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/* Not particularly good interface to hal, for programs that used to use
* apm.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <upower.h>
#include "apm.h"
#define MAX_RETRIES 3
static UpClient * up = NULL;
struct context {
int current;
int needed;
guint state;
int percentage;
gboolean ac;
int time;
};
static void get_devinfo(gpointer device, gpointer result)
{
gboolean online;
gdouble percentage;
guint state;
guint kind;
gint64 time_to_empty;
gint64 time_to_full;
struct context *ctx = result;
g_object_get(G_OBJECT(device), "percentage", &percentage,
"online", &online,
"state", &state,
"kind", &kind,
"time-to-empty", &time_to_empty,
"time-to-full", &time_to_full,
NULL);
if (kind == UP_DEVICE_KIND_BATTERY) {
if (ctx->current == ctx->needed) {
ctx->percentage = (int)percentage;
ctx->state = state;
if (time_to_empty) {
ctx->time = time_to_empty;
} else {
ctx->time = -time_to_full;
}
}
ctx->current++;
} else if (kind == UP_DEVICE_KIND_LINE_POWER) {
ctx->ac |= online;
}
}
int upower_supported(void)
{
if (!up) {
up = up_client_new();
}
if (!up) {
return 0;
} else {
#if UP_CHECK_VERSION(0, 99, 8)
g_autoptr(GPtrArray) devices = up_client_get_devices2(up);
#else
g_autoptr(GPtrArray) devices = up_client_get_devices(up);
#endif
if (!devices) {
return 0;
} else {
return 1;
}
}
}
/* Fill the passed apm_info struct. */
int upower_read(int battery, apm_info *info)
{
static int retries = 0;
if (!up) {
up = up_client_new();
}
if (!up) {
return -1;
}
#if !UP_CHECK_VERSION(0, 9, 99)
/* Allow a battery that was not present before to appear. */
up_client_enumerate_devices_sync(up, NULL, NULL);
#endif
#if UP_CHECK_VERSION(0, 99, 8)
/*
* up_client_get_devices was deprecated and replaced with
* up_client_get_devices2 in libupower 0.99.8.
*/
g_autoptr(GPtrArray) devices = up_client_get_devices2(up);
#else
g_autoptr(GPtrArray) devices = up_client_get_devices(up);
#endif
if (!devices) {
retries++;
if (retries < MAX_RETRIES)
return 0; /* fine immediately after hibernation */
else
return -1;
}
retries = 0;
info->battery_flags = 0;
info->using_minutes = 0;
struct context ctx = {
.current = 0,
.needed = battery - 1,
.state = UP_DEVICE_STATE_UNKNOWN,
.percentage = -1,
.ac = FALSE,
.time = -1
};
g_ptr_array_foreach(devices, &get_devinfo, &ctx);
info->ac_line_status = ctx.ac;
/* remaining_time and charge_level.percentage are not a mandatory
* keys, so if not present, -1 will be returned */
info->battery_time = ctx.time;
info->battery_percentage = ctx.percentage;
if (ctx.state == UP_DEVICE_STATE_DISCHARGING) {
info->battery_status = BATTERY_STATUS_CHARGING;
/* charge_level.warning and charge_level.low are not
* required to be available; this is good enough */
if (info->battery_percentage < 1) {
info->battery_status = BATTERY_STATUS_CRITICAL;
} else if (info->battery_percentage < 10) {
info->battery_status = BATTERY_STATUS_LOW;
}
} else if (info->ac_line_status && ctx.state == UP_DEVICE_STATE_CHARGING) {
info->battery_status = BATTERY_STATUS_CHARGING;
info->battery_flags = info->battery_flags | BATTERY_FLAGS_CHARGING;
} else if (info->ac_line_status) {
/* Must be fully charged. */
info->battery_status = BATTERY_STATUS_HIGH;
} else {
fprintf(stderr, "unknown battery state\n");
}
if (ctx.percentage < 0) {
info->battery_percentage = 0;
info->battery_time = 0;
info->battery_status = BATTERY_STATUS_ABSENT;
}
return 0;
}
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