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Full Discussion: Check log file size every 10 minute. Alert if log not update
Top Forums Shell Programming and Scripting Check log file size every 10 minute. Alert if log not update Post 302763669 by mstafreshi on Wednesday 30th of January 2013 10:02:24 AM
Old 01-30-2013
this is a simple script . can it help find your way ?
Code:
os=ofs #old size
logFile=logFile

# test log file exists !
test -r $logFile || { echo "can't open $logFile"; 1>&2; exit 1; }

# get current log file size !
cfs=`ls -l $logFile | awk '{print $5}'`

# test to see file that keeps old size exists !
test -r $os || { echo 'not changed' 1>&2; echo $cfs>$os; exit 1; }

# old file size is empty !
if test `ls -l $os | awk '{print $5}'` -eq 0
then
        echo 'not changed' 1>&2;
        exit 1;
fi

oldsize=`sed -n '1,1p' $os`

if test $oldsize -eq $cfs
then
        echo 'not changed' 1>&2
else
        echo 'changed' 1>&2
fi

echo $cfs >$os

certainly above code with its structure can be write better and more efficient . i wrote it very quickly with my limited skill .
 

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LEARN ABOUT PLAN9

cfs

CFS(4)							     Kernel Interfaces Manual							    CFS(4)

NAME

       cfs - cache file system

SYNOPSIS

       cfs -s [-rd] [-f partition]

       cfs -a netaddr [-rd] [-f partition] [mtpt]

DESCRIPTION

       Cfs is a user-level file server that caches information about remote files onto a local disk.  It is normally started by the kernel at boot
       time, though users may start it manually.  Cfs is interposed between the kernel and a network connection to a remote file server to improve
       the  efficiency of access across slow network connections such as modem lines.  On each open of a file cfs checks the consistency of cached
       information and discards any old information for that file.

       Cfs mounts onto mtpt (default /) after connecting to the file server.

       The options are:

       s      the connection to the remote file server is on file descriptors 0 and 1.

       a netaddr
	      dial the destination netaddr to connect to a remote file server.

       r      reformat the cache disk partition.

       d      turn on debugging

       f partition
	      use file partition as the cache disk partition.

       All 9P messages except read, clone, and walk (see intro(5)) are passed through cfs unchanged to the remote server.  A clone followed  imme-
       diately	by a walk is converted into a clwalk.  If possible, a read is satisfied by cached data.  Otherwise, the file server is queried for
       any missing data.

FILES

       /dev/hd0cache
	      Default file used for storing cached data.

SOURCE

       /sys/src/cmd/cfs

																	    CFS(4)
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