tree 808e8d5767b36c7eda9a87b09a215333b5d78d7a
parent 499601b94fa36759648542039d3df25e901ebb77
author Josh Gao <jmgao@google.com> 1555630770 -0700
committer Josh Gao <jmgao@google.com> 1556135982 -0700

Add a way to turn off unique_fd's operator int.

unique_fd's implicit conversion to int has led to tons of problems (see
all of the overloads for close, fdopen, fdopendir, etc.). Add a switch
that can turn it off, and reduce the ridiculous amount of work to fix up
callers by introducing a borrowed_fd type that can be constructed from
either int or unique_fd.

Test: treehugger
Change-Id: If77cf5cbcaddacdaec5919a15b3520fb68f51a62