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Groups > comp.unix.shell > #21461

finding directories based on files within?

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I currently have a simple shell script along the lines of:

	find "$1" -type d \
		-exec test -f {}/SENTINEL-1 \; \
		-exec test -f {}/SENTINEL-2 \; \
		-print

The idea is to list directories that satisfy the condition of having two
exactly named files within them. This code works, but it's not exactly
fast (two execs for each matched directory), and it doesn't scale well:
three files or has one but NOT the other, has either one of them, has
sub-directories of particular names etc, all require rewriting the whole
command. The way I use this tool, it needs to examine both immediate
subdirectories of "$1" and one level further.

Before I write myself a custom tool, is there a better way of doing this
sort of thing? In my case, the directories are all small, with a median
of under ten items, so spped of readdir() versus stat() isn't a big
concern (and I'd be comparing the speed to find).

I already have a Perl script that might be a candidate for replacement
if there is a better way. That script does not need to recurse, so it
doesn't use find (or the Perl equivilent module). It takes a list of
directories and prints the ones that only have files matching a couple of
globs, specifically (case insenitive) *.txt and *.html. Any directory
that has a .jpg or other non-txt, non-html suffix, an or a file with no
suffix, is not printed.

For those wondering, the commonality is both of these uses are for
automatic clean-up of directories created by other programs. Directories
that match are safe to delete without further inspection (subject to
race conditions).

Elijah
------
has this set of data been processed? and backed up?

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Thread

finding directories based on files within? Eli the Bearded <*@eli.users.panix.com> - 2021-05-10 22:13 +0000
  Re: finding directories based on files within? Spiros Bousbouras <spibou@gmail.com> - 2021-05-13 02:38 +0000
  Re: finding directories based on files within? Martijn Dekker <martijn@inlv.demon.nl> - 2021-05-13 04:50 +0200
  Re: finding directories based on files within? Ed Morton <mortonspam@gmail.com> - 2021-05-13 07:20 -0500
    Re: finding directories based on files within? Ed Morton <mortonspam@gmail.com> - 2021-05-13 09:04 -0500
  Re: finding directories based on files within? Axel Reichert <mail@axel-reichert.de> - 2021-05-13 14:56 +0200
    Re: finding directories based on files within? Ed Morton <mortonspam@gmail.com> - 2021-05-13 08:44 -0500
      Re: finding directories based on files within? Axel Reichert <mail@axel-reichert.de> - 2021-05-13 21:09 +0200
  Re: finding directories based on files within? merlyn@stonehenge.com (Randal L. Schwartz) - 2021-05-13 07:31 -0700
    Re: finding directories based on files within? Eli the Bearded <*@eli.users.panix.com> - 2021-05-13 17:11 +0000
    Re: finding directories based on files within? Christian Weisgerber <naddy@mips.inka.de> - 2021-05-13 22:04 +0000
      Re: finding directories based on files within? merlyn@stonehenge.com (Randal L. Schwartz) - 2021-05-15 06:45 -0700
      find2perl (Was: finding directories based on files within?) gazelle@shell.xmission.com (Kenny McCormack) - 2021-05-15 17:32 +0000
        Re: find2perl Dan Espen <dan1espen@gmail.com> - 2021-05-15 13:46 -0400
        Re: find2perl (Was: finding directories based on files within?) Christian Weisgerber <naddy@mips.inka.de> - 2021-05-15 20:17 +0000
          Re: find2perl (Was: finding directories based on files within?) gazelle@shell.xmission.com (Kenny McCormack) - 2021-05-16 13:06 +0000
        Re: find2perl merlyn@stonehenge.com (Randal L. Schwartz) - 2021-05-15 15:34 -0700

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