initial commit
This commit is contained in:
Fabio Scotto di Santolo
570
chapter10/proc_watch_timed.ksh
Executable file
570
chapter10/proc_watch_timed.ksh
Executable file
@@ -0,0 +1,570 @@
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#!/bin/ksh
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#
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# SCRIPT: proc_watch_timed.ksh
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# AUTHOR: Randy Michael
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# DATE: 09-14-2007
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# REV: 1.0.P
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# PLATFORM: Not Platform Dependent
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#
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# PURPOSE: This script is used to monitor and log
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# the status of a process as it starts and stops.
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# Command line options are used to identify the target
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# process to monitor and the length of time to monitor.
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# Each event is logged to the file defined by the
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# $LOGFILE variable. This script also has the ability
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# to execute pre, startup, and post events. These are
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# controlled by the $RUN_PRE_EVENT, $RUN_STARTUP_EVENT,
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# and $RUN_POST_EVENT variables. These variables control
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# execution individually. Whatever is to be executed is to
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# be placed in either the "pre_event_script",
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# startup_event_script, or the
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# "post_event_script" functions, or in any combination.
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# Timing is controlled on the command line.
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#
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# USAGE: $SCRIPT_NAME total_seconds target_process
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#
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# Will monitor the specified process for the
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# specified number of seconds.
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#
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# USAGE: $SCRIPT_NAME [-s|-S seconds] [-m|-M minutes]
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# [-h|-H hours] [-d|-D days]
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# [-p|-P process]
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#
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# Will monitor the specified process for number of
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# seconds specified within -s seconds, -m minutes,
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# -h hours, and -d days. Any combination of command
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# switches can be used.
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#
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# REV LIST:
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#
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# set -x # Uncomment to debug this script
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# set -n # Uncomment to check syntax without ANY execution
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#
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####################################################
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########## DEFINE FILES AND VARIABLES HERE #########
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####################################################
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typeset -u RUN_PRE_EVENT # Force to UPPERCASE
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typeset -u RUN_STARTUP_EVENT # Force to UPPERCASE
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typeset -u RUN_POST_EVENT # force to UPPERCASE
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RUN_PRE_EVENT='N' # A 'Y' will execute, anything else will not
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RUN_STARTUP_EVENT='Y' # A 'Y' will execute, anything else will not
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RUN_POST_EVENT='Y' # A 'Y' will execute, anything else will not
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LOGFILE="/tmp/proc_status.log"
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[[ ! -s $LOGFILE ]] && touch $LOGFILE
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SCRIPT_NAME=$(basename $0)
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TTY=$(tty)
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INTERVAL="1" # Seconds between sampling
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JOBS=
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####################################################
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############# DEFINE FUNCTIONS HERE ################
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####################################################
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usage ()
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{
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echo "\n\n\t*****USAGE ERROR*****"
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echo "\n\nUSAGE: $SCRIPT_NAME seconds process"
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echo "\nWill monitor the specified process for the"
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echo "specified number of seconds."
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echo "\nUSAGE: $SCRIPT_NAME [-s|-S seconds] [-m|-M minutes]"
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echo " [-h|-H hours] [-d|-D days] [-p|-P process]\n"
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echo "\nWill monitor the specified process for number of"
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echo "seconds specified within -s seconds, -m minutes,"
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echo "-h hours and -d days. Any combination of command"
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echo "switches can be used.\n"
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echo "\nEXAMPLE: $SCRIPT_NAME 300 dtcalc"
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echo "\n\nEXAMPLE: $SCRIPT_NAME -m 5 -p dtcalc"
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echo "\nBoth examples will monitor the dtcalc process"
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echo "for 5 minutes. Can specify days, hours, minutes"
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echo "and seconds, using -d, -h, -m and -s\n\n"
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}
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####################################################
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trap_exit ()
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{
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# set -x # Uncommant to debug this function
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# Log an ending time for process monitoring
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echo "INTERRUPT: Program Received an Interrupt...EXITING..." > $TTY
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echo "INTERRUPT: Program Received an Interrupt...EXITING..." >> $LOGFILE
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TIMESTAMP=$(date +%D@%T) # Get a new timestamp...
