Update ChangeLog

In hybrid mode, we should not try to mount cgroup2 if it is not
available in the kernel.

This fixes #164.

ChangeLog

@@ -1,3 +1,34 @@
+commit 2a203b9b6e91e4ed140750eb9223012035870864
+Author: William Hubbs <w.d.hubbs@gmail.com>
+Commit: William Hubbs <w.d.hubbs@gmail.com>
+
+    sysfs: fix cgroup hybrid mode
+    
+    In hybrid mode, we should not try to mount cgroup2 if it is not
+    available in the kernel.
+    
+    This fixes #164.
+
+commit a769ea1b92f47254edf11458d2c8b79d3819e0e6
+Author: William Hubbs <w.d.hubbs@gmail.com>
+Commit: William Hubbs <w.d.hubbs@gmail.com>
+
+    cgroup2_find_path: use legacy mode if cgroup2 is not in the kernel
+    
+    This is related to #164.
+
+commit 6f564b59cc15e688b2fa0758fa9797632e0751d7
+Author: William Hubbs <w.d.hubbs@gmail.com>
+Commit: William Hubbs <w.d.hubbs@gmail.com>
+
+    version 0.31.1
+
+commit e312e569970c74cf52e255da67034391b68dafac
+Author: William Hubbs <w.d.hubbs@gmail.com>
+Commit: William Hubbs <w.d.hubbs@gmail.com>
+
+    Update ChangeLog
+
 commit 2f60a959b442866b0e879d83f2732c4fa3ed3f7d
 Author: William Hubbs <w.d.hubbs@gmail.com>
 Commit: William Hubbs <w.d.hubbs@gmail.com>
@@ -1421,18 +1452,3 @@ Commit: William Hubbs <w.d.hubbs@gmail.com>
     now have a request to enable it.
     
     This fixes #24.
-
-commit c146b966913ae80652e3be925d3aba60ed82f14d
-Author: William Hubbs <w.d.hubbs@gmail.com>
-Commit: William Hubbs <w.d.hubbs@gmail.com>
-
-    Add command_progress variable
-    
-    If this is set to yes, 1, true, or on, start-stop-daemon will display a
-    progress meter while waiting for a daemon to stop.
-
-commit 6cabaf274defa11773094a2c85b3d0a9f0bd9b08
-Author: Doug Freed <dwfreed@mtu.edu>
-Commit: Doug Freed <dwfreed@mtu.edu>
-
-    rc-misc: allow EINFO_VERBOSE through too

Makefile.inc

@@ -1,3 +1,3 @@
 NAME=		openrc
-VERSION=	0.31
+VERSION=	0.31.1
 PKG=		${NAME}-${VERSION}

init.d/sysfs.in

@@ -150,6 +150,16 @@ cgroup1_controllers()
 	return 0
 }
 
+cgroup2_base()
+{
+	local base
+	base="$(cgroup2_find_path)"
+	mkdir -p "${base}"
+	mount -t cgroup2 none -o "${sysfs_opts},nsdelegate" "${base}" 2> /dev/null ||
+		mount -t cgroup2 none -o "${sysfs_opts}" "${base}"
+	return 0
+}
+
 cgroup2_controllers()
 {
 	local active cgroup_path x y
@@ -169,13 +179,12 @@ cgroup2_controllers()
 
 cgroups_hybrid()
 {
-	grep -qw cgroup /proc/filesystems &&
-		grep -qw cgroup2 /proc/filesystems ||
-		return 0
+	grep -qw cgroup /proc/filesystems || return 0
 	cgroup1_base
-	mkdir /sys/fs/cgroup/unified
-	mount -t cgroup2 none -o "${sysfs_opts},nsdelegate" /sys/fs/cgroup/unified
-	cgroup2_controllers
+	if grep -qw cgroup2 /proc/filesystems; then
+		cgroup2_base
+		cgroup2_controllers
+	fi
 	cgroup1_controllers
 	return 0
 }
@@ -190,8 +199,8 @@ cgroups_legacy()
 
 cgroups_unified()
 {
-	grep -qw cgroup2 /proc/filesystems || return 0
-	mount -t cgroup2 none -o "${sysfs_opts},nsdelegate" /sys/fs/cgroup
+	cgroup2_base
+	cgroup2_controllers
 	return 0
 }
 

sh/rc-cgroup.sh.in

@@ -146,10 +146,12 @@ cgroup_set_limits()
 
 cgroup2_find_path()
 {
-	case "${rc_cgroup_mode:-hybrid}" in
-		hybrid) printf "/sys/fs/cgroup/unified" ;;
-		unified) printf "/sys/fs/cgroup" ;;
+	if grep -qw cgroup2 /proc/filesystems; then
+		case "${rc_cgroup_mode:-hybrid}" in
+			hybrid) printf "/sys/fs/cgroup/unified" ;;
+			unified) printf "/sys/fs/cgroup" ;;
 		esac
+	fi
 		return 0
 }
 
@@ -180,7 +182,7 @@ cgroup2_set_limits()
 {
 	local cgroup_path
 	cgroup_path="$(cgroup2_find_path)"
-	[ -z "${cgroup_path}" ] && return 0
+	[ -d "${cgroup_path}" ] || return 0
 	rc_cgroup_path="${cgroup_path}/${RC_SVCNAME}"
 	local OIFS="$IFS"
 	IFS="