From 991cae8c076d9da475bf833186219b3d2a396f29 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Sun, 16 Jan 2000 12:17:59 +0000
Subject: [lcd4linux @ 2000-01-16 12:17:59 by reinelt] Initial revision

---
 lcd4linux.c | 499 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 499 insertions(+)
 create mode 100644 lcd4linux.c

(limited to 'lcd4linux.c')

diff --git a/lcd4linux.c b/lcd4linux.c
new file mode 100644
index 0000000..9dbe92f
--- /dev/null
+++ b/lcd4linux.c
@@ -0,0 +1,499 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <math.h>
+
+#include "config.h"
+#include "lcd2041.h"
+#include "system.h"
+#include "isdn.h"
+
+int tick, tack, tau;
+double overload;
+double temp_min, temp_max;
+char *sensor;
+char *row[ROWS];
+
+void usage(void)
+{
+  printf ("LCD4Linux " VERSION " (c) 1999 Michael Reinelt <reinelt@eunet.at>");
+  printf ("usage: LCD4Linux [configuration]\n");
+}
+
+char *parse (char *string)
+{
+  static char buffer[256];
+  char *s=string;
+  char *p=buffer;
+
+  do {
+    if (*s=='%') {
+      if (strchr("orpmlLbtdDnNiI%", *++s)==NULL) {
+	fprintf (stderr, "WARNING: unknown format <%%%c> in <%s>\n", *s, string);
+	continue;
+      } 
+      *p='%';
+      *(p+1)=*s;
+      switch (*s) {
+      case 'd':
+	if (strchr("rwmt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown disk tag <%%i%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+2)=*s;
+	p+=3;
+	break;
+      case 'n':
+	if (strchr("rwmt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown net tag <%%i%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+2)=*s;
+	p+=3;
+	break;
+      case 'i':
+	if (strchr("iomt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown ISDN tag <%%i%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+2)=*s;
+	p+=3;
+	break;
+      default:
+	p+=2;
+      }
+      
+    } else if (*s=='$') {
+      char hv, dir;
+      int len=0;
+      hv=*++s;
+      if (tolower(hv)!='h' && tolower(hv)!='v') {
+	fprintf (stderr, "invalid bar orientation '%c' in <%s>\n", hv, string);
+	continue;
+      }
+      s++;
+      if (isdigit(*s)) len=strtol(s, &s, 10);
+      if (len<1 || len>255) {
+	fprintf (stderr, "invalid bar length in <%s>\n", string);
+	continue;
+      }
+      dir=*s++;
+      if ((tolower(hv)=='h' && dir!='l' && dir !='r') || (tolower(hv)=='v' && dir!='u' && dir !='d')) {
+	fprintf (stderr, "invalid bar direction '%c' in <%s>\n", dir, string);
+	continue;
+      }
+      *p='$';
+      *(p+1)=hv;
+      *(p+2)=len;
+      if (dir=='r' || dir=='u') *(p+3)='0';
+      else *(p+3)='1';
+      *(p+4)=*s;
+      switch (*s) {
+      case 'd':
+	if (strchr("rwmt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown disk tag <$i*%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+5)=*s;
+	p+=6;
+	break;
+      case 'n':
+	if (strchr("rwmt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown net tag <$i*%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+5)=*s;
+	p+=6;
+	break;
+      case 'i':
+	if (strchr("iomt", *++s)==NULL) {
+	  fprintf (stderr, "WARNING: unknown ISDN tag <$i*%c> in <%s>\n", *s, string);
+	  continue;
+	} 
+	*(p+5)=*s;
+	p+=6;
+	break;
+      default:
+	p+=5;
+      }
+      
+    } else if (*s=='\\') {
+      unsigned int c=0; int n;
+      if (*(s+1)=='\\') {
+	*p++='\\';
+	s+=2;
+      } else {
+	sscanf (s+1, "%3o%n", &c, &n);
+	if (c==0 || c>255) {
+	  fprintf (stderr, "WARNING: illegal '\\' in <%s> <%s>\n", string, s);
+	  continue;
+	}
+	*p++=c;
+	s+=n;
+      }
+      
