example02.06

UNIX[1].shell范例精解(第4版)_code

#!/bin/ksh 
# The Party Program--Invitations to friends from the "guest" file 
#guestfile=~/shell/guests
guestfile=./guests
if [[ ! -a "$guestfile" ]] 
then
	print "${guestfile##*/} non-existent"
	exit 1
fi
export PLACE="Sarotini's"
(( Time=$(date +%H) + 1 ))
set -A foods cheese crackers shrimp drinks "hot dogs" sandwiches 
typeset -i n=0
for person in $(< $guestfile) 
do
	if  [[ $person = root ]]
	then
		continue
	else 
		# Start of here document
		mail -v -s "Party" $person <<- FINIS 
		Hi ${person}! Please join me at $PLACE for a party! 
		Meet me at $Time o'clock.
		I'll bring the ice cream. Would you please bring 
		${foods[$n]} and anything else you would like to eat? Let
		me know if you can 					make it.
		       Hope to see you soon.
		                Your pal,
		                ellie@`hostname`
		FINIS
		n=n+1
	
		if (( ${#foods[*]} == $n )) 
		then
		   set -A foods cheese crackers shrimp drinks "hot dogs"
		   sandwiches
		fi
	 fi
done
print "Bye..."