tree 800b4b5e4ea837e83f3f15b32be6f139d44a21e2
parent 779f7d0840a8bac4a0e10f2df4b08cd42df35592
author David Benjamin <davidben@google.com> 1661789674 -0400
committer Boringssl LUCI CQ <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com> 1661790697 +0000

Use O_CLOEXEC instead of fcntl(FD_CLOEXEC)

O_CLOEXEC avoids a race condition and is less code. It was supported in
Linux starting 2.6.23. https://bugs.python.org/issue26343#msg260151 says
it's been available since macOS 10.7. Let's try using it instead of
fcntl and see if anything breaks. It's even part of POSIX these days.

Update-Note: BoringSSL's /dev/urandom code now assumes the platform
supports O_CLOEXEC.

Change-Id: I95313892b36539591685d4c83a387f77129ad3d1
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/54125
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>