/* $Id$ * $URL$ * * I2C sensors plugin * * Copyright (C) 2003, 2004 Xavier Vello * Copyright (C) 2004 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux 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, or (at your option) * any later version. * * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA. * */ /* * exported functions: * * int plugin_init_i2c_sensors (void) * adds function i2c_sensors() to retrieve informations from * the i2c sensors via sysfs or procfs interface * * -- WARNING -- * This plugin should detect where your sensors are at startup. * If you can't get any token to work, ensure you don't get * an error message with "lcd4linux -Fvvv". * * If so, try to force the path to your sensors in the conf like this : * for sysfs: i2c_sensors-path '/sys/bus/i2c/devices/0-6000/' * for procfs: i2c_sensors-path '/proc/sys/dev/sensors/via686a-isa-6000' * /!\ these path are for my system, change the last dir according to yours */ /* * Available tokens : # represents an int from 1 to 3 (or more) * temp_input# -> temperature of sensor # (in °C) * temp_max# and temp_hyst# -> max and min of sensor # * in_input#, in_min# and in_max# -> voltages * fan_input# -> speed (in RPM) of fan # * fan_min# and fan_div# * * Tokens avaible only via sysfs if suported by your sensors: * curr_input#, curr_min# and curr_max# -> value of current (in amps) * pwm# * temp_crit# -> critical value of sensor # * vid -> cpu core voltage * and maybe others * (see /usr/src/linux/Documentation/i2c/sysfs-interface on linux 2.6) */ #include "config.h" #include #include #include #include #include #include #include #include "debug.h" #include "plugin.h" #include "cfg.h" #include "hash.h" #include "qprintf.h" #ifdef WITH_DMALLOC #include #endif static char *path = NULL; static HASH I2Csensors; static const char *procfs_tokens[4][3] = { {"temp_hyst", "temp_max", "temp_input"}, /* for temp# */ {"in_min", "in_max", "in_input"}, /* for in# */ {"fan_div1", "fan_div2", "fan_div3"}, /* for fan_div */ {"fan_min", "fan_input", ""} /* for fan# */ }; static int (*parse_i2c_sensors) (const char *key); /***********************************************\ * Parsing for new 2.6 kernels 'sysfs' interface * \***********************************************/ static int parse_i2c_sensors_sysfs(const char *key) { char val[32]; char buffer[32]; char file[64]; FILE *stream; strcpy(file, path); strcat(file, key); stream = fopen(file, "r"); if (stream == NULL) { error("i2c_sensors: fopen(%s) failed: %s", file, strerror(errno)); return -1; } fgets(buffer, sizeof(buffer), stream); fclose(stream); if (buffer[0] == '\0') { error("i2c_sensors: %s empty ?!", file); return -1; } /* now the formating stuff, depending on the file : */ /* Some values must be divided by 1000, the others */ /* are parsed directly (we just remove the \n). */ if (!strncmp(key, "temp", 4) || !strncmp(key, "curr", 4) || !strncmp(key, "in", 2) || !strncmp(key, "vid", 3)) { snprintf(val, sizeof(val), "%f", strtod(buffer, NULL) / 1000.0); } else { qprintf(val, sizeof(val), "%s", buffer); /* we supress this nasty \n at the end */ val[strlen(val) - 1] = '\0'; } hash_put(&I2Csensors, key, val); return 0; } /************************************************\ * Parsing for old 2.4 kernels 'procfs' interface * \************************************************/ static int parse_i2c_sensors_procfs(const char *key) { char file[64]; FILE *stream; char buffer[32]; char *value; char *running; int pos = 0; const char delim[3] = " \n"; char final_key[32]; const char *number = &key[strlen(key) - 1]; int tokens_index; /* debug("%s -> %s", key, number); */ strcpy(file, path); if (!strncmp(key, "temp_", 5)) { tokens_index = 0; strcat(file, "temp"); strcat(file, number); } else if (!strncmp(key, "in_", 3)) { tokens_index = 1; strcat(file, "in"); strcat(file, number); } else if (!strncmp(key, "fan_div", 7)) { tokens_index = 2; strcat(file, "fan_div"); number = ""; } else if (!strncmp(key, "fan_", 4)) { tokens_index = 3; strcat(file, "fan"); strcat(file, number); } else { return -1; } stream = fopen(file, "r"); if (stream == NULL) { error("i2c_sensors: fopen(%s) failed: %s", file, strerror(errno)); return -1; } fgets(buffer, sizeof(buffer), stream); fclose(stream); if (buffer[0] == '\0') { error("i2c_sensors: %s empty ?!", file); return -1; } running = strdupa(buffer); while (1) { value = strsep(&running, delim); /* debug("%s pos %i -> %s", file, pos , value); */ if (!value || !strcmp(value, "")) { /* debug("%s pos %i -> BREAK", file, pos); */ break; } else { qprintf(final_key, sizeof(final_key), "%s%s", procfs_tokens[tokens_index][pos], number); /* debug ("%s -> %s", final_key, value); */ hash_put(&I2Csensors, final_key, value); pos++; } } return 0; } /*****************************************\ * Common functions (path search and init) * \*****************************************/ static void my_i2c_sensors_path(const char *method) { struct dirent *dir; struct dirent *file; const char *base; char dname[64]; DIR *fd1; DIR *fd2; int done; if (!strcmp(method, "sysfs")) { base = "/sys/bus/i2c/devices/"; } else if (!strcmp(method, "procfs")) { base = "/proc/sys/dev/sensors/"; /*base="/sensors_2.4/"; // fake dir to test without rebooting 2.4 ;) */ } else { return; } fd1 = opendir(base); if (!fd1) { return; } while ((dir = readdir(fd1))) { /* Skip non-directories and '.' and '..' */ if ((dir->d_type != DT_DIR && dir->d_type != DT_LNK) || strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0) { continue; } /* dname is the absolute path */ strcpy(dname, base); strcat(dname, dir->d_name); strcat(dname, "/"); fd2 = opendir(dname); done = 0; while ((file = readdir(fd2))) { /* FIXME : do all sensors have a temp_input1 ? */ if (!strcmp(file->d_name, "temp_input1") || !strcmp(file->d_name, "temp1_input") || !strcmp(file->d_name, "temp1")) { path = realloc(path, strlen(dname) + 1); strcpy(path, dname); done = 1; break; } } closedir(fd2); if (done) break; } closedir(fd1); } static int configure_i2c_sensors(void) { static int configured = 0; char *path_cfg; if (configured != 0) return configured; path_cfg = cfg_get(NULL, "i2c_sensors-path", ""); if (path_cfg == NULL || *path_cfg == '\0') { /* debug("No path to i2c sensors found in the conf, calling my_i2c_sensors_path()"); */ my_i2c_sensors_path("sysfs"); if (!path) my_i2c_sensors_path("procfs"); if (!path) { error("i2c_sensors: unable to autodetect i2c sensors!"); configured = -1; return configured; } debug("using i2c sensors at %s (autodetected)", path); } else { if (path_cfg[strlen(path_cfg) - 1] != '/') { /* the headless user forgot the trailing slash :/ */ error("i2c_sensors: please add a trailing slash to %s from %s", path_cfg, cfg_source()); path_cfg = realloc(path_cfg, strlen(path_cfg) + 2); strcat(path_cfg, "/"); } debug("using i2c sensors at %s (from %s)", path_cfg, cfg_source()); path = realloc(path, strlen(path_cfg) + 1); strcpy(path, path_cfg); } if (path_cfg) free(path_cfg); /* we activate the function only if there's a possibly path found */ if (strncmp(path, "/sys", 4) == 0) { parse_i2c_sensors = parse_i2c_sensors_sysfs; } else if (strncmp(path, "/proc", 5) == 0) { parse_i2c_sensors = parse_i2c_sensors_procfs; } else { error("i2c_sensors: unknown path %s, should start with /sys or /proc", path); configured = -1; return configured; } hash_create(&I2Csensors); configured = 1; return configured; } void my_i2c_sensors(RESULT * result, RESULT * arg) { int age; char *key; char *val; if (configure_i2c_sensors() < 0) { SetResult(&result, R_STRING, "??"); return; } key = R2S(arg); age = hash_age(&I2Csensors, key); if (age < 0 || age > 250) { parse_i2c_sensors(key); } val = hash_get(&I2Csensors, key, NULL); if (val) { SetResult(&result, R_STRING, val); } else { SetResult(&result, R_STRING, "??"); } } int plugin_init_i2c_sensors(void) { AddFunction("i2c_sensors", 1, my_i2c_sensors); return 0; } void plugin_exit_i2c_sensors(void) { hash_destroy(&I2Csensors); } 05' href='#n205'>205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373