trapsig2.ksh

来自「Solaris环境下Shell编程编程」· KSH 代码 · 共 27 行

#!/bin/ksh

# Script name: trapsig2.ksh

integer num

exec 2> /dev/null
trap 'print "You did not enter an integer."' ERR

while (( 1 ))
do
	print -n "Enter any number ( -1 to exit ): "
	read num

	status=$?
	
	if (( num == -1 ))
	then
		break
	elif (( $status == 0 ))
	then
		print "Square of $num is $(( num * num )). \n"
	fi
done

print "Exiting normally"