1 /*
2 * tmon.c Thermal Monitor (TMON) main function and entry point
3 *
4 * Copyright (C) 2012 Intel Corporation. All rights reserved.
5 *
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.
9 *
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.
14 *
15 * Author: Jacob Pan <jacob.jun.pan@linux.intel.com>
16 *
17 */
18
19 #include <getopt.h>
20 #include <unistd.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <ncurses.h>
27 #include <ctype.h>
28 #include <time.h>
29 #include <signal.h>
30 #include <limits.h>
31 #include <sys/time.h>
32 #include <pthread.h>
33 #include <math.h>
34 #include <stdarg.h>
35 #include <syslog.h>
36
37 #include "tmon.h"
38
39 unsigned long ticktime = 1; /* seconds */
40 unsigned long no_control = 1; /* monitoring only or use cooling device for
41 * temperature control.
42 */
43 double time_elapsed = 0.0;
44 unsigned long target_temp_user = 65; /* can be select by tui later */
45 int dialogue_on;
46 int tmon_exit;
47 static short daemon_mode;
48 static int logging; /* for recording thermal data to a file */
49 static int debug_on;
50 FILE *tmon_log;
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);
55
56 pthread_t event_tid;
57 pthread_mutex_t input_lock;
usage()58 void usage()
59 {
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(" -T, --target-temp initial target temperature\n");
68 printf(" -v, --version show version\n");
69 printf(" -z, --zone target thermal zone id\n");
70
71 exit(0);
72 }
73
version()74 void version()
75 {
76 printf("TMON version %s\n", VERSION);
77 exit(EXIT_SUCCESS);
78 }
79
tmon_cleanup(void)80 static void tmon_cleanup(void)
81 {
82
83 syslog(LOG_INFO, "TMON exit cleanup\n");
84 fflush(stdout);
85 refresh();
86 if (tmon_log)
87 fclose(tmon_log);
88 if (event_tid) {
89 pthread_mutex_lock(&input_lock);
90 pthread_cancel(event_tid);
91 pthread_mutex_unlock(&input_lock);
92 pthread_mutex_destroy(&input_lock);
93 }
94 closelog();
95 /* relax control knobs, undo throttling */
96 set_ctrl_state(0);
97
98 keypad(stdscr, FALSE);
99 echo();
100 nocbreak();
101 close_windows();
102 endwin();
103 free_thermal_data();
104
105 exit(1);
106 }
107
108
tmon_sig_handler(int sig)109 static void tmon_sig_handler(int sig)
110 {
111 syslog(LOG_INFO, "TMON caught signal %d\n", sig);
112 refresh();
113 switch (sig) {
114 case SIGTERM:
115 printf("sigterm, exit and clean up\n");
116 fflush(stdout);
117 break;
118 case SIGKILL:
119 printf("sigkill, exit and clean up\n");
120 fflush(stdout);
121 break;
122 case SIGINT:
123 printf("ctrl-c, exit and clean up\n");
124 fflush(stdout);
125 break;
126 default:
127 break;
128 }
129 tmon_exit = true;
130 }
131
132
start_syslog(void)133 static void start_syslog(void)
134 {
135 if (debug_on)
136 setlogmask(LOG_UPTO(LOG_DEBUG));
137 else
138 setlogmask(LOG_UPTO(LOG_ERR));
139 openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
140 syslog(LOG_NOTICE, "TMON started by User %d", getuid());
141 }
142
prepare_logging(void)143 static void prepare_logging(void)
144 {
145 int i;
146 struct stat logstat;
147
148 if (!logging)
149 return;
150 /* open local data log file */
151 tmon_log = fopen(TMON_LOG_FILE, "w+");
152 if (!tmon_log) {
153 syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
154 return;
155 }
156
157 if (lstat(TMON_LOG_FILE, &logstat) < 0) {
158 syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
159 fclose(tmon_log);
160 tmon_log = NULL;
161 return;
162 }
163
164 /* The log file must be a regular file owned by us */
165 if (S_ISLNK(logstat.st_mode)) {
166 syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
167 fclose(tmon_log);
168 tmon_log = NULL;
169 return;
170 }
171
172 if (logstat.st_uid != getuid()) {
173 syslog(LOG_ERR, "We don't own the log file. Not logging\n");
174 fclose(tmon_log);
175 tmon_log = NULL;
176 return;
177 }
178
179
180 fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
181 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
182 char binding_str[33]; /* size of long + 1 */
183 int j;
184
185 memset(binding_str, 0, sizeof(binding_str));
186 for (j = 0; j < 32; j++)
187 binding_str[j] = (ptdata.tzi[i].cdev_binding & 1<<j) ?
