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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2009,2010 Michael Karcher
*
* 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
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "flash.h"
enum dmi_strings {
DMI_SYS_MANUFACTURER,
DMI_SYS_PRODUCT,
DMI_SYS_VERSION,
DMI_BB_MANUFACTURER,
DMI_BB_PRODUCT,
DMI_BB_VERSION,
DMI_ID_INVALID /* This must always be the last entry */
};
/* The short_id for baseboard starts with "m" as in mainboard to leave
"b" available for BIOS */
struct {
const char *dmidecode_name;
char short_id[3];
} dmi_properties[DMI_ID_INVALID] = {
{"system-manufacturer", "sm"},
{"system-product-name", "sp"},
{"system-version", "sv"},
{"baseboard-manufacturer", "mm"},
{"baseboard-product-name", "mp"},
{"baseboard-version", "mv"}
};
#define DMI_COMMAND_LEN_MAX 260
const char *dmidecode_command = "dmidecode";
int has_dmi_support = 0;
char *dmistrings[DMI_ID_INVALID];
/* strings longer than 4096 in DMI are just insane */
#define DMI_MAX_ANSWER_LEN 4096
void dmi_init(void)
{
FILE *dmidecode_pipe;
int i;
char *answerbuf = malloc(DMI_MAX_ANSWER_LEN);
if(!answerbuf)
{
fprintf(stderr, "DMI: couldn't alloc answer buffer\n");
return;
}
for (i = 0; i < DMI_ID_INVALID; i++)
{
char commandline[DMI_COMMAND_LEN_MAX+40];
snprintf(commandline, sizeof(commandline),
"%s -s %s", dmidecode_command,
dmi_properties[i].dmidecode_name);
dmidecode_pipe = popen(commandline, "r");
if (!dmidecode_pipe)
{
printf_debug("DMI pipe open error\n");
goto out_free;
}
if (!fgets(answerbuf, DMI_MAX_ANSWER_LEN, dmidecode_pipe) &&
ferror(dmidecode_pipe))
{
printf_debug("DMI pipe read error\n");
pclose(dmidecode_pipe);
goto out_free;
}
/* Toss all output above DMI_MAX_ANSWER_LEN away to prevent
deadlock on pclose. */
while (!feof(dmidecode_pipe))
getc(dmidecode_pipe);
if (pclose(dmidecode_pipe) != 0)
{
printf_debug("DMI pipe close error\n");
goto out_free;
}
/* chomp trailing newline */
if (answerbuf[0] != 0 &&
answerbuf[strlen(answerbuf) - 1] == '\n')
answerbuf[strlen(answerbuf) - 1] = 0;
printf_debug("DMI string %d: \"%s\"\n", i, answerbuf);
dmistrings[i] = strdup(answerbuf);
}
has_dmi_support = 1;
out_free:
free(answerbuf);
}
/**
* Does an substring/prefix/postfix/whole-string match.
*
* The pattern is matched as-is. The only metacharacters supported are '^'
* at the beginning and '$' at the end. So you can look for "^prefix",
* "suffix$", "substring" or "^complete string$".
*
* @param value The string to check.
* @param pattern The pattern.
* @return Nonzero if pattern matches.
*/
static int dmi_compare(const char *value, const char *pattern)
{
int anchored = 0;
int patternlen;
printf_debug("matching %s against %s\n", value, pattern);
/* The empty string is part of all strings */
if (pattern[0] == 0)
return 1;
if (pattern[0] == '^') {
anchored = 1;
pattern++;
}
patternlen = strlen(pattern);
if (pattern[patternlen - 1] == '$') {
int valuelen = strlen(value);
patternlen--;
if(patternlen > valuelen)
return 0;
/* full string match: require same length */
if(anchored && (valuelen != patternlen))
return 0;
/* start character to make ends match */
value += valuelen - patternlen;
anchored = 1;
}
if (anchored)
return strncmp(value, pattern, patternlen) == 0;
else
return strstr(value, pattern) != NULL;
}
int dmi_match(const char *pattern)
{
int i;
if (!has_dmi_support)
return 0;
for (i = 0;i < DMI_ID_INVALID; i++)
return dmi_compare(dmistrings[i], pattern);
return 0;
}
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