/* $Id: lcd4linux.c,v 1.78 2005/05/08 04:32:44 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 1.78 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;
}
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) {
pid_t i;
int fd;
debug("going background...");
i = fork();
if (i < 0) {
error("fork() failed: %s", strerror(errno));
exit(1);
}
if (i != 0)
exit(0);
/* ignore nasty signals */
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
/* chdir("/") */
if (chdir("/") != 0) {
error("chdir(\"/\") failed: %s", strerror(errno));
exit(1);
}
/* we want full control over permissions */
umask(0);
/* 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);
fflush(stderr);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
/* 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);
}