Do while loop in a do while Post: 302574171

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Top Forums Shell Programming and Scripting Do while loop in a do while Post 302574171 by nitin on Wednesday 16th of November 2011 05:29:12 PM

11-16-2011

Registered User

Do while loop in a do while

Hi,
I've a script that is using do while loop. It reads some some stuf using ps command then calls a function. The function has another do while loop in it.
My problem is that when the second loop is completed, the script exits. The whole thing is a bit complex, I'll post some snippet here. Any suggestions will be appreciated like always.

Code:

TELNET_QUIT=/tmp/telnet_quit.tmp  # file for telnet sessions.  Suppress on screen display
TELNET_LOG=/tmp/telnet_`date +%Y-%m-%d`.tmp
TELNET_TEST=NULL
echo "QUIT">$TELNET_QUIT

function telnetTest {
 	echo "  Please wait. "
	while read -r -u3 LINE1; read -r -u4 LINE2;
		do
		telnet  $LINE1 $LINE2 <$TELNET_QUIT >$TELNET_LOG 2>&1
		wait $!
		TELNET_TEST=$(grep "Connection closed by foreign host." $TELNET_LOG | wc -l)
		if (($TELNET_TEST)); then
		   echo "  OK. $LINE2" >>/tmp/somelog
		else
		   echo "  Problem! $LINE2" >>/tmp/somelog
		fi
		sleep 4
		more $TELNET_LOG >>/tmp/somelog
	done 3< "$TMPFILE" 4< "$TMPFILE2"  # Works till here, then exits out completely 
} # End of function

function getmyInfo  {
# We get my_SERVERS_NUM value from some where… snip 
my_SERVERS_NUM=1  # hard coding for one only
my_SERVER=10.10.10.10
TMPFILE=/tmp/tmp1.out
echo 10.10.10.10>$TMPFILE
my_SERVER_PORT=9120
TMPFILE2=/tmp/tmp2.out
echo 9120 >$TMPFILE2

if [ $my_SERVERS_NUM -ge 2 ]; then
	echo "  Many servers to check. " 
	telnetTest
else
	echo "  Only one server to check. "
	telnetTest
fi
}  # End of function

ps -ef |  awk '/[m]yAgent/{print $8}' | while read lines ;
	do
    		set -- $lines
		my_PATH=`echo $lines | sed '$s/myAgent.bin$//'`
		echo -n "  Analyze this instance (y/n)? " 
		read answer</dev/tty
		if [ "$answer" = y ]  ; then	
		my_pid=`ps -ef | grep $line | grep -v grep | awk '{print $2}'`
		getmyInfo
		fi
	done

#some cleanup stuff
#EOF

Thanks for looking.

Nitin

nitin

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LEARN ABOUT REDHAT

mktemp

MKTEMP(1)						    BSD General Commands Manual 						 MKTEMP(1)

NAME

     mktemp -- make temporary file name (unique)

SYNOPSIS

     mktemp [-d] [-q] [-u] template

DESCRIPTION

     The mktemp utility takes the given file name template and overwrites a portion of it to create a file name.  This file name is unique and
     suitable for use by the application.  The template may be any file name with at least 6 of 'Xs' appended to it, for example /tmp/temp.XXXXXX.
     The trailing 'Xs' are replaced with the current process number and/or a unique letter combination.  The number of unique file names mktemp
     can return depends on the number of 'Xs' provided; six 'Xs' will result in mktemp testing roughly 26 ** 6 combinations.

     If mktemp can successfully generate a unique file name, the file is created with mode 0600 (unless the -u flag is given) and the filename is
     printed to standard output.

OPTIONS

     The available options are as follows:

     -d      Make a directory instead of a file.

     -q      Fail silently if an error occurs.	This is useful if a script does not want error output to go to standard error.

     -u      Operate in ``unsafe'' mode.  The temp file will be unlinked before mktemp exits.  This is slightly better than mktemp(3) but still
	     introduces a race condition.  Use of this option is not encouraged.

RETURN VALUES

     The mktemp utility exits with a value of 0 on success, and 1 on failure.

EXAMPLES

     The following sh(1) fragment illustrates a simple use of mktemp where the script should quit if it cannot get a safe temporary file.

	   TMPFILE=`mktemp /tmp/$0.XXXXXX` || exit 1
	   echo "program output" >> $TMPFILE

     In this case, we want the script to catch the error itself.

	   TMPFILE=`mktemp -q /tmp/$0.XXXXXX`
	   if [ $? -ne 0 ]; then
		   echo "$0: Can't create temp file, exiting..."
		   exit 1
	   fi

     Note that one can also check to see that $TMPFILE is zero length instead of checking $?.  This would allow the check to be done later one in
     the script (since $? would get clobbered by the next shell command).

SEE ALSO

     mkstemp(3), mktemp(3)

HISTORY

     The mktemp utility appeared in OpenBSD.

BSD
								November, 20, 1996							       BSD