Important Notice

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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  Include:   <fcntl.h>, <io.h>, <share.h>, <sys\types.h>, <sys\stat.h>,
             <errno.h>
 
  Syntax:    int sopen( char *filename, int oflag,
                        int shflag [, int pmode] );
 
             oflag:  O_APPEND, O_BINARY, O_CREAT, O_EXCL, O_RDONLY
                     O_RDWR, O_TEXT, O_TRUNC, O_WRONLY
                     (may be joined by |)
             shflag: SH_COMPAT, SH_DENYNO, SH_DENYRD, SH_DENYRW,
                     SH_DENYWR
             pmode:  S_IWRITE, S_IREAD, S_IREAD | S_IWRITE
 
  Returns:   a handle if successful, or -1 if not.
             errno: EACCES, EEXIST, EMFILE, ENOENT
 
  See also:  close, creat, fopen, open, umask
                                    -♦-