1 files changed, 29 insertions, 0 deletions
diff --git a/rc.d/init.d/functions b/rc.d/init.d/functions
index 7ba1090a..59dca79a 100755
--- a/rc.d/init.d/functions
+++ b/rc.d/init.d/functions
@@ -475,3 +475,32 @@ confirm() {
       fi
   done
 }
+
+# resolve a device node to its major:minor numbers in decimal or hex
+get_numeric_dev() {
+(
+    fmt="%d:%d"
+    if [ "$1" == "hex" ]; then
+        fmt="%x:%x"
+    fi
+    eval printf "$fmt" $(stat -c "0x%t 0x%T" $2)
+) 2>/dev/null
+}
+
+# find the working name for a running dm device with the same table as one
+# that dmraid would create
+resolve_dm_name() {
+(
+    name="$1"
+
+    line=$(/sbin/dmraid -ay -t --ignorelocking | grep "^$name:" | cut -d\  -f2-)
+    newline=$line
+    for x in $line ; do
+        if [[ "$x" =~ "^/dev/" ]] ; then
+            majmin=$(get_numeric_dev dec $x)
+            newline=$(echo $newline | sed -e "s,$x\( \|$\),$majmin\1,g")
+        fi
+    done
+    /sbin/dmsetup table | sed -n "s/\(^[^:]\+\): $newline\( \+$\|$\)/\1/p"
+) 2>/dev/null
+}