script error

ust · 09-09-2008, 06:21 AM

I have below script

chka =$( cksum /tmp/file1 )
chkb =$( cksum /tmp/file2 )
echo $chka
echo $chkb

I would like to echo the cksum , but after run it , it pop the below message , can advise what is wrong ( if run it on shell , it is OK ) ? thx

cksum: /tmp/: Is a directory

antegallya · 09-09-2008, 06:59 AM

Hi,

Is that exactly your script ?
And if you add the line

Code:

if [ -f /tmp/file1 ]; then echo "OK"; else echo "KO"; fi

does the file is accessible within the script ?

billymayday · 09-09-2008, 07:04 AM

Lose the space before the "="

ust · 09-09-2008, 08:24 AM

Quote:

Originally Posted by billymayday

Lose the space before the "="

thx ,

you are right,

I have one more question , I use the cksum to check the file as below script

chka =$( cksum /tmp/file1 )
chkb =$( cksum /tmp/file2 )
echo $chka
echo $chkb

if [[ $chka != $chkb ]]
then
echo "error"
done
eles
do ...
done
fi

but I found that it must have error because when use cksum /tmp/file1 , the output is "12151458452 76276 /tmp/file1" and cksum /tmp/file2 , the output is "12151458452 76276 /tmp/file2" , the file name is different , so they must different and echo "error" , can advise how to only use cksum to show the byte of file so that I can only compare the size ? thx

antegallya · 09-09-2008, 08:34 AM

If you just want the file size, you can use
wc -c /tmp/file1
but I think you want to compare the checksum plus the size so just do a
cksum /tmp/file | grep -o "^[0-9]* [0-9]*"

ust · 09-09-2008, 08:45 AM

Quote:

Originally Posted by antegallya

If you just want the file size, you can use
wc -c /tmp/file1
but I think you want to compare the checksum plus the size so just do a
cksum /tmp/file | grep -o "^[0-9]* [0-9]*"

thx,

it is good , but if the some file name begins numeric , what can i do ? thx

billymayday · 09-09-2008, 03:31 PM

Code:

cksum /tmp/file1 | cut -d ' ' -f1,2