brewco/brewco.c

/*****************************************************************************
 * Copyright (C) 2015
 *   
 * Michiel Broek <mbroek at mbse dot eu>
 *
 * 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 ThermFerm; see the file COPYING.  If not, write to the Free
 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *****************************************************************************/

#include "rdconfig.h"
#include "brewco.h"
#include "futil.h"
#include "xutil.h"


int			my_shutdown = FALSE;
extern int              debug;
extern sys_config       Config;
#ifdef HAVE_WIRINGPI_H
extern int              lcdHandle;
#endif


void help(void);
void die(int);


void help(void)
{
    fprintf(stdout, "mbsePi-apps brewco v%s starting\n\n", VERSION);
    fprintf(stdout, "Usage: brewco [-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;
	case SIGSEGV:   syslog(LOG_NOTICE, "Got SIGSEGV, shutting down");
			my_shutdown = TRUE;
			exit(SIGSEGV);
			break;
	default:        syslog(LOG_NOTICE, "die() on signal %d", onsig);
    }

    my_shutdown = TRUE;
}


int main(int argc, char *argv[])
{
    int		rc = 0, c, i;

    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("brewco", LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_USER);
    syslog(LOG_NOTICE, "mbsePi-apps brewco v%s starting", VERSION);
    if (debug)
	fprintf(stdout, "mbsePi-apps brewco v%s starting\n", VERSION);

    if (rdconfig()) {
	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 (Config.lcd_cols, Config.lcd_rows))) {
	fprintf(stderr, "Cannot initialize LCD display, rc=%d\n", rc);
	return 1;
    }
#endif


    syslog(LOG_NOTICE, "Finished, rc=%d", rc);
    return rc;
}