typeset -u RUN_STARTUP_EVENT # Force to UPPERCASE typeset -u RUN_POST_EVENT # force to UPPERCASE RUN_PRE_EVENT='Y' # A 'Y' will execute, anything else will not RUN_STARTUP_EVENT='Y' # A 'Y' will execute, anything else will not RUN_POST_EVENT='Y' # A 'Y' will execute, anything else will not LOGFILE="/var/log/svmm.log" [[ ! -s $LOGFILE ]] && touch $LOGFILE SCRIPT_NAME=$(basename $0) #TTY=$(tty) TTY="/dev/null" INTERVAL="1" # Seconds between sampling JOBS= #################################################### ############# DEFINE FUNCTIONS HERE ################ #################################################### usage () { echo -e "\n\n\t***** USAGE ERROR *****" echo -e "\n\nUSAGE: $SCRIPT_NAME seconds process" echo -e "\nWill monitor the specified process for the" echo -e "specified number of seconds." echo -e "\nUSAGE: $SCRIPT_NAME [-s|-S seconds] [-m|-M minutes]" echo -e " [-h|-H hours] [-d|-D days] [-p|-P process]\n" echo -e "\nWill monitor the specified process for number of" echo -e "seconds specified within -s seconds, -m minutes," echo -e "-h hours and -d days. Any combination of command" echo -e "switches can be used.\n" echo -e "\nEXAMPLE: $SCRIPT_NAME 300 dsvmm" echo -e "\n\nEXAMPLE: $SCRIPT_NAME -m 5 -p dsvmm" echo -e "\nBoth examples will monitor the dtcalc process" echo -e "for 5 minutes. Can specify days, hours, minutes" echo -e "and seconds, using -d, -h, -m and -s\n\n" } #################################################### trap_exit () { # set -x # Uncommant to debug this function # Log an ending time for process monitoring echo "INTERRUPT: Program Received an Interrupt...EXITING..." > $TTY echo "INTERRUPT: Program Received an Interrupt...EXITING..." >> $LOGFILE TIMESTAMP=$(date +%D@%T) # Get a new timestamp... echo -e "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \ >> $TTY echo -e "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \ >> $LOGFILE echo -e "LOGFILE: All Events are Logged ==> $LOGFILE \n" > $TTY # Kill all functions JOBS=$(jobs -p) if [[ ! -z $JOBS && $JOBS != '' && $JOBS != '0' ]] then kill $(jobs -p) 2>/dev/null 1>&2 fi return 2 } #################################################### pre_event_script () { # Put anything that you want to execute BEFORE the # monitored process STARTS in this function : # No-OP - Needed as a placeholder for an empty function # Comment Out the Above colon, ':' svmmd stop && true svmmd start PRE_RC=$? return $PRE_RC } #################################################### startup_event_script () { # Put anything that you want to execute WHEN, or AS, the # monitored process STARTS in this function : # No-OP - Needed as a placeholder for an empty function # Comment Out the Above colon, ':' STARTUP_RC=$? return $STARTUP_RC } #################################################### post_event_script () { # Put anything that you want to execute AFTER the # monitored process ENDS in this function : # No-OP - Need as a placeholder for an empty function # Comment Out the Above colon, ':' POST_RC=$? return $POST_RC } #################################################### # This function is used to test character strings test_string () { if (( $# != 1 )) then echo 'ERROR' return fi C_STRING=$1 # Test the character string for its composition case $C_STRING in [0-9]) echo 'POS_INT' # Integer >= 0 ;; [-0-9]) echo 'NEG_INT' # Integer < 0 ;; [a-z]) echo 'LOW_CASE' # lower case