Bash Script - iterating over output of find
I have a bash script in which I need to iterate over each line of the ouput of the find command, but it appears that I am iterating over each Word (space delimited) from the find command. My script looks like this so far:
folders=`find -maxdepth 1 -type d`
for $i in $folders
do
echo $i
done
I would expect this to give output like:
./dir1 and foo
./dir2 and bar
./dir3 and baz
But I am insted getting output like this:
./dir1
and
foo
./dir2
and
bar
./dir3
and
baz
What am I doing wrong here?
Solution 1:
folders=`foo`
is always wrong, because it assumes that your directories won't contain spaces, newlines (yes, they're valid!), glob characters, etc. One robust approach (which requires the GNU extension -print0
) follows:
while IFS='' read -r -d '' filename; do
: # something with "$filename"
done < <(find . -maxdepth 1 -type d -print0)
Another safe and robust approach is to have find
itself directly invoke your desired command:
find . -maxdepth 1 -type d -exec printf '%s\n' '{}' +
See the UsingFind wiki page for a complete treatment of the subject.
Solution 2:
Since you aren't using any of the more advanced features of find
, you can use a simple pattern to iterate over the subdirectories:
for i in ./*/; do
echo "$i"
done
Solution 3:
You can do something like this:
find -maxdepth 1 -type d | while read -r i
do
echo "$i"
done