This is the mail archive of the mailing list for the Cygwin project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

Re: How is textmode/binmode determined in Cygwin 1.1.0 net release fo r pipes?

The default mount mode for the 1.1.0 Net Relesae is binary mode.  This is a
change from the text mode of b20.1.  If your text files contain \r\n then you
need to do one of:

1) force the mounts back to text
2) tr -d '\r' < somefile > newsomefile && mv newsomefile somefile
3) find one of the dos to unix tools and build it to convert the files.

--- David Bolen <> wrote:
> I just recently updated to the recent net release of 1.1.0, and immediately
> started running into some problems with my existing use of rsync, which
> generally disappeared if I reverted to the b20.1 version of cygwin1.dll I
> had previously been using.  I believe I tracked down the underlying cause,
> and have a possible workaround, but I was wondering if anyone could validate
> what I'm seeing and/or suggest a better solution.
> The root problem appears to be that data being generated by rsync is
> somewhere along the line getting interpreted as if it was access to a
> "textmode" filesystem (LF -> CRLF).  I'm using rsync with pipes, so rsync is
> doing read()/write() to descriptors obtained via the pipe() call.  I don't
> seem to have the same problem with socket I/O, so it appears to be something
> specific to the file descriptors returned from pipe().
> My current filesystem mount points are in textmode (I changed the default
> established by setup) since I'm stuck dealing with lots of files that still
> need handling with native NT stuff.  The tools I use either use O_BINARY (as
> rsync does for actual file access) or I can temporarily mount something
> binmode, so this hasn't been an issue.
> I've found that adding CYGWIN=BINMODE to my enviornment seems to resolve the
> issue - my mount points still explicitly set textmode for file access, and
> it looks like the environment variable changed the default pipe handling.
> Can anyone validate that the 1.1.0 release does in fact apply a
> textmode/binmode decision to pipe file descriptors?  Are there any other
> alternatives to setting CYGWIN to override this behavior?
> Thanks for any information.
> -- David
> /-----------------------------------------------------------------------\
>  \               David Bolen            \   E-mail:  /
>   |             FitLinxx, Inc.            \  Phone: (203) 708-5192    |
>  /  860 Canal Street, Stamford, CT  06902   \  Fax: (203) 316-5150     \
> \-----------------------------------------------------------------------/
> --
> Want to unsubscribe from this list?
> Send a message to

Do You Yahoo!?
Talk to your friends online and get email alerts with Yahoo! Messenger.

Want to unsubscribe from this list?
Send a message to

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]