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# Channel table for Jacaraú - PB - Brazil
# Source: http://www.portalbsd.com.br/terrestres_channels.php?channels=2540

# Physical channel 20
[TV Cabo Branco]
	DELIVERY_SYSTEM = ISDBT
	BANDWIDTH_HZ = 6000000
	FREQUENCY = 509142857
	INVERSION = AUTO
	GUARD_INTERVAL = AUTO
	TRANSMISSION_MODE = AUTO
	INVERSION = AUTO
	GUARD_INTERVAL = AUTO
	TRANSMISSION_MODE = AUTO
	ISDBT_LAYER_ENABLED = 7
	ISDBT_SOUND_BROADCASTING = 0
	ISDBT_SB_SUBCHANNEL_ID = 0
	ISDBT_SB_SEGMENT_IDX = 0
	ISDBT_SB_SEGMENT_COUNT = 0
	ISDBT_LAYERA_FEC = AUTO
	ISDBT_LAYERA_MODULATION = QAM/AUTO
	ISDBT_LAYERA_SEGMENT_COUNT = 0
	ISDBT_LAYERA_TIME_INTERLEAVING = 0
	ISDBT_LAYERB_FEC = AUTO
	ISDBT_LAYERB_MODULATION = QAM/AUTO
	ISDBT_LAYERB_SEGMENT_COUNT = 0
	ISDBT_LAYERB_TIME_INTERLEAVING = 0
	ISDBT_LAYERC_FEC = AUTO
	ISDBT_LAYERC_MODULATION = QAM/AUTO
	ISDBT_LAYERC_SEGMENT_COUNT = 0
	ISDBT_LAYERC_TIME_INTERLEAVING = 0

