commit 5704c423c81790195161c1757ae79da188590c51
author Elliott Hughes <enh@google.com> Mon Jan 25 18:06:24 2016 -0800
committer Elliott Hughes <enh@google.com> Tue Jan 26 11:09:44 2016 -0800
tree 66ebd378fb496400d35ad38a8c4eb25931ad30f2
parent ac67b4eb7c70ea668abb32298b0cb16920a32a66

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

libc/libc.map.txt

diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index 928f10d..e5cae49 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1262,6 +1262,8 @@
     getifaddrs;
     if_freenameindex;
     if_nameindex;
+    lockf;
+    lockf64;
     preadv;
     preadv64;
     prlimit; # arm mips x86