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Old 02-01-2009, 05:04 AM   #1
jasper25
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Registered: Feb 2009
Posts: 1

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find a string within another with bash script


Hello,

I would like to search for the existence of a string within another. I would like to check if a particular string is within a filename:

#!/bin/sh
search=123
for file in *.gz;
do
case $search in
$file) echo "Already renamed!";;

*)
name="$search""_""$file";
echo mv "$file" "$name";;

esac
done

This script does only work if the search matches the filename exactly
does anyone know how I can search for a part of the filename?

Thanx,
Jasper
 
Old 02-01-2009, 05:32 AM   #2
dorian33
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Registered: Jan 2003
Location: Poland, Warsaw
Distribution: LFS, Gentoo
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http://tldp.org/LDP/abs/html/refcards.html#AEN21400 may help.
 
Old 02-01-2009, 08:06 AM   #3
pcunix
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Registered: Dec 2004
Location: MA
Distribution: Various
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Quote:
Originally Posted by dorian33 View Post
That's probably the better answer because it will teach him more about Bash pattern matching, but for the specific case:

#!/bin/sh
search=123
for file in *$search*;
do
echo $file matches
done

teaches him something else he should learn (and notice what happens when "search" doesn't match at all).
 
Old 02-01-2009, 08:08 AM   #4
pixellany
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Registered: Nov 2005
Location: Annapolis, MD
Distribution: Arch/XFCE
Posts: 17,802

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You want something like grep.

Example (not tested):

Code:
for file in *.gz;
do
echo $(grep $search $file)
done
Get comfortable with how this works, then add other constructs until you get what you want.
 
  


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