Mail Archives: cygwin/1998/04/10/13:33:43
At 06:25 PM 4/8/98 +0900, Tsuyoshi Tada wrote:
>> > In the Linux
>> >
>> > [nagyl AT piheno nagyl]$ echo "aaa"|od -c
>> > 0000000 a a a \n
>> > 0000004
>> >
>> > In the windows NT bash
>> >
>> > bash-2.01$ echo aaa|od -c
>> > 0000000 a a a \r \n
>> > 0000005
>> >
>> >
>> > What the hell is the \r ?????
>>
>> In the DOS/Win32 world, text files have CR LF line endings, as opposed to
>> Unix's LF only. Since echo generates text, it is simply following the
>> convention of the operating system and outputting a proper text file.
>
>I also hait this behavior because I want to do these sort of things:
> tar cf - foo | rsh bar dd of=/dev/rst0 bs=20b
>Funny things is that I can do this operation under NT's command prompt
>without any problem, because tar manages to open pipes in binary mode.
>
>My question is why bash opens pipes in O_TEXT mode, just ignoring
>binmode switch. In addition, what the exact purpose of binmode switch?
>If it's on, can we treat all files in O_BINARY mode without
>mounting all the necessary directory with text=binary ?
>
>I also couldn't find proper info. about glob switch. Any info. would
>be appreciated.
>--
>Tsuyoshi TADA <tsuyo AT soe DOT ty DOT ihi DOT co DOT jp>
>Advanced Analysis Technology Group
>Ship & Offshore Eng. Dept, IHI
>Toyosu 2-1-1, Koto-ku, Tokyo 135, JAPAN
>Tel: 03-3534-3818 Fax: 03-3534-3880
>
b19* versions of bash (2.0.1) are hardcoded to force the pipes to be text
again. I didn't even realize this myself until Sergey pointed it out.
He had recompiled a version to keep pipes as binary for b18 and I got so
used to having it that way, I forgot Cygnus would change it back when I upgraded to b19! I'm building a new bash now so the world is right again!;-)
This explains why what you did works from the DOS prompt and not from inside
bash. I guess bash should really be changed to look at the bin setting in
CYGWIN32 environment variable so that this is more configurable...
Larry Hall lhall AT rfk DOT com
RFK Partners, Inc. (781) 239-1053
8 Grove Street (781) 239-1655 - FAX
Wellesley, MA 02181 http://www.rfk.com
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