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Re: Error when script uses CRLF line endings w/ if stmt
From: |
Greg Wooledge |
Subject: |
Re: Error when script uses CRLF line endings w/ if stmt |
Date: |
Fri, 5 Feb 2010 08:10:38 -0500 |
User-agent: |
Mutt/1.4.2.3i |
On Thu, Feb 04, 2010 at 11:54:51PM -0600, Evan Driscoll wrote:
> Why not make Bash consider \r\n a legitimate line ending? What possible
> reason could there be for treating carriage return characters as it does
> now?
Well, the most literal reason is that the shebang (#!/program) line
will not work with a carriage return. This line is read as a comment
by bash, but as a "use this program" directive by the underlying OS.
The OS is going to try to run $'/program\r' and will not find it.
Unless of course you made $'bash\r' a symlink to bash, and so on.
Apart from that, there's no reason a Cygwin-style shell option couldn't
be used on Unix. Other than, of course, the fact that it's a grossly
bad habit to let yourself fall into; and the fact that no other shell
would ever be able to read the script; and the 40 years of precedent for
the current behavior....
- Error when script uses CRLF line endings w/ if stmt, driscoll, 2010/02/04
- Re: Error when script uses CRLF line endings w/ if stmt, Jan Schampera, 2010/02/05
- Re: Error when script uses CRLF line endings w/ if stmt, Evan Driscoll, 2010/02/05
- Re: Error when script uses CRLF line endings w/ if stmt, Pierre Gaston, 2010/02/05
- Re: Error when script uses CRLF line endings w/ if stmt, Evan Driscoll, 2010/02/05
- Message not available
- Re: Error when script uses CRLF line endings w/ if stmt, Jan Schampera, 2010/02/05
- Re: Error when script uses CRLF line endings w/ if stmt, Andreas Schwab, 2010/02/05
- Message not available
- Re: Error when script uses CRLF line endings w/ if stmt, Jan Schampera, 2010/02/05
- Re: Error when script uses CRLF line endings w/ if stmt,
Greg Wooledge <=
Message not available
Re: Error when script uses CRLF line endings w/ if stmt, Eric Blake, 2010/02/05