This is the mail archive of the cygwin 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]
Other format: [Raw text]

Re: console vs pty (was: Re: First Pass at mintty documentation; etc.)


On Thu, Jan 15, 2009 at 05:44:09AM +0000, Andy Koppe wrote:
>Chuck Wilson wrote:
>>"full screen" or "DOS" is a red herring.  Any program that does
>>something like the following, if compiled as a native program, won't
>>work in rxvt (or MinTTY, or cygwin/cmd-shell-with-CYGWIN=tty):
>>
>> #include <stdio.h>
>> main() {
>>   int c;
>>   while ((c = getc(stdin)) != EOF) fputc(c, stdout);
>> }
>>
>>The thing is, THIS program works as part of a pipeline even when
>>compiled as a native program -- but it breaks if you try to use it
>>interactively within rxvt/MinTTY/etc.  A cygwin-compiled version works
>>in all cases.
>
>I see, thanks for explaining that.  What exactly does happen when
>calling read() that means that pty input doesn't reach the program?

It's buffered differently.  MSVCRT thinks that Cygwin's ptys are pipes so
it buffers the input like a pipe rather than a terminal.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/


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