trapping

UNIX+shell范例精解（第4版）代码

#!/bin/ksh
# Scriptname: trapping
# Script to illustrate the trap command and signals
# Can use the signal numbers or ksh abbreviations seen
# below. Cannot use SIGINT, SIGQUIT, etc.
trap 'print "Control-C will not terminate $PROGRAM."' INT
trap 'print "Control-\ will not terminate $PROGRAM."' QUIT
trap 'print "Control-Z will not terminate $PROGRAM."' TSTP
print "Enter any string after the prompt.\
When you are ready to exit, type \"stop\"."
while true
do

	print -n "Go ahead...> "
	read
	if [[ $REPLY = [Ss]top ]]
	then 
		break
	fi
done