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Old 07-15-2009, 01:46 PM   #1
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How can I select all files except a group?

Hi again!

I'm very new to shell scripting, and I need a way to do the following:

I have directory (dir_new) with a list of 15 files that I have to compare (using diff) with the same files on another directory (dir_old).

Three of those files are not supposed to be compared, so I need to leave them out of the test. All files have different names, but these 3 files all start with the same initial (NCP).

I need to know how can I leave those three files out of the FOR sentence that I use to diff the rest of the files. This is what I have:

cd $dir_old
for name in *
		diff "$name" "$dir_new$name" >> logfile
I don't know what to use instead of the * on the first line, that will allow me to use all the files except the ones that start with NCP. I tried for name in !NCP* and one or two variables, but I had no luck so far.

I'd really appreciate some help!


EDIT: sorry I forgot, I'm using ksh

Last edited by fpp666; 07-15-2009 at 01:47 PM. Reason: Forgot info
Old 07-15-2009, 02:18 PM   #2
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Hello fpp666

You could skip the NCP* files by
cd $dir_old
for name in *
		if [[ "${name#NCP}" = "$name" ]]; then
			diff "$name" "$dir_new$name" >> logfile
You could also do it by altering the file name expansion * but I'm not confident of being able to advise how to do that in ksh. The above will work in any (almost any!) Bourne shell derivative.


Old 07-16-2009, 03:17 AM   #3
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Assuming that ksh also has the $(...) construct:
for name in $(ls -I 'NCP*')
Old 07-16-2009, 08:31 AM   #4
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Thank you very much, you've been really helpful!!




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