[SOLVED] Find a substring/member in a string/array using bash

someshpr · 10-13-2010, 02:23 PM

This may be a basic bash array/string operation related question, but I couldn't find any direct answer. So here it goes:

I have a lot of data sorted in various directories. All directories need same processing except for a special group of directories. I have a symbolic link of the script in discussion in each directory. I want the script to get the name of the current directory, check if that belongs to special group and do specific operations.

So I get the name of the directory

Code:

mm=`basename \`pwd\``

Now the the group of directories that needs something different to be done, contains these directories:

Code:

user member default  MIT qly ...

I was thinking if something like this is possible:

Code:

GRPS=(user member default  MIT qly ...)
if [[ $mm is a member of $GRPS array ]]; then
 echo "Special"
fi

So essentially I am looking for an operator/function that searches for a substring/member in a string/array and returns some indication of success or failure.

TIA,

catkin · 10-13-2010, 02:42 PM

If I have understood correctly that the directories you want to treat differently are identified by containing a specific set of subdirectories, say user, member, default, MIT and qly then how about

Code:

if [[ -d user && -d member && -d default && -d MIT && -d qly]]; then
    <whatever you want to do in the special directories>
else
    <whatever you want to do in the other directories>
fi

someshpr · 10-13-2010, 02:57 PM

Quote:

Originally Posted by catkin

If I have understood correctly that the directories you want to treat differently are identified by containing a specific set of subdirectories, say user, member, default, MIT and qly then how about

Code:

if [[ -d user && -d member && -d default && -d MIT && -d qly]]; then
    <whatever you want to do in the special directories>
else
    <whatever you want to do in the other directories>
fi

Yes I can do that. In fact I have bypassed this issue earlier by doing that. But now I have a large number of special directories. So I was thinking if I could make the if statement less cumbersome and make it more modular (sort of).

someshpr · 10-13-2010, 04:58 PM

I found a way to do that (hint):

Code:

if [[ "${GRPS}" == *${mm}* ]]; then
    <whatever I want to do in the special directories>
else
    <whatever I want to do in the other directories>
fi

This works now.

grail · 10-14-2010, 02:17 AM

Well you could do away with the asterixes:

Code:

if [[ "${GRPS}" =~ ${mm} ]]; then