# Physical channel 47
[Rede Vida]
	DELIVERY_SYSTEM = ISDBT
	BANDWIDTH_HZ = 6000000
	FREQUENCY = 671142857
	INVERSION = AUTO
	GUARD_INTERVAL = AUTO
	TRANSMISSION_MODE = AUTO
	INVERSION = AUTO
	GUARD_INTERVAL = AUTO
	TRANSMISSION_MODE = AUTO
	ISDBT_LAYER_ENABLED = 7
	ISDBT_SOUND_BROADCASTING = 0
	ISDBT_SB_SUBCHANNEL_ID = 0
	ISDBT_SB_SEGMENT_IDX = 0
	ISDBT_SB_SEGMENT_COUNT = 0
	ISDBT_LAYERA_FEC = AUTO
	ISDBT_LAYERA_MODULATION = QAM/AUTO
	ISDBT_LAYERA_SEGMENT_COUNT = 0
	ISDBT_LAYERA_TIME_INTERLEAVING = 0
	ISDBT_LAYERB_FEC = AUTO
	ISDBT_LAYERB_MODULATION = QAM/AUTO
	ISDBT_LAYERB_SEGMENT_COUNT = 0
	ISDBT_LAYERB_TIME_INTERLEAVING = 0
	ISDBT_LAYERC_FEC = AUTO
	ISDBT_LAYERC_MODULATION = QAM/AUTO
	ISDBT_LAYERC_SEGMENT_COUNT = 0
	ISDBT_LAYERC_TIME_INTERLEAVING = 0
287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
/* $Id: lcd4linux.c,v 1.79 2005/09/02 05:27:08 reinelt Exp $
 *
 * LCD4Linux
 *
 * Copyright (C) 1999, 2000, 2001, 2002, 2003 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux 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.
 *
 * LCD4Linux 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * $Log: lcd4linux.c,v $
 * Revision 1.79  2005/09/02 05:27:08  reinelt
 * double-fork daemonize patch from Petri Damsten
 *
 * Revision 1.78  2005/05/08 04:32:44  reinelt
 * CodingStyle added and applied
 *
 * Revision 1.77  2005/03/30 04:57:50  reinelt
 * Evaluator speedup: use bsearch for finding functions and variables
 *
 * Revision 1.76  2005/01/18 06:30:23  reinelt
 * added (C) to all copyright statements
 *
 * Revision 1.75  2004/09/24 21:41:00  reinelt
 * new driver for the BWCT USB LCD interface board.
 *
 * Revision 1.74  2004/06/26 12:04:59  reinelt
 *
 * uh-oh... the last CVS log message messed up things a lot...
 *
 * Revision 1.73  2004/06/26 09:27:21  reinelt
 *
 * added '-W' to CFLAGS
 * changed all C++ comments to C ones * cleaned up a lot of signed/unsigned mistakes
 *
 * Revision 1.72  2004/06/06 06:51:59  reinelt
 *
 * do not display end splash screen if quiet=1
 *
 * Revision 1.71  2004/06/02 09:41:19  reinelt
 *
 * prepared support for startup splash screen
 *
 * Revision 1.70  2004/06/02 05:14:16  reinelt
 *
 * fixed models listing for Beckmann+Egle driver
 * some cosmetic changes
 *
 * Revision 1.69  2004/03/14 07:11:42  reinelt
 * parameter count fixed for plugin_dvb()
 * plugin_APM (battery status) ported
 *
 * Revision 1.68  2004/03/11 06:39:59  reinelt
 * big patch from Martin:
 * - reuse filehandles
 * - memory leaks fixed
 * - earlier busy-flag checking with HD44780
 * - reuse memory for strings in RESULT and hash
 * - netdev_fast to wavid time-consuming regex
 *
 * Revision 1.67  2004/03/06 20:31:16  reinelt
 * Complete rewrite of the evaluator to get rid of the code
 * from mark Morley (because of license issues).
 * The new Evaluator does a pre-compile of expressions, and
 * stores them in trees. Therefore it should be reasonable faster...
 *
 * Revision 1.66  2004/03/03 04:44:16  reinelt
 * changes (cosmetics?) to the big patch from Martin
 * hash patch un-applied
 *
 * Revision 1.65  2004/03/03 03:47:04  reinelt
 * big patch from Martin Hejl:
 * - use qprintf() where appropriate
 * - save CPU cycles on gettimeofday()
 * - add quit() functions to free allocated memory
 * - fixed lots of memory leaks
 *
 * Revision 1.64  2004/02/27 07:06:25  reinelt
 * new function 'qprintf()' (simple but quick snprintf() replacement)
 *
 * Revision 1.63  2004/02/10 07:42:35  reinelt
 * cut off all old-style files which are no longer used with NextGeneration
 *
 * Revision 1.62  2004/01/30 20:57:56  reinelt
 * HD44780 patch from Martin Hejl
 * dmalloc integrated
 *
 * Revision 1.61  2004/01/14 11:33:00  reinelt
 * new plugin 'uname' which does what it's called
 * text widget nearly finished
 * first results displayed on MatrixOrbital
 *
