Revision: 22667
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at January 18, 2010 21:26 by tm
Initial Code
# Not sure, what this is good for - however this is asked sometimes.
# I specifically exclude "dotfiles" and only consider files of the form "foo.bar" (i.e. we
# don't consider filenames without an "inner dot" at all)
find . -type f -name '[^.]*.*' \
-exec bash -c 'printf "%s\n" ${@##*.}' _ {} + | sort -u
# (or ... | sort | uniq, in case the sort lacks -u, which is a GNUism)
# Of course it's trivial to do it non-recursively:
for f in *.*; do printf "%s\n" "${f##*.}"; done | sort -u
# or recursively again, with a bash4 associative array, including
# a count for each extension (no sorting here):
unset a; declare -A a
while IFS= read -r ext; do
((a[$ext]++))
done < <(find . -type f -name '[^.]*.*' \
-exec bash -c 'printf "%s\n" ${@##*.}' _ {} +)
for ext in "${!a[@]}"; do
printf "'%s' (%s)\n" "$ext" "${a[$ext]}"
done
# NOTE: all methods above fail, if an extension contains embedded newlines.
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Find all file extensions used under some directory (recursively)
Initial Tags
Bash, find
Initial Language
Bash