tree 9185c7809a82eb37df62f0b8d5fa3243c5e1f813
parent ab74e3260a4521cf8040de6aeb9356b86e9aacdf
author Elliott Hughes <enh@google.com> 1645051147 -0800
committer Elliott Hughes <enh@google.com> 1645051147 -0800

posix_spawn: always clear O_CLOEXEC for dup'ed fds.

dup2(2) is a no-op if the new and old fds are equal, but it's pretty
clear that any useful caller in the posix_spawn(3) context wants us to
clear O_CLOEXEC even if we don't actually "move" the fd.

Bug: https://www.austingroupbugs.net/view.php?id=411
Test: treehugger
Change-Id: I5ce1a1f9216df5afd295cc9e35b84527873e9541