__open.c

来自「一个C源代码分析器」· C语言 代码 · 共 50 行

/* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <ansidecl.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <hurd.h>
#include <hurd/fd.h>

/* Open FILE with access OFLAG.  If OFLAG includes O_CREAT,
   a third argument is the file protection.  */
int
DEFUN(__open, (file, oflag), CONST char *file AND int oflag DOTS)
{
  mode_t mode;
  io_t port;

  if (oflag & O_CREAT)
    {
      va_list arg;
      va_start (arg, oflag);
      mode = va_arg (arg, mode_t);
      va_end (arg);
    }
  else
    mode = 0;

  port = __file_name_lookup (file, oflag, mode);
  if (port == MACH_PORT_NULL)
    return -1;

  return _hurd_intern_fd (port, oflag, 1);
}