Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 29 Dec 2003 15:36:35 +1030
From:      "Rob" <listone@deathbeforedecaf.net>
To:        "Daniela" <dgw@liwest.at>, <questions@freebsd.org>
Subject:   Re: Complex quoting task in tcsh
Message-ID:  <009801c3cdc9$88507280$a4b826cb@goo>
References:  <200312290334.25341.dgw@liwest.at>

Next in thread | Previous in thread | Raw E-Mail | Index | Archive | Help
Daniela,

This isn't the answer you would like, but tcsh is generally considered a
bad language for writing scripts*. It's an excellent command-line shell,
but scripts are not its strong point.

One reason is the one you've just run into - quoting is a little flakey,
especially when you try to do something tricky.

For 'basic' scripts, either sh(1) or ksh(1) is usually the way to go. As
an example, here's your line-checking question, using sh and FreeBSD
commands:

    cat somefile | while read LINE ; do
        if echo "$LINE" | grep -q '^#' ; then
            # do something with $LINE
        fi
    done

For more complex work, perl or python are usually recommended.

On the other hand, if you just want to filter the comments out of a
file, put

    grep -v '^#'

at the start of your pipeline.

* Csh Programming Considered Harmful (1996)
  http://www.perl.com/pub/a/language/versus/csh.html

----- Original Message ----- 
From: "Daniela" <dgw@liwest.at>
Subject: Complex quoting task in tcsh


> I'm writing a tcsh script and I can't figure out how to escape that #.
> I tried all possible variations, and it always says I have a syntax
error.
> Here's one:
> if ($line =~ "#*")
> Or is there another way to find out if the line starts with a hash
mark?
>
> Regards,
> Daniela
>
>
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to
"freebsd-questions-unsubscribe@freebsd.org"
>



Want to link to this message? Use this URL: <http://docs.FreeBSD.org/cgi/mid.cgi?009801c3cdc9$88507280$a4b826cb>