// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* tmon.c Thermal Monitor (TMON) main function and entry point
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*
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* Copyright (C) 2012 Intel Corporation. All rights reserved.
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*
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* Author: Jacob Pan <jacob.jun.pan@linux.intel.com>
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*/
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#include <getopt.h>
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#include <unistd.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/types.h>
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#include <sys/stat.h>
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#include <ncurses.h>
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#include <ctype.h>
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#include <time.h>
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#include <signal.h>
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#include <limits.h>
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#include <sys/time.h>
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#include <pthread.h>
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#include <math.h>
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#include <stdarg.h>
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#include <syslog.h>
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#include "tmon.h"
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unsigned long ticktime = 1; /* seconds */
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unsigned long no_control = 1; /* monitoring only or use cooling device for
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* temperature control.
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*/
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double time_elapsed = 0.0;
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unsigned long target_temp_user = 65; /* can be select by tui later */
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int dialogue_on;
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int tmon_exit;
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static short daemon_mode;
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static int logging; /* for recording thermal data to a file */
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static int debug_on;
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FILE *tmon_log;
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/*cooling device used for the PID controller */
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char ctrl_cdev[CDEV_NAME_SIZE] = "None";
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int target_thermal_zone; /* user selected target zone instance */
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static void start_daemon_mode(void);
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pthread_t event_tid;
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pthread_mutex_t input_lock;
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void usage(void)
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{
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printf("Usage: tmon [OPTION...]\n");
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printf(" -c, --control cooling device in control\n");
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printf(" -d, --daemon run as daemon, no TUI\n");
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printf(" -g, --debug debug message in syslog\n");
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printf(" -h, --help show this help message\n");
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printf(" -l, --log log data to /var/tmp/tmon.log\n");
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printf(" -t, --time-interval sampling time interval, > 1 sec.\n");
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printf(" -T, --target-temp initial target temperature\n");
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printf(" -v, --version show version\n");
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printf(" -z, --zone target thermal zone id\n");
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exit(0);
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}
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void version(void)
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{
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printf("TMON version %s\n", VERSION);
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exit(EXIT_SUCCESS);
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}
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static void tmon_cleanup(void)
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{
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syslog(LOG_INFO, "TMON exit cleanup\n");
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fflush(stdout);
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refresh();
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if (tmon_log)
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fclose(tmon_log);
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if (event_tid) {
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pthread_mutex_lock(&input_lock);
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pthread_cancel(event_tid);
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pthread_mutex_unlock(&input_lock);
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pthread_mutex_destroy(&input_lock);
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}
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closelog();
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/* relax control knobs, undo throttling */
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set_ctrl_state(0);
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keypad(stdscr, FALSE);
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echo();
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nocbreak();
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close_windows();
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endwin();
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free_thermal_data();
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exit(1);
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}
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static void tmon_sig_handler(int sig)
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{
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syslog(LOG_INFO, "TMON caught signal %d\n", sig);
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refresh();
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switch (sig) {
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case SIGTERM:
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printf("sigterm, exit and clean up\n");
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fflush(stdout);
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break;
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case SIGKILL:
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printf("sigkill, exit and clean up\n");
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fflush(stdout);
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break;
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case SIGINT:
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printf("ctrl-c, exit and clean up\n");
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fflush(stdout);
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break;
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default:
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break;
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}
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tmon_exit = true;
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}
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static void start_syslog(void)
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{
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if (debug_on)
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setlogmask(LOG_UPTO(LOG_DEBUG));
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else
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setlogmask(LOG_UPTO(LOG_ERR));
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openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
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syslog(LOG_NOTICE, "TMON started by User %d", getuid());
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}
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static void prepare_logging(void)
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{
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int i;
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struct stat logstat;
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if (!logging)
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return;
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/* open local data log file */
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tmon_log = fopen(TMON_LOG_FILE, "w+");
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if (!tmon_log) {
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syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
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return;
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}
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if (lstat(TMON_LOG_FILE, &logstat) < 0) {
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syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
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fclose(tmon_log);
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tmon_log = NULL;
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return;
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}
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/* The log file must be a regular file owned by us */
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if (S_ISLNK(logstat.st_mode)) {
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syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
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fclose(tmon_log);
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tmon_log = NULL;
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return;
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}
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if (logstat.st_uid != getuid()) {
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syslog(LOG_ERR, "We don't own the log file. Not logging\n");
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fclose(tmon_log);
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tmon_log = NULL;
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return;
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}
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fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
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for (i = 0; i < ptdata.nr_tz_sensor; i++) {
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char binding_str[33]; /* size of long + 1 */
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int j;
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memset(binding_str, 0, sizeof(binding_str));
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for (j = 0; j < 32; j++)
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binding_str[j] = (ptdata.tzi[i].cdev_binding & (1 << j)) ?
