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/* Copyright (c) 2009 Nicira Networks
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, Nicira Networks gives permission
* to link the code of its release of vswitchd with the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the same
* license as the "OpenSSL" library), and distribute the linked
* executables. You must obey the GNU General Public License in all
* respects for all of the code used other than "OpenSSL". If you modify
* this file, you may extend this exception to your version of the file,
* but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*/
#include <config.h>
#include "xenserver.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dynamic-string.h"
#include "process.h"
#include "vlog.h"
#define THIS_MODULE VLM_xenserver
static char *
read_host_uuid(void)
{
static const char filename[] = "/etc/xensource-inventory";
char line[128];
FILE *file;
file = fopen(filename, "r");
if (!file) {
if (errno == ENOENT) {
VLOG_INFO("not running on a XenServer");
} else {
VLOG_INFO("%s: open: %s", filename, strerror(errno));
}
return NULL;
}
while (fgets(line, sizeof line, file)) {
static const char leader[] = "INSTALLATION_UUID='";
const int leader_len = strlen(leader);
const int uuid_len = 36;
static const char trailer[] = "'\n";
const int trailer_len = strlen(trailer);
if (strlen(line) == leader_len + uuid_len + trailer_len
&& !memcmp(line, leader, leader_len)
&& !memcmp(line + leader_len + uuid_len, trailer, trailer_len)) {
char *host_uuid = xmemdup0(line + leader_len, uuid_len);
VLOG_INFO("running on XenServer, host-uuid %s", host_uuid);
fclose(file);
return host_uuid;
}
}
fclose(file);
VLOG_ERR("%s: INSTALLATION_UUID not found", filename);
return NULL;
}
const char *
xenserver_get_host_uuid(void)
{
static char *host_uuid;
static bool inited;
if (!inited) {
host_uuid = read_host_uuid();
inited = true;
}
return host_uuid;
}
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