1: /* Set a host configuration item kept as the whole contents of a file.
    2:    Copyright (C) 1996,97,99,2001 Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <fcntl.h>
   21: #include <hurd.h>
   22: #include "hurdhost.h"
   23: 
   24: ssize_t
   25: _hurd_set_host_config (const char *item, const char *value, size_t valuelen)
   26: {
   27:   error_t err;
   28:   mach_msg_type_number_t nwrote;
   29:   file_t new, dir;
   30:   char *name;
   31: 
   32:   dir = __file_name_split (item, &name);
   33:   if (dir == MACH_PORT_NULL)
   34:     return -1;
   35: 
   36:   /* Create a new node.  */
   37:   err = __dir_mkfile (dir, O_WRONLY, 0644, &new);
   38:   if (! err)
   39:     {
   40:       /* Write the contents.  */
   41:       err = __io_write (new, value, valuelen, 0, &nwrote);
   42:       if (! err)
   43:         /* Atomically link the new node onto the name.  */
   44:         err = __dir_link (dir, new, name, 0);
   45:       __mach_port_deallocate (__mach_task_self (), new);
   46:     }
   47:   __mach_port_deallocate (__mach_task_self (), dir);
   48: 
   49:   return err ? __hurd_fail (err) : nwrote;
   50: }