lcdproc/clients/lcdproc/batt.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/utsname.h>

#include "../../shared/sockets.h"

#include "main.h"
#include "mode.h"
#include "batt.h"

int batt_fd = 0;


static int get_batt_stat (int *acstat, int *battstat, int *battflag, int *percent);

static int
get_batt_stat (int *acstat, int *battstat, int *battflag, int *percent)
{
   char str[64];

   if (!batt_fd)
      batt_fd = open ("/proc/apm", O_RDONLY);
   if (batt_fd <= 0)
      return -1;

   if (lseek (batt_fd, 0, 0) != 0)
      return -1;

   if (read (batt_fd, str, sizeof (str) - 1) < 0)
      return -1;

   if (3 > sscanf (str + 13, "0x%x 0x%x 0x%x %d", acstat, battstat, battflag, percent))
      return -1;

   return 0;

}



int
batt_init ()
{
   static int first = 1;

   if (first) {
      first = 0;
      sock_send_string (sock, "screen_add B\n");
   }

   return 0;
}

int
batt_close ()
{
   if (batt_fd)
      close (batt_fd);
   batt_fd = 0;

   return 0;
}


////////////////////////////////////////////////////////////////////////
// Battery Screen shows apm battery status...
//

//####################
//## Battery: 100% ###
//AC: Unknown
//Batt: Low (Charging)
//E------------------F

int
battery_screen (int rep, int display)
{
   static int first = 1;

   int acstat = 0, battstat = 0, battflag = 0, percent = 0;


   if (first) {
      first = 0;

      sprintf (buffer, "screen_set B -name {APM stats: %s}\n", host);
      sock_send_string (sock, buffer);
      sock_send_string (sock, "widget_add B title title\n");
      sprintf (tmp, "widget_set B title {LCDPROC %s}\n", version);
      sock_send_string (sock, tmp);
      sock_send_string (sock, "widget_add B one string\n");
      if (lcd_hgt >= 4) {
	 sock_send_string (sock, "widget_add B two string\n");
	 sock_send_string (sock, "widget_add B three string\n");
	 sock_send_string (sock, "widget_add B gauge hbar\n");
	 sock_send_string (sock, "widget_set B one 1 2 {AC: Unknown}\n");
	 sock_send_string (sock, "widget_set B two 1 3 {Batt: Unknown}\n");
	 sock_send_string (sock, "widget_set B three 1 4 {E                  F}\n");
	 sock_send_string (sock, "widget_set B gauge 2 4 0\n");
      }
   }
   // Only run once every 16 frames...
   //if(rep&0x0f) return 0;

   get_batt_stat (&acstat, &battstat, &battflag, &percent);


   if (percent >= 0)
      sprintf (buffer, "%i%%", percent);
   else
      sprintf (buffer, "??%%");
   sprintf (tmp, "widget_set B title {Batt: %s: %s}\n", buffer, host);

   if (display)
      sock_send_string (sock, tmp);


   if (lcd_hgt >= 4)		// 4-line version of the screen
   {
      sprintf (tmp, "widget_set B one 1 2 {");
      switch (acstat) {
      case 0:
	 sprintf (tmp + strlen (tmp), "AC: Off}\n");
	 break;
      case 1:
	 sprintf (tmp + strlen (tmp), "AC: On}\n");
	 break;
      case 2:
	 sprintf (tmp + strlen (tmp), "AC: Backup}\n");
	 break;
      default:
	 sprintf (tmp + strlen (tmp), "AC: Unknown}\n");
	 break;
      }

      if (display)
	 sock_send_string (sock, tmp);



      sprintf (tmp, "widget_set B two 1 3 {");
      if (battflag == 0xff) {
	 sprintf (tmp + strlen (tmp), "Battery Stat Unknown");
      } else {
	 sprintf (tmp + strlen (tmp), "Batt:");
	 if (battflag & 1)
	    sprintf (tmp + strlen (tmp), " High");
	 if (battflag & 2)
	    sprintf (tmp + strlen (tmp), " Low");
	 if (battflag & 4)
	    sprintf (tmp + strlen (tmp), " Critical");
	 if (battflag & 8 || battstat == 3)
	    sprintf (tmp + strlen (tmp), " Charging");
	 if (battflag & 128)
	    sprintf (tmp + strlen (tmp), " (NONE)");
      }
      sprintf (tmp + strlen (tmp), "}\n");
      if (display)
	 sock_send_string (sock, tmp);


      if (percent > 0) {
	 sprintf (tmp, "widget_set B gauge 2 4 %i\n", (percent * ((lcd_wid - 2) * lcd_cellwid) / 100));
	 if (display)
	    sock_send_string (sock, tmp);
      }
   }				// end if(lcd_hgt >= 4)
   else				// two-line version of the screen
   {
      sprintf (tmp, "widget_set B one 1 2 {");
      if (acstat == 1)
	 sprintf (tmp + strlen (tmp), "AC, ");

      if (battflag == 0xff) {
	 sprintf (tmp + strlen (tmp), "No battery???");
      } else {
	 sprintf (tmp + strlen (tmp), "Batt:");
	 if (battflag & 1)
	    sprintf (tmp + strlen (tmp), " High");
	 if (battflag & 2)
	    sprintf (tmp + strlen (tmp), " Low");
	 if (battflag & 4)
	    sprintf (tmp + strlen (tmp), " Critical");
	 if (battflag & 8 || battstat == 3)
	    sprintf (tmp + strlen (tmp), " Charging");
	 if (battflag & 128)
	    sprintf (tmp + strlen (tmp), " (NONE)");
      }
      sprintf (tmp + strlen (tmp), "}\n");
      if (display)
	 sock_send_string (sock, tmp);

   }

   return 0;
}