main/mkinitfs: fix init to find UUID and usbdisk symlink in fstab

ref #734

2 files changed, 118 insertions, 1 deletions

diff --git a/main/mkinitfs/APKBUILD b/main/mkinitfs/APKBUILD
index 00974e2a72..dd2c59a0f8 100644
--- a/main/mkinitfs/APKBUILD
+++ b/main/mkinitfs/APKBUILD
@@ -1,13 +1,14 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=mkinitfs
 pkgver=2.3.4
-pkgrel=2
+pkgrel=3
 pkgdesc="Tool to generate initramfs images for Alpine"
 url=http://git.alpinelinux.org/cgit/mkinitfs
 depends="busybox apk-tools>=2.0"
 triggers="$pkgname.trigger=/usr/share/kernel/*"
 source="http://git.alpinelinux.org/cgit/$pkgname.git/snapshot/$pkgname-$pkgver.tar.bz2
         0001-init-fix-progressbar-when-not-quiet.patch
+        mount-move.patch
         eglibc.patch
         "
 arch="noarch"
@@ -45,4 +46,5 @@ package() {
 }
 md5sums="abec6dced89e137dc60542c1e5f938ac  mkinitfs-2.3.4.tar.bz2
 4ea4389d5dff0a69d6792420574d2f1f  0001-init-fix-progressbar-when-not-quiet.patch
+049392dd315240d2c7d892ef67072e03  mount-move.patch
 e59c2f7de496fe430b07e32fd812ebe0  eglibc.patch"
diff --git a/main/mkinitfs/mount-move.patch b/main/mkinitfs/mount-move.patch
new file mode 100644
index 0000000000..4931663246
--- /dev/null
+++ b/main/mkinitfs/mount-move.patch
@@ -0,0 +1,115 @@
+diff --git a/initramfs-init.in b/initramfs-init.in
+index 2ff2585..f64ef26 100755
+--- a/initramfs-init.in
++++ b/initramfs-init.in
+@@ -104,10 +104,32 @@ unpack_apkovl() {
+ }
+ 
+ # find mount dir for given device in an fstab
++# returns global MNTOPTS
+ find_mnt() {
+-       local dev="$1"
+-       local fsfile="$2"
+-       awk "\$1 == \"$dev\" {print \$2}\"" "$fsfile" 2>/dev/null
++       local search_dev="$1" fstab="$2"
++       MNTOPTS=
++       [ -r "$fstab" ] || return 1
++       local dev mnt fs chk
++       case "$search_dev" in
++               UUID=*|LABEL=*|/dev/*);;
++               *) search_dev=/dev/$search_dev;;
++       esac
++       local search_real_dev=$(resolve_dev $search_dev)
++       while read dev mnt fs MNTOPTS chk; do
++               local real_dev=$(resolve_dev $dev)
++               local i j
++               for i in "$search_dev" "$search_real_dev"; do
++                       [ -z "$i" ] && continue
++                       for j in "$dev" "$real_dev"; do
++                               [ -z "$j" ] && continue
++                               if [ "$i" = "$j" ]; then
++                                       echo "$mnt"
++                                       return
++                               fi
++                       done
++               done
++       done < $fstab
++       MNTOPTS=
+ }
+ 
+ # Wait for usb to settle
+@@ -214,6 +236,29 @@ start_lvm() {
+                lvm vgchange --ignorelockingfailure -a y >/dev/null 2>&1
+ }
+ 
++# resolve an uuid or symlink to the real device
++resolve_dev() {
++       case "$1" in
++       UUID=*|LABEL=*) findfs "$1";;
++       *) readlink -f "$1";;
++       esac
++}
++
++# remount ALPINE_MNT according given fstab
++remount_alpine_mnt() {
++       local fstab="$1"
++       local mnt=$(find_mnt $ALPINE_DEV $fstab)
++       if [ "$ALPINE_MNT" != "$mnt" ]; then
++               mkdir -p "$mnt"
++               mount -o move $ALPINE_MNT $mnt
++               ALPINE_MNT=$mnt
++       fi
++       # respect users mount options in fstab
++       if [ -n "$MNTOPTS" ]; then
++               mount -o remount,$MNTOPTS "$ALPINE_MNT"
++       fi
++}
++
+ # gotta start from somewhere :)
+ echo "Alpine Init $VERSION"
+ 
+@@ -270,7 +315,7 @@ if [ -n "$KOPT_ovl_dev" ] ; then
+ fi
+ 
+ case "$ALPINE_DEV" in
+-       UUID=*) ;;
++       UUID=*|LABEL=*) ;;
+        *) ALPINE_DEV=/dev/$ALPINE_DEV ;;
+ esac
+        
+@@ -453,20 +498,9 @@ pkgs="$pkgs alpine-base"
+ 
+ # move the ALPINE_MNT if ALPINE_DEV is specified in users fstab
+ # this is so a generated /etc/apk/repositories will use correct mount dir
+-new_mnt=$(find_mnt $ALPINE_DEV $sysroot/etc/fstab)
+-if [ -n "$new_mnt" ] && [ "$new_mnt" != "$ALPINE_MNT" ]; then
+-       mkdir -p $new_mnt
+-       mount -o move $ALPINE_MNT $new_mnt
+-       ALPINE_MNT="$new_mnt"
+-fi
+-
+-# let user set ALPINE_MNT as readonly in fstab
+-if [ -f $sysroot/etc/fstab ]; then
+-       mountopts=$(awk "\$2 == \"$ALPINE_MNT\" { print \$4 }" \
+-               $sysroot/etc/fstab)
+-       if [ -n "$mountopts" ]; then
+-               mount -o remount,$mountopts $ALPINE_MNT
+-       fi
++if [ -f "$sysroot"/etc/fstab ]; then
++       has_fstab=1
++       remount_alpine_mnt "$sysroot"/etc/fstab
+ fi
+ 
+ # copy keys so apk finds them. apk looks for stuff relative --root
+@@ -503,6 +537,11 @@ else
+ fi
+ eend $?
+ 
++# remount ALPINE_MNT according default fstab from package
++if [ -z "$has_fstab" ] && [ -f "$sysroot"/etc/fstab ]; then
++       remount_alpine_mnt "$sysroot"/etc/fstab
++fi
++
+ # fix inittab if alternative console
+ setup_inittab_console $CONSOLE
+