Adding upstream version 1.22.1.upstream/1.22.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/internal/syscall/unix/fcntl_unix.go b/src/internal/syscall/unix/fcntl_unix.go
new file mode 100644
index 0000000..6f9e124
--- /dev/null
+++ b/src/internal/syscall/unix/fcntl_unix.go
@@ -0,0 +1,25 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build unix
+
+package unix
+
+import (
+	"syscall"
+	_ "unsafe" // for go:linkname
+)
+
+// Implemented in the runtime package.
+//
+//go:linkname fcntl runtime.fcntl
+func fcntl(fd int32, cmd int32, arg int32) (int32, int32)
+
+func Fcntl(fd int, cmd int, arg int) (int, error) {
+	val, errno := fcntl(int32(fd), int32(cmd), int32(arg))
+	if val == -1 {
+		return int(val), syscall.Errno(errno)
+	}
+	return int(val), nil
+}