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Check File Size For Log Rotation

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# 1  
Old 04-28-2010
Check File Size For Log Rotation
Hi Can anyone assist me, I am trying to compate the size of a logfile to a maximum size 1000 and delete if exceeds the limit.
The problem I am getting is the command not found for the line
Code:
if ( $LOGNAME_SIZE >= $MAXSIZE); then

Appreciate your response.


Script:
Code:
LOGDIR="/home/
LOGNAME="log.txt"

MAXSIZE="10000"
cd $LOGDIR

LOGNAME_SIZE=$(ls -l $LOGNAME | tr -s " " | cut -d" " -f5)
if ( $LOGNAME_SIZE >= $MAXSIZE); then
echo "$LOGNAME exceeds max threshold"
rm $LOGNAME
else
echo "$LOGNAME is below max threshold"

Last edited by Scott; 04-29-2010 at 03:15 PM.. Reason: Code tags, please...
# 2  
Old 04-28-2010
What shell are you using?
# 3  
Old 04-28-2010
Quote:
Originally Posted by sureshcisco
The problem I am getting is the command not found for the line
if ( $LOGNAME_SIZE >= $MAXSIZE); then
Adjust it to:
Code:
if [ $LOGNAME_SIZE -ge $MAXSIZE ]; then

Besides you could optimize the following line:
Code:
LOGNAME_SIZE=$(ls -l $LOGNAME | tr -s " " | cut -d" " -f5)

to
Code:
LOGNAME_SIZE=$(ls -l $LOGNAME | awk '{print $5}')

# 4  
Old 04-29-2010
Updated the command - I see no difference. It's the same error. Indeed the file size exceed the MAXSIZE and I get the wrong output.

Code:
#!/bin/sh
LOGDIR="/home/"
LOGNAME="log.txt"
MAXSIZE="10000"

cd $LOGDIR

LOGNAME_SIZE=$(ls -l $LOGNAME | awk '{print $5}')

echo $LOGNAME_SIZE

if ($LOGNAME_SIZE >= $MAXSIZE);
then
echo "$LOGNAME exceeds max threshold"
rm $LOGNAME
else
echo "$LOGNAME is below max threshold"
fi

[root@server ~]# ./simple.sh
131072
./simple.sh: line 12: 131072: command not found
log.txt is below max threshold
[root@server ~]#

Last edited by Scott; 04-29-2010 at 03:16 PM.. Reason: Code tags, PLEASE!
# 5  
Old 04-29-2010
Code:
if ((LOGNAME_SIZE >= MAXSIZE));

maybe?
Quote:
Originally Posted by man sh
Arithmetic Expansion
Arithmetic expansion provides a mechanism for evaluating an arithmetic expression and substituting its value. The format for arithmetic expansion is as follows:

$((expression))
# 6  
Old 04-29-2010
Quote:
Originally Posted by sureshcisco
Updated the command - I see no difference.
Of course you need to change your if statement line too as I suggested.
# 7  
Old 04-29-2010
Thanks you very much Pseudocoder and Tukuyomi....it works!!!.
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