text ;; [A-Z]) echo 'UP_CASE' # UPPER case text ;; [a-z]|[A-Z]) echo 'MIX_CASE' # MIxed CAse text ;; *) echo 'UNKNOWN' # Anything else ;; esac } #################################################### proc_watch () { # set -x # Uncomment to debug this function # This function does all of the process monitoring! while : # Loop Forever!! do case $RUN in 'Y') # This will run the startup_event_script, which is a function if [[ $RUN_STARTUP_EVENT = 'Y' ]] then echo "STARTUP EVENT: Executing Startup Event Script..."\ > $TTY echo "STARTUP EVENT: Executing Startup Event Script..."\ >> $LOGFILE startup_event_script # USER DEFINED FUNCTION!!! RC=$? # Check the Return Code!! if (( "RC" == 0 )) then echo "SUCCESS: Startup Event Script Completed RC - \ ${RC}" > $TTY echo "SUCCESS: Startup Event Script Completed RC - \ ${RC}" >> $LOGFILE else echo "FAILURE: Startup Event Script FAILED RC - \ ${RC}" > $TTY echo "FAILURE: Startup Event Script FAILED RC - \ ${RC}" >> $LOGFILE fi fi declare -i PROC_COUNT='-1' # Reset the Counters declare -i LAST_COUNT='-1' # Loop until the process(es) end(s) until (( "PROC_COUNT" == 0 )) do # This function is a Co-Process. $BREAK checks to see if # "Program Interrupt" has taken place. If so BREAK will # be 'Y' and we exit both the loop and function. PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" \ | grep -v $SCRIPT_NAME \ | grep $PROCESS | wc -l) >/dev/null 2>&1 #echo $PROC_COUNT > $TTY if (( "LAST_COUNT" > 0 && "LAST_COUNT" != "PROC_COUNT" )) then # The Process Count has Changed... TIMESTAMP=$(date +%D@%T) # Get a list of the PID of all of the processes PID_LIST=$(ps aux | grep -v "grep $PROCESS" \ | grep -v $SCRIPT_NAME \ | grep $PROCESS | awk '{print $2}') echo "PROCESS COUNT: $PROC_COUNT $PROCESS\ Processes Running ==> $TIMESTAMP" >> $LOGFILE & echo "PROCESS COUNT: $PROC_COUNT $PROCESS\ Processes Running ==> $TIMESTAMP" > $TTY echo ACTIVE PIDS: $PID_LIST >> $LOGFILE & echo ACTIVE PIDS: $PID_LIST > $TTY fi LAST_COUNT=$PROC_COUNT sleep $INTERVAL # Needed to reduce CPU load! done RUN='N' # Turn the RUN Flag Off TIMESTAMP=$(date +%D@%T) echo "ENDING PROCESS: $PROCESS END time ==>\ $TIMESTAMP" >> $LOGFILE & echo "ENDING PROCESS: $PROCESS END time ==>\ $TIMESTAMP" > $TTY # This will run the post_event_script, which is a function if [[ $RUN_POST_EVENT = 'Y' ]] then echo "POST EVENT: Executing Post Event Script..."\ > $TTY echo "POST EVENT: Executing Post Event Script..."\ >> $LOGFILE & post_event_script # USER DEFINED FUNCTION!!! declare -i RC=$? if (( "RC" == 0 )) then echo "SUCCESS: Post Event Script Completed RC - \ ${RC}" > $TTY echo "SUCCESS: Post Event Script Completed RC - \ ${RC}" >> $LOGFILE else echo "FAILURE: Post Event Script FAILED RC - ${RC}"\ > $TTY echo "FAILURE: Post Event Script FAILED RC - ${RC}"\ >> $LOGFILE fi fi ;; 'N') # This will run the pre_event_script, which is a function if [[ $RUN_PRE_EVENT = 'Y' ]] then echo "PRE EVENT: Executing Pre Event Script..." > $TTY echo "PRE EVENT: Executing Pre Event Script..." >> $LOGFILE pre_event_script # USER DEFINED FUNCTION!!! RC=$? # Check the Return Code!!! if (( "RC" == 0 )) then echo "SUCCESS: Pre Event Script Completed RC - ${RC}"\ > $TTY echo "SUCCESS: Pre Event Script Completed RC - ${RC}"\ >> $LOGFILE else echo "FAILURE: Pre Event Script FAILED RC - ${RC}"\ > $TTY echo "FAILURE: Pre Event Script FAILED RC - ${RC}"\ >> $LOGFILE fi fi echo "WAITING: Waiting for $PROCESS to \ startup...Monitoring..." >$TTY declare -i PROC_COUNT='-1' # Initialize to a fake value # echo $PROC_COUNT >$TTY # Loop until at least one process starts until (( "PROC_COUNT" > 0 )) do # This is a Co-Process. This checks to see if a "Program # Interrupt" has taken place. If so BREAK will be 'Y' and # we exit both the loop and function PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" \ | grep -v $SCRIPT_NAME | grep $PROCESS | wc -l) \ >/dev/null 2>&1 # echo $PROC_COUNT > $TTY sleep $INTERVAL # Needed to reduce CPU load! done RUN='Y' # Turn the RUN Flag On TIMESTAMP=$(date +%D@%T) PID_LIST=$(ps aux | grep -v "grep $PROCESS" \ | grep -v $SCRIPT_NAME \ | grep $PROCESS | awk '{print $2}') if (( "PROC_COUNT" == 1 )) then # echo test************************** >$TTY echo "START PROCESS: $PROCESS START time ==>\ $TIMESTAMP" >> $LOGFILE & echo ACTIVE PIDS: $PID_LIST >> $LOGFILE & echo "START PROCESS: $PROCESS START time ==>\ $TIMESTAMP" > $TTY echo ACTIVE PIDS: $PID_LIST > $TTY elif (( "PROC_COUNT" > 1 )) then echo "START PROCESS: $PROC_COUNT $PROCESS\ Processes Started: START time ==> $TIMESTAMP" >> $LOGFILE & echo ACTIVE PIDS: $PID_LIST >> $LOGFILE & echo "START PROCESS: $PROC_COUNT $PROCESS\ Processes Started: START time ==> $TIMESTAMP" > $TTY echo ACTIVE PIDS: $PID_LIST > $TTY fi ;; esac done } #################################################### ############## START OF MAIN ####################### #################################################### ### SET A TRAP #### trap 'kill -9 $COPROC_PID 2>/dev/null;trap_exit \ 2>/dev/null;exit 0' 1 2 3 15 BREAK='N' # The BREAK variable is used in the co-process proc_watch PROCESS= # Initialize to null declare -i TOTAL_SECONDS=0 #print -p $BREAK # Check commnand line arguments if (( $# > 10 || $# < 2 )) then usage exit 1 fi # Check to see if only the seconds and a process are # the only arguments if [[ ($# -eq 2) && ($1 != -*) && ($2 != -*) ]] then NUM_TEST=$(test_string $1) # Is this an Integer? if [[ "$NUM_TEST" = 'POS_INT' ]] then TOTAL_SECONDS=$1 # Yep - It.s an Integer PROCESS=$2 # Can be anything else usage exit 1 fi else # Since getopts does not care what arguments it gets, let.s # do a quick sanity check to make sure that we only have # between 2 and 10 arguments and the first one must start # with a -* (hyphen and anything), else usage error case "$#" in [2-10]) if [[ $1 != -* ]]; then usage; exit 1 fi ;; esac HOURS=0 # Initialize all to zero MINUTES=0 SECS=0 DAYS=0 # Use getopts to parse the command line arguments # For each $OPTARG for DAYS, HOURS, MINUTES and DAYS check to see # that each one is an integer by using the check_string function while getopts ":h:H:m:M:s:S:d:D:P:p:" OPT_LIST 2>/dev/null do case $OPT_LIST in h|H) [[ $(test_string $OPTARG) != 'POS_INT' ]] && usage && exit 1 (( HOURS = $OPTARG * 3600 )) # 3600 seconds per hour ;; m|H) [[ $(test_string $OPTARG) != 'POS_INT' ]] && usage && exit 1 (( MINUTES = $OPTARG * 60 )) # 60 seconds per minute ;; s|S) [[ $(test_string $OPTARG) != 'POS_INT' ]] && usage && exit 1 SECS="$OPTARG" # seconds are seconds ;; d|D) [[ $(test_string $OPTARG) != 'POS_INT' ]] && usage && exit 1 (( DAYS = $OPTARG * 86400 )) # 86400 seconds per day ;; p|P) PROCESS=$OPTARG # process can be anything ;; \?) usage # USAGE ERROR exit 1 ;; :) usage exit 1 ;; *) usage exit 1 ;; esac done fi # We need to make