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Language GNU Find
| Date: | 04/20/05 |
| Author: | Peter Maydell |
| URL: | n/a |
| Comments: | 0 |
| Info: | n/a |
| Score: |  (2.91 in 113 votes) |
# By Peter Maydell: http://www.chiark.greenend.org.uk/~pmaydell/find/beerhack
#!/bin/sh
#
# 99 Bottles Of Beer - find(1) version (with a little help from its
# friends: mkdir, cd, sh, expr, ls, echo and rm)
# Copyright (C) Peter Maydell <pmaydell@chiark.greenend.org.uk>
#
# This shell script is just a wrapper to tidy up after the find
# command which does all the real work...
#
# You might want to change the 99 to 10 to get less output :->
mkdir /tmp/beer || exit 1
cd /tmp/beer
find . -noleaf \
-path . \
-exec mkdir 99 \; \
-o -name 1 \
-printf '1 bottle of beer on the wall, 1 bottle of beer\nTake' \
-printf 'one down and pass it around\nNo bottles of beer!\n' \
-o \
-exec sh -c "mkdir {}/\`expr {} : '.*/\(.*\)' - 1\`" \; \
-printf '%f bottles of beer on the wall, %f bottles of beer\n' \
-printf 'Take one down and pass it around, ' \
-exec sh -c "echo -n \`ls {}\`" \; \
-printf ' bottle' \
-name 2 \
-printf ' of beer\n' \
-o \
-printf 's of beer\n'
cd /tmp
rm -rf /tmp/beer
# You will need the following programs. I have listed which versions
# I have, and that combination has been tested. Others might work...
# mkdir : any old mkdir should do; mine is from GNU fileutils 3.16
# cd : only used in the pre and post-party stuff, any old cd will do
# find : I used GNU find version 4.1; if your find doesn't have the
# -noleaf option then it probably doesn't have the optimisation
# that flag disables; try just omitting it
# sh : I used bash version 2.01.1(1)-release, but have tried not
# to use bash-isms. Must be a Bourne-like shell, though.
# expr : expr from GNU shellutils 1.16
# ls : ls from GNU fileutils 3.16; any will do provided that
# 'ls directory' for a dir. with a single subdirectory and nothing
# else in it prints only the subdir name.
# echo : I used the bash builtin. You need an echo that understands the
# -n flag (meaning, don't print trailing newline). Actually, this is
# just so the output looks nice, and you can omit the -n.
# rm : from GNU fileutils 3.16; any should do, and it's only used
# to tidy up a bit.
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