tree 1bcbd963dacbd409d368aa1c7f870dd9404aba6d
parent fa8a442ba233df8ff5c683bf0ee770f7b57549d8
author z3DD3r <z3dd3r@gmail.com> 1583334460 +0300
committer z3DD3r <z3dd3r@gmail.com> 1583343178 +0300

backuptool: Fix backup/restore functionality

Backup/restore functionality was broken in the
Ia1f4ae95c9e4dae4df844853e81c264bc838f177 change
because of incorrect check of the function's result.

check_prereq() function refactored to return 0 if
backuping/restoration is possible. Any work should be
performed only if check_prereq() succeeds.

Change-Id: Ic977dba675df58a228ef4b882b25beb66cc9d2c6