commit 8e556f4e2344b71b0be0b73b29c8185b677dd57f
author Mike Frysinger <vapier@chromium.org> Tue May 09 03:38:20 2017 -0400
committer chrome-bot <chrome-bot@chromium.org> Thu Jul 13 19:46:10 2017 -0700
tree 8b0f63466dcbe7406b966d7666ff3c18fd2d171c
parent bce7904376beee2912932433a4634c1c25afe2f5

image_signing: sign_official_build.sh: use loopbacks for dump_config

This avoids copying out the kernels just to read their configs.
Not super important as the signer doesn't use it, but we want to
kill off the grab_kernel_config helper.

BRANCH=None
BUG=chromium:714598
TEST=dump_config still works

Change-Id: I2533b1d4de6980120f277fea3a1d964cb4fbaf0d
Reviewed-on: https://chromium-review.googlesource.com/505479
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>

scripts/image_signing/sign_official_build.sh

diff --git a/scripts/image_signing/sign_official_build.sh b/scripts/image_signing/sign_official_build.sh
index 9ef3f5f..d643f18 100755
--- a/scripts/image_signing/sign_official_build.sh
+++ b/scripts/image_signing/sign_official_build.sh
@@ -859,9 +859,10 @@
 case ${TYPE} in
 dump_config)
   check_argc $# 2
+  loopdev=$(loopback_partscan "${INPUT_IMAGE}")
   for partnum in 2 4; do
     info "kernel config in partition number ${partnum}:"
-    grab_kernel_config "${INPUT_IMAGE}" ${partnum}
+    sudo dump_kernel_config "${loopdev}p${partnum}"
     echo
   done
   exit 0