Language GNU Find
Date: | 04/20/05 |
Author: | Peter Maydell |
URL: | n/a |
Comments: | 0 |
Info: | n/a |
Score: | (2.94 in 116 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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