the symlink use flag update

kernel-2-symlink-use-20050727.txt (text/plain), 2.39 KB, created by Kevin Williams on 2005-07-27 16:11:01 UTC

--- /usr/portage/eclass/kernel-2.eclass	2005-07-21 10:05:35.000000000 -0400
+++ /usr/local/src/kernel-2.eclass	2005-07-27 16:06:44.000000000 -0400
@@ -533,24 +533,45 @@ preinst_headers() {
 #==============================================================
 postinst_sources() {
 	local MAKELINK=0
+        local MAKE_OLDLINK=0
 
-	# if we have USE=symlink, then force K_SYMLINK=1
-	use symlink && K_SYMLINK=1
+        # current and working Kernel tree.
+         local K_DIR
 
-	# if we are to forcably symlink, delete it if it already exists first.
-	if [[ -n ${K_SYMLINK} ]]; then
-		[[ -h ${ROOT}usr/src/linux ]] && rm ${ROOT}usr/src/linux
-		MAKELINK=1
-	fi
+        # if we have USE=symlink, then force K_SYMLINK=1
+        use symlink && K_SYMLINK=1
 
-	# if the link doesnt exist, lets create it
-	[[ ! -h ${ROOT}usr/src/linux ]] && MAKELINK=1
+        # if we are to forcably create the symlink for the new kernel tree,
+        # then first we need to delete the symlinks for the current andd backup
+        # kernel trees if they exsist.
+        if [[ -n ${K_SYMLINK} ]]; then
+
+                if [[ -h ${ROOT}usr/src/linux ]]; then
+                  # remove the backup kernel symlink, only when upgrading kernel
+                  # emerging the same kernel version only removes the symlink
+                  # for current kernel tree.
+                  K_DIR=$(readlink ${ROOT}usr/src/linux)
+                  [[ "${K_DIR}" != "linux-${KV_FULL}" ]] && MAKE_OLDLINK=1
+                  [[ -h ${ROOT}usr/src/linux-old ]] && [[ ${MAKE_OLDLINK} == 1 ]] &&
+                  rm ${ROOT}usr/src/linux-old
+
+                  # remove the link for current kernel tree
+                  rm ${ROOT}usr/src/linux
+                fi
+                MAKELINK=1
+        fi
+
+        # enabling making a new current link if it doesn't already exsist.
+        [[ ! -h ${ROOT}usr/src/linux ]] && MAKELINK=1
+
+        # create the symlinks for the current and backup kernel trees.
+        if [[ ${MAKELINK} == 1 ]]; then
+                cd ${ROOT}usr/src
+                ln -sf linux-${KV_FULL} linux
+                [[ ${MAKE_OLDLINK} == 1 ]] && ln -sf ${K_DIR} linux.old
+                cd ${OLDPWD}
+        fi
 
-	if [[ ${MAKELINK} == 1 ]]; then
-		cd ${ROOT}usr/src
-		ln -sf linux-${KV_FULL} linux
-		cd ${OLDPWD}
-	fi
 
 	# Don't forget to make directory for sysfs
 	[[ ! -d ${ROOT}sys ]] && kernel_is 2 6 && mkdir ${ROOT}sys