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Re: Re: shebang: automagically obtaining

by nutshell (Beadle)
on Oct 05, 2002 at 02:45 UTC ( #202979=note: print w/replies, xml ) Need Help??

in reply to Re: shebang: automagically obtaining
in thread shebang: automagically obtaining

Trying to get the script to automagically detect it.

This magical line would replace the #! thing.


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Re: Re: Re: shebang: automagically obtaining
by IndyZ (Friar) on Oct 05, 2002 at 03:48 UTC
    I interpret this as meaning, "My script needs to generate it's own shebang line, i.e., it needs to self-modify after it has been loaded by the interpreter." If this is the case, then you are missing the point of the shebang line. It tells the system what interpreter to use when executing a file, whether it is a shell script, Perl script, or Ruby program. Because of this, the shebang must exist before the script is run. Otherwise, the system won't know what interpreter to use and will cough up the error that you saw when you tried BUU's suggestion.

    But, if you could tell us why you need to do something like this, we might be able to offer an alternative solution.


      "But, if you could tell us why you need to do something like this, we might be able to offer an alternative solution."
      No real reason - just would help when distributing scripts if people didn't have to worry about the shebang line.

      The only reason I asked was because I thought I saw it done before.

      Thanks anyway,

        well, from the little that i know the only thing i could say is, if you want to run the script in win32 that you got from a *NIX system, then the shebang doesn't matter since you name the file with a .pl ext and windows uses that to determane that its a perl script. so you could keep the original shebang from the previous system unalterate and the script would still work.
        And for any other ideas, you'll have to ask some one else, I'm no expert.

        learning Perl one statement at a time.
        I believe there is a bash hack to locate the perl interpreter and run it, is that what you are talking about?

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