From: Antonio Ospite <ospite@studenti.unina.it>
Date: Fri, 30 Sep 2011 20:49:38 +0000 (+0200)
Subject: Fix several problems in linux_find_root_device
X-Git-Tag: v0.2~1
X-Git-Url: https://git.ao2.it/kboot-utils.git/commitdiff_plain/3ef03f39291fbea80bccb342012446284d9ad5ce?hp=de2287f330a9c5ed89e706206b1d02b7f2cdcb4d

Fix several problems in linux_find_root_device

'stat' returns the major and minor numbers in hexadecimal, while
'mountpoint' returns them in decimal; convert the ones from 'stat' so
comparison actually work.

Rename variables to reflect better the difference between the DEVICE
representation (major:minor) and the NODE representation (a path of a
file under /dev).

Finally fix the invocation of linux_find_root_device as well.
---

diff --git a/kboot-mkconfig_lib b/kboot-mkconfig_lib
index 155cca0..080edf7 100644
--- a/kboot-mkconfig_lib
+++ b/kboot-mkconfig_lib
@@ -90,18 +90,20 @@ version_find_latest ()
 }
 
 linux_find_root_device() {
-  RDEV=$(mountpoint -d /)
+  ROOT_DEVICE=$(mountpoint -d /)
 
   for devnode in $(find /dev);
   do
-    if [ $(stat --printf="%t:%T" "$devnode") = $RDEV ];
+    # Get major and minor in decimal
+    CURRENT_DEVICE=$(printf "%d:%d" $(stat --printf="0x%t 0x%T" "$devnode"))
+    if [ $CURRENT_DEVICE = $ROOT_DEVICE ];
     then
-      ROOTDEVICE="$devnode"
+      ROOT_NODE="$devnode"
       break
     fi
   done
 
-  echo "$ROOTDEVICE"
+  echo "$ROOT_NODE"
 }
 
 linux_entry ()
@@ -144,7 +146,7 @@ list_kernels ()
     alt_version=`echo $version | sed -e "s,\.old$,,g"`
     # TODO: remove this too 
     #linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
-    linux_root_device_thisversion=linux_find_root_device
+    linux_root_device_thisversion=`linux_find_root_device`
 
     initrd=
     for i in "initrd.img-${version}" "initrd-${version}.img" \