From 9f589b023fd4e38b6c14b5b174a8e5814c822fb0 Mon Sep 17 00:00:00 2001
From: Christiaan Dirkx <christiaan@dirkx.email>
Date: Sat, 13 Feb 2021 00:00:54 +0100
Subject: [PATCH] Update `decode_error_kind` to decode os errors to
 `NotSupported`

---
 library/std/src/sys/unix/mod.rs    | 1 +
 library/std/src/sys/vxworks/mod.rs | 1 +
 library/std/src/sys/wasi/mod.rs    | 1 +
 library/std/src/sys/windows/mod.rs | 1 +
 4 files changed, 4 insertions(+)

diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index 44328ffc22e..7b99e0fe1f9 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -148,6 +148,7 @@ pub fn decode_error_kind(errno: i32) -> ErrorKind {
         libc::EINVAL => ErrorKind::InvalidInput,
         libc::ETIMEDOUT => ErrorKind::TimedOut,
         libc::EEXIST => ErrorKind::AlreadyExists,
+        libc::ENOSYS => ErrorKind::NotSupported,
 
         // These two constants can have the same value on some systems,
         // but different values on others, so we can't use a match
diff --git a/library/std/src/sys/vxworks/mod.rs b/library/std/src/sys/vxworks/mod.rs
index c20edaa1a47..95e4baf3a6d 100644
--- a/library/std/src/sys/vxworks/mod.rs
+++ b/library/std/src/sys/vxworks/mod.rs
@@ -83,6 +83,7 @@ pub fn decode_error_kind(errno: i32) -> ErrorKind {
         libc::EINVAL => ErrorKind::InvalidInput,
         libc::ETIMEDOUT => ErrorKind::TimedOut,
         libc::EEXIST => ErrorKind::AlreadyExists,
+        libc::ENOSYS => ErrorKind::NotSupported,
 
         // These two constants can have the same value on some systems,
         // but different values on others, so we can't use a match
diff --git a/library/std/src/sys/wasi/mod.rs b/library/std/src/sys/wasi/mod.rs
index a0a37ef8316..c772fc0be69 100644
--- a/library/std/src/sys/wasi/mod.rs
+++ b/library/std/src/sys/wasi/mod.rs
@@ -78,6 +78,7 @@ pub fn decode_error_kind(errno: i32) -> std_io::ErrorKind {
         wasi::ERRNO_TIMEDOUT => TimedOut,
         wasi::ERRNO_EXIST => AlreadyExists,
         wasi::ERRNO_AGAIN => WouldBlock,
+        wasi::ERRNO_NOSYS => NotSupported,
         _ => Other,
     }
 }
diff --git a/library/std/src/sys/windows/mod.rs b/library/std/src/sys/windows/mod.rs
index 0353c9811f1..c8fada3c0c2 100644
--- a/library/std/src/sys/windows/mod.rs
+++ b/library/std/src/sys/windows/mod.rs
@@ -78,6 +78,7 @@ pub fn decode_error_kind(errno: i32) -> ErrorKind {
         | c::ERROR_IPSEC_IKE_TIMED_OUT
         | c::ERROR_RUNLEVEL_SWITCH_TIMEOUT
         | c::ERROR_RUNLEVEL_SWITCH_AGENT_TIMEOUT => return ErrorKind::TimedOut,
+        c::ERROR_CALL_NOT_IMPLEMENTED => return ErrorKind::NotSupported,
         _ => {}
     }