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echo "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \
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>> $TTY
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echo "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \
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>> $LOGFILE
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echo "LOGFILE: All Events are Logged ==> $LOGFILE \n" > $TTY
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# Kill all functions
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JOBS=$(jobs -p)
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if [[ ! -z $JOBS && $JOBS != '' && $JOBS != '0' ]]
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then
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kill $(jobs -p) 2>/dev/null 1>&2
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fi
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return 2
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}
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####################################################
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pre_event_script ()
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{
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# Put anything that you want to execute BEFORE the
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# monitored process STARTS in this function
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: # No-OP - Needed as a placeholder for an empty function
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# Comment Out the Above colon, ':'
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PRE_RC=$?
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return $PRE_RC
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}
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####################################################
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startup_event_script ()
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{
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# Put anything that you want to execute WHEN, or AS, the
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# monitored process STARTS in this function
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: # No-OP - Needed as a placeholder for an empty function
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# Comment Out the Above colon, ':'
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STARTUP_RC=$?
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return $STARTUP_RC
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}
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####################################################
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post_event_script ()
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{
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# Put anything that you want to execute AFTER the
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# monitored process ENDS in this function
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: # No-OP - Need as a placeholder for an empty function
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# Comment Out the Above colon, ':'
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POST_RC=$?
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return $POST_RC
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}
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####################################################
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# This function is used to test character strings
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test_string ()
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{
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if (( $# != 1 ))
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then
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echo 'ERROR'
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return
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fi
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C_STRING=$1
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# Test the character string for its composition
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case $C_STRING in
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+([0-9])) echo 'POS_INT' # Integer >= 0
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;;
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+([-0-9])) echo 'NEG_INT' # Integer < 0
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;;
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+([a-z])) echo 'LOW_CASE' # lower case text
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;;
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+([A-Z])) echo 'UP_CASE' # UPPER case text
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;;
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+([a-z]|[A-Z])) echo 'MIX_CASE' # MIxed CAse text
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;;
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*) echo 'UNKNOWN' # Anything else
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;;
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esac
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}
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####################################################
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proc_watch ()
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{
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# set -x # Uncomment to debug this function
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# This function does all of the process monitoring!
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while : # Loop Forever!!
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do
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case $RUN in
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'Y')
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# This will run the startup_event_script, which is a function
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if [[ $RUN_STARTUP_EVENT = 'Y' ]]
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then
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echo "STARTUP EVENT: Executing Startup Event Script..."\
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> $TTY
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echo "STARTUP EVENT: Executing Startup Event Script..."\
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>> $LOGFILE
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startup_event_script # USER DEFINED FUNCTION!!!
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RC=$? # Check the Return Code!!
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if (( "RC" == 0 ))
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then
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echo "SUCCESS: Startup Event Script Completed RC - \
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${RC}" > $TTY
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echo "SUCCESS: Startup Event Script Completed RC - \
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${RC}" >> $LOGFILE
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|
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else
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echo "FAILURE: Startup Event Script FAILED RC - \
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${RC}" > $TTY
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echo "FAILURE: Startup Event Script FAILED RC - \
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${RC}" >> $LOGFILE
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fi
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fi
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integer PROC_COUNT='-1' # Reset the Counters
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integer LAST_COUNT='-1'
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# Loop until the process(es) end(s)
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until (( "PROC_COUNT" == 0 ))
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do
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# This function is a Co-Process. $BREAK checks to see if
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# "Program Interrupt" has taken place. If so BREAK will
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||||
# be 'Y' and we exit both the loop and function.
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read BREAK
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if [[ $BREAK = 'Y' ]]
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then
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return 3
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fi
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PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" \
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| grep -v $SCRIPT_NAME \
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| grep $PROCESS | wc -l) >/dev/null 2>&1
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if (( "LAST_COUNT" > 0 && "LAST_COUNT" != "PROC_COUNT" ))
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then
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# The Process Count has Changed...
