summaryrefslogtreecommitdiff
path: root/sysdeps/mach/hurd/gethostid.c
blob: 4f9b31207d625fee5cd0cb79fa88e193cd945452 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
/* Copyright (C) 1991, 92, 93, 94, 96, 97 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <unistd.h>
#include <hurd.h>
#include "hurdhost.h"

/* Return the current machine's Internet number.  */
long int
gethostid ()
{
  /* The hostid is just the contents of the file /etc/hostid,
     kept as text of hexadecimal digits.  */
  /* XXX this is supposed to come from the hardware serial number */
  char buf[8];
  ssize_t n = _hurd_get_host_config ("/etc/hostid", buf, sizeof buf);
  if (n < 0)
    return -1;
  return strtol (buf, NULL, 16);
}