Printing out names of only directories and not files (BASH)

Question

I have most of what I need so far I'm just unsure of the grep command to get only directories or if there isn't one. For context, this is the original request:

This script should take a single command line argument which will be a path to a directory. (done) The script should make sure that the path is, in fact, a directory and that the user had read permission on it. (done) Your program should then capture the output of an ls command on the directory. (done) It should then print out the names of only the sub-directories that are found. Files should be ignored. (???)

I have so far:

#!/bin/bash

if [ -d $1 ] && [ -r $1 ] ; then 
  ls -l $1 | tee output | grep  ______
fi

Answer 1

The -p option for ls will probably be useful. See man ls.

Answer 2

do a grep

ls -l | grep '^d'

or just use find

find $1 -type d

Answer 3

ls -l . | awk '/^d/{printf "%s ",$8}'

Although the argument$8 depends on output of ls -l at your machine

Answer 4

find $1 -maxdepth 1 -type d

also works well. If the awk example above counts, you might as well include perl:

grep -d, glob("$path/*")

... will get you a list of directories when called in an array context.

Answer 5

ls is "eyes-only"

See: Parsing ls

find is the correct command to use. See Andy Ross's answer.

Answer 6

You probably don't need the -d or -r checks:

shopt -s failglob
echo "$1"/*/.

Replace echo with the thing you really want to do (your original question doesn't say).