tree 66ebd378fb496400d35ad38a8c4eb25931ad30f2
parent ac67b4eb7c70ea668abb32298b0cb16920a32a66
author Elliott Hughes <enh@google.com> 1453773984 -0800
committer Elliott Hughes <enh@google.com> 1453835384 -0800

Implement POSIX lockf.

This has been requested a few times over the years. This is basically
a very late rebase of https://android-review.googlesource.com/45470
which was abandoned years ago. One addition is that this version has
_FILE_OFFSET_BITS=64 support.

POSIX puts this in <unistd.h>. glibc also has it in <fcntl.h>.

Bug: http://b/13077650
Change-Id: I5862b1dc326e326c01ad92438ecc1578d19ba739