v4.0/src/TOOLS/BLD/INC/FCNTL.H

   1 /***
   2 *fcntl.h - file control options used by open()
   3 *
   4 *   Copyright (c) 1985-1988, Microsoft Corporation.  All rights reserved.
   5 *
   6 *Purpose:
   7 *   This file defines constants for the file control options used
   8 *   by the open() function.
   9 *   [System V]
  10 *
  11 *******************************************************************************/
  12
  13 #define O_RDONLY    0x0000  /* open for reading only */
  14 #define O_WRONLY    0x0001  /* open for writing only */
  15 #define O_RDWR      0x0002  /* open for reading and writing */
  16 #define O_APPEND    0x0008  /* writes done at eof */
  17
  18 #define O_CREAT     0x0100  /* create and open file */
  19 #define O_TRUNC     0x0200  /* open and truncate */
  20 #define O_EXCL      0x0400  /* open only if file doesn't already exist */
  21
  22 /* O_TEXT files have <cr><lf> sequences translated to <lf> on read()'s,
  23 ** and <lf> sequences translated to <cr><lf> on write()'s
  24 */
  25
  26 #define O_TEXT      0x4000  /* file mode is text (translated) */
  27 #define O_BINARY    0x8000  /* file mode is binary (untranslated) */
  28
  29 /* macro to translate the C 2.0 name used to force binary mode for files */
  30
  31 #define O_RAW   O_BINARY
  32
  33 /* Open handle inherit bit */
  34
  35 #define O_NOINHERIT 0x0080      /* child process doesn't inherit file */