 * Revision 1.60  2004/01/13 08:18:19  reinelt
 * timer queues added
 * liblcd4linux deactivated turing transformation to new layout
 *
 * Revision 1.59  2004/01/12 03:51:01  reinelt
 * evaluating the 'Variables' section in the config file
 *
 * Revision 1.58  2004/01/10 20:22:33  reinelt
 * added new function 'cfg_list()' (not finished yet)
 * added layout.c (will replace processor.c someday)
 * added widget_text.c (will be the first and most important widget)
 * modified lcd4linux.c so that old-style configs should work, too
 *
 * Revision 1.57  2004/01/10 17:45:26  reinelt
 * changed initialization order so cfg() gets initialized before plugins.
 * This way a plugin's init() can use cfg_get().
 * Thanks to Xavier for reporting this one!
 *
 * Revision 1.56  2004/01/09 17:03:07  reinelt
 * initiated transfer to new driver architecture
 * new file 'drv.c' will someday replace 'display.c'
 * new file 'drv_MatrixOrbital.c' will replace 'MatrixOrbital.c'
 * due to this 'soft' transfer lcd4linux should stay usable during the switch
 * (at least I hope so)
 *
 * Revision 1.55  2004/01/09 04:16:06  reinelt
 * added 'section' argument to cfg_get(), but NULLed it on all calls by now.
 *
 * Revision 1.54  2004/01/08 05:28:12  reinelt
 * Luk Claes added to AUTHORS
 * cfg: group handling ('{}') added
 *
 * Revision 1.53  2003/12/19 05:35:14  reinelt
 * renamed 'client' to 'plugin'
 *
 * Revision 1.52  2003/12/01 07:08:50  reinelt
 *
 * Patches from Xavier:
 *  - WiFi: make interface configurable
 *  - "quiet" as an option from the config file
 *  - ignore missing "MemShared" on Linux 2.6
 *
 * Revision 1.51  2003/11/16 09:45:49  reinelt
 * Crystalfontz changes, small glitch in getopt() fixed
 *
 * Revision 1.50  2003/10/22 04:19:16  reinelt
 * Makefile.in for imon.c/.h, some MatrixOrbital clients
 *
 * Revision 1.49  2003/10/11 06:01:53  reinelt
 *
 * renamed expression.{c,h} to client.{c,h}
 * added config file client
 * new functions 'AddNumericVariable()' and 'AddStringVariable()'
 * new parameter '-i' for interactive mode
 *
 * Revision 1.48  2003/10/05 17:58:50  reinelt
 * libtool junk; copyright messages cleaned up
 *
 * Revision 1.47  2003/09/10 08:37:09  reinelt
 * icons: reorganized tick_* again...
 *
 * Revision 1.46  2003/09/09 06:54:43  reinelt
 * new function 'cfg_number()'
 *
 * Revision 1.45  2003/09/09 05:30:34  reinelt
 * even more icons stuff
 *
 * Revision 1.44  2003/08/24 05:17:58  reinelt
 * liblcd4linux patch from Patrick Schemitz
 *
 * Revision 1.43  2003/08/17 16:37:39  reinelt
 * more icon framework
 *
 * Revision 1.42  2003/08/14 03:47:40  reinelt
 * remove PID file if driver initialisation fails
 *
 * Revision 1.41  2003/08/08 08:05:23  reinelt
 * added PID file handling
 *
 * Revision 1.40  2003/08/08 06:58:06  reinelt
 * improved forking
 *
 * Revision 1.39  2003/07/24 04:48:09  reinelt
 * 'soft clear' needed for virtual rows
 *
 * Revision 1.38  2003/06/13 05:11:11  reinelt
 * error message cosmetics
 *
 * Revision 1.37  2003/04/07 06:03:01  reinelt
 * further parallel port abstraction
 *
 * Revision 1.36  2003/02/22 07:53:10  reinelt
 * cfg_get(key,defval)
 *
 * Revision 1.35  2003/02/13 10:40:17  reinelt
 *
 * changed "copyright" to "2003"
 * added slightly different protocol for MatrixOrbital "LK202" displays
 *
 * Revision 1.34  2002/04/29 11:00:28  reinelt
 *
 * added Toshiba T6963 driver
 * added ndelay() with nanosecond resolution
 *
 * Revision 1.33  2001/04/27 05:04:57  reinelt
 *
 * replaced OPEN_MAX with sysconf()
 * replaced mktemp() with mkstemp()
 * unlock serial port if open() fails
 *
 * Revision 1.32  2001/03/13 07:41:22  reinelt
 *
 * added NEWS file
 *
 * Revision 1.31  2001/03/12 12:39:36  reinelt
 *
 * reworked autoconf a lot: drivers may be excluded, #define's went to config.h
 *
 * Revision 1.30  2001/03/08 15:25:38  ltoetsch
 * improved exec
 *
