#!/bin/bash
# Copyright (c) 1999, William Stearns
# It's this simple.
# - Place randomsig in /usr/local/bin .
# - mkdir ~/sigs
# - edit ~/sigs/header  and place the top lines of the sig there.
# - edit ~/sigs/footer  and place the bottom lines there.
# - place any quotes you'd like in the rest of the files in ~/sigs.
# - place the following line (without leading #) in /var/spool/cron/the_user_name and restart cron:
#		*/10 * * * *	/usr/local/bin/randomsig /the/users/home/directory >/dev/null
# The optional command line parameter is the home directory to use.

#DEBUG="YES"
if [ -n "${1}" ]; then HOME="${1}" ; fi
SIGDIR="${HOME}/sigs"
if [ ! -d ${SIGDIR} ]; then mkdir ${SIGDIR} ; fi
if [ ! -f ${SIGDIR}/header ]; then echo Please edit ${SIGDIR}/header to place a custom header here. >${SIGDIR}/header ; fi
if [ ! -f ${SIGDIR}/footer ]; then echo Please edit ${SIGDIR}/footer to place a custom footer here. >${SIGDIR}/footer ; fi
if [ ! -f ${HOME}/.signature.prerandomsig ]; then cp -p ${HOME}/.signature ${HOME}/.signature.prerandomsig ; fi

QUOTEFILES="`ls -1F ${SIGDIR} 2>/dev/null | egrep -v '(header|footer)' | grep -v '^$' | grep -v '/$'`"

if [ "${QUOTEFILES}" = "" ]; then
	cat ${SIGDIR}/header ${SIGDIR}/footer >${HOME}/.signature
else
	NUMQUOTES=`echo "$QUOTEFILES" | wc -l`
	if [ -n "${DEBUG}" ]; then echo ${NUMQUOTES} quotes. ; fi
	QUOTENUM=$[ ${RANDOM} % ${NUMQUOTES} + 1 ]					#Between 1 and the number of quotes
	if [ -n "${DEBUG}" ]; then echo Using quote ${QUOTENUM}. ; fi
	QUOTEFILE=`echo "${QUOTEFILES}" | head -${QUOTENUM} | tail -1`	#Corresponding filename
	if [ -n "${DEBUG}" ]; then echo Using quotefile ${QUOTEFILE}. ; fi
	cat ${SIGDIR}/header ${SIGDIR}/${QUOTEFILE} ${SIGDIR}/footer >${HOME}/.signature
fi