filecntl.h

   1 /* filecntl.h - Definitions to set file descriptors to close-on-exec. */
   2
   3 /* Copyright (C) 1993 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2, or (at your option) any later
  10    version.
  11
  12    Bash is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with Bash; see the file COPYING.  If not, write to the Free Software
  19    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #if !defined (_FILECNTL_H_)
  22 #define _FILECNTL_H_
  23
  24 #include <fcntl.h>
  25
  26 /* Definitions to set file descriptors to close-on-exec, the Posix way. */
  27 #if !defined (FD_CLOEXEC)
  28 #define FD_CLOEXEC     1
  29 #endif
  30
  31 #define FD_NCLOEXEC    0
  32
  33 #define SET_CLOSE_ON_EXEC(fd)  (fcntl ((fd), F_SETFD, FD_CLOEXEC))
  34 #define SET_OPEN_ON_EXEC(fd)   (fcntl ((fd), F_SETFD, FD_NCLOEXEC))
  35
  36 /* How to open a file in non-blocking mode, the Posix.1 way. */
  37 #if !defined (O_NONBLOCK)
  38 #  if defined (O_NDELAY)
  39 #    define O_NONBLOCK O_NDELAY
  40 #  else
  41 #    define O_NONBLOCK 0
  42 #  endif
  43 #endif
  44
  45 #endif /* ! _FILECNTL_H_ */