PID=`cat .pid`
# Send operation:
-[ "$1" = "" ] && _exit "Usage: $0 <operation string>; i.e.: $0 help"
-echo $1 > sigusr2.in
+[ "$1" = "" ] && _exit "Usage: $0 [-f] <content: operation string or file (one operation per line) if '-f' provided>; i.e.: $0 help, $0 -f myOperationsList.txt"
+FILE=
+[ "$1" = "-f" ] && FILE=$2
+
+if [ -z "$FILE" ]
+then
+ echo $1 > sigusr2.in
+else
+ [ ! -f "$FILE" ] && _exit "Can't found provided file '$FILE'."
+ grep -v "^#" $FILE | sed '/^[ \t]*$/d' > sigusr2.in
+fi
+0> sigusr2.out
+kill -0 $PID 2>/dev/null
+[ $? -ne 0 ] && _exit "Operation error: missing process with pid $PID"
kill -s SIGUSR2 $PID
-#echo "You could see results on '`pwd`/sigusr2.out' file."
-cat `pwd`/sigusr2.out 2>/dev/null
-echo
+# Detect EOF and print all except that last line:
+while [ -z "$(tail -1 sigusr2.out | grep ^EOF)" ]; do sleep 0.1; done
+head --lines=-1 `pwd`/sigusr2.out