From f4879ffdbc135f6a31d6db955e672cee5fbb57a0 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Tue, 31 Jan 2006 19:58:44 +0000
Subject: - check for active dmraid devices by table (rather than name) before 
  activation

---
 rc.d/init.d/functions | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'rc.d/init.d')

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
+}
-- 
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