From: "Earnie Boyd" <earnie_boyd@hotmail.com>
To: ead@ixian.com, gnu-win32@cygnus.com, lhall@rfk.com
Cc: joe@jump.com
Subject: Re: Bug in od, cat, etc reading binary files
Date: Mon, 22 Sep 1997 10:29:00 -0000 [thread overview]
Message-ID: <19970922172829.280.qmail@hotmail.com> (raw)
>Date: Mon, 22 Sep 1997 11:03:56 -0400
>To: Eric De Mund <ead@ixian.com>, GNU-Win32 List <gnu-win32@cygnus.com>
>From: Larry Hall <lhall@rfk.com>
>Subject: Re: Bug in od, cat, etc reading binary files
>Cc: Joe Peterson <joe@jump.com>
>
>At 01:30 AM 9/22/97 -0700, Eric De Mund wrote:
>>GNU-Win32 People,
>>
>> Joe Peterson <joe@jump.com> to <gnu-win32@cygnus.com>:
>> ] Sorry if this is documented somewhere, but I could not find
>> ] mention of it. I find that when, for example, using "od" to look
>> ] at a binary file, if a ctrl-Z is encountered, the reading stops.
>> ] This is because the fopen presumably does a "r" rather than a
"rb"
>> ] (a pc-ism).
>> ]
>> ] Other programs like "cat" and possibly others have this problem
as
>> ] well...
>>
>>GNU-Win32 cat(1) does have this problem, as does md5sum(1), rendering
>>them significantly less useful. It's the understanding of this Unix
>>developer new to the Windows world that the equivalent of Microsoft's
>>Visual C++ 5.0 Run-Time Library function _setmode(3) is required
(global
>>variable _fmode in that development world setting the default file-
>>translation mode of all files *except* stdin, stdout, and stderr).
>>
>>Questions: How do I do these in the GNU-Win32 world? How do I:
>> * set the analog of MSVC++5.0's _fmode
>> * call the analog of MSVC++5.0's int _setmode(int handle, int
mode)
>>
>>Thank you,
>>Eric De Mund
>>
>>"Magazines all too frequently lead to books and should be regarded by
the
>>prudent as the heavy petting of literature." --Fran Lebowitz
>
>Eric,
>
>You're half right in your understanding. The problem is due to "text"
>files in Windows and the need to open files in binary mode in order to
>"get things right". You have 2 choices:
>
> - Recompile offending code, either setting the mode or changing all
> file open commands to use the "b" (for binary) flag.
>
> - mount (via the mount command) your filesystems as binary (-b) so
that
> all files are automatically treated as binary just like in UNIX.
This
> step is usually the easiest and best in the long run but also tends
> to cause short term headaches since all the "text" files that you
> currently have will be filled with <cr>s which bash and other
things
> will barf on. Reinstalling the system using cygwin tar/gzip or
> translating all your system files (at least) usually handles the
> problems.
>
>Larry Hall lhall@rfk.com
>RFK Partners, Inc. (781) 239-1053
>8 Grove Street (781) 239-1655 - FAX
>Wellesley, MA 02181
>
>-
>For help on using this list (especially unsubscribing), send a message
to
>"gnu-win32-request@cygnus.com" with one line of text: "help".
>
Eric,
I chose the second option. Check the mail archives for further info.
- \\||//
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next reply other threads:[~1997-09-22 10:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-09-22 10:29 Earnie Boyd [this message]
-- strict thread matches above, loose matches on Subject: below --
1997-09-30 7:14 Larry Hall
1997-09-30 5:02 Earnie Boyd
1997-09-29 18:48 Earnie Boyd
1997-09-29 7:41 marcus
1997-09-29 18:31 ` Pete Jordan
1997-09-29 7:09 marcus
1997-09-29 13:04 ` Mikey
1997-09-29 18:33 ` justin.
1997-09-27 10:03 Larry Hall
1997-09-26 11:34 Earnie Boyd
1997-09-26 8:42 marcus
1997-09-25 1:22 Eric Mills
1997-09-25 6:23 ` Mikey
1997-09-22 8:15 Larry Hall
1997-09-22 1:30 Eric De Mund
1997-09-08 14:23 Joe Peterson
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