 * Revision 1.29  2001/02/14 07:40:16  reinelt
 *
 * first (incomplete) GPO implementation
 *
 * Revision 1.28  2000/10/25 08:10:48  reinelt
 *
 * added restart funnctionality
 * (lots of this code was stolen from sendmail.c)
 *
 * Revision 1.27  2000/08/10 18:42:20  reinelt
 *
 * fixed some bugs with the new syslog code
 *
 * Revision 1.26  2000/08/10 09:44:09  reinelt
 *
 * new debugging scheme: error(), info(), debug()
 * uses syslog if in daemon mode
 *
 * Revision 1.25  2000/08/09 14:14:11  reinelt
 *
 * new switch -F (do not fork)
 * added automatic forking if -F not specified
 *
 * Revision 1.24  2000/08/09 09:50:29  reinelt
 *
 * opened 0.98 development
 * removed driver-specific signal-handlers
 * added 'quit'-function to driver structure
 * added global signal-handler
 *
 * Revision 1.23  2000/04/17 05:14:27  reinelt
 *
 * added README.44780
 *
 * Revision 1.22  2000/04/15 16:56:52  reinelt
 *
 * moved delay loops to udelay.c
 * renamed -d (debugging) switch to -v (verbose)
 * new switch -d to calibrate delay loop
 * 'Delay' entry for HD44780 back again
 * delay loops will not calibrate automatically, because this will fail with hich CPU load
 *
 * Revision 1.21  2000/04/15 11:56:35  reinelt
 *
 * more debug messages
 *
 * Revision 1.20  2000/04/15 11:13:54  reinelt
 *
 * added '-d' (debugging) switch
 * added several debugging messages
 * removed config entry 'Delay' for HD44780 driver
 * delay loop for HD44780 will be calibrated automatically
 *
 * Revision 1.19  2000/04/10 04:40:53  reinelt
 *
 * minor changes and cleanups
 *
 * Revision 1.18  2000/04/07 05:42:20  reinelt
 *
 * UUCP style lockfiles for the serial port
 *
 * Revision 1.17  2000/04/03 17:31:52  reinelt
 *
 * suppress welcome message if display is smaller than 20x2
 * change lcd4linux.ppm to 32 pixel high so KDE won't stretch the icon
 *
 * Revision 1.16  2000/04/03 04:46:38  reinelt
 *
 * added '-c key=val' option
 *
 * Revision 1.15  2000/04/01 22:40:42  herp
 * geometric correction (too many pixelgaps)
 * lcd4linux main should return int, not void
 *
 * Revision 1.14  2000/03/26 18:46:28  reinelt
 *
 * bug in pixmap.c that leaded to empty bars fixed
 * name conflicts with X11 resolved
 *
 * Revision 1.13  2000/03/26 12:55:03  reinelt
 *
 * enhancements to the PPM driver
 *
 * Revision 1.12  2000/03/25 05:50:43  reinelt
 *
 * memory leak in Raster_flush closed
 * driver family logic changed
 *
 * Revision 1.11  2000/03/24 11:36:56  reinelt
 *
 * new syntax for raster configuration
 * changed XRES and YRES to be configurable
 * PPM driver works nice
 *
 * Revision 1.10  2000/03/23 07:24:48  reinelt
 *
 * PPM driver up and running (but slow!)
 *
 * Revision 1.9  2000/03/22 15:36:21  reinelt
 *
 * added '-l' switch (list drivers)
 * generic pixmap driver added
 * X11 Framework done
 *
 * Revision 1.8  2000/03/22 07:33:50  reinelt
 *
 * FAQ added
 * new modules 'processor.c' contains all data processing
 *
 * Revision 1.7  2000/03/19 08:41:28  reinelt
 *
 * documentation available! README, README.MatrixOrbital, README.Drivers
 * added Skeleton.c as a starting point for new drivers
 *
 * Revision 1.6  2000/03/18 10:31:06  reinelt
 *
 * added sensor handling (for temperature etc.)
 * made data collecting happen only if data is used
 * (reading /proc/meminfo takes a lot of CPU!)
 * released lcd4linux-0.92
 *
 * Revision 1.5  2000/03/18 08:07:04  reinelt
 *
 * vertical bars implemented
 * bar compaction improved
 * memory information implemented
 *
 * Revision 1.4  2000/03/17 09:21:42  reinelt
 *
 * various memory statistics added
 *
 * Revision 1.3  2000/03/13 15:58:24  reinelt
 *
 * release 0.9
 * moved row parsing to parser.c
 * all basic work finished
 *
 * Revision 1.2  2000/03/10 17:36:02  reinelt
 *
 * first unstable but running release
 *
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <time.h>