188 '1' : '0';
189
190 fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
191 ptdata.tzi[i].type,
192 ptdata.tzi[i].instance,
193 binding_str);
194 for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
195 fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
196 trip_type_name[ptdata.tzi[i].tp[j].type],
197 ptdata.tzi[i].tp[j].temp);
198 }
199
200 }
201
202 for (i = 0; i < ptdata.nr_cooling_dev; i++)
203 fprintf(tmon_log, "#cooling devices%02d: %s\n",
204 i, ptdata.cdi[i].type);
205
206 fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
207 fprintf(tmon_log, "Samples TargetTemp ");
208 for (i = 0; i < ptdata.nr_tz_sensor; i++) {
209 fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
210 ptdata.tzi[i].instance);
211 }
212 for (i = 0; i < ptdata.nr_cooling_dev; i++)
213 fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
214 ptdata.cdi[i].instance);
215
216 fprintf(tmon_log, "\n");
217 }
218
219 static struct option opts[] = {
220 { "control", 1, NULL, 'c' },
221 { "daemon", 0, NULL, 'd' },
222 { "time-interval", 1, NULL, 't' },
223 { "target-temp", 1, NULL, 'T' },
224 { "log", 0, NULL, 'l' },
225 { "help", 0, NULL, 'h' },
226 { "version", 0, NULL, 'v' },
227 { "debug", 0, NULL, 'g' },
228 { 0, 0, NULL, 0 }
229 };
230
231
main(int argc,char ** argv)232 int main(int argc, char **argv)
233 {
234 int err = 0;
235 int id2 = 0, c;
236 double yk = 0.0, temp; /* controller output */
237 int target_tz_index;
238
239 if (geteuid() != 0) {
240 printf("TMON needs to be run as root\n");
241 exit(EXIT_FAILURE);
242 }
243
244 while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
245 switch (c) {
246 case 'c':
247 no_control = 0;
248 strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
249 break;
250 case 'd':
251 start_daemon_mode();
252 printf("Run TMON in daemon mode\n");
253 break;
254 case 't':
255 ticktime = strtod(optarg, NULL);
256 if (ticktime < 1)
257 ticktime = 1;
258 break;
259 case 'T':
260 temp = strtod(optarg, NULL);
261 if (temp < 0) {
262 fprintf(stderr, "error: temperature must be positive\n");
263 return 1;
264 }
265 target_temp_user = temp;
266 break;
267 case 'l':
268 printf("Logging data to /var/tmp/tmon.log\n");
269 logging = 1;
270 break;
271 case 'h':
272 usage();
273 break;
274 case 'v':
275 version();
276 break;
277 case 'g':
278 debug_on = 1;
279 break;
280 case 'z':
281 target_thermal_zone = strtod(optarg, NULL);
282 break;
283 default:
284 break;
285 }
286 }
287 if (pthread_mutex_init(&input_lock, NULL) != 0) {
288 fprintf(stderr, "\n mutex init failed, exit\n");
289 return 1;
290 }
291 start_syslog();
292 if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
293 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
294 if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
295 syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
296
297 if (probe_thermal_sysfs()) {
298 pthread_mutex_destroy(&input_lock);
299 closelog();
300 return -1;
301 }
302 initialize_curses();
303 setup_windows();
304 signal(SIGWINCH, resize_handler);
305 show_title_bar();
306 show_sensors_w();
307 show_cooling_device();
308 update_thermal_data();
309 show_data_w();
310 prepare_logging();
311 init_thermal_controller();
312
313 nodelay(stdscr, TRUE);
314 err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
315 if (err != 0) {
316 printf("\ncan't create thread :[%s]", strerror(err));
317 tmon_cleanup();
318 exit(EXIT_FAILURE);
319 }
320
321 /* validate range of user selected target zone, default to the first
322 * instance if out of range
323 */
324 target_tz_index = zone_instance_to_index(target_thermal_zone);
325 if (target_tz_index < 0) {
326 target_thermal_zone = ptdata.tzi[0].instance;
327 syslog(LOG_ERR, "target zone is not found, default to %d\n",
328 target_thermal_zone);
329 }
330 while (1) {
331 sleep(ticktime);
332 show_title_bar();
333 show_sensors_w();
334 update_thermal_data();
335 if (!dialogue_on) {
336 show_data_w();
337 show_cooling_device();
338 }
339 time_elapsed += ticktime;
340 controller_handler(trec[0].temp[target_tz_index] / 1000,
341 &yk);
342 trec[0].pid_out_pct = yk;
343 if (!dialogue_on)
344 show_control_w();
345 if (tmon_exit)
346 break;
347 }
348 tmon_cleanup();
349 return 0;
350 }
351
start_daemon_mode()352 static void start_daemon_mode()
353 {
354 daemon_mode = 1;
355 /* fork */
356 pid_t sid, pid = fork();
357 if (pid < 0) {
358 exit(EXIT_FAILURE);
359 } else if (pid > 0)
360 /* kill parent */
361 exit(EXIT_SUCCESS);
362
363 /* disable TUI, it may not be necessary, but saves some resource */
364 disable_tui();
365
366 /* change the file mode mask */
367 umask(S_IWGRP | S_IWOTH);
368
369 /* new SID for the daemon process */
370 sid = setsid();
371 if (sid < 0)
372 exit(EXIT_FAILURE);
373
374 /* change working directory */
375 if ((chdir("/")) < 0)
376 exit(EXIT_FAILURE);
377
378
379 sleep(10);
380
381 close(STDIN_FILENO);
382 close(STDOUT_FILENO);
383 close(STDERR_FILENO);
384
385 }
386