/* * 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 #include #include #include "flash.h" int has_dmi_support = 0; #if STANDALONE /* Stub to indicate missing DMI functionality. * has_dmi_support is 0 by default, so nothing to do here. * Because dmidecode is not available on all systems, the goal is to implement * the DMI subset we need directly in this file. */ void dmi_init(void) { } int dmi_match(const char *pattern) { return 0; } #else /* STANDALONE */ 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"; 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) { msg_perr("DMI pipe open error\n"); return NULL; } if (!fgets(answerbuf, DMI_MAX_ANSWER_LEN, dmidecode_pipe)) { if(ferror(dmidecode_pipe)) { msg_perr("DMI pipe read error\n"); pclose(dmidecode_pipe); return NULL; } else { answerbuf[0] = 0; /* Hit EOF */ } } /* 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) { msg_pinfo("dmidecode execution unsucessfull - continuing " "without DMI info\n"); return NULL; } /* Chomp trailing newline. */ if (answerbuf[0] != 0 && answerbuf[strlen(answerbuf) - 1] == '\n') answerbuf[strlen(answerbuf) - 1] = 0; msg_pdbg("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") || !strcmp(chassis_type, "Portable"))) { msg_pdbg("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$". * * @param value The string to check. * @param pattern The pattern. * @return Nonzero if pattern matches. */ static int dmi_compare(const char *value, const char *pattern) { int anchored = 0; int patternlen; msg_pspew("matching %s against %s\n", value, pattern); /* The empty string is part of all strings! */ if (pattern[0] == 0) return 1; if (pattern[0] == '^') { anchored = 1; pattern++; } patternlen = strlen(pattern); if (pattern[patternlen - 1] == '$') { 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; } #endif /* STANDALONE */