From 8c9944c50d9e5bce19e1a787b035356461935c4d Mon Sep 17 00:00:00 2001
From: Adam Perry <adamperry@google.com>
Date: Wed, 26 Jan 2022 22:32:21 +0000
Subject: [PATCH] Fix remove_dir_all on Fuchsia after CVE fix.

With the previous `is_dir` impl, we would attempt to unlink
a directory in the None branch, but Fuchsia supports returning
ENOTEMPTY from unlinkat() without the AT_REMOVEDIR flag because
we don't currently differentiate unlinking files and directories
by default.

On the Fuchsia side I've opened https://fxbug.dev/92273 to discuss
whether this is the correct behavior, but it doesn't seem like
addressing the error code is necessary to make our tests happy.

Updates std's libc crate to include DT_UNKNOWN for Fuchsia.
---
 Cargo.lock                     | 4 ++--
 library/std/Cargo.toml         | 2 +-
 library/std/src/sys/unix/fs.rs | 2 --
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index aa942065845..d37ddcb63b3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1986,9 +1986,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.108"
+version = "0.2.116"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8521a1b57e76b1ec69af7599e75e38e7b7fad6610f037db8c79b127201b5d119"
+checksum = "565dbd88872dbe4cc8a46e527f26483c1d1f7afa6b884a3bd6cd893d4f98da74"
 dependencies = [
  "rustc-std-workspace-core",
 ]
diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml
index 165169aedb3..3aab5d11422 100644
--- a/library/std/Cargo.toml
+++ b/library/std/Cargo.toml
@@ -15,7 +15,7 @@ cfg-if = { version = "0.1.8", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core" }
-libc = { version = "0.2.108", default-features = false, features = ['rustc-dep-of-std'] }
+libc = { version = "0.2.116", default-features = false, features = ['rustc-dep-of-std'] }
 compiler_builtins = { version = "0.1.66" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
diff --git a/library/std/src/sys/unix/fs.rs b/library/std/src/sys/unix/fs.rs
index ad656582a09..1e567b36145 100644
--- a/library/std/src/sys/unix/fs.rs
+++ b/library/std/src/sys/unix/fs.rs
@@ -1631,7 +1631,6 @@ mod remove_dir_impl {
         target_os = "illumos",
         target_os = "haiku",
         target_os = "vxworks",
-        target_os = "fuchsia"
     ))]
     fn is_dir(_ent: &DirEntry) -> Option<bool> {
         None
@@ -1642,7 +1641,6 @@ mod remove_dir_impl {
         target_os = "illumos",
         target_os = "haiku",
         target_os = "vxworks",
-        target_os = "fuchsia"
     )))]
     fn is_dir(ent: &DirEntry) -> Option<bool> {
         match ent.entry.d_type {