[Solved] recurse directories with bash

[bitrat]

Hi,

I want to walk a largish directory tree and call the same bash script for each, with parent environment (directory) passed via stdargs, without creating a fork bomb.

I was just wondering if there's an idiom or prior art for this?

My first cut:

Code: Select all

$ cat ./brd.sh
#!/bin/bash

find "$1" -mindepth 1 -maxdepth 1 -type d | while read d ; do

       echo "$d"

       ./brd.sh "$d"

done

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mkdir -p a/b/c/d/1/2/3
mkdir -p a/b/c/4/5/6

$ ./brd.sh .
./a
./a/b
./a/b/c
./a/b/c/d
./a/b/c/d/1
./a/b/c/d/1/2
./a/b/c/d/1/2/3
./a/b/c/4
./a/b/c/4/5
./a/b/c/4/5/6

I'd be interested to hear about any caveats, before I release it to the wild.

Cheers,
bitrat

[LinuxOS]

find has -exec and -execdir, try something like

Code: Select all

find "$1" -mindepth 1 -maxdepth 1 -type d -exec ./brd.sh '{}' \;

[Aki]

Moved to “Programming” sub-forum

[steve_v]

One can almost certainly do this entirely in bash, using the '*/' directory glob, a test for sanity, and some string manipulation (or dirname) to get the parent, without forking any find processes.
Personally I'd be inclined to drop the calling another script bit (and by extension the mentioned risk of fork bombs) too, and just put whatever it's supposed to do inside the main loop. Hard to say how well that'll work without knowing your final intent though.

[bitrat]

Thanks, all good! I found find -exec find .. a good approach. I also made some intermediate files of directory listings, as I wanted to filter them.

Cheers,
bitrat