2 * tmon.c Thermal Monitor (TMON) main function and entry point
4 * Copyright (C) 2012 Intel Corporation. All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 or later as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * Author: Jacob Pan <jacob.jun.pan@linux.intel.com>
24 #include <sys/types.h>
39 unsigned long ticktime = 1; /* seconds */
40 unsigned long no_control = 1; /* monitoring only or use cooling device for
41 * temperature control.
43 double time_elapsed = 0.0;
44 unsigned long target_temp_user = 65; /* can be select by tui later */
47 static short daemon_mode;
48 static int logging; /* for recording thermal data to a file */
51 /*cooling device used for the PID controller */
52 char ctrl_cdev[CDEV_NAME_SIZE] = "None";
53 int target_thermal_zone; /* user selected target zone instance */
54 static void start_daemon_mode(void);
57 pthread_mutex_t input_lock;
60 printf("Usage: tmon [OPTION...]\n");
61 printf(" -c, --control cooling device in control\n");
62 printf(" -d, --daemon run as daemon, no TUI\n");
63 printf(" -g, --debug debug message in syslog\n");
64 printf(" -h, --help show this help message\n");
65 printf(" -l, --log log data to /var/tmp/tmon.log\n");
66 printf(" -t, --time-interval sampling time interval, > 1 sec.\n");
67 printf(" -v, --version show version\n");
68 printf(" -z, --zone target thermal zone id\n");
75 printf("TMON version %s\n", VERSION);
79 static void tmon_cleanup(void)
82 syslog(LOG_INFO, "TMON exit cleanup\n");
88 pthread_mutex_lock(&input_lock);
89 pthread_cancel(event_tid);
90 pthread_mutex_unlock(&input_lock);
91 pthread_mutex_destroy(&input_lock);
94 /* relax control knobs, undo throttling */
97 keypad(stdscr, FALSE);
108 static void tmon_sig_handler(int sig)
110 syslog(LOG_INFO, "TMON caught signal %d\n", sig);
114 printf("sigterm, exit and clean up\n");
118 printf("sigkill, exit and clean up\n");
122 printf("ctrl-c, exit and clean up\n");
132 static void start_syslog(void)
135 setlogmask(LOG_UPTO(LOG_DEBUG));
137 setlogmask(LOG_UPTO(LOG_ERR));
138 openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
139 syslog(LOG_NOTICE, "TMON started by User %d", getuid());
142 static void prepare_logging(void)
149 /* open local data log file */
150 tmon_log = fopen(TMON_LOG_FILE, "w+");
152 syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
156 if (lstat(TMON_LOG_FILE, &logstat) < 0) {
157 syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
163 /* The log file must be a regular file owned by us */
164 if (S_ISLNK(logstat.st_mode)) {
165 syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
171 if (logstat.st_uid != getuid()) {
172 syslog(LOG_ERR, "We don't own the log file. Not logging\n");
179 fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
180 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
181 char binding_str[33]; /* size of long + 1 */
184 memset(binding_str, 0, sizeof(binding_str));
185 for (j = 0; j < 32; j++)
186 binding_str[j] = (ptdata.tzi[i].cdev_binding & 1<<j) ?
189 fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
191 ptdata.tzi[i].instance,
193 for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
194 fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
195 trip_type_name[ptdata.tzi[i].tp[j].type],
196 ptdata.tzi[i].tp[j].temp);
201 for (i = 0; i < ptdata.nr_cooling_dev; i++)
202 fprintf(tmon_log, "#cooling devices%02d: %s\n",
203 i, ptdata.cdi[i].type);
205 fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
206 fprintf(tmon_log, "Samples TargetTemp ");
207 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
208 fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
209 ptdata.tzi[i].instance);
211 for (i = 0; i < ptdata.nr_cooling_dev; i++)
212 fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
213 ptdata.cdi[i].instance);
215 fprintf(tmon_log, "\n");
218 static struct option opts[] = {
219 { "control", 1, NULL, 'c' },
220 { "daemon", 0, NULL, 'd' },
221 { "time-interval", 1, NULL, 't' },
222 { "log", 0, NULL, 'l' },
223 { "help", 0, NULL, 'h' },
224 { "version", 0, NULL, 'v' },
225 { "debug", 0, NULL, 'g' },
230 int main(int argc, char **argv)
234 double yk = 0.0; /* controller output */
237 if (geteuid() != 0) {
238 printf("TMON needs to be run as root\n");
242 while ((c = getopt_long(argc, argv, "c:dlht:vgz:", opts, &id2)) != -1) {
246 strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
250 printf("Run TMON in daemon mode\n");
253 ticktime = strtod(optarg, NULL);
258 printf("Logging data to /var/tmp/tmon.log\n");
271 target_thermal_zone = strtod(optarg, NULL);
277 if (pthread_mutex_init(&input_lock, NULL) != 0) {
278 fprintf(stderr, "\n mutex init failed, exit\n");
282 if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
283 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
284 if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
285 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
287 if (probe_thermal_sysfs()) {
288 pthread_mutex_destroy(&input_lock);
294 signal(SIGWINCH, resize_handler);
297 show_cooling_device();
298 update_thermal_data();
301 init_thermal_controller();
303 nodelay(stdscr, TRUE);
304 err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
306 printf("\ncan't create thread :[%s]", strerror(err));
311 /* validate range of user selected target zone, default to the first
312 * instance if out of range
314 target_tz_index = zone_instance_to_index(target_thermal_zone);
315 if (target_tz_index < 0) {
316 target_thermal_zone = ptdata.tzi[0].instance;
317 syslog(LOG_ERR, "target zone is not found, default to %d\n",
318 target_thermal_zone);
324 update_thermal_data();
327 show_cooling_device();
329 cur_thermal_record++;
330 time_elapsed += ticktime;
331 controller_handler(trec[0].temp[target_tz_index] / 1000,
333 trec[0].pid_out_pct = yk;
343 static void start_daemon_mode()
347 pid_t sid, pid = fork();
354 /* disable TUI, it may not be necessary, but saves some resource */
357 /* change the file mode mask */
358 umask(S_IWGRP | S_IWOTH);
360 /* new SID for the daemon process */
365 /* change working directory */
366 if ((chdir("/")) < 0)
373 close(STDOUT_FILENO);
374 close(STDERR_FILENO);