diff -r 44566f986f76 -r ee8f851b4d93 thermometers/thermometers.c --- a/thermometers/thermometers.c Thu Sep 17 20:54:34 2015 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,317 +0,0 @@ -/***************************************************************************** - * Copyright (C) 2014 - * - * Michiel Broek - * - * This file is part of the mbsePi-apps - * - * This is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2, or (at your option) any - * later version. - * - * mbsePi-apps is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with EC-65K; see the file COPYING. If not, write to the Free - * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - *****************************************************************************/ - -#include "thermometers.h" - - -static int my_shutdown = FALSE; -static pid_t pgrp, mypid; - -extern int debug; -extern sys_config Config; -#ifdef HAVE_WIRINGPI_H -extern int lcdHandle; -#endif - -int server(void); -void help(void); -void die(int); - - -void help(void) -{ - fprintf(stdout, "mbsePi-apps thermometers v%s starting\n\n", VERSION); - fprintf(stdout, "Usage: thermomeneters [-d] [-h]\n"); - fprintf(stdout, " -d --debug Debug and run in foreground\n"); - fprintf(stdout, " -h --help Display this help\n"); -} - - - -void die(int onsig) -{ - switch (onsig) { - case SIGHUP: syslog(LOG_NOTICE, "Got SIGHUP, shutting down"); - break; - case SIGINT: syslog(LOG_NOTICE, "Keyboard interrupt, shutting down"); - break; - case SIGTERM: syslog(LOG_NOTICE, "Got SIGTERM, shutting down"); - break; - default: syslog(LOG_NOTICE, "die() on signal %d", onsig); - } - - my_shutdown = TRUE; -} - - - -#ifdef HAVE_WIRINGPI_H -void stopLCD(void) -{ - lcdClear(lcdHandle); - setBacklight(0); -} -#endif - - - -int main(int argc, char *argv[]) -{ - int rc, c, i; - pid_t frk; -#ifdef HAVE_WIRINGPI_H - char buf[80]; -#endif - - while (1) { - int option_index = 0; - static struct option long_options[] = { - {"debug", 0, 0, 'c'}, - {"help", 0, 0, 'h'}, - {0, 0, 0, 0} - }; - - c = getopt_long(argc, argv, "dh", long_options, &option_index); - if (c == -1) - break; - - switch (c) { - case 'd': debug = TRUE; - break; - case 'h': help(); - return 1; - } - } - - openlog("thermometers", LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_USER); - syslog(LOG_NOTICE, "mbsePi-apps thermometers v%s starting", VERSION); - if (debug) - fprintf(stdout, "mbsePi-apps thermometers v%s starting\n", VERSION); - - if (rdconfig((char *)"thermometers.conf")) { - fprintf(stderr, "Error reading configuration\n"); - syslog(LOG_NOTICE, "Error reading configuration, halted"); - return 1; - } - - /* - * Catch all the signals we can, and ignore the rest. Note that SIGKILL can't be ignored - * but that's live. This daemon should only be stopped by SIGTERM. - * Don't catch SIGCHLD. - */ - for (i = 0; i < NSIG; i++) { - if ((i != SIGCHLD) && (i != SIGKILL) && (i != SIGSTOP)) - signal(i, (void (*))die); - } - -#ifdef HAVE_WIRINGPI_H - - if (wiringPiSetup () ) - return 1; - - if ((rc = initLCD (16, 2))) { - fprintf(stderr, "Cannot initialize LCD display, rc=%d\n", rc); - return 1; - } - - lcdPosition(lcdHandle, 0, 0); - lcdPuts(lcdHandle, "Thermometers"); - lcdPosition(lcdHandle, 0, 1); - sprintf(buf, "Version %s", VERSION); - lcdPuts(lcdHandle, buf); -#endif - - if (debug) { - /* - * For debugging run in foreground. - */ - rc = server(); - } else { - /* - * Server initialization is complete. Now we can fork the - * daemon and return to the user. We need to do a setpgrp - * so that the daemon will no longer be assosiated with the - * users