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TIMESTAMP=$(date +%D@%T)
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# Get a list of the PID of all of the processes
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PID_LIST=$(ps aux | grep -v "grep $PROCESS" \
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| grep -v $SCRIPT_NAME \
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| grep $PROCESS | awk '{print $2}')
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echo "PROCESS COUNT: $PROC_COUNT $PROCESS\
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Processes Running ==> $TIMESTAMP" >> $LOGFILE &
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echo "PROCESS COUNT: $PROC_COUNT $PROCESS\
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Processes Running ==> $TIMESTAMP" > $TTY
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echo ACTIVE PIDS: $PID_LIST >> $LOGFILE &
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echo ACTIVE PIDS: $PID_LIST > $TTY
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fi
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LAST_COUNT=$PROC_COUNT
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sleep $INTERVAL # Needed to reduce CPU load!
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done
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RUN='N' # Turn the RUN Flag Off
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TIMESTAMP=$(date +%D@%T)
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echo "ENDING PROCESS: $PROCESS END time ==>\
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$TIMESTAMP" >> $LOGFILE &
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echo "ENDING PROCESS: $PROCESS END time ==>\
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$TIMESTAMP" > $TTY
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# This will run the post_event_script, which is a function
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if [[ $RUN_POST_EVENT = 'Y' ]]
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then
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echo "POST EVENT: Executing Post Event Script..."\
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> $TTY
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echo "POST EVENT: Executing Post Event Script..."\
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>> $LOGFILE &
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post_event_script # USER DEFINED FUNCTION!!!
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integer RC=$?
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if (( "RC" == 0 ))
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then
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echo "SUCCESS: Post Event Script Completed RC - \
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${RC}" > $TTY
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echo "SUCCESS: Post Event Script Completed RC - \
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${RC}" >> $LOGFILE
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else
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echo "FAILURE: Post Event Script FAILED RC - ${RC}"\
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> $TTY
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echo "FAILURE: Post Event Script FAILED RC - ${RC}"\
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>> $LOGFILE
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fi
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fi
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;;
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'N')
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# This will run the pre_event_script, which is a function
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if [[ $RUN_PRE_EVENT = 'Y' ]]
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then
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echo "PRE EVENT: Executing Pre Event Script..." > $TTY
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echo "PRE EVENT: Executing Pre Event Script..." >> $LOGFILE
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|
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pre_event_script # USER DEFINED FUNCTION!!!
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RC=$? # Check the Return Code!!!
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if (( "RC" == 0 ))
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then
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echo "SUCCESS: Pre Event Script Completed RC - ${RC}"\
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> $TTY
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echo "SUCCESS: Pre Event Script Completed RC - ${RC}"\
|
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>> $LOGFILE
|
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else
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echo "FAILURE: Pre Event Script FAILED RC - ${RC}"\
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> $TTY
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echo "FAILURE: Pre Event Script FAILED RC - ${RC}"\
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>> $LOGFILE
|
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fi
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fi
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echo "WAITING: Waiting for $PROCESS to \
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startup...Monitoring..."
|
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|
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integer PROC_COUNT='-1' # Initialize to a fake value
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|
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# Loop until at least one process starts
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|
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until (( "PROC_COUNT" > 0 ))
|
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do
|
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# This is a Co-Process. This checks to see if a "Program
|
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# Interrupt" has taken place. If so BREAK will be 'Y' and
|
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# we exit both the loop and function
|
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|
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read BREAK
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if [[ $BREAK = 'Y' ]]
|
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then
|
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return 3
|
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fi
|
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|
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PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" \
|
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| grep -v $SCRIPT_NAME | grep $PROCESS | wc -l) \
|
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>/dev/null 2>&1
|
||||
|
||||
sleep $INTERVAL # Needed to reduce CPU load!
