|
 |
ac3a84 |
From 2ac7d7a818788110342a99978680485fbe27cc25 Mon Sep 17 00:00:00 2001
|
|
|
ac3a84 |
From: Yu Watanabe <watanabe.yu+github@gmail.com>
|
|
|
ac3a84 |
Date: Fri, 11 Nov 2022 13:54:03 +0900
|
|
|
ac3a84 |
Subject: [PATCH] ac-power: check battery existence and status
|
|
|
ac3a84 |
|
|
|
ac3a84 |
If a battery is not present or its status is not discharging, then
|
|
|
ac3a84 |
the battery should not be used as a power source.
|
|
|
ac3a84 |
Let's count batteries currently discharging.
|
|
|
ac3a84 |
|
|
|
ac3a84 |
Fixes #25316.
|
|
|
ac3a84 |
|
|
|
ac3a84 |
(cherry picked from commit 1c03f7f4ba419aa65997e90accc0d935ae1cfbc5)
|
|
|
ac3a84 |
|
|
|
ac3a84 |
Related: #2138081
|
|
|
ac3a84 |
---
|
|
|
ac3a84 |
src/shared/udev-util.c | 58 ++++++++++++++++++++++++++++++++----------
|
|
|
ac3a84 |
1 file changed, 44 insertions(+), 14 deletions(-)
|
|
|
ac3a84 |
|
|
|
ac3a84 |
diff --git a/src/shared/udev-util.c b/src/shared/udev-util.c
|
|
|
ac3a84 |
index aac02cd61b..7d95353452 100644
|
|
|
ac3a84 |
--- a/src/shared/udev-util.c
|
|
|
ac3a84 |
+++ b/src/shared/udev-util.c
|
|
|
ac3a84 |
@@ -642,9 +642,46 @@ static int device_is_power_sink(sd_device *device) {
|
|
|
ac3a84 |
return found_sink || !found_source;
|
|
|
ac3a84 |
}
|
|
|
ac3a84 |
|
|
|
ac3a84 |
+static bool battery_is_discharging(sd_device *d) {
|
|
|
ac3a84 |
+ const char *val;
|
|
|
ac3a84 |
+ int r;
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
+ assert(d);
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
+ r = sd_device_get_sysattr_value(d, "scope", &val;;
|
|
|
ac3a84 |
+ if (r < 0) {
|
|
|
ac3a84 |
+ if (r != -ENOENT)
|
|
|
ac3a84 |
+ log_device_debug_errno(d, r, "Failed to read 'scope' sysfs attribute, ignoring: %m");
|
|
|
ac3a84 |
+ } else if (streq(val, "Device")) {
|
|
|
ac3a84 |
+ log_device_debug(d, "The power supply is a device battery, ignoring device.");
|
|
|
ac3a84 |
+ return false;
|
|
|
ac3a84 |
+ }
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
+ r = device_get_sysattr_bool(d, "present");
|
|
|
ac3a84 |
+ if (r < 0)
|
|
|
ac3a84 |
+ log_device_debug_errno(d, r, "Failed to read 'present' sysfs attribute, assuming the battery is present: %m");
|
|
|
ac3a84 |
+ else if (r == 0) {
|
|
|
ac3a84 |
+ log_device_debug(d, "The battery is not present, ignoring the power supply.");
|
|
|
ac3a84 |
+ return false;
|
|
|
ac3a84 |
+ }
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
+ /* Possible values: "Unknown", "Charging", "Discharging", "Not charging", "Full" */
|
|
|
ac3a84 |
+ r = sd_device_get_sysattr_value(d, "status", &val;;
|
|
|
ac3a84 |
+ if (r < 0) {
|
|
|
ac3a84 |
+ log_device_debug_errno(d, r, "Failed to read 'status' sysfs attribute, assuming the battery is discharging: %m");
|
|
|
ac3a84 |
+ return true;
|
|
|
ac3a84 |
+ }
|
|
|
ac3a84 |
+ if (!streq(val, "Discharging")) {
|
|
|
ac3a84 |
+ log_device_debug(d, "The battery status is '%s', assuming the battery is not used as a power source of this machine.", val);
|
|
|
ac3a84 |
+ return false;
|
|
|
ac3a84 |
+ }
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
+ return true;
|
|
|
ac3a84 |
+}
|
|
|
ac3a84 |
+
|
|
|
ac3a84 |
int on_ac_power(void) {
|
|
|
ac3a84 |
_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
|
|
|
ac3a84 |
- bool found_ac_online = false, found_battery = false;
|
|
|
ac3a84 |
+ bool found_ac_online = false, found_discharging_battery = false;
|
|
|
ac3a84 |
sd_device *d;
|
|
|
ac3a84 |
int r;
|
|
|
ac3a84 |
|
|
|
ac3a84 |
@@ -686,17 +723,10 @@ int on_ac_power(void) {
|
|
|
ac3a84 |
}
|
|
|
ac3a84 |
|
|
|
ac3a84 |
if (streq(val, "Battery")) {
|
|
|
ac3a84 |
- r = sd_device_get_sysattr_value(d, "scope", &val;;
|
|
|
ac3a84 |
- if (r < 0) {
|
|
|
ac3a84 |
- if (r != -ENOENT)
|
|
|
ac3a84 |
- log_device_debug_errno(d, r, "Failed to read 'scope' sysfs attribute, ignoring: %m");
|
|
|
ac3a84 |
- } else if (streq(val, "Device")) {
|
|
|
ac3a84 |
- log_device_debug(d, "The power supply is a device battery, ignoring device.");
|
|
|
ac3a84 |
- continue;
|
|
|
ac3a84 |
+ if (battery_is_discharging(d)) {
|
|
|
ac3a84 |
+ found_discharging_battery = true;
|
|
|
ac3a84 |
+ log_device_debug(d, "The power supply is a battery and currently discharging.");
|
|
|
ac3a84 |
}
|
|
|
ac3a84 |
-
|
|
|
ac3a84 |
- found_battery = true;
|
|
|
ac3a84 |
- log_device_debug(d, "The power supply is battery.");
|
|
|
ac3a84 |
continue;
|
|
|
ac3a84 |
}
|
|
|
ac3a84 |
|
|
|
ac3a84 |
@@ -713,11 +743,11 @@ int on_ac_power(void) {
|
|
|
ac3a84 |
if (found_ac_online) {
|
|
|
ac3a84 |
log_debug("Found at least one online non-battery power supply, system is running on AC.");
|
|
|
ac3a84 |
return true;
|
|
|
ac3a84 |
- } else if (found_battery) {
|
|
|
ac3a84 |
- log_debug("Found battery and no online power sources, assuming system is running from battery.");
|
|
|
ac3a84 |
+ } else if (found_discharging_battery) {
|
|
|
ac3a84 |
+ log_debug("Found at least one discharging battery and no online power sources, assuming system is running from battery.");
|
|
|
ac3a84 |
return false;
|
|
|
ac3a84 |
} else {
|
|
|
ac3a84 |
- log_debug("No power supply reported online and no battery, assuming system is running on AC.");
|
|
|
ac3a84 |
+ log_debug("No power supply reported online and no discharging battery found, assuming system is running on AC.");
|
|
|
ac3a84 |
return true;
|
|
|
ac3a84 |
}
|
|
|
ac3a84 |
}
|