+    } else {
+      *p++=*s;
+    }
+    
+  } while (*s++);
+  
+  return buffer;
+}
+
+
+void display (int smooth) {
+  static double disk_max=1.0;
+  static double net_max=1.0;
+  double busy, load, temp, disk, net, isdn;
+  int disk_r, disk_w;
+  int net_tx, net_rx;
+  int isdn_usage, isdn_in, isdn_out;
+  char buffer[256];
+  int i;
+  
+  busy=Busy();
+  load=Load();
+  Disk (&disk_r, &disk_w);
+  Net (&net_rx, &net_tx);
+  temp=Temperature();
+  isdn_usage=Isdn(&isdn_in, &isdn_out);
+
+  if (disk_r>disk_max) disk_max=disk_r;
+  if (disk_w>disk_max) disk_max=disk_w;
+
+  if (net_rx>net_max) net_max=net_rx;
+  if (net_tx>net_max) net_max=net_tx;
+  
+  for (i=0; i<ROWS; i++) {
+    char *s=row[i];
+    char *p=buffer;
+    do {
+      if (*s=='%') {
+	switch (*++s) {
+	case '%':
+	  *p++='%';
+	  break;
+	case 'o':
+	  p+=sprintf (p, "%s", System());
+	  break;
+	case 'r':
+	  p+=sprintf (p, "%s", Release());
+	  break;
+	case 'p':
+	  p+=sprintf (p, "%s", Processor());
+	  break;
+	case 'm':
+	  p+=sprintf (p, "%d", Memory());
+	  break;
+	case 'l':
+	  if (load<10.0)
+	    p+=sprintf (p, "%4.2f", load);
+	  else
+	    p+=sprintf (p, "%4.1f", load);
+	  break;
+	case 'L':
+	  *p++=load>overload?'!':' ';
+	  break;
+	case 'b':
+	  p+=sprintf (p, "%3.0f", 100.0*busy);
+	  break;
+	case 'd':
+	  switch (*++s) {
+	  case 'r':
+	    disk=disk_r;
+	    break;
+	  case 'w':
+	    disk=disk_w;
+	    break;
+	  case 'm':
+	    disk=disk_r>disk_w?disk_r:disk_w;
+	    break;
+	  default:
+	    disk=disk_r+disk_w;
+	    break;
+	  }
+	  disk/=1024;
+	  if (disk<10.0) {
+	    p+=sprintf (p, "%4.2f", disk);
+	  } else if (disk<100.0) {
+	    p+=sprintf (p, "%4.1f", disk);
+	  } else {
+	    p+=sprintf (p, "%4.0f", disk);
+	  }
+	  break;
+	case 'D':
+	  if (disk_r+disk_w==0)
+	    *p++=' ';
+	  else
+	    *p++=disk_r>disk_w?'\176':'\177';
+	  break;
+	case 'n':
+	  switch (*++s) {
+	  case 'r':
+	    net=net_rx;
+	    break;
+	  case 'w':
+	    net=net_tx;
+	    break;
+	  case 'm':
+	    net=net_rx>net_tx?net_rx:net_tx;
+	    break;
+	  default:
+	    net=net_rx+net_tx;
+	    break;
+	  }
+	  net/=1024.0;
+	  if (net<10.0) {
+	    p+=sprintf (p, "%4.2f", net);
+	  } else if (net<100.0) {
+	    p+=sprintf (p, "%4.1f", net);
+	  } else {
+	    p+=sprintf (p, "%4.0f", net);
+	  }
+	  break;
+	case 'N':
+	  if (net_rx+net_tx==0)
+	    *p++=' ';
+	  else
+	    *p++=net_rx>net_tx?'\176':'\177';
+	  break;
+	case 't':
+	  p+=sprintf (p, "%5.1f", temp);
+	  break;
+	case 'i':
+	  if (isdn_usage) {
+	    switch (*++s) {
+	    case 'i':
+	      isdn=isdn_in;
+	      break;
+	    case 'o':
+	      isdn=isdn_out;
+	      break;
+	    case 'm':
+	      isdn=isdn_in>isdn_out?isdn_in:isdn_out;
+	      break;
+	    default:
+	      isdn=isdn_in+isdn_out;
+	      break;
+	    }
+	    isdn/=1024.0;
+	    if (isdn<10.0) {
+	      p+=sprintf (p, "%4.2f", isdn);
+	    } else if (isdn<100.0) {
+	      p+=sprintf (p, "%4.1f", isdn);
+	    } else {
+	      p+=sprintf (p, "%4.0f", isdn);
+	    }
+	  } else {
+	    p+=sprintf (p, "----");
+	    s++;
+	  }
+	  break;
+	case 'I':
+	  if (isdn_in+isdn_out==0)
+	    *p++=' ';
+	  else
+	    *p++=isdn_in>isdn_out?'\176':'\177';
+	  break;
+	}
+	
+      } else if (*s=='$') {
+      double val;
+      int hv, len, dir;
+      hv=*++s;
+      len=*++s;
+      dir=*++s;
+      switch (*++s) {
+      case 'l':
+	val=load/overload;
+	break;
+      case  'b':
+	val=busy;
+	break;
+      case 'd':
+	switch (*++s) {
+	case 'r':
