573 lines
12 KiB
C
573 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
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#define _GNU_SOURCE
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#include <dirent.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <regex.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/signalfd.h>
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#include <sys/timerfd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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#include <linux/thermal.h>
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#include <libconfig.h>
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#include "thermal-tools.h"
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#define CLASS_THERMAL "/sys/class/thermal"
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enum {
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THERMOMETER_SUCCESS = 0,
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THERMOMETER_OPTION_ERROR,
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THERMOMETER_LOG_ERROR,
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THERMOMETER_CONFIG_ERROR,
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THERMOMETER_TIME_ERROR,
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THERMOMETER_INIT_ERROR,
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THERMOMETER_RUNTIME_ERROR
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};
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struct options {
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int loglvl;
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int logopt;
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int overwrite;
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int duration;
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const char *config;
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char postfix[PATH_MAX];
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char output[PATH_MAX];
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};
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struct tz_regex {
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regex_t regex;
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int polling;
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};
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struct configuration {
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struct tz_regex *tz_regex;
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int nr_tz_regex;
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};
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struct tz {
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FILE *file_out;
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int fd_temp;
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int fd_timer;
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int polling;
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const char *name;
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};
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struct thermometer {
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struct tz *tz;
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int nr_tz;
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};
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static struct tz_regex *configuration_tz_match(const char *expr,
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struct configuration *config)
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{
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int i;
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for (i = 0; i < config->nr_tz_regex; i++) {
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if (!regexec(&config->tz_regex[i].regex, expr, 0, NULL, 0))
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return &config->tz_regex[i];
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}
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return NULL;
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}
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static int configuration_default_init(struct configuration *config)
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{
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config->tz_regex = realloc(config->tz_regex, sizeof(*config->tz_regex) *
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(config->nr_tz_regex + 1));
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if (regcomp(&config->tz_regex[config->nr_tz_regex].regex, ".*",
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REG_NOSUB | REG_EXTENDED)) {
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ERROR("Invalid regular expression\n");
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return -1;
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}
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config->tz_regex[config->nr_tz_regex].polling = 250;
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config->nr_tz_regex = 1;
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return 0;
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}
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static int configuration_init(const char *path, struct configuration *config)
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{
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config_t cfg;
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config_setting_t *tz;
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int i, length;
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if (path && access(path, F_OK)) {
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ERROR("'%s' is not accessible\n", path);
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return -1;
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}
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if (!path && !config->nr_tz_regex) {
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INFO("No thermal zones configured, using wildcard for all of them\n");
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return configuration_default_init(config);
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}
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config_init(&cfg);
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if (!config_read_file(&cfg, path)) {
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ERROR("Failed to parse %s:%d - %s\n", config_error_file(&cfg),
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config_error_line(&cfg), config_error_text(&cfg));
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return -1;
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}
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tz = config_lookup(&cfg, "thermal-zones");
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if (!tz) {
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ERROR("No thermal zone configured to be monitored\n");
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return -1;
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}
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length = config_setting_length(tz);
