diff options
author | Reinhard Tartler <siretart@tauware.de> | 2011-04-27 19:24:15 +0200 |
---|---|---|
committer | Reinhard Tartler <siretart@tauware.de> | 2011-04-27 19:24:15 +0200 |
commit | 181cec4348da40331b3e8ab365732c025ec149b2 (patch) | |
tree | e2e749be67c8253a8096aaf92aab9c51f1a17f7f /plugin_i2c_sensors.c | |
download | lcd4linux-181cec4348da40331b3e8ab365732c025ec149b2.tar.gz |
Import upstream version 0.11.0~svn1143
Diffstat (limited to 'plugin_i2c_sensors.c')
-rw-r--r-- | plugin_i2c_sensors.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/plugin_i2c_sensors.c b/plugin_i2c_sensors.c new file mode 100644 index 0000000..ce70e35 --- /dev/null +++ b/plugin_i2c_sensors.c @@ -0,0 +1,361 @@ +/* $Id: plugin_i2c_sensors.c 1082 2010-01-17 14:40:03Z volker $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_i2c_sensors.c $ + * + * I2C sensors plugin + * + * Copyright (C) 2003, 2004 Xavier Vello <xavier66@free.fr> + * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> + * + * 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 <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include <fcntl.h> +#include <dirent.h> + +#include "debug.h" +#include "plugin.h" +#include "cfg.h" +#include "hash.h" +#include "qprintf.h" +#include "evaluator.h" // if strndup() is not available + +#ifdef WITH_DMALLOC +#include <dmalloc.h> +#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 = strndup(buffer, sizeof(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++; + } + } + free(running); + 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); +} |