This is a script that will output lyrics from the song “What is Love?” when a user enters
$ whatis love
Of course, there are many other ways to make this happen, and most of them are probably better than my way :D The edit I made to the regular source for the command is in bold italics.
Here’s the code:
#!/bin/sh
program=`basename $0`
# When man pages in your favorite locale look to grep like binary files
# (and you use GNU grep) you may want to add the ‘a’ option to *grepopt1.
aproposgrepopt1=’ai’
aproposgrepopt2=”
whatisgrepopt1=’aiw’
whatisgrepopt2=’^’
grepopt1=$whatisgrepopt1
grepopt2=$whatisgrepopt2
if [ $# = 0 ]
then
echo “usage: $program keyword …”
exit 1
fi
manpath=`man —path | tr : ‘\040’`
if [ “$manpath” = “” ]
then
echo “$program: manpath is null”
exit 1
fi
args=
for arg in $*; do
case $arg in
—version|-V|-v)
echo “$program from man-1.6f”
exit 0
;;
—help|-h)
echo “usage: $program keyword …”
exit 0
;;
-*)
echo “$program: $arg: unknown option”
exit 1
;;
*)
args=”$args $arg”
esac
done
if [ “$1” = “love” ]
then
echo “baby don’t hurt me”
echo “don’t hurt me”
echo “no more”
exit
fi
while [ “$1” != “” ]
do
found=0
for d in /var/cache/man $manpath /usr/lib
do
if [ -f $d/whatis ]
then
if grep -“$grepopt1” “$grepopt2”“$1” $d/whatis
then
found=1
# Some people are satisfied with a single occurrence
# But it is better to give all
# break
fi
fi
done
if [ $found = 0 ]
then
echo “whatis $1: nothing appropriate”
fi
shift
done
exit
