Mercurial > mbsePi-apps / file comparison
comparison: coolers/coolers.c
coolers/coolers.c
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| 1 /***************************************************************************** | |
| 2 * Copyright (C) 2014 | |
| 3 * | |
| 4 * Michiel Broek <mbroek at mbse dot eu> | |
| 5 * | |
| 6 * This file is part of the mbsePi-apps | |
| 7 * | |
| 8 * This is free software; you can redistribute it and/or modify it | |
| 9 * under the terms of the GNU General Public License as published by the | |
| 10 * Free Software Foundation; either version 2, or (at your option) any | |
| 11 * later version. | |
| 12 * | |
| 13 * mbsePi-apps is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU General Public License | |
| 19 * along with EC-65K; see the file COPYING. If not, write to the Free | |
| 20 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
| 21 *****************************************************************************/ | |
| 22 | |
| 23 #include "../lib/mbselib.h" | |
| 24 #include "coolers.h" | |
| 25 #include "mosquitto.h" | |
| 26 #include "sensors.h" | |
| 27 | |
| 28 #ifdef HAVE_WIRINGPI_H | |
| 29 | |
| 30 | |
| 31 bool shutdown = false; | |
| 32 static pid_t pgrp, mypid; | |
| 33 | |
| 34 extern bool debug; | |
| 35 extern sys_config Config; | |
| 36 extern int lcdHandle; | |
| 37 int lcdupdate; | |
| 38 | |
| 39 int server(void); | |
| 40 void help(void); | |
| 41 void die(int); | |
| 42 | |
| 43 | |
| 44 void help(void) | |
| 45 { | |
| 46 fprintf(stdout, "mbsePi-apps coolers v%s starting\n\n", VERSION); | |
| 47 fprintf(stdout, "Usage: coolers [-d] [-h]\n"); | |
| 48 fprintf(stdout, " -d --debug Debug and run in foreground\n"); | |
| 49 fprintf(stdout, " -h --help Display this help\n"); | |
| 50 } | |
| 51 | |
| 52 | |
| 53 | |
| 54 void die(int onsig) | |
| 55 { | |
| 56 switch (onsig) { | |
| 57 case SIGHUP: syslog(LOG_NOTICE, "Got SIGHUP, shutting down"); | |
| 58 break; | |
| 59 case SIGINT: syslog(LOG_NOTICE, "Keyboard interrupt, shutting down"); | |
| 60 break; | |
| 61 case SIGTERM: syslog(LOG_NOTICE, "Got SIGTERM, shutting down"); | |
| 62 break; | |
| 63 default: syslog(LOG_NOTICE, "die() on signal %d", onsig); | |
| 64 } | |
| 65 | |
| 66 shutdown = true; | |
| 67 } | |
| 68 | |
| 69 | |
| 70 | |
| 71 void stopLCD(void) | |
| 72 { | |
| 73 lcdClear(lcdHandle); | |
| 74 setBacklight(0); | |
| 75 } | |
| 76 | |
| 77 | |
| 78 | |
| 79 int main(int argc, char *argv[]) | |
| 80 { | |
| 81 int rc, c, i; | |
| 82 pid_t frk; | |
| 83 char buf[80]; | |
| 84 | |
| 85 while (1) { | |
| 86 int option_index = 0; | |
| 87 static struct option long_options[] = { | |
| 88 {"debug", 0, 0, 'c'}, | |
| 89 {"help", 0, 0, 'h'}, | |
| 90 {0, 0, 0, 0} | |
| 91 }; | |
| 92 | |
| 93 c = getopt_long(argc, argv, "dh", long_options, &option_index); | |
| 94 if (c == -1) | |
| 95 break; | |
| 96 | |
| 97 switch (c) { | |
| 98 case 'd': debug = true; | |
| 99 break; | |
| 100 case 'h': help(); | |
| 101 return 1; | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 openlog("coolers", LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_USER); | |
| 106 syslog(LOG_NOTICE, "mbsePi-apps coolers v%s starting", VERSION); | |
| 107 if (debug) | |
| 108 fprintf(stdout, "mbsePi-apps coolers v%s starting\n", VERSION); | |
| 109 | |
| 110 if (rdconfig((char *)"coolers.conf")) { | |
| 111 fprintf(stderr, "Error reading configuration\n"); | |
| 112 syslog(LOG_NOTICE, "halted"); | |
| 113 return 1; | |
| 114 } | |
| 115 | |
| 116 /* | |
| 117 * Catch all the signals we can, and ignore the rest. Note that SIGKILL can't be ignored | |
| 118 * but that's live. This daemon should only be stopped by SIGTERM. | |
| 119 * Don't catch SIGCHLD. | |
| 120 */ | |
| 121 for (i = 0; i < NSIG; i++) { | |
| 122 if ((i != SIGCHLD) && (i != SIGKILL) && (i != SIGSTOP)) | |
