1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* $Id: battery.c,v 1.3 2001/08/05 17:13:29 reinelt Exp $
*
* APM and ACPI specific functions
*
* Copyright 2001 by Leo T�tsch (lt@toetsch.at)
*
* This program 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.
*
* This program 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 1.3 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;
}
|
