mirror of
https://github.com/netfun2000/lcd4linux.git
synced 2026-02-27 09:44:34 +08:00
546476ef7e
libtool junk; copyright messages cleaned up git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@253 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
145 lines
3.7 KiB
C
145 lines
3.7 KiB
C
/* $Id: battery.c,v 1.4 2003/10/05 17:58:50 reinelt Exp $
|
|
*
|
|
* APM and ACPI specific functions
|
|
*
|
|
* Copyright 2001 Leo Tötsch <lt@toetsch.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: battery.c,v $
|
|
* Revision 1.4 2003/10/05 17:58:50 reinelt
|
|
* libtool junk; copyright messages cleaned up
|
|
*
|
|
* Revision 1.3 2001/08/05 17:13:29 reinelt
|
|
*
|
|
* cleaned up inlude of sys/time.h and time.h
|
|
*
|
|
* Revision 1.2 2001/03/02 11:04:08 reinelt
|
|
*
|
|
* cosmetic cleanups (comment headers)
|
|
*
|
|
*/
|
|
|
|
/* exported functions:
|
|
*
|
|
* int Battery (double *perc, int *status, double *lasting);
|
|
* returns:
|
|
* perc ... percentage of battery (0..100)
|
|
* status .. 0 (online), 1 (charging), 2 (discharging)
|
|
* lasting ... seconds, how long battery will last
|
|
*
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "debug.h"
|
|
|
|
|
|
int Battery (int *perc, int *status, double *dur)
|
|
{
|
|
static int fd = -2;
|
|
static int apm = 0;
|
|
|
|
if (fd==-1) return -1;
|
|
|
|
if (fd==-2) {
|
|
fd = open("/proc/apm", O_RDONLY | O_NDELAY);
|
|
if (fd==-1) {
|
|
error ("open(/proc/apm) failed: %s", strerror(errno));
|
|
fd = open("/proc/acpi", O_RDONLY | O_NDELAY); /* FIXME */
|
|
if (fd==-1) {
|
|
error ("open(/proc/acpi) failed: %s", strerror(errno));
|
|
return -1;
|
|
}
|
|
debug ("open(/proc/acpi)=%d", fd);
|
|
}
|
|
else {
|
|
debug ("open(/proc/apm)=%d", fd);
|
|
apm = 1;
|
|
}
|
|
}
|
|
if (lseek(fd, 0L, SEEK_SET)!=0) {
|
|
error ("lseek(/proc/apm|acpi) failed: %s", strerror(errno));
|
|
fd=-1;
|
|
return -1;
|
|
}
|
|
if (apm) {
|
|
int f3, f4;
|
|
char eh[4];
|
|
char buffer[128];
|
|
/* /usr/src/linux/arch/i386/kernel/apm.c :
|
|
p += sprintf(p, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
|
|
driver_version,
|
|
(apm_bios_info.version >> 8) & 0xff,
|
|
apm_bios_info.version & 0xff,
|
|
apm_bios_info.flags,
|
|
ac_line_status,
|
|
battery_status,
|
|
battery_flag,
|
|
percentage,
|
|
time_units,
|
|
units);
|
|
3) AC line status
|
|
0x00: Off-line
|
|
0x01: On-line
|
|
0x02: On backup power (BIOS >= 1.1 only)
|
|
0xff: Unknown
|
|
4) Battery status
|
|
0x00: High
|
|
0x01: Low
|
|
0x02: Critical
|
|
0x03: Charging
|
|
0x04: Selected battery not present (BIOS >= 1.2 only)
|
|
0xff: Unknown
|
|
*/
|
|
|
|
if (read (fd, &buffer, sizeof(buffer)-1)==-1) {
|
|
error ("read(/proc/apm) failed: %s", strerror(errno));
|
|
fd=-1;
|
|
return -1;
|
|
}
|
|
/* Ver v.v fl as bs bf perc tu u*/
|
|
sscanf(buffer, "%*s %*s %*s %x %x %*s %d%% %lf %3s", &f3, &f4, perc, dur, eh);
|
|
if (f3 == 0x1)
|
|
*status = 0; /* Online */
|
|
else
|
|
*status = 2; /* Offline = discharging */
|
|
if (f4 == 0x3)
|
|
*status = 1; /* charging */
|
|
eh[1] = '\0'; /* m | s */
|
|
if (*eh == 'm')
|
|
*dur *= 60;
|
|
#ifdef DEBUG_BATT
|
|
info("perc=%d, f3=%x, f4=%x, stat=%d, dur=%lf", *perc,f3,f4, *status, *dur);
|
|
#endif
|
|
}
|
|
else {
|
|
/* FIXME: parse ACPI */
|
|
}
|
|
return 0;
|
|
}
|