tree 619545ee8e093cad2d79464ff9b43a407d5fcdd4
parent ad60768bdfc4680edc07422693381ac152d74e37
author Elliott Hughes <enh@google.com> 1634174721 -0700
committer Elliott Hughes <enh@google.com> 1634587127 -0700

Add preadv2/pwritev2 wrappers.

They're in glibc, though not in musl.

Also add basic doc comments to the whole of <sys/uio.h>.

Bug: http://b/203002492
Test: treehugger
Change-Id: Ic607f7f349e5b7c9bf66c25b7bd68f827da530d6