init-install.sh: improve hard drive searching process

Previously, only unremovable hard drives are searched and are treated
as candidates of target disks to intall into.

However, it's possible that we're going to install the live image into
a removable media such as an USB. This patch enables this possibility.

In addition, this patch presents more information about the hard drives
so that user may have more knowledge about which hard drive they are
going to install their image into.

[YOCTO #5018]

(From OE-Core rev: 358f0584d779825307eec08c023b5ff14e72cf9e)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/initrdscripts/files/init-install.sh

@@ -13,46 +13,66 @@ boot_size=20
 # 5% for the swap
 swap_ratio=5
 
-found="no"
+# Get a list of hard drives
+hdnamelist=""
+live_dev_name=${1%%/*}
 
-echo "Searching for a hard drive..."
-for device in 'hda' 'hdb' 'sda' 'sdb' 'mmcblk0' 'mmcblk1'
-  do
-  if [ -e /sys/block/${device}/removable ]; then
-      if [ "$(cat /sys/block/${device}/removable)" = "0" ]; then
-	  found="yes"
-
-	  while true; do
-	      # Try sleeping here to avoid getting kernel messages
-              # obscuring/confusing user
-	      sleep 5
-	      echo "Found drive at /dev/${device}. Do you want to install this image there ? [y/n]"
-	      read answer
-	      if [ "$answer" = "y" ] ; then
-		  break
-	      fi
-	  
-	      if [ "$answer" = "n" ] ; then
-		  found=no
-		  break
-	      fi
-
-	      echo "Please answer by y or n"
-	  done
-      fi
-  fi
-
-  if [ "$found" = "yes" ]; then
-      break;
-  fi
+echo "Searching for hard drives ..."
 
+for device in `ls /sys/block/`; do
+    case $device in
+	loop*)
+            # skip loop device
+	    ;;
+	ram*)
+            # skip ram device
+	    ;;
+	*)
+	    # skip the device LiveOS is on
+	    # Add valid hard drive name to the list
+	    if [ $device != $live_dev_name -a -e /dev/$device ]; then
+		hdnamelist="$hdnamelist $device"
+	    fi
+	    ;;
+    esac
 done
 
-if [ "$found" = "no" ]; then
-      exit 1      
+TARGET_DEVICE_NAME=""
+for hdname in $hdnamelist; do
+    # Display found hard drives and their basic info
+    echo "-------------------------------"
+    echo /dev/$hdname
+    if [ -r /sys/block/$hdname/device/vendor ]; then
+	echo -n "VENDOR="
+	cat /sys/block/$hdname/device/vendor
+    fi
+    echo -n "MODEL="
+    cat /sys/block/$hdname/device/model
+    cat /sys/block/$hdname/device/uevent
+    echo
+    # Get user choice
+    while true; do
+	echo -n "Do you want to install this image there? [y/n] "
+	read answer
+	if [ "$answer" = "y" -o "$answer" = "n" ]; then
+	    break
+	fi
+	echo "Please answer y or n"
+    done
+    if [ "$answer" = "y" ]; then
+	TARGET_DEVICE_NAME=$hdname
+	break
+    fi
+done
+
+if [ -n "$TARGET_DEVICE_NAME" ]; then
+    echo "Installing image on /dev/$TARGET_DEVICE_NAME ..."
+else
+    echo "No hard drive selected. Installation aborted."
+    exit 1
 fi
 
-echo "Installing image on /dev/${device}"
+device=$TARGET_DEVICE_NAME
 
 #
 # The udev automounter can cause pain here, kill it
@@ -65,14 +85,6 @@ rm -f /etc/udev/scripts/mount*
 #
 umount /dev/${device}* 2> /dev/null || /bin/true
 
-if [ ! -b /dev/sda ] ; then
-    mknod /dev/sda b 8 0
-fi
-
-if [ ! -b /dev/sdb ] ; then
-    mknod /dev/sdb b 8 16
-fi
-
 if [ ! -b /dev/loop0 ] ; then
     mknod /dev/loop0 b 7 0
 fi