Add silly process monitor script to distribution.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

contrib/Makefile.am

@@ -1,4 +1,4 @@
 SUBDIRS    = alpine debian void
 docsdir   := @docdir@/contrib
-docs_DATA  = README.md finit.conf
+docs_DATA  = README.md finit.conf procmon.sh
 EXTRA_DIST = $(docs_DATA)

contrib/procmon.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+USAGE="Usage: $0 processName"
+LOG_FILE="/tmp/memusage.csv"
+ELAPSED_TIME=0
+PERIOD=1        # seconds
+
+if [ $# -ne 1 ]; then
+        echo $USAGE
+        exit 1
+fi
+
+echo "ElapsedTime,VmSize,VmRSS" > $LOG_FILE
+
+# Monitor memory usage forever until script is killed
+while :
+do
+        SUM_VM_SIZE=0
+        SUM_RSS_SIZE=0
+        # In case the monitored process has not yet started
+        # keep searching until its PID is found
+        PROCESS_PIDS=""
+        while :
+        do
+                PROCESS_PIDS=`/bin/pidof $1`
+                if [ "$PROCESS_PIDS.X" != ".X" ]; then
+                        break
+                fi
+        done
+
+        for PID in ${PROCESS_PIDS} ; do
+                VM_SIZE=`awk '/VmSize/ {print $2}' < /proc/$PID/status`
+                if [ "$VM_SIZE.X" = ".X" ]; then
+                        continue
+                fi
+                #echo exprVM_ $SUM_VM_SIZE + $VM_SIZE
+                SUM_VM_SIZE=`expr $SUM_VM_SIZE + $VM_SIZE`
+
+                VM_RSS=`awk '/VmRSS/ {print $2}' < /proc/$PID/status`
+                if [ "$VM_RSS.X" = ".X" ]; then
+                        continue
+                fi
+                SUM_RSS_SIZE=`expr $SUM_RSS_SIZE + $VM_RSS`
+        done
+        echo "$ELAPSED_TIME sec, $SUM_VM_SIZE KB, $SUM_RSS_SIZE KB"
+        echo "$ELAPSED_TIME,$SUM_VM_SIZE,$SUM_RSS_SIZE" >> $LOG_FILE
+        sleep $PERIOD
+        VM_SIZE=""
+        VM_RSS=""
+        # Needs to get actual elapsed time instead of doing this
+        ELAPSED_TIME=`expr $ELAPSED_TIME + $PERIOD`
+done