examples/multiline.sh

   1 #!/bin/sh
   2 # Showing one possible way of doing multiline input
   3
   4 function readline {
   5     echo -n '<' >&3
   6     read line
   7     ret=$?
   8     echo -n '>' >&3
   9     echo "$line"
  10     return $ret
  11 }
  12
  13 while readline; do true; done | (
  14     echo "Enter your message, ending with a line consisting of a single dot."
  15     # dot-stuff as in RFC 5321: to input a line starting with a literal dot,
  16     # use two dots.
  17     message="$(sed -n '/^\.$/q;s/^\.//;p')"
  18     echo "You wrote the following $(echo "$message"|wc -l) line(s):"
  19     echo "$message"
  20 )