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/* Copyright (C) 1991-2020 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <unistd.h>
#include <hurd.h>
#include "hurdhost.h"
/* Return the current machine's Internet number. */
long int
gethostid (void)
{
/* 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);
}
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