#!/bin/sh

# Demonstrate reading a file line-by-line, using I/O
# redirection in a compound command
# Also test variable setting inside an implicit subshell.
# Test this under sh and ksh and compare the output.

line="TEST"
save=

if [ -z "$1" ]; then
   echo "Usage: $0 filename"
else
   if [ -r $1 ]; then
      while read line; do
         echo "$line"
         save=$line
      done < $1
   fi
fi
echo "End value of \$line is $line"
echo "End value of \$save is $save"