Make sysfs behave like netmount and localmount

sysfs now mounts all related sysfs file systems and returns success,
like netmount and localmount.

Also, we now check to make sure the cgroups are not mounted before we
mount them.

X-Gentoo-Bug: 530138
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=530138

Makefile.inc

@@ -1,3 +1,3 @@
 NAME=		openrc
-VERSION=	0.13.4
+VERSION=	0.13.6
 PKG=		${NAME}-${VERSION}

init.d/devfs.in

@@ -69,7 +69,14 @@ seed_dev()
 	# so udev can add its start-message to dmesg
 	[ -c /dev/kmsg ] || mknod -m 660 /dev/kmsg c 1 11
 
-	# Mount required stuff as user may not have then in /etc/fstab
+	# extra symbolic links not provided by default
+	[ -e /dev/fd ] || ln -snf /proc/self/fd /dev/fd
+	[ -e /dev/stdin ] || ln -snf /proc/self/fd/0 /dev/stdin
+	[ -e /dev/stdout ] || ln -snf /proc/self/fd/1 /dev/stdout
+	[ -e /dev/stderr ] || ln -snf /proc/self/fd/2 /dev/stderr
+	[ -e /proc/kcore ] && ln -snf /proc/kcore /dev/core
+
+	# Mount required directories as user may not have them in /etc/fstab
 	for x in \
 		"mqueue /dev/mqueue 1777 ,nodev mqueue" \
 		"devpts /dev/pts 0755 ,gid=5,mode=0620 devpts" \

init.d/sysfs.in

@@ -113,7 +113,8 @@ mount_cgroups()
 	yesno ${rc_controller_cgroups:-YES} && [ -e /proc/cgroups ] || return 0
 	while read name hier groups enabled rest; do
 		case "${enabled}" in
-			1)	mkdir /sys/fs/cgroup/${name}
+			1)	mountinfo -q /sys/fs/cgroup/${name} && continue
+				mkdir /sys/fs/cgroup/${name}
 				mount -n -t cgroup -o ${sysfs_opts},${name} \
 					${name} /sys/fs/cgroup/${name}
 				;;
@@ -129,25 +130,13 @@ restorecon_sys()
 		restorecon -rF /sys/fs/cgroup >/dev/null 2>&1
 		eend $?
 	fi
-
-	return 0
 }
 
 start()
 {
-	local retval
 	mount_sys
-	retval=$?
-	if [ $retval -eq 0 ]; then
-		mount_misc
-		retval=$?
-	fi
-	if [ $retval -eq 0 ]; then
-		mount_cgroups
-		retval=$?
-	fi
-
+	mount_misc
+	mount_cgroups
 	restorecon_sys
-
-	return $retval
+	return 0
 }