sure that we have a process that # is NOT null or empty! - sanity check - The double quotes are required! if [[ -z "$PROCESS" || "$PROCESS" = '' ]] then usage exit 1 fi # Check to see that TOTAL_SECONDS was not previously set if (( TOTAL_SECONDS == 0 )) then # Add everything together if anything is > 0 if [[ $SECS -gt 0 || $MINUTES -gt 0 || $HOURS -gt 0 \ || $DAYS -gt 0 ]] then (( TOTAL_SECONDS = SECS + MINUTES + HOURS + DAYS )) fi fi # Last Sanity Check! if (( TOTAL_SECONDS $TTY ps aux | grep -v "grep $PROCESS" | grep -v $SCRIPT_NAME \ | grep $PROCESS > $TTY PROC_RC=$? # Get the initial state of the monitored function echo $PROC_RC echo >$TTY # Send a blank line to the screen (( PROC_RC != 0 )) && echo -e "\nThere are no $PROCESS processes running\n" if (( PROC_RC == 0 )) # The Target Process(es) is/are running... then RUN='Y' # Set the RUN flag to true, or yes. declare -i PROC_COUNT # Strips out the "padding" for display PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" | grep -v \ $SCRIPT_NAME | grep $PROCESS | wc -l) >/dev/null 2>&1 if (( PROC_COUNT == 1 )) then echo -e "The $PROCESS process is currently\ running...Monitoring... \n" elif (( PROC_COUNT > 1 )) then print "There are $PROC_COUNT $PROCESS processes currently\ running...Monitoring...\n" fi else echo "The $PROCESS process is not currently running...monitoring..." RUN='N' # Set the RUN flag to false, or no. fi TIMESTAMP=$(date +%D@%T) # Time that this script started monitoring # Get a list of the currently active process IDs PID_LIST=$(ps aux | grep -v "grep $PROCESS" \ | grep -v $SCRIPT_NAME \ | grep $PROCESS | awk '{print $2}') echo "MON_STARTED: Monitoring for $PROCESS began ==> $TIMESTAMP" \ | tee -a $LOGFILE echo ACTIVE PIDS: $PID_LIST | tee -a $LOGFILE #echo test***** ##### NOTICE #### # We kick off the "proc_watch" function below as a "Co-Process" # This sets up a two way communications link between the # "proc_watch" background function and this "MAIN BODY" of # the script. This is needed because the function has two # "infinite loops", with one always executing at any given time. # Therefore we need a way to break out of the loop in case of # an interrupt, i.e. CTRL+C, and when the countdown is complete. # The "pipe appersand", |&, creates the background Co-Process # and we use "print -p $VARIABLE" to transfer the variable.s # value back to the background co-process. ################################### <strong><span style="color: #ff0000;">coproc proc_watch # Create a Background Co-Process!!</span></strong> <strong><span style="color: #ff0000;"> WATCH_PID=$! # Get the process ID of the last background job!</span></strong> #echo "test over " # Start the Count Down! #echo $BREAK declare -i SECONDS_LEFT=$TOTAL_SECONDS echo $SECONDS_LEFT while (( SECONDS_LEFT > 0 )) do # Next send the current value of $BREAK to the Co-Process # proc_watch, which was piped to the background... print -p $BREAK 2>/dev/null (( SECONDS_LEFT = SECONDS_LEFT - 1 )) sleep 1 # 1 Second Between Counts done # Finished - Normal Timeout Exit... TIMESTAMP=$(date +%D@%T) # Get a new timestamp... echo -e "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \ | tee -a $LOGFILE echo -e "LOGFILE: All Events are Logged ==> $LOGFILE \n" # Tell the proc_watch function to break out of the loop and die kill -9 $COPROC_PID>/dev/null BREAK='Y' print -p $BREAK 2>/dev/null exit 0 # End of Script |