Thread: Execute Input - Shell Scipt

  1. #1
    Registered User
    Join Date
    Apr 2009

    Execute Input - Shell Scipt

    I am making a shell script in linux with the bash shell. I am wondering what I can do to execute the input of a user. I am trying to get the user to enter an environment variable that already exists. Then my script will execute the variable they entered.
    [code]echo "enter envir variable:"
    read Envir
    echo $Envir

    When I run the program and enter an environment var like "$PATH" it just echoes "$PATH" how do I get it to execute the value of $PATH, which should be:
    "bash: /usr/bin:/bin:/usr/local/bin:/usr/X11R6/bin:/usr/local/jdk/bin:/usr/local/ oracle/software/bin:"

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Like this?
    $ a="echo hello"
    $ eval $a
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
    Registered User
    Join Date
    Apr 2009
    so its called an eval command, i'm new to this. thanks

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