cmp file


 
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Operating Systems Solaris cmp file
# 1  
Old 12-02-2009
cmp file

Dear all,

Code:
for i in <List of Filename>
     FILENAME=`echo $i`
do
     cp -p     $FILENAME   /temp
     /bin/cmp $FILENAME   /temp/$FILENAME
done

I am planning to do something like this on a daily basis, so i want to ask that, if the comparison on the files encounter error,
Code:
        STATUS="$?"
        if [ "$STATUS" != 0 ]; then
           cp -p     $FILENAME   /temp
        fi

is it wise for me to rerun the cp statement? Or i should approach it another way?

Last edited by pludi; 12-02-2009 at 06:54 AM.. Reason: code tags, please...
# 2  
Old 12-02-2009
cmp does return 0 when files match, if that is what you are asking.

if cp fails for some reason it also will return non-zero status, and in general, when you get an error copying files, it is time for human intervention, not a retry of the cp command. cp failure includes disk full errors, media errors, write system call failed for a variety of reasons. All of these need more help than just retrying a cp.

So: check the return status of cp, then on error barf noisily and exit. Don't worry with cmp unless you have a really ancient system.
# 3  
Old 12-02-2009
Thanks.
Is it correct if i code as below,
cp -p $FILENAME /temp 2> $ERRFILE

if [ "$STATUS" != 0 ]; then
[mail] `cat $ERRFILE`
fi
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