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Full Discussion: Handling Stdout&StdErr for background jobs.
Operating Systems Solaris Handling Stdout&StdErr for background jobs. Post 302200928 by alvinbush on Friday 30th of May 2008 10:32:10 AM
Old 05-30-2008
Handling Stdout&StdErr for background jobs.
Hello Friends,

sorry, i am not very familiar with Unix programming. Could you please help me on this?

We have to start different components from a startup script.

each components are started as below in the background in a startprocess function

$nohup $file $args >>$logFile 2>&1 &

after this the script calls some waiting method and waits in the logfile for some particular string as below

if grep -c "$pattern" $logFile>1; then ....

and go ahead with the next component.


We have now the problem that the background jobs continue writing into the log file even after startup and covering the disk space.
I am looking for a way to redirect the stdout of the background jobs to dev/null immediately after finding the successful start entry in the log.



Thanks in advance,

Alvin
 

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LEARN ABOUT DEBIAN

storebackupmount

STOREBACKUPMOUNT(1)					User Contributed Perl Documentation				       STOREBACKUPMOUNT(1)

NAME

       storeBackupMount.pl - runs storeBackup backing up to an nfs mount

SYNOPSIS

	       storeBackupMount.pl -c configFile [-s server] [-l logFile] [-d]
	       [-p pathToStoreBackup] [-k killTime] [-m] mountPoints...

DESCRIPTION

       This script does the following:

       - checks an nfs server with ping
       - mounts that server via a list of mount points
       - starts storeBackup (with a config file)
       - umounts that server

OPTIONS

       --server, -s
		   name or ip address of the nfs server
		   default is localhost

       --configFile, -c
		   configuration file for storeBackup.
		   if option 'logFile' is set in the configration file,
		   that log file is read online, if it is different from -l

       --logFile, -l
		   logFile for this process.
		   default is STDOUT.
		   you can log into the same logfile as storeBackup

       --debug, -d
		   generate some debug messages

       --pathStbu, -p
		   path to storeBackup.pl

       --killTime -k
		   time until storeBackup.pl will be killed.
		   default is 365 days.
		   the time range has to be specified in format 'dhms', e.g.
		   10d4h means 10 days and 4 hours

       --keepExistingMounts, -m
		   if a mount already exists, do not umount after
		   running storeBackup

       mountPoints
		   List of mount points needed to perform the backup.
		   This must be a list of paths which have to be
		   defined in /etc/fstab.
		   -
		   if you add 'ro,' or 'rw,' to the beginning of a mount
		   point, you can overwrite that option set in /etc/fstab

		   example:
		   ro,/filesSystemToRead
		      will mount /fileSystemToRead read only, even if the
		      corresponding entry in /etc/fstab mounts it read write

		   only root is allowed to use this feature!

EXIT STATUS

       0 -> everything is ok
       1 -> error from storeBackup
       2 -> error from storeBackupMount
       3 -> error from both programs

COPYRIGHT

       Copyright (c) 2004-2008,2012 by Heinz-Josef Claes (see README).	Published under the GNU General Public License v3 or any later version

perl v5.14.2							    2012-03-03						       STOREBACKUPMOUNT(1)
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