very small bash script question

[Richard Sharman <rsharman@magmacom.com>]

Lawrence Chim writes:
 > Does anyone know how to check a directory is empty
 > in bash script?
 > 
 > lawrence,
 > 

This seems to work for me.   

-----------------------  dir_is_empty -------------------
#! /bin/bash


# syntax dir_is_empty [optional_directory]
# return 0 if it is empty
#        1 if it isn't empty (but is a directory)
#        2 if parameter is not a directory (error)
#	   or too many args given (error)

# Thee 2 varriables must be set for bash to expand the way
# we want it to.   See man bash(1).
glob_dot_filenames=1
allow_null_glob_expansion=1

DIR="."
case $# in
	0 )	DIR="." ;;
	1 ) 	DIR=$1
		if [ ! -d $DIR ] ; then
			echo >&1 $DIR is not a directory
			exit 2
		fi ;;
	* )	echo >&1 "syntax is $0 [optional directory]"
		exit 2 ;;
esac

X="`(cd $DIR ; echo *)`" 

if [ "$X" = ". .." ] ; then
	exit 0
else
	exit 1
fi
------------------------------------------------------------------------

			Testing it.


ls -al Empty Non1 Non2
Empty:
total 3
drwxr-xr-x   2 rs       rs           1024 Mar  8 16:56 .
drwxr-xr-x  11 rs       rs           2048 Mar  8 17:26 ..

Non1:
total 4
drwxr-xr-x   2 rs       rs           1024 Mar  8 16:56 .
drwxr-xr-x  11 rs       rs           2048 Mar  8 17:26 ..
-rw-r--r--   1 rs       rs             29 Mar  8 16:56 date

Non2:
total 4
drwxr-xr-x   2 rs       rs           1024 Mar  8 16:56 .
drwxr-xr-x  11 rs       rs           2048 Mar  8 17:26 ..
-rw-r--r--   1 rs       rs             29 Mar  8 16:56 .date
./dir_is_empty Empty/ ; echo $?
0
./dir_is_empty Non1/ ; echo $?
1
./dir_is_empty Non2/ ; echo $?
1
./dir_is_empty  ; echo $?
1
./dir_is_empty  dir_is_emptry  ; echo $?
dir_is_emptry is not a directory
2
bash%