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INFO("Found %d thermal zone(s) regular expression\n", length);
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for (i = 0; i < length; i++) {
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config_setting_t *node;
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const char *name;
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int polling;
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node = config_setting_get_elem(tz, i);
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if (!node) {
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ERROR("Missing node name '%d'\n", i);
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return -1;
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}
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if (!config_setting_lookup_string(node, "name", &name)) {
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ERROR("Thermal zone name not found\n");
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return -1;
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}
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if (!config_setting_lookup_int(node, "polling", &polling)) {
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ERROR("Polling value not found");
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return -1;
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}
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config->tz_regex = realloc(config->tz_regex, sizeof(*config->tz_regex) *
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(config->nr_tz_regex + 1));
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if (regcomp(&config->tz_regex[config->nr_tz_regex].regex, name,
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REG_NOSUB | REG_EXTENDED)) {
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ERROR("Invalid regular expression '%s'\n", name);
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continue;
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}
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config->tz_regex[config->nr_tz_regex].polling = polling;
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config->nr_tz_regex++;
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INFO("Thermal zone regular expression '%s' with polling %d\n",
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name, polling);
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}
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return 0;
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}
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static void usage(const char *cmd)
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{
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printf("%s Version: %s\n", cmd, VERSION);
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printf("Usage: %s [options]\n", cmd);
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printf("\t-h, --help\t\tthis help\n");
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printf("\t-o, --output <dir>\toutput directory for temperature capture\n");
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printf("\t-c, --config <file>\tconfiguration file\n");
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printf("\t-d, --duration <seconds>\tcapture duration\n");
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printf("\t-l, --loglevel <level>\tlog level: ");
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printf("DEBUG, INFO, NOTICE, WARN, ERROR\n");
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printf("\t-p, --postfix <string>\tpostfix to be happened at the end of the files\n");
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printf("\t-s, --syslog\t\toutput to syslog\n");
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printf("\t-w, --overwrite\t\toverwrite the temperature capture files if they exist\n");
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printf("\n");
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exit(0);
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}
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static int options_init(int argc, char *argv[], struct options *options)
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{
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int opt;
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time_t now = time(NULL);
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struct option long_options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "config", required_argument, NULL, 'c' },
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{ "duration", required_argument, NULL, 'd' },
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{ "loglevel", required_argument, NULL, 'l' },
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{ "postfix", required_argument, NULL, 'p' },
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{ "output", required_argument, NULL, 'o' },
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{ "syslog", required_argument, NULL, 's' },
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{ "overwrite", no_argument, NULL, 'w' },
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{ 0, 0, 0, 0 }
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};
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strftime(options->postfix, sizeof(options->postfix),
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"-%Y-%m-%d_%H:%M:%S", gmtime(&now));
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while (1) {
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int optindex = 0;
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opt = getopt_long(argc, argv, "ho:c:d:l:p:sw", long_options, &optindex);
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if (opt == -1)
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break;
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switch (opt) {
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case 'c':
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options->config = optarg;
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break;
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case 'd':
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options->duration = atoi(optarg) * 1000;
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break;
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case 'l':
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options->loglvl = log_str2level(optarg);
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break;
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case 'h':
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usage(basename(argv[0]));
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break;
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case 'p':
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strcpy(options->postfix, optarg);
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break;
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case 'o':
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strcpy(options->output, optarg);
