Shell Programming and Scripting

if [ $# -eq 0 ]
then
    Print "1) all
    Print "q) quit
 
    Print
    Print-n "Command:
 
    read reply
else
    reply=$1
fi

#!/bin/ksh
reply="$1"                                           ### first line to add
[...]
[[ -n "$reply" ]] || {                             ### second line to add
Print "1) all
Print "q) quit

Print
Print -n "Command:

read reply
}                                                    ### third line to add
case $reply in
[...]

main_screen()
{
typeset count
typeset space
typeset device
typeset list
typeset tmp
 
clear
 
while :
do
print "View queue space ..."
print
 
count=0
for device in $all_devices
do
eval set -- \$device_$device
 
for space in $*
do
eval "tmp=\"\$pages_$space\""; 
printf "%2d - %16s : %-20s %6d pages\n" \
$((count+=1)) $device $space $tmp
list="$list $device:$space"
done
done
print
print "1)all - affect all queues"
print "q)uit - Return to main menu"
print
print -n "Command: "
 
read reply
 
case $reply in
a* ) while operate_all
do
: 
done 
 
return 0 ;;
q* ) return 1 ;;
esac
 
set -- $list
 
reply=$(eval print \${$reply} 2>/dev/null)
 
if [[ -n $reply ]]
then
device=${reply%%:*}
space=${reply##*:}
 
while operate_space $device $space 
do
:
done
 
return 0
else
clear
print "\nInvalid selection - please re-enter\n"
fi
done
}