control terminal. This is done before the fork, so - * that the child will not be a process group leader. Otherwise, - * if the child were to open a terminal, it would become - * associated with that terminal as its control terminal. - */ - if ((pgrp = setpgid(0, 0)) == -1) { - syslog(LOG_NOTICE, "setpgpid failed"); - } - - frk = fork(); - switch (frk) { - case -1: - syslog(LOG_NOTICE, "Daemon fork failed: %s", strerror(errno)); - syslog(LOG_NOTICE, "Finished, rc=1"); -#ifdef HAVE_WIRINGPI_H - stopLCD(); -#endif - exit(1); - case 0: /* - * Run the daemon - */ - fclose(stdin); - if (open("/dev/null", O_RDONLY) != 0) { - syslog(LOG_NOTICE, "Reopen of stdin to /dev/null failed"); - _exit(2); - } - fclose(stdout); - if (open("/dev/null", O_WRONLY | O_APPEND | O_CREAT,0600) != 1) { - syslog(LOG_NOTICE, "Reopen of stdout to /dev/null failed"); - _exit(2); - } - fclose(stderr); - if (open("/dev/null", O_WRONLY | O_APPEND | O_CREAT,0600) != 2) { - syslog(LOG_NOTICE, "Reopen of stderr to /dev/null failed"); - _exit(2); - } - mypid = getpid(); - rc = server(); - break; - /* Not reached */ - default: - /* - * Here we detach this process and let the child - * run the deamon process. - */ - syslog(LOG_NOTICE, "Starting daemon with pid %d", frk); - exit(0); - } - } - - syslog(LOG_NOTICE, "Finished, rc=%d", rc); - return rc; -} - - - -int server(void) -{ - int temp, rc = 0; -#ifdef HAVE_WIRINGPI_H - char buf[1024]; - int lcdupdate; -#endif - w1_therm *tmp1; - char *device, line[60], *p = NULL; - FILE *fp; - - if (debug) - fprintf(stdout, (char *)"Enter loop\n"); - - do { -#ifdef HAVE_WIRINGPI_H - lcdupdate = FALSE; -#endif - - /* - * Here send our 1-wire sensors values - */ - for (tmp1 = Config.w1therms; tmp1; tmp1 = tmp1->next) { - - /* - * Build path and alias topic - */ - device = xstrcpy((char *)"/sys/bus/w1/devices/"); - device = xstrcat(device, tmp1->master); - device = xstrcat(device, (char *)"/"); - device = xstrcat(device, tmp1->name); - device = xstrcat(device, (char *)"/w1_slave"); - - /* - * Read sensor data - */ - if ((fp = fopen(device, "r"))) { - /* - * The output looks like: - * 72 01 4b 46 7f ff 0e 10 57 : crc=57 YES - * 72 01 4b 46 7f ff 0e 10 57 t=23125 - */ - fgets(line, 50, fp); - line[strlen(line)-1] = '\0'; - if ((line[36] == 'Y') && (line[37] == 'E')) { - /* - * CRC is Ok, continue - */ - fgets(line, 50, fp); - line[strlen(line)-1] = '\0'; - strtok(line, (char *)"="); - p = strtok(NULL, (char *)"="); - rc = sscanf(p, "%d", &temp); - if ((rc == 1) && (tmp1->lastval != temp)) { - tmp1->lastval = temp; -#ifdef HAVE_WIRINGPI_H - lcdupdate = TRUE; -#endif - } - } else { - syslog(LOG_NOTICE, "sensor %s/%s CRC error", tmp1->master, tmp1->name); - } - fclose(fp); - tmp1->present = 1; - } else { - tmp1->present = 0; - if (debug) - printf("sensor %s is missing\n", tmp1->name); - } - - free(device); - device = NULL; - } - -#ifdef HAVE_WIRINGPI_H - if (lcdupdate) { - lcdPosition(lcdHandle, 0, 0); - tmp1 = Config.w1therms; - snprintf(buf, 16, "%5.1f %cC %s ", tmp1->lastval / 1000.0, 0xdf, tmp1->alias); - lcdPuts(lcdHandle, buf); - tmp1 = tmp1->next; - lcdPosition(lcdHandle, 0, 1); - snprintf(buf, 16, "%5.1f %cC %s ", tmp1->lastval / 1000.0, 0xdf, tmp1->alias); - lcdPuts(lcdHandle, buf); - } -#endif - - if (my_shutdown) { -#ifdef HAVE_WIRINGPI_H - lcdClear(lcdHandle); - lcdPosition(lcdHandle, 0, 0); - lcdPuts(lcdHandle, "Shuting down ..."); -#endif - } - - usleep(100000); - - } while (! my_shutdown); - - if (debug) - fprintf(stdout, (char *)"Out of loop\n"); - -#ifdef HAVE_WIRINGPI_H - stopLCD(); -#endif - - return rc; -} -