tree 2ebe19dca1be096f998ba9af6d9ec64aa8386f7a
parent 3b43d6942e6bd6ead69c0165cc6f09d94c80f866
author Xuewei Zhang <xueweiz@google.com> 1535481941 -0700
committer ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> 1535661501 +0000

installer: Use slave mount in postinst script.

Currently the postinst script uses shared mount to bind mount /run to
/tmp/*/run, do postinst actions, and then umount it. This has caused
some side effect: the bind mount created by Docker under /run/docker/*
can be accidentally umount-ed when the chromeos-postinst umounts
/tmp/*/run.

One solution would be to make the /tmp/*/run a slave mount, hence
umount does not propagate back to /run folder.

BUG=b:112417598
TEST=manually test

Change-Id: Iaa21363094d8dc90ac0fdb887e554839e5b299a3
Reviewed-on: https://chromium-review.googlesource.com/1194604
Commit-Ready: Xuewei Zhang <xueweiz@google.com>
Tested-by: Xuewei Zhang <xueweiz@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
(cherry picked from commit 2a5a7c18d304ca8dc7c2e3ad008d420b9c461307)
Reviewed-on: https://chromium-review.googlesource.com/1196949
Commit-Queue: Xuewei Zhang <xueweiz@google.com>