syscall: let EPLAN9 and EWINDOWS implement errors.ErrUnsupported

As suggested by Bryan. This should fix the failing TestIPConnSpecificMethods on plan9 after CL 476217 was submitted. For #41198 Change-Id: I18e87b3aa7c9f7d48a1bd9c2819340acd1d2ca4e Reviewed-on: https://go-review.googlesource.com/c/go/+/476578 Reviewed-by: Cherry Mui <[email protected]> Run-TryBot: Tobias Klauser <[email protected]> Reviewed-by: Bryan Mills <[email protected]> Auto-Submit: Tobias Klauser <[email protected]> TryBot-Result: Gopher Robot <[email protected]>
golang · Mar 15, 2023 · 3128edf · 3128edf
1 parent 455168d
commit 3128edf
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diff --git a/src/syscall/syscall_plan9.go b/src/syscall/syscall_plan9.go
@@ -12,6 +12,7 @@
 package syscall
 
 import (
+	"errors"
 	"internal/oserror"
 	"runtime"
 	"unsafe"
@@ -43,6 +44,8 @@ func (e ErrorString) Is(target error) bool {
 	case oserror.ErrNotExist:
 		return checkErrMessageContent(e, "does not exist", "not found",
 			"has been removed", "no parent")
+	case errors.ErrUnsupported:
+		return checkErrMessageContent(e, "not supported")
 	}
 	return false
 }

diff --git a/src/syscall/syscall_windows.go b/src/syscall/syscall_windows.go
@@ -156,6 +156,8 @@ func (e Errno) Is(target error) bool {
 		return e == ERROR_FILE_NOT_FOUND ||
 			e == _ERROR_BAD_NETPATH ||
 			e == ERROR_PATH_NOT_FOUND
+	case errorspkg.ErrUnsupported:
+		return e == EWINDOWS
 	}
 	return false
 }