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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <stdio.h>, <share.h>
 
  Syntax:    FILE *_fsopen( char *filename, char *mode, int shflag );
             mode:   "r", "w", "a", "r+", "w+", "a+"
                     ("t" or "b" appended to <mode> to indicate type)
             shflag: _SH_COMPAT, _SH_DENYNO, _SH_DENYRD, _SH_DENYRW,
                     _SH_DENYWR
 
  Returns:   a pointer to the stream if successful, or NULL if not.
 
  See also:  fopen, fclose, _sopen, _locking, ferror
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