print: Input

• If no files are specified on the command line, print prints the standard input

• Possible problem:

  • The standard input may need to be converted to another format

  • Typically, this means that print will examine the first bit of input

  • Then decide what format it is in

  • Then call another program to convert the formats

  • But examining the first bit of input destroys it!

  • Solution: copy STDIN to a file first

        unless (@ARGV) {
          push @ARGV, save_stdin();
        }

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Copyright © 2004 M. J. Dominus