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/***************************************************************************
* CVSID: $Id$
*
* probe-smbios.c : Probe system BIOS according to the SMBIOS/DMI standard
*
* Copyright (C) 2005 David Zeuthen, <david@fubar.dk>
* Copyright (C) 2005 Richard Hughes, <richard@hughsie.com>
*
* Licensed under the Academic Free License version 2.1
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <ctype.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libhal/libhal.h"
#include "shared.h"
#define DMIPARSER_STATE_IGNORE 0
#define DMIPARSER_STATE_BIOS 1
#define DMIPARSER_STATE_SYSTEM 2
#define DMIPARSER_STATE_CHASSIS 3
#define strbegin(buf, str) (strncmp (buf, str, strlen (str)) == 0)
/* global */
char *udi = NULL;
LibHalContext *ctx = NULL;
/** Finds the start of a null terminated string and sets HAL
* property if valid.
*
* @param buf The non tabbed prefixed, null terminated string
* @param str The strings to compare with e.g. "Vendor:"
* @param prop The HAL property to set
* @return TRUE is found, FALSE otherwise.
*/
static int
setstr (char *buf, char *str, char *prop)
{
DBusError error;
char *value;
if (strbegin (buf, str)) {
dbus_error_init (&error);
value = buf + strlen (str) + 1;
libhal_device_set_property_string (ctx, udi, prop, value, &error);
dbg ("Setting %s='%s'", prop, value);
return TRUE;
}
return FALSE;
}
/** Main entry point
*
* @param argc Number of arguments given to program
* @param argv Arguments given to program
* @return Return code
*/
int
main (int argc, char *argv[])
{
int ret;
DBusError error;
char buf[512];
char *nbuf;
int dmipipe[2];
int nullfd;
int tmp_ret;
FILE *f;
int dmiparser_state = DMIPARSER_STATE_IGNORE;
/* on some system chassis pops up several times,
* so only take the first entry for each
*/
int dmiparser_done_bios = FALSE;
int dmiparser_done_system = FALSE;
int dmiparser_done_chassis = FALSE;
/* assume failure */
ret = 1;
_set_debug ();
udi = getenv ("UDI");
if (udi == NULL) {
dbg ("UDI not set");
goto out;
}
dbus_error_init (&error);
if ((ctx = libhal_ctx_init_direct (&error)) == NULL) {
dbg ("ctx init failed");
goto out;
}
tmp_ret = pipe (dmipipe);
f = fdopen (dmipipe[0], "r");
nullfd = open ("/dev/null", O_RDONLY);
/* fork the child process */
switch (fork ()) {
case 0:
/* child */
dup2 (nullfd, STDIN_FILENO);
dup2 (dmipipe[1], STDOUT_FILENO);
close (dmipipe[0]);
close (dmipipe[1]);
/* execute the child */
execl ("/usr/sbin/dmidecode", "/usr/sbin/dmidecode", NULL);
/* throw an error if we ever reach this point */
dbg ("Failed to execute dmidecode!");
exit (1);
break;
case -1:
dbg ("Cannot fork!");
break;
}
/* parent continues from here */
/* close unused descriptor */
close (dmipipe[1]);
/* read the output of the child */
while(fgets (buf, sizeof(buf), f) != NULL)
{
unsigned int i;
unsigned int len;
unsigned int tabs = 0;
/* trim whitespace */
len = strlen (buf);
/* check that will fit in buffer */
if (len >= sizeof (buf))
continue;
/* not big enough for data, and protects us from underflow */
if (len < 3) {
dmiparser_state = DMIPARSER_STATE_IGNORE;
continue;
}
/* find out number of leading tabs */
if (buf[0] == '\t' && buf[1] == '\t')
tabs = 2; /* this is list data */
else if (buf[0] == '\t')
tabs = 1; /* this is data, 0 is section type */
if (tabs == 2)
/* we do not proccess data at depth 2 */
continue;
/* set the section type */
if (tabs == 0) {
if (!dmiparser_done_bios && strbegin (buf, "BIOS Information"))
dmiparser_state = DMIPARSER_STATE_BIOS;
else if (!dmiparser_done_system && strbegin (buf, "System Information"))
dmiparser_state = DMIPARSER_STATE_SYSTEM;
else if (!dmiparser_done_chassis && strbegin (buf, "Chassis Information"))
dmiparser_state = DMIPARSER_STATE_CHASSIS;
else
/*
* We do not match the other sections,
* or sections we have processed before
*/
dmiparser_state = DMIPARSER_STATE_IGNORE;
continue; /* next line */
}
/* we are not in a section we know, no point continueing */
if (dmiparser_state == DMIPARSER_STATE_IGNORE)
continue;
/* removes the leading tab */
nbuf = &buf[1];
/* removes the trailing spaces */
for (i = len - 2; isspace (nbuf[i]) && i >= 0; --i)
nbuf[i] = '\0';
if (dmiparser_state == DMIPARSER_STATE_BIOS) {
setstr (nbuf, "Vendor:", "smbios.bios.vendor");
setstr (nbuf, "Version:", "smbios.bios.version");
setstr (nbuf, "Release Date:", "smbios.bios.release_date");
dmiparser_done_bios = TRUE;
} else if (dmiparser_state == DMIPARSER_STATE_SYSTEM) {
setstr (nbuf, "Manufacturer:", "smbios.system.manufacturer");
setstr (nbuf, "Product Name:", "smbios.system.product");
setstr (nbuf, "Version:", "smbios.system.version");
setstr (nbuf, "Serial Number:", "smbios.system.serial");
setstr (nbuf, "UUID:", "smbios.system.uuid");
dmiparser_done_system = TRUE;
} else if (dmiparser_state == DMIPARSER_STATE_CHASSIS) {
setstr (nbuf, "Manufacturer:", "smbios.chassis.manufacturer");
setstr (nbuf, "Type:", "smbios.chassis.type");
dmiparser_done_chassis = TRUE;
}
}
/* as read to EOF, close */
fclose (f);
/* return success */
ret = 0;
out:
/* free ctx */
if (ctx != NULL) {
dbus_error_init (&error);
libhal_ctx_shutdown (ctx, &error);
libhal_ctx_free (ctx);
}
return ret;
}
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