Delete directory conditioned

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# 1  
Delete directory conditioned

Hi, I am trying to make a script that finds if inside a folder there are more than 2 subfolders; if so, I want to erase the older subfolder.

I thought this would be useful:
find /sdcard/backup -mtime +1 -exec rm-r {} /;

But it only erases subfolders older than one day, and I would want that subfolders get erased if there are more than two, even if none of them is older than one day.

How could I modify the command?

Thanks for your help.

Edit: Sorry, didn't use code tags

Moderator's Comments:
Mod Comment Please use next time code tags for your code and data

Last edited by Hammerhand; 04-17-2012 at 06:23 AM..
# 2  
Any specifications on what criteria to pick those 2 sub directories? Top level I guess and age? Name?.. ?
# 3  
I would want to erase the oldest, doesn't mean the name.
# 4  
Assuming all directories are on the same level and you are using Linux or a Linux like OS, you can try this:

$ for a in /sdcard/backup/*; do stat --format="%n %y" $a; done
/sdcard/backup/a 2012-04-17 18:00:00.000000000 +0200
/sdcard/backup/b 2012-04-17 01:00:00.000000000 +0200
/sdcard/backup/c 2012-04-17 11:00:00.000000000 +0200
/sdcard/backup/d 2012-04-17 23:00:00.000000000 +0200

# for a in /sdcard/backup/*; do stat --format="%n %y" $a; done| sort -t" " -k2rn -k3rn -k4rn
/sdcard/backup/d 2012-04-17 23:00:00.000000000 +0200
/sdcard/backup/a 2012-04-17 18:00:00.000000000 +0200
/sdcard/backup/c 2012-04-17 11:00:00.000000000 +0200
/sdcard/backup/b 2012-04-17 01:00:00.000000000 +0200

Sorted content but the latest, dir "d":
for a in /sdcard/backup/*; do stat --format="%n %y" $a; done| sort -t" " -k2rn -k3rn -k4rn| awk 'NR>1 {print $1}'

Finally deleting those 3:
# for a in /sdcard/backup/*; do stat --format="%n %y" $a; done| sort -t" " -k2rn -k3rn -k4rn| awk 'NR>1 {system("rm -r "$1)}'

Trying the steps you can dry-run before deleting too much.
This User Gave Thanks to zaxxon For This Post:
# 5  
Wow, it's more complex that I thought. I will give a try. Thanks.
# 6  
No, you are right, sorry. I was drifting away while testing out and thought about having additional levels etc.Smilie not seeing the wood for the trees...
Didn't think about much easier ls -t which does it all for us:
cd /sdcard/backup; ls -t1 | awk 'NR>1 {system("rm -r "$1)}'

Keep in mind that both solutions are looking for files in that directory, not only directories. So with rm -r you will get an error when encountering non-directory files.

Last edited by zaxxon; 04-17-2012 at 10:02 AM..
This User Gave Thanks to zaxxon For This Post:
# 7  
Smilie Happens to many of us... Smilie
This User Gave Thanks to vbe For This Post:

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