add support for -containers keyword

man/openrc-run.8

@@ -227,6 +227,9 @@ Same as -jail, but for Xen DOM0 systems.
 Same as -jail, but for Xen DOMU systems.
 .It Dv -docker
 Same as -jail, but for docker systems.
+.It Dv -containers
+Same as -jail, but for all relevant container types on the operating
+system.
 .El
 .El
 .Pp

sh/gendepends.sh.in

@@ -29,7 +29,18 @@ provide() {
 	[ -n "$*" ] && echo "$RC_SVCNAME iprovide $*" >&3
 }
 keyword() {
-	[ -n "$*" ] && echo "$RC_SVCNAME keyword $*" >&3
+	local c x
+	set -- $*
+	while [ -n "$*" ]; do
+		case "$1" in
+			-containers) x="$(_get_containers)" ;;
+			!-containers) x="$(_get_containers_remove)" ;;
+			*) x=$1 ;;
+		esac
+		c="${c}${x} "
+		shift
+	done
+	[ -n "$c" ] && echo "$RC_SVCNAME keyword $c" >&3
 }
 depend() {
 	:

sh/openrc-run.sh.in

@@ -79,7 +79,18 @@ provide() {
 	[ -n "$*" ] && echo "provide $*"
 }
 keyword() {
-	[ -n "$*" ] && echo "keyword $*"
+	local c x
+	set -- $*
+	while [ -n "$*" ]; do
+		case "$1" in
+			-containers) x="$(_get_containers)" ;;
+			!-containers) x="$(_get_containers_remove)" ;;
+			*) x=$1 ;;
+		esac
+		c="${c}${x} "
+		shift
+	done
+	[ -n "$c" ] && echo "keyword $c"
 }
 
 # Describe the init script to the user

sh/rc-functions.sh.in

@@ -86,6 +86,27 @@ get_bootparam()
 }
 
 # Called from openrc-run.sh or gendepends.sh
+_get_containers() {
+	local c
+	case "${RC_UNAME}" in
+	FreeBSD)
+		c="-jail"
+		;;
+	Linux)
+		c="-docker -lxc -openvz -rkt -systemd-nspawn -uml -vserver"
+		;;
+	esac
+	echo $c
+}
+
+_get_containers_remove() {
+	local c
+	for x in $(_get_containers); do
+		c="${c}!${x} "
+	done
+	echo $c
+}
+
 _depend() {
 	depend
 	local _rc_svcname=$(shell_var "$RC_SVCNAME") _deptype= _depends=