Reading too few bytes

["Paul J. Lucas" <pauljlucas at mac dot com>]

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?

- Paul


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