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break;
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case 's':
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options->logopt = TO_SYSLOG;
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break;
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case 'w':
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options->overwrite = 1;
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break;
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default: /* '?' */
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ERROR("Usage: %s --help\n", argv[0]);
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return -1;
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}
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}
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return 0;
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}
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static int thermometer_add_tz(const char *path, const char *name, int polling,
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struct thermometer *thermometer)
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{
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int fd;
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char tz_path[PATH_MAX];
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sprintf(tz_path, CLASS_THERMAL"/%s/temp", path);
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fd = open(tz_path, O_RDONLY);
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if (fd < 0) {
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ERROR("Failed to open '%s': %m\n", tz_path);
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return -1;
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}
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thermometer->tz = realloc(thermometer->tz,
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sizeof(*thermometer->tz) * (thermometer->nr_tz + 1));
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if (!thermometer->tz) {
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ERROR("Failed to allocate thermometer->tz\n");
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return -1;
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}
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thermometer->tz[thermometer->nr_tz].fd_temp = fd;
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thermometer->tz[thermometer->nr_tz].name = strdup(name);
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thermometer->tz[thermometer->nr_tz].polling = polling;
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thermometer->nr_tz++;
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INFO("Added thermal zone '%s->%s (polling:%d)'\n", path, name, polling);
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return 0;
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}
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static int thermometer_init(struct configuration *config,
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struct thermometer *thermometer)
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{
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DIR *dir;
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struct dirent *dirent;
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struct tz_regex *tz_regex;
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const char *tz_dirname = "thermal_zone";
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if (mainloop_init()) {
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ERROR("Failed to start mainloop\n");
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return -1;
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}
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dir = opendir(CLASS_THERMAL);
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if (!dir) {
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ERROR("failed to open '%s'\n", CLASS_THERMAL);
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return -1;
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}
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while ((dirent = readdir(dir))) {
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char tz_type[THERMAL_NAME_LENGTH];
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char tz_path[PATH_MAX];
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FILE *tz_file;
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if (strncmp(dirent->d_name, tz_dirname, strlen(tz_dirname)))
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continue;
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sprintf(tz_path, CLASS_THERMAL"/%s/type", dirent->d_name);
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tz_file = fopen(tz_path, "r");
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if (!tz_file) {
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ERROR("Failed to open '%s': %m", tz_path);
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continue;
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}
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fscanf(tz_file, "%s", tz_type);
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fclose(tz_file);
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tz_regex = configuration_tz_match(tz_type, config);
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if (!tz_regex)
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continue;
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if (thermometer_add_tz(dirent->d_name, tz_type,
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tz_regex->polling, thermometer))
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continue;
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}
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closedir(dir);
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return 0;
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}
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static int timer_temperature_callback(int fd, void *arg)
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{
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struct tz *tz = arg;
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char buf[16] = { 0 };
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pread(tz->fd_temp, buf, sizeof(buf), 0);
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fprintf(tz->file_out, "%ld %s", getuptimeofday_ms(), buf);
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read(fd, buf, sizeof(buf));
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return 0;
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}
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static int thermometer_start(struct thermometer *thermometer,
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struct options *options)
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{
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struct itimerspec timer_it = { 0 };
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char *path;
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FILE *f;
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int i;