#include "cfg.h"
#include "debug.h"
#include "qprintf.h"
#include "pid.h"
#include "udelay.h"
#include "drv.h"
#include "timer.h"
#include "layout.h"
#include "plugin.h"


#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif

#define PIDFILE "/var/run/lcd4linux.pid"

static char *release = "LCD4Linux " VERSION;
static char *copyright = "Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>";
static char **my_argv;
extern char *output;

int got_signal = 0;


static void usage(void)
{
    printf("%s\n", release);
    printf("%s\n", copyright);
    printf("usage: lcd4linux [-h]\n");
    printf("       lcd4linux [-l]\n");
    printf("       lcd4linux [-c key=value] [-i] [-f config-file] [-v]\n");
    printf("       lcd4linux [-c key=value] [-F] [-f config-file] [-o output-file] [-q] [-v]\n");
}

static void interactive_mode(void)
{
    char line[1024];
    void *tree;
    RESULT result = { 0, 0, 0, NULL };

    printf("\neval> ");
    for (fgets(line, 1024, stdin); !feof(stdin); fgets(line, 1024, stdin)) {
	if (line[strlen(line) - 1] == '\n')
	    line[strlen(line) - 1] = '\0';
	if (strlen(line) > 0) {
	    if (Compile(line, &tree) != -1) {
		Eval(tree, &result);
		if (result.type == R_NUMBER) {
		    printf("%g\n", R2N(&result));
		} else if (result.type == R_STRING) {
		    printf("'%s'\n", R2S(&result));
		} else if (result.type == (R_NUMBER | R_STRING)) {
		    printf("'%s' (%g)\n", R2S(&result), R2N(&result));
		} else {
		    printf("internal error: unknown result type %d\n", result.type);
		}
		DelResult(&result);
	    }
	    DelTree(tree);
	}
	printf("eval> ");
    }
    printf("\n");
}


void handler(int signal)
{
    debug("got signal %d", signal);
    got_signal = signal;
}


static void daemonize(void)
{

    /* thanks to Petri Damsten, we now follow the guidelines from the UNIX Programming FAQ */
    /* 1.7 How do I get my program to act like a daemon? */
    /* http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16 */
    /* especially the double-fork solved the 'lcd4linux dying when called from init' problem */

    pid_t i;
    int fd;


    /* Step 1: fork() so that the parent can exit */
    i = fork();
    if (i < 0) {
	error("fork(#1) failed: %s", strerror(errno));
	exit(1);
    }
    if (i != 0)
	exit(0);

    /* Step 2: setsid() to become a process group and session group leader */
    setsid();

    /* Step 3: fork() again so the parent (the session group leader) can exit */
    i = fork();
    if (i < 0) {
	error("fork(#2) failed: %s", strerror(errno));
	exit(1);
    }
    if (i != 0)
	exit(0);

    /* Step 4: chdir("/") to ensure that our process doesn't keep any directory in use */
    if (chdir("/") != 0) {
	error("chdir(\"/\") failed: %s", strerror(errno));
	exit(1);
    }

    /* Step 5: umask(0) so that we have complete control over the permissions of anything we write */
    umask(0);

    /* Step 6: Establish new open descriptors for stdin, stdout and stderr */
    /* detach stdin */
    if (freopen("/dev/null", "r", stdin) == NULL) {
	error("freopen (/dev/null) failed: %s", strerror(errno));
	exit(1);
    }

    /* detach stdout and stderr */
    fd = open("/dev/null", O_WRONLY, 0666);
    if (fd == -1) {
	error("open (/dev/null) failed: %s", strerror(errno));
	exit(1);
    }
    fflush(stdout);
    dup2(fd, STDOUT_FILENO);
    fflush(stderr);
    dup2(fd, STDERR_FILENO);
    close(fd);

}


int main(int argc, char *argv[])
{
    char *cfg = "/etc/lcd4linux.conf";
    char *display, *driver, *layout;
    char section[32];
    int c;
    int quiet = 0;
    int interactive = 0;
    int pid;