| 123 signal(i, (void (*))die); | |
| 124 } | |
| 125 | |
| 126 if ((rc = initLCD (16, 2))) { | |
| 127 fprintf(stderr, "Cannot initialize LCD display, rc=%d\n", rc); | |
| 128 return 1; | |
| 129 } | |
| 130 | |
| 131 lcdPosition(lcdHandle, 0, 0); | |
| 132 lcdPuts(lcdHandle, "Coolers"); | |
| 133 lcdPosition(lcdHandle, 0, 1); | |
| 134 sprintf(buf, "Version %s", VERSION); | |
| 135 lcdPuts(lcdHandle, buf); | |
| 136 | |
| 137 if (debug) { | |
| 138 /* | |
| 139 * For debugging run in foreground. | |
| 140 */ | |
| 141 rc = server(); | |
| 142 } else { | |
| 143 /* | |
| 144 * Server initialization is complete. Now we can fork the | |
| 145 * daemon and return to the user. We need to do a setpgrp | |
| 146 * so that the daemon will no longer be assosiated with the | |
| 147 * users control terminal. This is done before the fork, so | |
| 148 * that the child will not be a process group leader. Otherwise, | |
| 149 * if the child were to open a terminal, it would become | |
| 150 * associated with that terminal as its control terminal. | |
| 151 */ | |
| 152 if ((pgrp = setpgid(0, 0)) == -1) { | |
| 153 syslog(LOG_NOTICE, "setpgpid failed"); | |
| 154 } | |
| 155 | |
| 156 frk = fork(); | |
| 157 switch (frk) { | |
| 158 case -1: | |
| 159 syslog(LOG_NOTICE, "Daemon fork failed: %s", strerror(errno)); | |
| 160 syslog(LOG_NOTICE, "Finished, rc=1"); | |
| 161 stopLCD(); | |
| 162 exit(1); | |
| 163 case 0: /* | |
| 164 * Run the daemon | |
| 165 */ | |
| 166 fclose(stdin); | |
| 167 if (open("/dev/null", O_RDONLY) != 0) { | |
| 168 syslog(LOG_NOTICE, "Reopen of stdin to /dev/null failed"); | |
| 169 _exit(2); | |
| 170 } | |
| 171 fclose(stdout); | |
| 172 if (open("/dev/null", O_WRONLY | O_APPEND | O_CREAT,0600) != 1) { | |
| 173 syslog(LOG_NOTICE, "Reopen of stdout to /dev/null failed"); | |
| 174 _exit(2); | |
| 175 } | |
| 176 fclose(stderr); | |
| 177 if (open("/dev/null", O_WRONLY | O_APPEND | O_CREAT,0600) != 2) { | |
| 178 syslog(LOG_NOTICE, "Reopen of stderr to /dev/null failed"); | |
| 179 _exit(2); | |
| 180 } | |
| 181 mypid = getpid(); | |
| 182 rc = server(); | |
| 183 break; | |
| 184 /* Not reached */ | |
| 185 default: | |
| 186 /* | |
| 187 * Here we detach this process and let the child | |
| 188 * run the deamon process. | |
| 189 */ | |
| 190 syslog(LOG_NOTICE, "Starting daemon with pid %d", frk); | |
| 191 exit(0); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 syslog(LOG_NOTICE, "Finished, rc=%d", rc); | |
| 196 return rc; | |
| 197 } | |
| 198 | |
| 199 | |
| 200 | |
| 201 int server(void) | |
| 202 { | |
| 203 char buf[1024]; | |
| 204 w1_therm *tmp1, *old1; | |
| 205 int run = 0; | |
| 206 | |
| 207 my_mosquitto_init(); | |
| 208 | |
| 209 do { | |
| 210 lcdupdate = FALSE; | |
| 211 | |
| 212 my_sensors_loop(); | |
| 213 run = my_mosquitto_loop(); | |
| 214 | |
| 215 if (run && lcdupdate) { | |
| 216 lcdPosition(lcdHandle, 0, 0); | |
| 217 tmp1 = Config.w1therms; | |
| 218 snprintf(buf, 16, "%4.1f %cC %c %s ", tmp1->lastval / 1000.0, 0xdf, ' ', tmp1->alias); | |
| 219 lcdPuts(lcdHandle, buf); | |
| 220 old1 = tmp1->next; | |
| 221 tmp1 = old1; | |
| 222 lcdPosition(lcdHandle, 0, 1); | |
| 223 snprintf(buf, 16, "%4.1f %cC %c %s ", tmp1->lastval / 1000.0, 0xdf, ' ', tmp1->alias); | |
| 224 lcdPuts(lcdHandle, buf); | |
| 225 } | |
| 226 | |
| 227 } while (run); | |
| 228 | |
| 229 if (debug) | |
| 230 fprintf(stdout, (char *)"Out of loop\n"); | |
| 231 | |
| 232 my_mosquitto_exit(); | |
| 233 stopLCD(); | |
| 234 | |
| 235 return 0; | |
| 236 } | |
| 237 | |
| 238 #else | |
| 239 | |
| 240 | |
| 241 int main(int argc, char *argv[]) | |
| 242 { | |
| 243 fprintf(stderr, "Compiled on a system without a wiringPi library.\n"); | |
| 244 fprintf(stderr, "This program is useless and will do nothing.\n"); | |
| 245 return 0; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 #endif |
