sysdeps/mach/hurd/fchdir.c

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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 not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <hurd.h>
  22 #include <hurd/port.h>
  23 #include <hurd/fd.h>
  24 #include <fcntl.h>
  25
  26 /* Change the current directory to FD.  */
  27
  28 int
  29 __fchdir (fd)
  30      int fd;
  31 {
  32   error_t err;
  33   file_t dir;
  34
  35   err = HURD_DPORT_USE (fd,
  36                         ({
  37                           dir = __file_name_lookup_under (port, "", O_EXEC, 0);
  38                           dir == MACH_PORT_NULL ? errno : 0;
  39                         }));
  40
  41   if (! err)
  42     _hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], dir);
  43
  44   return err ? __hurd_fail (err) : 0;
  45 }
  46 weak_alias (__fchdir, fchdir)