commit 6502f59a98e6f46cfa40e6f5b76b8098b9083da7
author Zim <zezeozue@google.com> Mon Apr 12 13:06:20 2021 +0100
committer Zimuzo Ezeozue <zezeozue@google.com> Mon Apr 12 12:52:47 2021 +0000
tree 872a33eba25e1bbb2dbd134780563936145e6ff0
parent fdeb85d4ae12a88951dcc280635c58561604aeba

Fix FileUtils#copy to fallback on userspace copy if sendfile fails

As per the manpage, sendfile(2) might fail for the following reasons:
1. input fd doesn't support mmap
2. output was opened with O_APPEND

If sendfile(2) fails with EINVAL or ENOSYS, we fallback to userspace
copy

Fixed failing FileUtilsTest#convertToModernFd test since
I7d6ecf4549e8ed5134d20977c2089240be804827 that stoped matching valid
files to convert to modernfd with regex

Test: atest FileUtilsTest
Bug: 184236915
Change-Id: I0955fe2a7dfb40ac1f78bde4a325eb624a34f28b