|
||||
done
|
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|
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RUN='Y' # Turn the RUN Flag On
|
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|
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TIMESTAMP=$(date +%D@%T)
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|
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PID_LIST=$(ps aux | grep -v "grep $PROCESS" \
|
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| grep -v $SCRIPT_NAME \
|
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| grep $PROCESS | awk '{print $2}')
|
||||
|
||||
if (( "PROC_COUNT" == 1 ))
|
||||
then
|
||||
echo "START PROCESS: $PROCESS START time ==>\
|
||||
$TIMESTAMP" >> $LOGFILE &
|
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echo ACTIVE PIDS: $PID_LIST >> $LOGFILE &
|
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echo "START PROCESS: $PROCESS START time ==>\
|
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$TIMESTAMP" > $TTY
|
||||
echo ACTIVE PIDS: $PID_LIST > $TTY
|
||||
elif (( "PROC_COUNT" > 1 ))
|
||||
then
|
||||
echo "START PROCESS: $PROC_COUNT $PROCESS\
|
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Processes Started: START time ==> $TIMESTAMP" >> $LOGFILE &
|
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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 #######################
|
||||
####################################################
|
||||
|
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### SET A TRAP ####
|
||||
|
||||
trap 'BREAK='Y';print -p $BREAK 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
|
||||
integer TOTAL_SECONDS=0
|
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|
||||
# 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 <= 0 )) || [ -z $PROCESS ]
|
||||
then
|
||||
# Either There are No Seconds to Count or the
|
||||
# $PROCESS Variable is Null...USAGE ERROR...
|
||||
|
||||
usage
|
||||
exit 1
|
||||
fi
|
||||
|
||||
########### START MONITORING HERE!###########
|
||||
|
||||
echo "\nCurrently running $PROCESS processes:\n" > $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 >$TTY # Send a blank line to the screen
|
||||
|
||||
(( PROC_RC != 0 )) && echo "\nThere are no $PROCESS processes running\n"
|
||||
|
||||
if (( PROC_RC == 0 )) # The Target Process(es) is/are running...
|
||||
then
|
||||
RUN='Y' # Set the RUN flag to true, or yes.
|
||||
|
||||
integer PROC_COUNT # Strips out the "padding" for display
|
||||
|
||||
PROC_COUNT=$(ps aux | grep -v "grep $PROCESS" | grep -v \
|
||||
$SCRIPT_NAME | grep $PROCESS | wc -l) >/dev/null 2>&1
|
||||
if (( PROC_COUNT == 1 ))
|
||||
then
|
||||
echo "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
|
||||
|
||||
##### 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 $VARIABLE" to transfer the variable.s
|
||||
# value back to the background co-process.
|
||||
###################################
|
||||
|
||||
proc_watch |& # Create a Background Co-Process!!
|
||||
WATCH_PID=$! # Get the process ID of the last background job!
|
||||
|
||||
# Start the Count Down!
|
||||
|
||||
integer SECONDS_LEFT=$TOTAL_SECONDS
|
||||
|
||||
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 "MON_STOPPED: Monitoring for $PROCESS ended ==> $TIMESTAMP\n" \
|
||||
| tee -a $LOGFILE
|
||||
|
||||
echo "LOGFILE: All Events are Logged ==> $LOGFILE \n"
|
||||
|
||||
# Tell the proc_watch function to break out of the loop and die
|
||||
BREAK='Y'
|
||||
print -p $BREAK 2>/dev/null
|
||||
|
||||
kill $WATCH_PID 2>/dev/null
|
||||
|
||||
exit 0
|
||||
|
||||
# End of Script
|
||||
Reference in New Issue
Block a user