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Full Discussion: print out a line from a output file
Top Forums Shell Programming and Scripting print out a line from a output file Post 302316425 by deaconf19 on Friday 15th of May 2009 04:00:27 AM
Old 05-15-2009
Code:
 #!/bin/csh
foreach i (`grep xxx /etc/hosts |awk '{print $2}'`)
echo $i
ping ${i} 2 > /tmp/results 
end

Contents of the results file
Code:
 
herexxx001 is alive
herexxx002 is alive
no answer from herexxx003
no answer from herexxx004

Next line of code
Code:
 cat results |grep alive > /tmp/alive

contents of the alive file
Code:
herexxx001 is alive
herexxx002 is alive

Next Line of the script
Code:
cat /tmp/alive |awk '{print $1}' > /tmp/start

Contents of the start file
Code:
herexxx001
herexxx002

the last line of code
Code:
 foreach x (`grep xxx /tmp/start |awk '{print $1}'`)
echo $x
rsh ${x} init 6
end

my problem now is when i only execute the ping portion of the script i do not get the expected outcome. I have 5 clients that are on the network and alive and the rest of the clients are off. The results file only shows
Code:
herexxx021 is alive

when in fact there are 5 total and nothing else is in the file. did i redirect the out put incorrectly?
 

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LEARN ABOUT PHP

maxdb_ping

MAXDB_PING(3)								 1							     MAXDB_PING(3)

maxdb_ping - Pings a server connection, or tries to reconnect if the connection has gone down

       Procedural style

SYNOPSIS

       bool maxdb_ping (resource  $link)

DESCRIPTION

       Object oriented style
       bool maxdb::ping (void  )

	Checks	whether  the  connection  to the server is working. If it has gone down, and global option maxdb.reconnect is enabled an automatic
       reconnection is attempted.

	This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection  and  recon-
       nect if necessary.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      Object oriented style

	      <?php
	      $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* check if server is alive */
	      if ($maxdb->ping()) {
		 printf ("Our connection is ok!
");
	      } else {
		 printf ("Error: %s
", $maxdb->error);
	      }

	      /* close connection */
	      $maxdb->close();
	      ?>

       Example #2

	      Procedural style

	      <?php
	      $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

	      /* check connection */
	      if (maxdb_connect_errno()) {
		 printf("Connect failed: %s
", maxdb_connect_error());
		 exit();
	      }

	      /* check if server is alive */
	      if (maxdb_ping($link)) {
		 printf ("Our connection is ok!
");
	      } else {
		 printf ("Error: %s
", maxdb_error($link));
	      }

	      /* close connection */
	      maxdb_close($link);
	      ?>

       The above example will output something similar to:

       Our connection is ok!

PHP Documentation Group 													     MAXDB_PING(3)
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