SlugOS 5 - replace "mount -U" with "mount UUID=" which works with both mount

and busybox mount; also update boot/disk script to ensure that some key
devices exist in the new /dev which will enable booting to a virgin nfsroot.

4 files changed, 22 insertions, 8 deletions

diff --git a/packages/slugos-init/files/boot/disk b/packages/slugos-init/files/boot/disk
index d47be54c37..63370ce340 100644
--- a/packages/slugos-init/files/boot/disk
+++ b/packages/slugos-init/files/boot/disk
@@ -38,12 +38,13 @@ then
 	# is attempted.
 	if	test -n "$UUID" &&
 		mount "$@" UUID="$UUID" /mnt ||
-		mount "$@" -U "$UUID" /mnt ||
 		mount "$@" "$device" /mnt
 	then
-		# checkmount checks for sh, chroot, init
-		# and /mnt (i.e. /mnt/mnt in this case)
-		if checkmount /mnt
+		# checkmount checks for sh, chroot, init, /dev
+		# and /mnt (i.e. /mnt/mnt in this case).
+		# minimaldevnodes checks (and creates if required)
+		# a few mandatory /dev nodes we may need.
+		if checkmount /mnt && minimaldevnodes /mnt
 		then
 			# pivot to /initrd if available, else /mnt
 			cd /
diff --git a/packages/slugos-init/files/functions b/packages/slugos-init/files/functions
index 18f4009ee7..5b6b40b091 100644
--- a/packages/slugos-init/files/functions
+++ b/packages/slugos-init/files/functions
@@ -173,6 +173,7 @@ checkmount(){
 	# basic test for init (the kernel will try to load this)
 	# but require a shell in bin/sh too
 	test	\( -d "$1/mnt" \) -a \
+		\( -d "$1/dev" \) -a \
 		\( -x "$1/bin/sh" -o -h "$1/bin/sh" \) -a \
 		\( -x "$1/usr/sbin/chroot" -o -h "$1/usr/sbin/chroot" -o \
 		   -x "$1/sbin/chroot" -o -h "$1/sbin/chroot" \) -a \
@@ -181,6 +182,18 @@ checkmount(){
 		   -x "$1/bin/init" -o -h "$1/bin/init" \)
 }
 #
+# minimaldevnodes "mountpoint"
+#  tests an already mounted mountpoint to see if a very minimal
+#  set of devices exists or can be created in dev, and returns
+#  failure if not.  This is required for booting to an nfsroot
+#  with an empty dev directory, as commonly occurs when the rootfs
+#  is created from a tar.gz image.  This is also required for mdev.
+minimaldevnodes(){
+	[ -c "$1/dev/console" ] || mknod -m 600 "$1/dev/console" c 5 1 || return 1
+	[ -c "$1/dev/null"    ] || mknod -m 666 "$1/dev/null"    c 1 3 || return 1
+	return 0
+}
+#
 # swivel "new root" "old root"
 #  NOTE: the arguments must be paths relative to /, bad things
 #  will happen if the arguments themselves start with /
diff --git a/packages/slugos-init/files/turnup b/packages/slugos-init/files/turnup
index 4aa1fba3ed..2bbc9024ef 100644
--- a/packages/slugos-init/files/turnup
+++ b/packages/slugos-init/files/turnup
@@ -578,7 +578,7 @@ disk() {
 	fso="$(fsoptions "$@")"
 	if	if test -n "$uuid"
 		then
-			mount "$@" UUID="$uuid" "$new" || mount "$@" -U "$uuid" "$new"
+			mount "$@" UUID="$uuid" "$new"
 		else
 			mount "$@" "$device" "$new"
 		fi
@@ -591,7 +591,7 @@ disk() {
 	if test -n "$fst" &&
 		if test -n "$uuid"
 		then
-			mount -t "$fst" -o "$fso" UUID="$uuid" "$new" || mount -t "$fst" -o "$fso" -U "$uuid" "$new"
+			mount -t "$fst" -o "$fso" UUID="$uuid" "$new"
 		else
 			mount -t "$fst" -o "$fso" "$device" "$new"
 		fi
@@ -633,7 +633,7 @@ disk() {
 		then
 			echo "  options used: -t $fst -o $fso [error in this script]" >&2
 			test -n "$uuid" &&
-				echo "  uuid: $uuid (passed with UUID= or -U)" >&2
+				echo "  uuid: $uuid (passed with UUID=<uuid>)" >&2
 		fi
 	fi
 
diff --git a/packages/slugos-init/slugos-init_5.0.bb b/packages/slugos-init/slugos-init_5.0.bb
index 9c50cd61f6..92ac7e30f3 100644
--- a/packages/slugos-init/slugos-init_5.0.bb
+++ b/packages/slugos-init/slugos-init_5.0.bb
@@ -4,7 +4,7 @@ PRIORITY = "required"
 LICENSE = "GPL"
 DEPENDS = "base-files devio"
 RDEPENDS = "busybox devio"
-PR = "r0"
+PR = "r1"
 
 SRC_URI = "file://boot/flash \
 	   file://boot/disk \