    /* save arguments for restart */
    my_argv = malloc(sizeof(char *) * (argc + 1));
    for (c = 0; c < argc; c++) {
	my_argv[c] = strdup(argv[c]);
    }
    my_argv[c] = NULL;

    running_foreground = 0;
    running_background = 0;

    while ((c = getopt(argc, argv, "c:Ff:hilo:qv")) != EOF) {

	switch (c) {
	case 'c':
	    if (cfg_cmd(optarg) < 0) {
		fprintf(stderr, "%s: illegal argument -c '%s'\n", argv[0], optarg);
		exit(2);
	    }
	    break;
	case 'F':
	    running_foreground++;
	    break;
	case 'f':
	    cfg = optarg;
	    break;
	case 'h':
	    usage();
	    exit(0);
	case 'i':
	    interactive++;
	    break;
	case 'l':
	    printf("%s\n", release);
	    printf("%s\n", copyright);
	    drv_list();
	    exit(0);
	case 'o':
	    output = optarg;
	    break;
	case 'q':
	    quiet++;
	    break;
	case 'v':
	    verbose_level++;
	    break;
	default:
	    exit(2);
	}
    }

    if (optind < argc) {
	fprintf(stderr, "%s: illegal option %s\n", argv[0], argv[optind]);
	exit(2);
    }

    /* do not fork in interactive mode */
    if (interactive) {
	running_foreground = 1;
    }

    info("Version " VERSION " starting");
    if (!running_foreground && (my_argv[0] == NULL || my_argv[0][0] != '/')) {
	info("invoked without full path; restart may not work!");
    }

    if (cfg_init(cfg) == -1)
	exit(1);

    if (plugin_init() == -1)
	exit(1);

    display = cfg_get(NULL, "Display", NULL);
    if (display == NULL || *display == '\0') {
	error("missing 'Display' entry in %s!", cfg_source());
	exit(1);
    }

    qprintf(section, sizeof(section), "Display:%s", display);
    free(display);
    driver = cfg_get(section, "Driver", NULL);
    if (driver == NULL || *driver == '\0') {
	error("missing '%s.Driver' entry in %s!", section, cfg_source());
	exit(1);
    }

    if (!running_foreground) {

	debug("going background...");

	daemonize();

	/* ignore nasty signals */
	signal(SIGINT, SIG_IGN);
	signal(SIGQUIT, SIG_IGN);

	/* create PID file */
	if ((pid = pid_init(PIDFILE)) != 0) {
	    error("lcd4linux already running as process %d", pid);
	    exit(1);
	}

	/* now we are a daemon */
	running_background = 1;
    }

    /* go into interactive mode before display initialization */
    if (interactive >= 2) {
	interactive_mode();
	pid_exit(PIDFILE);
	cfg_exit();
	exit(0);
    }

    /* check the conf to see if quiet startup is wanted  */
    if (!quiet) {
	cfg_number(NULL, "Quiet", 0, 0, 1, &quiet);
    }

    debug("initializing driver %s", driver);
    if (drv_init(section, driver, quiet) == -1) {
	pid_exit(PIDFILE);
	exit(1);
    }
    free(driver);

    /* go into interactive mode (display has been initialized) */
    if (interactive >= 1) {
	interactive_mode();
	drv_quit(quiet);
	pid_exit(PIDFILE);
	cfg_exit();
	exit(0);
    }

    /* check for new-style layout */
    layout = cfg_get(NULL, "Layout", NULL);
    if (layout == NULL || *layout == '\0') {
	error("missing 'Layout' entry in %s!", cfg_source());
	exit(1);
    }

    layout_init(layout);
    free(layout);

    debug("starting main loop");

    /* now install our own signal handler */
    signal(SIGHUP, handler);
    signal(SIGINT, handler);
    signal(SIGQUIT, handler);
    signal(SIGTERM, handler);

    while (got_signal == 0) {
	struct timespec delay;
	if (timer_process(&delay) < 0)
	    break;
	nanosleep(&delay, NULL);
    }

    debug("leaving main loop");

    drv_quit(quiet);
    pid_exit(PIDFILE);
    cfg_exit();
    plugin_exit();
    timer_exit();

    if (got_signal == SIGHUP) {
	long fd;
	debug("restarting...");
	/* close all files on exec */
	for (fd = sysconf(_SC_OPEN_MAX); fd > 2; fd--) {
	    int flag;
	    if ((flag = fcntl(fd, F_GETFD, 0)) != -1)
		fcntl(fd, F_SETFD, flag | FD_CLOEXEC);
	}
	execv(my_argv[0], my_argv);
	error("execv() failed: %s", strerror(errno));
	exit(1);
    }

    for (c = 0; my_argv[c] != NULL; c++) {
	free(my_argv[c]);
    }
    free(my_argv);

    exit(0);
}