libvirt/src/util/sysinfo.c

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/*
* sysinfo.c: get SMBIOS/sysinfo information from the host
*
* Copyright (C) 2010 Red Hat, Inc.
* Copyright (C) 2010 Daniel Veillard
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Daniel Veillard <veillard@redhat.com>
*/
#include <config.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include "virterror_internal.h"
#include "sysinfo.h"
#include "util.h"
#include "conf/domain_conf.h"
#include "logging.h"
#include "memory.h"
#define VIR_FROM_THIS VIR_FROM_SYSINFO
#define virSmbiosReportError(code, ...) \
virReportErrorHelper(NULL, VIR_FROM_SYSINFO, code, __FILE__, \
__FUNCTION__, __LINE__, __VA_ARGS__)
#define SYSINFO_SMBIOS_DECODER "dmidecode"
/**
* virSysinfoDefFree:
* @def: a sysinfo structure
*
* Free up the sysinfo structure
*/
void virSysinfoDefFree(virSysinfoDefPtr def)
{
if (def == NULL)
return;
VIR_FREE(def->bios_vendor);
VIR_FREE(def->bios_version);
VIR_FREE(def->bios_date);
VIR_FREE(def->bios_release);
VIR_FREE(def->system_manufacturer);
VIR_FREE(def->system_product);
VIR_FREE(def->system_version);
VIR_FREE(def->system_serial);
VIR_FREE(def->system_uuid);
VIR_FREE(def->system_sku);
VIR_FREE(def->system_family);
VIR_FREE(def);
}
/**
* virSysinfoRead:
*
* Tries to read the SMBIOS information from the current host
*
* Returns: a filled up sysinfo structure or NULL in case of error
*/
#ifdef WIN32
virSysinfoDefPtr
virSysinfoRead(void) {
/*
* this can probably be extracted from Windows using API or registry
* http://www.microsoft.com/whdc/system/platform/firmware/SMBIOS.mspx
*/
virReportSystemError(ENOSYS, "%s",
_("Host sysinfo extraction not supported on this platform"));
return(NULL);
}
#else
virSysinfoDefPtr
virSysinfoRead(void) {
char *path, *cur, *eol, *base;
int pid, outfd = -1, errfd = -1;
virSysinfoDefPtr ret = NULL;
const char *argv[] = { NULL, "-q", "-t", "0,1", NULL };
int res, waitret, exitstatus;
char *outbuf = NULL;
char *errbuf = NULL;
path = virFindFileInPath(SYSINFO_SMBIOS_DECODER);
if (path == NULL) {
virSmbiosReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to find path for %s binary"),
SYSINFO_SMBIOS_DECODER);
return(NULL);
}
argv[0] = path;
res = virExec(argv, NULL, NULL, &pid, -1, &outfd, &errfd,
VIR_EXEC_NONE | VIR_EXEC_NONBLOCK);
if (res < 0) {
virSmbiosReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to execute command %s"),
path);
res = 1;
goto cleanup;
}
/*
* we are interested in the output, capture it and errors too
*/
if (virPipeReadUntilEOF(outfd, errfd, &outbuf, &errbuf) < 0) {
virReportSystemError(errno, _("cannot wait for '%s'"), path);
while (waitpid(pid, &exitstatus, 0) == -1 && errno == EINTR)
;
goto cleanup;
}
if (outbuf)
VIR_DEBUG("Command stdout: %s", outbuf);
if (errbuf)
VIR_DEBUG("Command stderr: %s", errbuf);
while ((waitret = waitpid(pid, &exitstatus, 0) == -1) &&
(errno == EINTR));
if (waitret == -1) {
virReportSystemError(errno, _("Failed to wait for '%s'"), path);
goto cleanup;
}
if (exitstatus != 0) {
virSmbiosReportError(VIR_ERR_INTERNAL_ERROR,
_("command %s failed with error code %d:%s"),
path, exitstatus, errbuf);
goto cleanup;
}
if (VIR_ALLOC(ret) < 0)
goto no_memory;
ret->type = VIR_DOMAIN_SYSINFO_SMBIOS;
base = outbuf;
if ((cur = strstr(base, "Vendor: ")) != NULL) {
cur += 8;
eol = strchr(cur, '\n');
if ((eol) && ((ret->bios_vendor = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Version: ")) != NULL) {
cur += 9;
eol = strchr(cur, '\n');
if ((eol) && ((ret->bios_version = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Release Date: ")) != NULL) {
cur += 14;
eol = strchr(cur, '\n');
if ((eol) && ((ret->bios_date = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "BIOS Revision: ")) != NULL) {
cur += 15;
eol = strchr(cur, '\n');
if ((eol) && ((ret->bios_release = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((base = strstr(outbuf, "System Information")) == NULL)
goto cleanup;
if ((cur = strstr(base, "Manufacturer: ")) != NULL) {
cur += 14;
eol = strchr(cur, '\n');
if ((eol) &&
((ret->system_manufacturer = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Product Name: ")) != NULL) {
cur += 14;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_product = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Version: ")) != NULL) {
cur += 9;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_version = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Serial Number: ")) != NULL) {
cur += 15;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_serial = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "UUID: ")) != NULL) {
cur += 6;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_uuid = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "SKU Number: ")) != NULL) {
cur += 12;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_sku = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
if ((cur = strstr(base, "Family: ")) != NULL) {
cur += 8;
eol = strchr(cur, '\n');
if ((eol) && ((ret->system_family = strndup(cur, eol - cur)) == NULL))
goto no_memory;
}
cleanup:
VIR_FREE(outbuf);
VIR_FREE(errbuf);
VIR_FREE(path);
return(ret);
no_memory:
virReportOOMError();
virSysinfoDefFree(ret);
ret = NULL;
goto cleanup;
}
#endif