tree 26a3051c85d5401290a097eb6b9266af8b8d0864
parent aa5ede6d71d5305b1f67c3d319ef77f379071c58
author Xiaochu Liu <xiaochu@chromium.org> 1510610352 -0800
committer chrome-bot <chrome-bot@chromium.org> 1510978727 -0800

Support umount in helper_process

Currently mount points cleanup is called directly in imageloader_main
without sandboxing. In order for cleanup to work in non-root user in
sandboxed environment (dbus call), I provide a method in helper_process
to perform umount in sandbox as root.

It also fixes a bug in message deserialization where message could be
cut shorter accidentally due to encoding with string delimeter in the
middle.

BUG=chromium:784031,chromium:782334
TEST=unittest, mount/umount images on DuT

Change-Id: Ib4c7522c96165c6ffae4cb0342137f8a0bdcc07b
Reviewed-on: https://chromium-review.googlesource.com/767024
Commit-Ready: Xiaochu Liu <xiaochu@chromium.org>
Tested-by: Xiaochu Liu <xiaochu@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>