Re: [TCLUG:21204] Question on Bourne shell script.

[Adam Maloney <adamm@sihope.com>]

You have two files, one is the list of all files and the other is a list
of files to exclude?

all_files is the 1st, exclude is the second:

for a in `cat exclude`
do
  grep -v "$a" all_files > temp.$$
  cp temp.$$ all_files
done

That's off the top of my head.  There's a much easier way to do this but
it eludes me right now (actually there are tons of ways to do this, the
beauty of bash!).

Test this first, I just pulled it straight out of thin air and haven't
checked it.

Adam Maloney
Systems Administrator
Sihope Communications

On Mon, 11 Sep 2000, Mike Glaser wrote:

> I am working on a shell script to run a tape backup for one of my servers and I 
> have a small problem.
> 
> Since I am using cpio, I first generate list of all files on the server with the find 
> command. Then I want to go back and remove any directories that meet a 
> certain pattern (like ' ^ \ /proc \ / ' ) that is included in another 'exclude' file. I 
> thought of one way to do that using 'grep -v .... > somefile.txt'
> 
> My problem is, how do I read in the list of excluded directories from a file and 
> pass that to grep? I guess I don't understand redirection and shell 
> programming enough to solve my problem. I could figure out a solution with 
> Perl, but I must write te code in a bash script.
> 
> This is what I have now, but it doesn't work...
> grep -v file.txt < cat exclude_list.txt > new_shorter_file.txt
> 
> If anyone could help me out I would appreciate it!
> Thank-you,
> Mike Glaser
> 
> 
> 
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