Add autosuspend conf and scripts (from Dustin Nguyen and Florian Schm…

…aus)

autosuspend/autosuspend.conf

@@ -0,0 +1,41 @@
+[general]
+interval = 120
+idle_time = 900
+suspend_cmd = /etc/autosuspend/suspend
+wakeup_cmd = /etc/autosuspend/wakeup {timestamp:.0f}
+woke_up_file = /var/run/autosuspend-just-woke-up
+lock_file = /var/lock/autosuspend.lock
+lock_timeout = 30
+# Can be used to call a command before suspending, either with scheduled wake up or not.
+# notify_cmd_wakeup = su myuser -c notify-send -a autosuspend 'Suspending the system. Wake up at {iso}'
+# notify_cmd_no_wakeup = su myuser -c notify-send -a autosuspend 'Suspending the system.'
+
+[check.LogindSessionsIdle]
+enabled = true
+
+# Incoming SSH connections also prevent automatic suspension of the
+# system.
+[check.ActiveConnection]
+enabled = true
+ports = 22
+
+[check.ExternalCommand]
+enabled = true
+command = /etc/autosuspend/activity-check
+
+# Do not interrupt run-fai with a suspend
+[check.RunFai]
+enabled = true
+class = Processes
+processes = fai
+
+[wakeup.RunFai]
+# check when the next run of run-fai.service is scheduled and set an apropriate wakeup-time
+enabled = true
+class = Command
+command = /etc/autosuspend/wakeup-run-fai
+
+[wakeup.BeforeScheduledReboot]
+enabled = true
+class = Command
+command = /etc/autosuspend/wakeup-before-scheduled-reboot

autosuspend/scripts/activity-check

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+ACTIVITY_CHECK_DIR=/etc/autosuspend/activity-check.d
+
+if [[ ! -d "${ACTIVITY_CHECK_DIR}" ]]; then
+	# autosuspend assumes that the system is active if the exit status
+	# is zero, or inactive otherwise. If there is no
+	# ACTIVITY_CHECK_DIR, then the system is assumed to be inactive,
+	# hence we return 1 here.
+	exit 1
+fi
+
+shopt -s nullglob
+for FILE in "${ACTIVITY_CHECK_DIR}"/*; do
+	if [[ ! -x "${FILE}" ]]; then
+		continue
+	fi
+
+	if [[ "${FILE}" == *.pre_fcopy ]]; then
+		continue
+	fi
+
+	if "${FILE}"; then
+		# Executing FILE returned a zero exit status, that means the
+		# system is active and we do not need to check more scripts.
+		exit
+	fi
+done
+
+# No script signalled that the system is active. Return a non-zero
+# value to signal that it is inactive.
+exit 1

autosuspend/scripts/activity-check.d/inhibit-autosuspend-flag-file

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+readonly INHIBIT_AUTOSUSPEND_FLAG_FILE="/var/tmp/inhibit-autosuspend"
+
+if [[ ! -f "${INHIBIT_AUTOSUSPEND_FLAG_FILE}" ]]; then
+	exit 1
+fi
+
+FLAG_FILE_LAST_MODIFICATION=$(stat -c "%Y" "${INHIBIT_AUTOSUSPEND_FLAG_FILE}")
+NOW=$(date +"%S")
+
+FLAG_FILE_AGE_SECONDS=$(( ${NOW} - ${FLAG_FILE_LAST_MODIFICATION} ))
+
+if [[ ${FLAG_FILE_AGE_SECONDS} -gt 259200 ]]; then
+	echo "${INHIBIT_AUTOSUSPEND_FLAG_FILE} was last touched three days ago. Going to remove and ignore the file"
+	rm "${INHIBIT_AUTOSUSPEND_FLAG_FILE}"
+	exit 1
+fi
+
+echo "${INHIBIT_AUTOSUSPEND_FLAG_FILE} found, signalling that the system is active"
+exit 0

autosuspend/scripts/activity-check.d/inhibit-autosuspend-flag-file.pre_fcopy

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+readonly INHIBIT_AUTOSUSPEND_FLAG_FILE="/var/tmp/inhibit-autosuspend"
+
+if [[ ! -f "${INHIBIT_AUTOSUSPEND_FLAG_FILE}" ]]; then
+	exit 1
+fi
+
+FLAG_FILE_LAST_MODIFICATION=$(stat -c "%Y" "${INHIBIT_AUTOSUSPEND_FLAG_FILE}")
+NOW=$(date +"%S")
+
+FLAG_FILE_AGE_SECONDS=$(( ${NOW} - ${FLAG_FILE_LAST_MODIFICATION} ))
+
+if [[ ${FLAG_FILE_AGE_SECONDS} -gt 4320 ]]; then
+	echo "${INHIBIT_AUTOSUSPEND_FLAG_FILE} was last touched three days ago. Going to remove and ignore the file"
+	rm "${INHIBIT_AUTOSUSPEND_FLAG_FILE}"
+	exit 1
+fi
+
+echo "${INHIBIT_AUTOSUSPEND_FLAG_FILE} found, signalling that the system is active"
+exit 0

