From 02183cf8a39fe95d999bd5a3c982f2fb10ed0dba Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@open-infrastructure.net>
Date: Sun, 5 Jun 2022 07:21:57 +0200
Subject: Automatically restoring previous state after reboot by using
 last-on/last-off config options, thanks to Sakirnth Nagarasa
 <sakirnth@gmail.com> for the use-case and idea.

Signed-off-by: Daniel Baumann <daniel.baumann@open-infrastructure.net>
---
 libexec/container/auto  | 55 ++++++++++++++++++++++++++++++++++++-------------
 libexec/container/build |  2 +-
 libexec/container/stop  | 21 ++++++++++++++++---
 3 files changed, 60 insertions(+), 18 deletions(-)

(limited to 'libexec/container')

diff --git a/libexec/container/auto b/libexec/container/auto
index 461e67d..83c5c50 100755
--- a/libexec/container/auto
+++ b/libexec/container/auto
@@ -109,25 +109,52 @@ case "${FORCE}" in
 		;;
 esac
 
-case "${ACTION}" in
-	stop)
-		OPTIONS="${OPTIONS} -f"
-		;;
-esac
-
 for FILE in "${CONFIG}"/*.conf
 do
-	if grep -Eqs "^ *cnt.auto=force-true" "${FILE}"
+	if ! grep -Eqs "^ *cnt.container-server=${HOST}" "${FILE}"
 	then
-		OPTIONS="${OPTIONS} -f"
+		continue
 	fi
 
-	if grep -Eqs "^ *cnt.auto=(force-true|true)" "${FILE}" && grep -Eqs "^ *cnt.container-server=${HOST}" "${FILE}"
-	then
-		CONTAINER="$(basename ${FILE} .conf)"
-
-		cnt ${ACTION} -n ${CONTAINER} ${OPTIONS} || true
-	fi
+	CONTAINER="$(basename ${FILE} .conf)"
+	CNT_AUTO="$(grep -Es "^ *cnt.auto=" ${FILE} | awk -F= '{ print $2 }')"
+
+	case "${ACTION}" in
+		start)
+			case "${CNT_AUTO}" in
+				force-true)
+					OPTIONS="${OPTIONS} -f"
+
+					cnt ${ACTION} -n ${CONTAINER} ${OPTIONS} || true
+					;;
+
+				last-on)
+					if grep -qs start "/var/lib/${SOFTWARE}/state/${CONTAINER}.run" || \
+					   [ ! -e "/var/lib/${SOFTWARE}/state/${CONTAINER}.run" ]
+					then
+						cnt start -n ${CONTAINER} ${OPTIONS} -f || true
+					fi
+					;;
+
+				last-off)
+					if grep -qs start "/var/lib/${SOFTWARE}/state/${CONTAINER}.run"
+					then
+						cnt start -n ${CONTAINER} ${OPTIONS} -f || true
+					fi
+					;;
+
+				true)
+					cnt ${ACTION} -n ${CONTAINER} ${OPTIONS} || true
+					;;
+			esac
+			;;
+
+		stop)
+			OPTIONS="${OPTIONS} -f --stateless"
+
+			cnt ${ACTION} -n ${CONTAINER} ${OPTIONS} || true
+			;;
+	esac
 done
 
 # Post hooks
diff --git a/libexec/container/build b/libexec/container/build
index 48f2d4b..2c29730 100755
--- a/libexec/container/build
+++ b/libexec/container/build
@@ -123,7 +123,7 @@ Parameters ()
 
 Usage ()
 {
-	echo "Usage: ${PROGRAM} ${COMMAND} -n|--name NAME [--cnt.auto=true|false|force-true] [--cnt.container-server=true|false|FQDN] [--cnt.overlay=DIRECTORY_LOWER:DIRECTORY_UPPER:DIRECTORY_WORK:DIRECTORY_MERGED] [--cnt.overlay-options=OPTION[,OPTION]] [--cnt.start=OPTION[,OPTION]] [-b|--bind DIRECTORY:DIRECTORY[:OPTIONS]] [--bind-ro DIRECTORY:DIRECTORY[:OPTIONS]] [-c|--capability CAPABILITY[,CAPABILITY]] [-d|--drop-capability DROP_CAPABILITY[,DROP_CAPABILITY]] [-s|--script SCRIPT] [-v|--verbose] [-- SCRIPT_OPTIONS]" >&2
+	echo "Usage: ${PROGRAM} ${COMMAND} -n|--name NAME [--cnt.auto=true|false|force-true|last-on|last-off] [--cnt.container-server=true|false|FQDN] [--cnt.overlay=DIRECTORY_LOWER:DIRECTORY_UPPER:DIRECTORY_WORK:DIRECTORY_MERGED] [--cnt.overlay-options=OPTION[,OPTION]] [--cnt.start=OPTION[,OPTION]] [-b|--bind DIRECTORY:DIRECTORY[:OPTIONS]] [--bind-ro DIRECTORY:DIRECTORY[:OPTIONS]] [-c|--capability CAPABILITY[,CAPABILITY]] [-d|--drop-capability DROP_CAPABILITY[,DROP_CAPABILITY]] [-s|--script SCRIPT] [-v|--verbose] [-- SCRIPT_OPTIONS]" >&2
 	echo
 	echo "See ${COMMAND}(1), ${PROGRAM}(1) and ${PROJECT}(7) for more information."
 
diff --git a/libexec/container/stop b/libexec/container/stop
index 793b323..8ca98ce 100755
--- a/libexec/container/stop
+++ b/libexec/container/stop
@@ -34,7 +34,7 @@ Parameters ()
 {
 	OPTIONS_ALL=""
 
-	GETOPT_LONGOPTIONS="name:,force,interactive,kill,clean,verbose,"
+	GETOPT_LONGOPTIONS="name:,force,interactive,kill,clean,stateless,verbose,"
 	GETOPT_OPTIONS="n:,f,i,k,v,"
 
 	PARAMETERS="$(getopt --longoptions ${GETOPT_LONGOPTIONS} --name=${COMMAND} --options ${GETOPT_OPTIONS} --shell sh -- ${@})"
@@ -84,6 +84,14 @@ Parameters ()
 				OPTONS_ALL="${OPTIONS_ALL} --clean"
 				;;
 
+			--stateless)
+				# internal option
+				STATELESS="true"
+				shift 1
+
+				OPTIONS_ALL="${OPTIONS_ALL} --stateless"
+				;;
+
 			-v|--verbose)
 				VERBOSE="true"
 				shift 1
@@ -326,8 +334,15 @@ case "${KILL}" in
 		;;
 esac
 
-mkdir -p "/var/lib/${SOFTWARE}/state"
-echo "stop" > "/var/lib/${SOFTWARE}/state/${NAME}.run"
+case "${STATELESS}" in
+	true)
+		;;
+
+	*)
+		mkdir -p "/var/lib/${SOFTWARE}/state"
+		echo "stop" > "/var/lib/${SOFTWARE}/state/${NAME}.run"
+		;;
+esac
 
 case "${VERBOSE}" in
 	true)
-- 
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