I am working on a script that needs to perform an action in every sub-directory of a specific folder.
What is the most efficient way to write that?
A version that avoids creating a sub-process:
for D in *; do
if [ -d "${D}" ]; then
echo "${D}" # your processing here
fi
done
Or, if your action is a single command, this is more concise:
for D in *; do [ -d "${D}" ] && my_command; done
Or an even more concise version (thanks @enzotib). Note that in this version each value of D
will have a trailing slash:
for D in */; do my_command; done