First commit, supports multiple devices via cryptdevice=, cryptdevice1= etc

encrypt_hook

@@ -4,6 +4,36 @@ run_hook() {
     modprobe -a -q dm-crypt >/dev/null 2>&1
     [ "${quiet}" = "y" ] && CSQUIET=">/dev/null"
 
+    count=0
+    while true
+    do
+        num=$count
+        [ $count -eq 0 ] && num=""
+
+        cryptdevice_name="cryptdevice$num"
+        #cryptdevice=${!cryptdevice_name} # this would work with bash
+        cryptdevice="$(eval echo "$""$cryptdevice_name")"
+
+        cryptkey_name="cryptkey$num"
+        cryptkey="$(eval echo "$""$cryptkey_name")"
+
+        crypto_name="crypto$num"
+        crypto="$(eval echo "$""$crypto_name")"
+
+        if [ -n "${cryptdevice}" ]; then
+            DEPRECATED_CRYPT=0
+            IFS=: read cryptdev cryptname cryptoptions <<EOF
+$cryptdevice
+EOF
+        else
+            if [ $count -ne 0 ]; then
+                break;
+            fi
+            DEPRECATED_CRYPT=1
+            cryptdev="${root}"
+            cryptname="root"
+        fi
+
         # Get keyfile if specified
         ckeyfile="/crypto_keyfile.bin"
         if [ -n "$cryptkey" ]; then
@@ -33,17 +63,6 @@ EOF
             [ ! -f ${ckeyfile} ] && echo "Keyfile could not be opened. Reverting to passphrase."
         fi
 
-    if [ -n "${cryptdevice}" ]; then
-        DEPRECATED_CRYPT=0
-        IFS=: read cryptdev cryptname cryptoptions <<EOF
-$cryptdevice
-EOF
-    else
-        DEPRECATED_CRYPT=1
-        cryptdev="${root}"
-        cryptname="root"
-    fi
-
         warn_deprecated() {
             echo "The syntax 'root=${root}' where '${root}' is an encrypted volume is deprecated"
             echo "Use 'cryptdevice=${root}:root root=/dev/mapper/root' instead."
@@ -134,6 +153,8 @@ EOF
             fi
         fi
         rm -f ${ckeyfile}
+        count=$((count + 1))
+    done
 }
 
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