sysdeps/mach/hurd/open.c

   1 /* Copyright (C) 1991 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23 #include <hurd.h>
  24
  25 /* Open FILE with access OFLAG.  If OFLAG includes O_CREAT,
  26    a third argument is the file protection.  */
  27 int
  28 DEFUN(__open, (file, oflag), CONST char *file AND int oflag DOTS)
  29 {
  30   error_t err;
  31   mode_t mode;
  32   int fl;
  33   int fd;
  34   file_t port;
  35
  36   switch (oflag & O_ACCMODE)
  37     {
  38     case O_RDONLY:
  39       fl = FS_LOOKUP_READ;
  40       break;
  41     case O_WRONLY:
  42       fl = FS_LOOKUP_WRITE;
  43       break;
  44     case O_RDWR:
  45       fl = FS_LOOKUP_READ | FS_LOOKUP_WRITE;
  46       break;
  47     default:
  48       errno = EINVAL;
  49       return -1;
  50     }
  51
  52   if (oflag & O_CREAT)
  53     {
  54       va_list arg;
  55       va_start (arg, oflag);
  56       mode = va_arg (arg, mode_t);
  57       va_end (arg);
  58       fl |= FS_LOOKUP_CREATE;
  59     }
  60   else
  61     mode = 0;
  62
  63   if (oflag & O_NDELAY)
  64     fl |= FS_LOOKUP_NDELAY;
  65   if (oflag & O_APPEND)
  66     fl |= FS_LOOKUP_APPEND;
  67   if (oflag & O_CREATE)
  68     fl |= FS_LOOKUP_CREATE;
  69   if (oflag & O_TRUNC)
  70     fl |= FS_LOOKUP_TRUNC;
  71   if (oflag & O_EXCL)
  72     fl |= FS_LOOKUP_EXCL;
  73
  74   __mutex_lock (&_hurd_dtable.lock);
  75   fd = _hurd_dalloc ();
  76   if (fd < 0)
  77     {
  78       __mutex_unlock (&_hurd_dtable.lock);
  79       return -1;
  80     }
  81
  82   port = __hurd_path_lookup (file, fl, mode);
  83
  84   if (port != MACH_PORT_NULL && !_hurd_hasctty && !(oflag & O_NOCTTY))
  85     {
  86       mach_port_t cttyid;
  87       io_statbuf_t stb;
  88
  89       err = __io_stat (port, &stb);
  90       if (!err)
  91         err = __term_getctty (port, &cttyid);
  92       if (!err)
  93         {
  94           err = __proc_set_ctty (_hurd_proc, cttyid);
  95           __mach_port_deallocate (__mach_task_self (), cttyid);
  96           if (!err)
  97             {
  98               _hurd_dtable.d[fd].isctty = 1;
  99               _hurd_hasctty = 1;
 100               _hurd_ctty_fstype = stb.stb_fstype;
 101               _hurd_ctty_fsid = stb.stb_fsid;
 102               _hurd_ctty_fileid = stb.stb_file_id;
 103             }
 104         }
 105     }
 106
 107   _hurd_dtable.d[fd].server = port;
 108   __mutex_unlock (&_hurd_dtable.lock);
 109   return port == MACH_PORT_NULL ? -1 : fd;
 110 }