bash check folder exists

zerocool22 · 05-27-2008, 09:03 AM

Quote:

#!/bin/bash

for i in $( ls /backup ) ; do
if [ -d /backup/$i ]; then
chown --reference=/home/$i /backup/$i
else
echo ls /backup/$i
fi
for j in $( ls /backup/$i ) ; do
if [ -d /backup/$i/$j ]; then
chown -R --reference=/home/$i/$j /backup/$i/$j

else
echo ls /backup/$i/$j
fi
done
done

here ya go

pwc101 · 05-27-2008, 09:32 AM

Quote:

Originally Posted by zerocool22

here ya go

I don't understand what you're trying to achieve.

I presume you have a series of user directories under /home and you want the permissions of the directories in /backup to match those. If that is the case, then the following might be more suitable:

Code:

for dir in /home/*; do 
   chown -R --reference=$dir /backup/$(basename $dir)
done

zerocool22 · 05-27-2008, 09:35 AM

mine works aswell? why should i go your way?

I have /home/ folders with user/group properties on them, now i need to match them to my /backup/ folders which contain the same folders, but different content.

pwc101 · 05-27-2008, 10:51 AM

Quote:

Originally Posted by zerocool22

mine works aswell? why should i go your way?

If yours works, that's fine - use that.

zerocool22 · 05-28-2008, 03:23 AM

one last question about this, cause im still having some troubles, so the home folder properties are getting copied to backup nicely. But sometimes /home/ has a folder that doesnt excist in /backup/ like for example /home/tompie but there is no /backup/tompie so the properties cant be copied to backup. So i want to list all folders that do excist on home but not on backup.

I thought i was doing that by saying if [ -d /backup/$i ]; then
else
echo ls /backup/$i

But he doesnt list any to the screen??

pwc101 · 05-28-2008, 03:56 AM

Quote:

Originally Posted by zerocool22

one last question about this, cause im still having some troubles, so the home folder properties are getting copied to backup nicely. But sometimes /home/ has a folder that doesnt excist in /backup/ like for example /home/tompie but there is no /backup/tompie so the properties cant be copied to backup. So i want to list all folders that do excist on home but not on backup.

I thought i was doing that by saying if [ -d /backup/$i ]; then
else
echo ls /backup/$i

But he doesnt list any to the screen??

All that snippet of code says is, if /backup/$i is a directory, then chown it, otherwise, list its contents. It doesn't check to see if it's present in /home too. To do that, you might do something like:

Code:

for dir in $(ls /home/); do
   if [[ -d /home/$dir && -d /backup/$dir ]]; then
      do whatever you want
   else
      echo some error message
   fi
done

That will check to see if a directory exists in both /home and /backup, and if so, then you can run whatever command you want on both the files. If it only exists in one (either /home or /backup), then you can print out some error message.

Hope this helps.

maooah · 06-01-2008, 02:16 AM

hi experts

why do we start scripts the first line beginning with below statement:

#!/bin/bash

waiting for reply

Regards

pwc101 · 06-01-2008, 07:53 AM

Quote:

Originally Posted by maooah

hi experts

why do we start scripts the first line beginning with below statement:

#!/bin/bash

waiting for reply

Regards

http://en.wikipedia.org/wiki/Shebang_(Unix)

You would have probably been better off starting a new thread for this question as it really isn't that related to the rest of this thread.