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