[bug] Crazy I/O.

[Earnie Boyd <earnie_boyd@yahoo.com>]

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This bug has to do with getting back to the beginning of a file.  I was trying to test what happens with O_TEXT and O_BINARY based upon the CYGWIN variable and the [no]binmode value.  I'm using the 1998-12-3 release of the cygwin1.dll on NT4SP3.  I haven't tested with a recent snapshot but the list needs to know about this for the distributed version.

I've included a test case.  You must save the file as text.tst.c, gcc -o text text.tst.c, and have your working directory set to the source code.


==
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#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <io.h>

int
main (void)
{
  int fh1, fh2;
  unsigned int nbytes = 60000, bytesread;
  char fh1_IN[60000];
  fh1 = open( "text.tst.c", O_RDONLY | O_TEXT );
  dup2(fh1, 0);
  gets( fh1_IN );
  bytesread = strlen(fh1_IN);
  printf( "read %u bytes from file\n", bytesread );
  {
    unsigned int i;
    for (i=0; i< bytesread; i++) {
      printf( "char value: %i\t\t%c\n", fh1_IN[i], fh1_IN[i] );
    }
  }
  close( fh1 );

  fh1 = open( "text.tst.c", O_RDONLY | O_BINARY );
  lseek( fh1, 0, SEEK_SET ); /* added to try to get the pointer back to the
                                the beginning of the file.  Which doesn't help.
                             */
  dup2(fh1, 0);
  gets( fh1_IN );
  bytesread = strlen(fh1_IN);
  printf( "read %u bytes from file\n", bytesread );
  {
    unsigned int i;
    for (i=0; i< bytesread; i++) {
      printf( "char value: %i\t\t%c\n", fh1_IN[i], fh1_IN[i] );
    }
  }
  close( fh1 );
}