+	  val=disk_r/disk_max;
+	  break;
+	case 'w':
+	  val=disk_w/disk_max;
+	  break;
+	case 'm':
+	  val=(disk_r>disk_w?disk_r:disk_w)/disk_max;
+	  break;
+	default:
+	  val=(disk_r+disk_w)/(2*disk_max);
+	  break;
+	}
+	break;
+      case 'n':
+	switch (*++s) {
+	case 'r':
+	  val=net_rx/net_max;
+	  break;
+	case 'w':
+	  val=net_tx/net_max;
+	  break;
+	case 'm':
+	  val=(net_rx>net_tx?net_rx:net_tx)/net_max;
+	  break;
+	default:
+	  val=(net_rx+net_tx)/(2*net_max);
+	  break;
+	}
+	break;
+      case 't':
+	val=(temp-temp_min)/(temp_max-temp_min);
+	break;
+      case 'i':
+	switch (*++s) {
+	case 'i':
+	  val=isdn_in;
+	  break;
+	case 'o':
+	  val=isdn_out;
+	  break;
+	case 'm':
+	  val=isdn_in>isdn_out?isdn_in:isdn_out;
+	  break;
+	default:
+	  val=isdn_in+isdn_out;
+	  break;
+	}
+	val/=8000.0;
+	break;
+      default:
+	val=0.0;
+      }
+      switch (hv) {
+      case 'h':
+	lcd_hbar (p-buffer+1, i+1, dir-'0', len*XRES, val*len*XRES); 
+	break;
+      case 'H':
+	lcd_hbar (p-buffer+1, i+1, dir-'0', len*XRES, (double)len*XRES*log(val*len*XRES+1)/log(len*XRES)); 
+	break;
+      case 'v':
+	lcd_vbar (p-buffer+1, i+1, dir-'0', len*YRES, val*len*XRES); 
+	break;
+      }
+      while (len-->0) {
+	*p++='\t'; 
+      }
+      
+    } else {
+      *p++=*s;
+    }
+  } while (*s++);
+    
+    if (smooth==0) {
+      p=buffer;
+      while (*p) {
+	while (*p=='\t') p++;
+	for (s=p; *s; s++) {
+	  if (*s=='\t') {
+	    *s++='\0';
+	    break;
+	  }
+	}
+	if (*p) {
+	  lcd_put (p-buffer+1, i+1, p);
+	}
+	p=s;
+      }
+    }
+  }
+}
+
+
+void main (int argc, char *argv[])
+{
+  char *cfg_file="/etc/lcd4linux.conf";
+  char *port;
+  int i;
+  int contrast;
+  int smooth;
+  
+  if (argc>2) {
+    usage();
+    exit (2);
+  }
+  if (argc==2) {
+    cfg_file=argv[1];
+  }
+
+  set_cfg ("row1", "*** %o %r ***");
+  set_cfg ("row2", "%p CPU  %m MB RAM");
+  set_cfg ("row3", "Busy %b%% $r50b");
+  set_cfg ("row4", "Load %l$r50l");
+
+  set_cfg ("tick", "100");
+  set_cfg ("tack", "500");
+  set_cfg ("tau", "500");
+  set_cfg ("contrast", "140");
+  set_cfg ("overload", "2.0");
+  set_cfg ("temp_min", "20");
+  set_cfg ("temp_max", "70");
+  
+  set_cfg ("fifo", "/var/run/LCD4Linux");
+
+  if (read_cfg (cfg_file)==-1)
+    exit (1);
+
+  port=get_cfg("port");
+  sensor=get_cfg("temperature");
+  tick=atoi(get_cfg("tick"));
+  tack=atoi(get_cfg("tack"));
+  tau=atoi(get_cfg("tau"));
+  contrast=atoi(get_cfg("contrast"));
+  overload=atof(get_cfg("overload"));
+  temp_min=atof(get_cfg("temp_min"));
+  temp_max=atof(get_cfg("temp_max"));
+
+  if (port==NULL || *port=='\0') {
+    fprintf (stderr, "%s: missing 'port' entry!\n", cfg_file);
+    exit (1);
+  }
+  
+  for (i=0; i<ROWS; i++) {
+    char buffer[8];
+    snprintf (buffer, sizeof(buffer), "row%d", i+1);
+    row[i]=strdup(parse(get_cfg(buffer)));
+  }
+  
+  lcd_init(port);
+  lcd_clear();
+  lcd_contrast (contrast);
+
+  lcd_put (1, 1, "** LCD4Linux " VERSION " **");
+  lcd_put (1, 3, "(c) 1999 M. Reinelt");
+
+
+  { 
+    int a, b, c, d;
+
+    lcd_dbar_init();
+    for (a=0; a<40; a++) {
+      b=40-a;
+      c=2*a;
+      d=c+a;
+      lcd_dbar (2, 1, 0, 80, a, b);
+      lcd_dbar (2, 2, 0, 80, c, d);
+      lcd_dbar_flush();
+      usleep( 300*1000);
+    }
+  }
+
+  sleep (2);
+  lcd_clear();
+
+  smooth=0;
+  while (1) {
+    display(smooth);
+    smooth+=tick;
+    if (smooth>tack) smooth=0;
+    usleep(1000*tick);
+  }
+}
-- 
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