Reading input piped to a bash script

From: Olle Eriksson (pt00oer_at_student.bth.se)
Date: 10/18/04

  • Next message: Chris Metzler: "Re: How to configure apt to retrieve Packages.bz2?" 
    To: debian-user@lists.debian.org
Date: Mon, 18 Oct 2004 19:51:49 +0200

    Hi

    Can anyone explain how I can read input to a bash script through a pipe?

    I want to be able to receive input both through a pipe, and through
    parameters to the script. For example:

      echo "blabla" | myscript.sh
    and
      myscript.sh "blabla"

    The script should be able to check whether or not any input is coming
    through the pipe, and if not use $1. I have tried with cat and read but
    they always asks the user interactively if nothing is piped to the
    script.

    Thanks
    Olle 

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