Mail Archives: cygwin/1998/10/31/00:34:15
---Urban Widmark <urban AT svenskatest DOT se> wrote:
>
> (using cygwin32 19.3 & 19.1?)
>
> If I create a small example file:
>
> $ echo a > xx
> $ ls -l xx
> -rw-r--r-- 1 544 everyone 3 Oct 28 15:43 xx
>
> it will contain "a\r\n" since I use the default (non-binary mounts)
>
> But if I do:
> $ echo a | wc -c
> 2
>
> I get only 2 chars ... ok, so the translation is done when writing to
> disk. Then something like this will fail:
>
Actually, the translation is done at the time of read. The \r is
removed when processing in text mode and the read would return 2 even
though 3 was actully read from disk.
> $ echo a | tr -d '\r' > yy
> $ ls -l yy
> -rw-r--r-- 1 544 everyone 3 Oct 28 15:48 yy
>
Well, another improperly ported utility. `tr' should open it's input
and output in binary mode; obviously from this example it isn't.
> So how am I supposed to remove the \r from the echo output? Well, I
know
> non-cygwin ways to remove the \r, the issue is if this is a tr bug, a
> cygwin conversion bug or ...
>
>
> It's also strange that writing to a pipe is different from writing to
> disk, that seems very non-unix'ish. I think it would be better if
> conversion could be toggled by changing an environment variable, it
should
> not depend on the destination of my output.
>
Well, you are at the mercy of the filesystem and text mode processing
will prefix a \r to every \n. This is only a problem if the programs
are not properly ported.
> An environment variable would be better than a registry entry, since
it's
> hard to write "non-conversion" shell scripts that can be run on other
> machines if they depend on a registry entry ... Also some scripts
may need
> the feature turned on, others off.
>
Actually, I'd be in favor of not having either if that meant getting
properly ported code. I wonder if we could get this resolved prior to
the b20 release?
==
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