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'1' : '0';
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fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
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ptdata.tzi[i].type,
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ptdata.tzi[i].instance,
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binding_str);
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for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
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fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
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trip_type_name[ptdata.tzi[i].tp[j].type],
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ptdata.tzi[i].tp[j].temp);
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}
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}
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for (i = 0; i < ptdata.nr_cooling_dev; i++)
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fprintf(tmon_log, "#cooling devices%02d: %s\n",
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i, ptdata.cdi[i].type);
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fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
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fprintf(tmon_log, "Samples TargetTemp ");
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for (i = 0; i < ptdata.nr_tz_sensor; i++) {
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fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
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ptdata.tzi[i].instance);
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}
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for (i = 0; i < ptdata.nr_cooling_dev; i++)
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fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
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ptdata.cdi[i].instance);
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fprintf(tmon_log, "\n");
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}
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static struct option opts[] = {
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{ "control", 1, NULL, 'c' },
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{ "daemon", 0, NULL, 'd' },
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{ "time-interval", 1, NULL, 't' },
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{ "target-temp", 1, NULL, 'T' },
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{ "log", 0, NULL, 'l' },
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{ "help", 0, NULL, 'h' },
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{ "version", 0, NULL, 'v' },
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{ "debug", 0, NULL, 'g' },
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{ 0, 0, NULL, 0 }
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};
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int main(int argc, char **argv)
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{
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int err = 0;
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int id2 = 0, c;
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double yk = 0.0, temp; /* controller output */
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int target_tz_index;
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if (geteuid() != 0) {
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printf("TMON needs to be run as root\n");
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exit(EXIT_FAILURE);
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}
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while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
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switch (c) {
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case 'c':
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no_control = 0;
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strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
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break;
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case 'd':
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start_daemon_mode();
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printf("Run TMON in daemon mode\n");
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break;
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case 't':
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ticktime = strtod(optarg, NULL);
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if (ticktime < 1)
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ticktime = 1;
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break;
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case 'T':
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temp = strtod(optarg, NULL);
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if (temp < 0) {
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fprintf(stderr, "error: temperature must be positive\n");
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return 1;
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}
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target_temp_user = temp;
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break;
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case 'l':
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printf("Logging data to /var/tmp/tmon.log\n");
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logging = 1;
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break;
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case 'h':
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usage();
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break;
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case 'v':
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version();
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break;
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case 'g':
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debug_on = 1;
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break;
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case 'z':
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target_thermal_zone = strtod(optarg, NULL);
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break;
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default:
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break;
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}
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}
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if (pthread_mutex_init(&input_lock, NULL) != 0) {
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fprintf(stderr, "\n mutex init failed, exit\n");
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return 1;
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}
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start_syslog();
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if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
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syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
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if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
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syslog(LOG_DEBUG, "Cannot handle SIGTERM\n");
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if (probe_thermal_sysfs()) {
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pthread_mutex_destroy(&input_lock);
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closelog();
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return -1;
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}
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initialize_curses();
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setup_windows();
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signal(SIGWINCH, resize_handler);
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show_title_bar();
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show_sensors_w();
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show_cooling_device();
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update_thermal_data();
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show_data_w();
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prepare_logging();
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init_thermal_controller();
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nodelay(stdscr, TRUE);
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err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
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if (err != 0) {
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printf("\ncan't create thread :[%s]", strerror(err));
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tmon_cleanup();
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exit(EXIT_FAILURE);
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}
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/* validate range of user selected target zone, default to the first
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* instance if out of range
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*/
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target_tz_index = zone_instance_to_index(target_thermal_zone);
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if (target_tz_index < 0) {
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target_thermal_zone = ptdata.tzi[0].instance;
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syslog(LOG_ERR, "target zone is not found, default to %d\n",
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target_thermal_zone);
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}
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while (1) {
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sleep(ticktime);
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show_title_bar();
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show_sensors_w();
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update_thermal_data();
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if (!dialogue_on) {
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show_data_w();
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show_cooling_device();
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}
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time_elapsed += ticktime;
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controller_handler(trec[0].temp[target_tz_index] / 1000, &yk);
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trec[0].pid_out_pct = yk;
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if (!dialogue_on)
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show_control_w();
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if (tmon_exit)
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break;
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}
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tmon_cleanup();
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return 0;
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}
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static void start_daemon_mode(void)
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{
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daemon_mode = 1;
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/* fork */
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pid_t sid, pid = fork();
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if (pid < 0)
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exit(EXIT_FAILURE);
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else if (pid > 0)
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/* kill parent */
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exit(EXIT_SUCCESS);
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/* disable TUI, it may not be necessary, but saves some resource */
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disable_tui();
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/* change the file mode mask */
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umask(S_IWGRP | S_IWOTH);
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/* new SID for the daemon process */
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sid = setsid();
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if (sid < 0)
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exit(EXIT_FAILURE);
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/* change working directory */
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if ((chdir("/")) < 0)
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exit(EXIT_FAILURE);
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sleep(10);
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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}
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