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/*
* Copyright (C) 2002-2005 Mattia Dongili <malattia@linux.it>
* George Staikos <staikos@0wned.org>
*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "cpufreqd_plugin.h"
#define APM_PROC_FILE "/proc/apm"
#define PLUGGED 1
#define UNPLUGGED 0
struct battery_interval {
int min, max;
};
static int battery_present;
static int battery_percent;
static unsigned int ac_state;
/* static int apm_init(void)
*
* test if apm file id present
*/
static int apm_init(void) {
struct stat sb;
int rc;
rc = stat(APM_PROC_FILE, &sb);
if (rc < 0) {
clog(LOG_INFO, "%s: %s\n", APM_PROC_FILE, strerror(errno));
return -1;
}
return 0;
}
static int apm_exit(void) {
return 0;
}
/* static int apm_ac_update(void)
*
* reads temperature valuse ant compute a medium value
*/
static int apm_update(void) {
FILE *fp;
char buf[101];
/***** APM SCAN *****/
int ignore;
unsigned int ignore2;
char ignore3[101];
unsigned int batt_flag;
clog(LOG_DEBUG, "called\n");
fp = fopen(APM_PROC_FILE , "r");
if (!fp) {
clog(LOG_ERR, "%s: %s\n", APM_PROC_FILE, strerror(errno));
return -1;
}
if (!fgets(buf, 100, fp)) {
fclose(fp);
clog(LOG_ERR, "%s: %s\n", APM_PROC_FILE, strerror(errno));
return -1;
}
sscanf(buf, "%s %d.%d %x %x %x %x %d%% %d %s\n",
ignore3, &ignore, &ignore,
&ignore2, &ac_state, &ignore2, &batt_flag,
&battery_percent, &ignore, ignore3);
if (battery_percent > 100) {
battery_percent = -1;
}
battery_present = batt_flag < 128;
fclose(fp);
clog(LOG_INFO, "battery %s - %d - ac: %s\n",
battery_present?"present":"absent",
battery_percent,
ac_state?"on-line":"off-line");
return 0;
}
/*
* parse the 'ac' keywork
*/
static int apm_ac_parse(const char *ev, void **obj) {
unsigned int *ret = malloc(sizeof(int));
if (ret == NULL) {
clog(LOG_ERR, "couldn't make enough room for ac_status (%s)\n",
strerror(errno));
return -1;
}
*ret = 0;
clog(LOG_DEBUG, "called with %s\n", ev);
if (strncmp(ev, "on", 2) == 0) {
*ret = PLUGGED;
} else if (strncmp(ev, "off", 3) == 0) {
*ret = UNPLUGGED;
} else {
clog(LOG_ERR, "couldn't parse %s\n", ev);
free(ret);
return -1;
}
clog(LOG_INFO, "parsed %s\n", *ret==PLUGGED ? "on" : "off");
*obj = ret;
return 0;
}
/*
* evaluate the 'ac' keywork
*/
static int apm_ac_evaluate(const void *s) {
const unsigned int *ac = (const unsigned int *)s;
clog(LOG_DEBUG, "called %s [%s]\n",
*ac==PLUGGED ? "on" : "off", ac_state==PLUGGED ? "on" : "off");
return (*ac == ac_state) ? MATCH : DONT_MATCH;
}
/*
* parse the 'battery' keywork
*/
static int apm_bat_parse(const char *ev, void **obj) {
struct battery_interval *ret = malloc(sizeof(struct battery_interval));
if (ret == NULL) {
clog(LOG_ERR, "couldn't make enough room for battery_interval (%s)\n",
strerror(errno));
return -1;
}
ret->min = ret->max = 0;
clog(LOG_DEBUG, "called with %s\n", ev);
if (sscanf(ev, "%d-%d", &(ret->min), &(ret->max)) != 2) {
clog(LOG_ERR, "wrong parameter %s\n", ev);
free(ret);
return -1;
}
clog(LOG_INFO, "parsed %d-%d\n", ret->min, ret->max);
*obj = ret;
return 0;
}
/*
* evaluate the 'battery' keywork
*/
static int apm_bat_evaluate(const void *s) {
const struct battery_interval *bi = (const struct battery_interval *)s;
clog(LOG_DEBUG, "called %d-%d [%d]\n", bi->min, bi->max, battery_percent);
return (battery_percent>=bi->min && battery_percent<=bi->max) ? MATCH : DONT_MATCH;
}
static struct cpufreqd_keyword kw[] = {
{ .word = "ac", .parse = &apm_ac_parse, .evaluate = &apm_ac_evaluate },
{ .word = "battery_interval", .parse = &apm_bat_parse, .evaluate = &apm_bat_evaluate },
{ .word = NULL, .parse = NULL, .evaluate = NULL }
};
static struct cpufreqd_plugin apm = {
.plugin_name = "apm_plugin", /* plugin_name */
.keywords = kw, /* config_keywords */
.plugin_init = &apm_init, /* plugin_init */
.plugin_exit = &apm_exit, /* plugin_exit */
.plugin_update = &apm_update /* plugin_update */
};
struct cpufreqd_plugin *create_plugin (void) {
return &apm;
}
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