autosuspend/scripts/activity-check.d/logind-idle-hint

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Although autosuspend's LogindSessionsIdle should check the IdleHint,
+# this appears to be, at least sometimes, not reliable. I suspect it
+# may because autosuspend uses
+#     if not properties["IdleHint"]:
+#        return "Login session {} is not idle".format(session_id)
+# https://github.com/languitar/autosuspend/blob/c7f06a27db37f2a4ed04b596427da52fd1192935/src/autosuspend/checks/systemd.py#L112-L113
+# which does not check if the value of IdleHint is 'true' or
+# 'false'. Until autosuspend's LogindSessionsIdle check is reliable,
+# we use the little script below to see if there is a session with
+# IdleHint=no.
+# See https://github.com/languitar/autosuspend/pull/225
+
+for SESSION_ID in $(loginctl list-sessions --no-legend | awk '{ print $1 }'); do
+    IDLE_HINT=$(loginctl show-session $SESSION_ID -P IdleHint)
+
+    if [[ "${IDLE_HINT}" == no ]]; then
+        echo "Session $SESSION_ID is not idle"
+        exit 0
+    fi
+done
+
+exit 1

autosuspend/scripts/activity-check.d/logind-idle-hint.pre_fcopy

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Although autosuspend's LogindSessionsIdle should check the IdleHint,
+# this appears to be, at least sometimes, not reliable. I suspect it
+# may because autosuspend uses
+#     if not properties["IdleHint"]:
+#        return "Login session {} is not idle".format(session_id)
+# https://github.com/languitar/autosuspend/blob/c7f06a27db37f2a4ed04b596427da52fd1192935/src/autosuspend/checks/systemd.py#L112-L113
+# which does not check if the value of IdleHint is 'true' or
+# 'false'. Until autosuspend's LogindSessionsIdle check is reliable,
+# we use the little script below to see if there is a session with
+# IdleHint=no.
+# See https://github.com/languitar/autosuspend/pull/225
+
+for SESSION_ID in $(loginctl list-sessions --no-legend | awk '{ print $1 }'); do
+    IDLE_HINT=$(loginctl show-session $SESSION_ID -p IdleHint)
+    IDLE_HINT="${IDLE_HINT#IdleHint=}"
+
+    if [[ "${IDLE_HINT}" == no ]]; then
+        echo "Session $SESSION_ID is not idle"
+        exit 0
+    fi
+done
+
+exit 1

autosuspend/scripts/activity-check.pre_fcopy

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+ACTIVITY_CHECK_DIR=/etc/autosuspend/activity-check.d
+
+if [[ ! -d "${ACTIVITY_CHECK_DIR}" ]]; then
+	# autosuspend assumes that the system is active if the exit status
+	# is zero, or inactive otherwise. If there is no
+	# ACTIVITY_CHECK_DIR, then the system is assumed to be inactive,
+	# hence we return 1 here.
+	exit 1
+fi
+
+shopt -s nullglob
+for FILE in "${ACTIVITY_CHECK_DIR}"/*; do
+	if [[ ! -x "${FILE}" ]]; then
+		continue
+	fi
+
+	if "${FILE}"; then
+		# Executing FILE returned a zero exit status, that means the
+		# system is active and we do not need to check more scripts.
+		exit
+	fi
+done
+
+# No script signalled that the system is active. Return a non-zero
+# value to signal that it is inactive.
+exit 1

autosuspend/scripts/suspend

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+exec /bin/systemctl suspend

autosuspend/scripts/wakeup

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+TIMESTAMP="${1}"
+
+readonly WAKEALARM="/sys/class/rtc/rtc0/wakealarm"
+
+# One has to write '0' to the pseudo file before setting a new alarm
+# time.
+echo 0 > "${WAKEALARM}"
+echo "${TIMESTAMP}" > "${WAKEALARM}"

autosuspend/scripts/wakeup-before-scheduled-reboot

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+# Although this file is called wakeup-before-scheduled-reboot we
+# actually check for the next scheduled reboot *or* shutdown. But this
+# does not really matter, as we want to wakeup in both cases and we
+# only schedule reboots.
+SCHEDULED_SHUTDOWN_INFO=$(busctl get-property org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager ScheduledShutdown)
+
+declare -i SCHEDULED_SHUTDOWN_SECS
+SCHEDULED_SHUTDOWN_SECS=$(echo "${SCHEDULED_SHUTDOWN_INFO}" | cut -d ' ' -f 3)
+
+if [[ ${SCHEDULED_SHUTDOWN_SECS} -eq 0 ]]; then
+	# Output nothing to make autosuspend happy.
+	echo ""
+	exit
+fi
+
+BEFORE_SCHEDULED_SHUTDOWN_SECS=$(( SCHEDULED_SHUTDOWN_SECS - 180 ))
+
+echo "${BEFORE_SCHEDULED_SHUTDOWN_SECS}"

autosuspend/scripts/wakeup-run-fai

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+export LANG=C
+export LC_TIME=C
+
+NEXT_FAI_RUN_AT=$(systemctl show run-fai.timer --property=NextElapseUSecRealtime --value | cut -d' ' -f 2-)
+
+declare -i NEXT_FAI_RUN_AT_EPOCH_SECS
+NEXT_FAI_RUN_AT_EPOCH_SECS=$(date -d "${NEXT_FAI_RUN_AT}" +%s)
+
+declare -i ADD_DAYS=3
+declare -i EXTRA_SECS=$(( ADD_DAYS * 24 * 60 * 60 ))
+
+declare -i WAKEUP_EPOCH_SECS=$(( NEXT_FAI_RUN_AT_EPOCH_SECS + EXTRA_SECS ))
+
+echo "${WAKEUP_EPOCH_SECS}"

autosuspend/scripts/wakeup-run-fai.pre_fcopy

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+export LANG=C
+export LC_TIME=C
+
+NEXT_FAI_RUN_AT=$(systemctl show run-fai.timer --property=NextElapseUSecRealtime --value | cut -d' ' -f 2-)
+
+date -d "${NEXT_FAI_RUN_AT}" +%s