fs_mgr: overlayfs: ReadFstabFromFile touches errno
Regression from commit 77c28476f19c910a869af878c8983d52e53c07b
("Remove the mount points defined in skip_mount.cfg from
ReadDefaultFstab()") resulted in ReadFstabFromFile to report
errno ENOENT even upon success, preventing clear error propagation
for real failures (ReadFstabFromFile would _always_ report ENOENT).
The bad error propagation resulted in an adb remount failure.
Added immunization against future adjustments that may also
result in a similar regression in adb remount behaviors.
Test: adb-remount-test.sh
Bug: 132594161
Bug: 128961335
Change-Id: Icf5d48bbfc6d938d4b9657ca8004a6a6ddaab5a6
2 files changed