This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: Reading too few bytes
- From: "Larry Hall (Cygwin)" <reply-to-list-only-lh at cygwin dot com>
- To: cygwin at cygwin dot com
- Date: Tue, 21 Mar 2006 23:42:38 -0500
- Subject: Re: Reading too few bytes
- References: <Pine.LNX.4.63.0603212000250.23743@vgfl.cnhywyhpnf.bet>
- Reply-to: cygwin at cygwin dot com
Paul J. Lucas wrote:
Here's a small test program:
#include <fcntl.h>
#include <cstdlib>
#include <iostream>
using namespace std;
int main() {
int fd = ::open( "ESLF", O_RDONLY );
if ( fd == -1 ) {
cerr << "could not open ESLF file" << endl;
::exit( 1 );
}
char buf[ 64 ];
ssize_t bytesRead = ::read( fd, buf, sizeof( buf ) );
cout << "read " << bytesRead << " bytes" << endl;
::close( fd );
}
Here's the contents of a small biinary file "ESLF" (printed in hex bytes):
54 39 CA 1A 44
When I compile the program as:
g++ -o test test.cpp
and run it, it prints "read 5 bytes" as one would expect. When I compile
the program as:
g++ -mno-cygwin -o test test.cpp
and run it, it prints "read 3 bytes". Why? How do I teg it to read all
5 bytes?
Ask the MinGW llist, since -mno-cygwin simply enables you to run their
compiler "indirectly". As a result, questions about the MinGW compiler
are off-topic for this list, since it's not Cygwin.
See <http://mingw.org/>.
--
Larry Hall http://www.rfk.com
RFK Partners, Inc. (508) 893-9779 - RFK Office
838 Washington Street (508) 893-9889 - FAX
Holliston, MA 01746
--
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/