Merge pull request ostroproject#20 from rojkov/iotos-1724

installer: fix booting from MicroSD

Author: pohly

meta-ostro-xt/recipes-xt/initrdscripts/initramfs-framework-installer/installer

@@ -8,6 +8,8 @@ SETTINGS_COPY_SSH_KEYS="no"
 
 # DST_DISK is evaluated in find_emmc_disk() and contains the device to install OS onto
 DST_DISK=
+# rootfs partition of the installation media
+SRC_PARTITION="/dev/disk/by-partuuid/`echo $bootparam_root | cut -d'=' -f2`"
 
 installer_enabled() {
     if [ -n "$bootparam_installer" ]; then
@@ -104,13 +106,7 @@ install_onto_emmc() {
     set -x
     local pnum=0
     local gdisk_pnum=1
-    local rootuuid=`echo $bootparam_root | cut -d'=' -f2`
-
-    while [ ! -b /dev/disk/by-partuuid/$rootuuid ]; do
-        echo "Waiting for USB storage is fully initialized..."
-        sleep 1
-    done
-    mount -t $bootparam_rootfstype -o ro /dev/disk/by-partuuid/$rootuuid /rootfs
+    mount -t $bootparam_rootfstype -o ro $SRC_PARTITION /rootfs
 
     if [ -s /rootfs/etc/machine-id ]; then
         set +x
@@ -167,16 +163,29 @@ install_onto_emmc() {
 }
 
 read_settings() {
-    while [ ! -b /dev/sda ]; do
-        echo "Waiting for USB storage is initialized..."
+    local fat_part=
+    local disk=
+
+    while [ ! -b $SRC_PARTITION ]; do
+        echo "Waiting for installation media is fully initialized..."
         sleep 1
     done
 
-    local boot_mnt=`mktemp -d -p / tmp_efiboot_part.XXXXXX`
-    local usbstick_fat_part=`sgdisk -p /dev/sda | grep EF00 | awk '{print $1}'`
+    # USB and SD disks use different naming schemes for their partitions,
+    # therefore we have to check both schemes.
+    local canonical_part=`readlink -f $SRC_PARTITION`
+    if [ `echo $canonical_part | grep mmcblk | wc -l` -eq "0" ]; then
+        disk=`echo $canonical_part | cut -b -8`
+        fat_part="${disk}`sgdisk -p ${disk} | grep EF00 | awk '{print $1}'`"
+    else
+        disk=`echo $canonical_part | cut -b -12`
+        fat_part="${disk}p`sgdisk -p ${disk} | grep EF00 | awk '{print $1}'`"
+    fi
+
+    if [ -n $fat_part ]; then
+        local boot_mnt=`mktemp -d -p / tmp_efiboot_part.XXXXXX`
 
-    if [ -n $usbstick_fat_part ]; then
-        mount /dev/sda${usbstick_fat_part} $boot_mnt
+        mount $fat_part $boot_mnt
 
         if [ -f $boot_mnt/non-interactive-install.txt -o -f $boot_mnt/non-interactive-install ]; then
             SETTINGS_INTERACTIVE="no"