/* $Id: lcd4linux.c,v 1.63 2004/02/10 07:42:35 reinelt Exp $
*
* LCD4Linux
*
* Copyright 1999-2003 Michael Reinelt <reinelt@eunet.at>
*
* 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 1.63 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 "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 " (c) 2003 Michael Reinelt <reinelt@eunet.at>";
static char **my_argv;
static int got_signal=0;
int tick, tack;
extern char* output;
static void usage(void)
{
printf ("%s\n", release);
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");
}
#if 0
// Fixme: how to hello() with new layout?
int hello (void)
{
int i, x, y, flag;
char *line1[] = { "* LCD4Linux " VERSION " *",
"LCD4Linux " VERSION,
"LCD4Linux",
"L4Linux",
NULL };
char *line2[] = { "(c) 2003 M.Reinelt",
"(c) M.Reinelt",
NULL };
lcd_query (&y, &x, NULL, NULL, NULL, NULL, NULL);
flag=0;
for (i=0; line1[i]; i++) {
if (strlen(line1[i])<=x) {
lcd_put (1, (x-strlen(line1[i]))/2+1, line1[i]);
flag=1;
break;
}
}
for (i=0; line2[i]; i++) {
if (strlen(line2[i])<=x) {
lcd_put (2, (x-strlen(line2[i]))/2+1, line2[i]);
flag=1;
break;
}
}
if (flag) lcd_flush();
return flag;
}
#endif
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;
// 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);
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);
}
snprintf (section, sizeof(section), "Display:%s", 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_init(PIDFILE)!=0) {
error ("PID file creation failed!");
exit (1);
}
// now we are a daemon
running_background=1;
}
debug ("initializing driver %s", driver);
if (drv_init(section, driver)==-1) {
pid_exit(PIDFILE);
exit (1);
}
// 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);
// maybe go into interactive mode
if (interactive) {
char line[1024];
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) {
Eval(line, &result);
if (result.type==R_NUMBER) {
printf ("%g\n", R2N(&result));
} else if (result.type==R_STRING) {
printf ("'%s'\n", R2S(&result));
}
DelResult (&result);
}
printf("eval> ");
}
printf ("\n");
drv_quit();
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);
}
#if 0
// Fixme: how to hello() with new layout?
if (!quiet && hello()) {
sleep (3);
lcd_clear(1);
}
#endif
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");
#if 0
// Fixme: how to hello() with new layout?
lcd_clear(1);
if (!quiet) hello();
#endif
drv_quit();
pid_exit(PIDFILE);
cfg_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);
}
exit (0);
}