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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"
const char *dmidecode_names[] = {
"system-manufacturer",
"system-product-name",
"system-version",
"baseboard-manufacturer",
"baseboard-product-name",
"baseboard-version",
};
#define DMI_COMMAND_LEN_MAX 260
const char *dmidecode_command = "dmidecode";
int has_dmi_support = 0;
char *dmistrings[ARRAY_SIZE(dmidecode_names)];
/* Strings longer than 4096 in DMI are just insane. */
#define DMI_MAX_ANSWER_LEN 4096
static char *get_dmi_string(const char *string_name)
{
FILE *dmidecode_pipe;
char *result;
char answerbuf[DMI_MAX_ANSWER_LEN];
char commandline[DMI_COMMAND_LEN_MAX + 40];
snprintf(commandline, sizeof(commandline),
"%s -s %s", dmidecode_command, string_name);
dmidecode_pipe = popen(commandline, "r");
if (!dmidecode_pipe) {
printf_debug("DMI pipe open error\n");
return NULL;
}
if (!fgets(answerbuf, DMI_MAX_ANSWER_LEN, dmidecode_pipe) &&
ferror(dmidecode_pipe)) {
printf_debug("DMI pipe read error\n");
pclose(dmidecode_pipe);
return NULL;
}
/* 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");
return NULL;
}
/* Chomp trailing newline. */
if (answerbuf[0] != 0 &&
answerbuf[strlen(answerbuf) - 1] == '\n')
answerbuf[strlen(answerbuf) - 1] = 0;
printf_debug("DMI string %s: \"%s\"\n", string_name, answerbuf);
result = strdup(answerbuf);
if (!result)
puts("WARNING: Out of memory - DMI support fails");
return result;
}
void dmi_init(void)
{
int i;
char *chassis_type;
has_dmi_support = 1;
for (i = 0; i < ARRAY_SIZE(dmidecode_names); i++) {
dmistrings[i] = get_dmi_string(dmidecode_names[i]);
if (!dmistrings[i]) {
has_dmi_support = 0;
return;
}
}
chassis_type = get_dmi_string("chassis-type");
if (chassis_type && !strcmp(chassis_type, "Notebook")) {
printf_debug("Laptop detected via DMI\n");
is_laptop = 1;
}
free(chassis_type);
}
/**
* 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 < ARRAY_SIZE(dmidecode_names); i++)
if (dmi_compare(dmistrings[i], pattern))
return 1;
return 0;
}
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