[Gllug] Finding files in directories recursively

[Matt Blissett]

Jon Dye wrote:

> Hi,
> 
> I want to run a program (mp3gain) passing it all the files in a
> particular directory.  I then want to do this recursively, e.g.

If you can, using zsh makes this reasonably simple:

$ mkdir -p dir1 dir2 dir3/dir4
$ touch dir{1,2}/file{1,2,3} dir3/dir4/file{1,2,3}

$ for d in **/*(/); echo $d/*
dir1/file1 dir1/file2 dir1/file3
dir2/file1 dir2/file2 dir2/file3
dir3/dir4
dir3/dir4/file1 dir3/dir4/file2 dir3/dir4/file3

That might not be a problem, but if it is:

$ setopt nullglob
$ for d in **/*(/); f=( $d/*(.) ) && [[ $#f != 0 ]] && echo $f
dir1/file1 dir1/file2 dir1/file3
dir2/file1 dir2/file2 dir2/file3
dir3/dir4/file1 dir3/dir4/file2 dir3/dir4/file3

The ** glob thing is very useful in combination with the (). E.g.:
$ echo **/*(.)
dir1/file1 dir1/file2 dir1/file3 dir2/file1 dir2/file2 dir2/file3
dir3/dir4/file1 dir3/dir4/file2 dir3/dir4/file3
$ echo **/*(/)
dir1 dir2 dir3 dir3/dir4

**/*(om)   -- ordered by modification time
**/*(oL)   -- by size (length)

Lots more in zshexpn(1) :-)

Matt


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