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using if statement to check file size


 
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# 1  
Old 10-08-2009
using if statement to check file size

Hi,

Am trying to execute certain commands if the condition satisfied, but i feel i am making some mistakes in the usage of if statement

here is the code
Code:
#!/bin/ksh
SIZE=$(ls -ltr /aemu/ws/DN.txt  | tr -s ' ' | cut -d ' ' -f 5)
filename=`TZ=CST+24 date +%Y%m%d`
ZERO=0

if [$SIZE=$ZERO ] 
then
cp /aemu/ws/DN.txt /aemu/ws/backup/dn/$filename
echo $SIZE
fi
exit

am getting the error as

Quote:
# ./checksizeANDmove
./checksizeANDmove[6]: [0=0: not found
#
Aemunathan
# 2  
Old 10-08-2009
Hi,

If you want to check the file size is zero or non zero , use the below code

Code:
[ -s filename ] && echo "Size" || echo "Zero Size"

# 3  
Old 10-08-2009
Hi

How can i use it in IF statement ?
# 4  
Old 10-08-2009
Quote:
Originally Posted by aemunathan
Hi

How can i use it in IF statement ?

Code:
if [ -e $FILE ] && [ ! -s $FILE ]

(Reference)
# 5  
Old 10-08-2009
In your original code the problem is that you need a space between the first square bracket and variable name. Also the = is to assign not compare. Try

Code:
if [ $SIZE -eq $ZERO ]

# 6  
Old 10-08-2009
Hi

Thanks...got it working....

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