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Full Discussion: File growth monitoring
Special Forums Hardware Filesystems, Disks and Memory File growth monitoring Post 302073922 by hegemaro on Thursday 18th of May 2006 02:32:44 PM
Old 05-18-2006
Using a simple pipeline you can get the current size of a file. Wrapping that in a script and setting a threshold would allow you to trap a file size. The following examples were executed in ksh on a Solaris 8 system but should be sufficiently generic:

Code:
$ ls -l /var/log/syslog 
-rw-r--r--   1 root     root        4109 May 18 07:30 /var/log/syslog
$ ls -l /var/log/syslog | tr -s " " "\t" | cut -f5
4109

Save that as a variable and compare:
Code:
FILESIZE=$(ls -l /var/log/syslog | tr -s " " "\t" | cut -f5)

if [ $FILESIZE -lt 10000 ]
then
    :   # no action required
else
    echo "$FILESIZE" | mailx -s "file limit reached" root
fi

And as my grandmother always said, "season to your taste." I hope this helps.
Last edited by hegemaro; 05-20-2006 at 08:36 AM..
 

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LEARN ABOUT LINUX

tailf

TAILF(1)						     Linux Programmer's Manual							  TAILF(1)

NAME

       tailf - follow the growth of a log file

SYNOPSIS

       tailf [OPTION] file

DESCRIPTION

       tailf will print out the last 10 lines of a file and then wait for the file to grow.  It is similar to tail -f but does not access the file
       when it is not growing.	This has the side effect of not updating the access time for the file, so a filesystem flush does not occur  peri-
       odically when no log activity is happening.

       tailf is extremely useful for monitoring log files on a laptop when logging is infrequent and the user desires that the hard disk spin down
       to conserve battery life.

       Mandatory arguments to long options are mandatory for short options too.

       -n, --lines=N, -N
	      output the last N lines, instead of the last 10.

AUTHOR

       This program was originally written by Rik Faith (faith@acm.org) and may be freely distributed under the  terms	of  the  X11/MIT  License.
       There is ABSOLUTELY NO WARRANTY for this program.

       The latest inotify based implementation was written by Karel Zak (kzak@redhat.com).

SEE ALSO

       tail(1), less(1)

AVAILABILITY

       The tailf command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

								 13 February 2003							  TAILF(1)
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