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INFO("Capturing %d thermal zone(s) temperature...\n", thermometer->nr_tz);
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if (access(options->output, F_OK) && mkdir(options->output, 0700)) {
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ERROR("Failed to create directory '%s'\n", options->output);
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return -1;
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}
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for (i = 0; i < thermometer->nr_tz; i++) {
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asprintf(&path, "%s/%s%s", options->output,
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thermometer->tz[i].name, options->postfix);
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if (!options->overwrite && !access(path, F_OK)) {
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ERROR("'%s' already exists\n", path);
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return -1;
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}
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f = fopen(path, "w");
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if (!f) {
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ERROR("Failed to create '%s':%m\n", path);
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return -1;
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}
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fprintf(f, "timestamp(ms) %s(°mC)\n", thermometer->tz[i].name);
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thermometer->tz[i].file_out = f;
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DEBUG("Created '%s' file for thermal zone '%s'\n", path, thermometer->tz[i].name);
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/*
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* Create polling timer
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*/
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thermometer->tz[i].fd_timer = timerfd_create(CLOCK_MONOTONIC, 0);
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if (thermometer->tz[i].fd_timer < 0) {
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||
|
|
ERROR("Failed to create timer for '%s': %m\n",
|
||
|
|
thermometer->tz[i].name);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
DEBUG("Watching '%s' every %d ms\n",
|
||
|
|
thermometer->tz[i].name, thermometer->tz[i].polling);
|
||
|
|
|
||
|
|
timer_it.it_interval = timer_it.it_value =
|
||
|
|
msec_to_timespec(thermometer->tz[i].polling);
|
||
|
|
|
||
|
|
if (timerfd_settime(thermometer->tz[i].fd_timer, 0,
|
||
|
|
&timer_it, NULL) < 0)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (mainloop_add(thermometer->tz[i].fd_timer,
|
||
|
|
timer_temperature_callback,
|
||
|
|
&thermometer->tz[i]))
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int thermometer_execute(int argc, char *argv[], char *const envp[], pid_t *pid)
|
||
|
|
{
|
||
|
|
if (!argc)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
*pid = fork();
|
||
|
|
if (*pid < 0) {
|
||
|
|
ERROR("Failed to fork process: %m");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(*pid)) {
|
||
|
|
execvpe(argv[0], argv, envp);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int kill_process(__maybe_unused int fd, void *arg)
|
||
|
|
{
|
||
|
|
pid_t pid = *(pid_t *)arg;
|
||
|
|
|
||
|
|
if (kill(pid, SIGTERM))
|
||
|
|
ERROR("Failed to send SIGTERM signal to '%d': %p\n", pid);
|
||
|
|
else if (waitpid(pid, NULL, 0))
|
||
|
|
ERROR("Failed to wait pid '%d': %p\n", pid);
|
||
|
|
|
||
|
|
mainloop_exit();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int exit_mainloop(__maybe_unused int fd, __maybe_unused void *arg)
|
||
|
|
{
|
||
|
|
mainloop_exit();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int thermometer_wait(struct options *options, pid_t pid)
|
||
|
|
{
|
||
|
|
int fd;
|
||
|
|
sigset_t mask;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If there is a duration specified, we will exit the mainloop
|
||
|
|
* and gracefully close all the files which will flush the
|
||
|
|
* file system cache
|
||
|
|
*/
|
||
|
|
if (options->duration) {
|
||
|
|
struct itimerspec timer_it = { 0 };
|
||
|
|
|
||
|
|
timer_it.it_value = msec_to_timespec(options->duration);
|
||
|
|
|
||
|
|
fd = timerfd_create(CLOCK_MONOTONIC, 0);
|
||
|
|
if (fd < 0) {
|
||
|
|
ERROR("Failed to create duration timer: %m\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (timerfd_settime(fd, 0, &timer_it, NULL)) {
|
||
|
|
ERROR("Failed to set timer time: %m\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mainloop_add(fd, pid < 0 ? exit_mainloop : kill_process, &pid)) {
|
||
|
|
ERROR("Failed to set timer exit mainloop callback\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We want to catch any keyboard interrupt, as well as child
|
||
|
|
* signals if any in order to exit properly
|
||
|
|
*/
|
||
|
|
sigemptyset(&mask);
|
||
|
|
sigaddset(&mask, SIGINT);
|
||
|
|
sigaddset(&mask, SIGQUIT);
|
||
|
|
sigaddset(&mask, SIGCHLD);
|
||
|
|
|
||
|
|
if (sigprocmask(SIG_BLOCK, &mask, NULL)) {
|
||
|
|
ERROR("Failed to set sigprocmask: %m\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
fd = signalfd(-1, &mask, 0);
|
||
|
|
if (fd < 0) {
|
||
|
|
ERROR("Failed to set the signalfd: %m\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mainloop_add(fd, exit_mainloop, NULL)) {
|
||
|
|
ERROR("Failed to set timer exit mainloop callback\n");
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return mainloop(-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int thermometer_stop(struct thermometer *thermometer)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
INFO("Closing/flushing output files\n");
|
||
|
|
|
||
|
|
for (i = 0; i < thermometer->nr_tz; i++)
|
||
|
|
fclose(thermometer->tz[i].file_out);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char *argv[], char *const envp[])
|
||
|
|
{
|
||
|
|
struct options options = {
|
||
|
|
.loglvl = LOG_DEBUG,
|
||
|
|
.logopt = TO_STDOUT,
|
||
|
|
.output = ".",
|
||
|
|
};
|
||
|
|
struct configuration config = { 0 };
|
||
|
|
struct thermometer thermometer = { 0 };
|
||
|
|
|
||
|
|
pid_t pid = -1;
|
||
|
|
|
||
|
|
if (options_init(argc, argv, &options))
|
||
|
|
return THERMOMETER_OPTION_ERROR;
|
||
|
|
|
||
|
|
if (log_init(options.loglvl, argv[0], options.logopt))
|
||
|
|
return THERMOMETER_LOG_ERROR;
|
||
|
|
|
||
|
|
if (configuration_init(options.config, &config))
|
||
|
|
return THERMOMETER_CONFIG_ERROR;
|
||
|
|
|
||
|
|
if (uptimeofday_init())
|
||
|
|
return THERMOMETER_TIME_ERROR;
|
||
|
|
|
||
|
|
if (thermometer_init(&config, &thermometer))
|
||
|
|
return THERMOMETER_INIT_ERROR;
|
||
|
|
|
||
|
|
if (thermometer_start(&thermometer, &options))
|
||
|
|
return THERMOMETER_RUNTIME_ERROR;
|
||
|
|
|
||
|
|
if (thermometer_execute(argc - optind, &argv[optind], envp, &pid))
|
||
|
|
return THERMOMETER_RUNTIME_ERROR;
|
||
|
|
|
||
|
|
if (thermometer_wait(&options, pid))
|
||
|
|
return THERMOMETER_RUNTIME_ERROR;
|
||
|
|
|
||
|
|
if (thermometer_stop(&thermometer))
|
||
|
|
return THERMOMETER_RUNTIME_ERROR;
|
||
|
|
|
||
|
|
return THERMOMETER_SUCCESS;
|
||
|
|
}
|