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10532fdb14
Separate the result and the errno value, rather than assuming that the result can never be negative. Change-Id: Ib01a70a3d46285aa77e95371cdde74e1504e7c12 Reviewed-on: https://go-review.googlesource.com/c/go/+/496416 Run-TryBot: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Bryan Mills <bcmills@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com>
26 lines
571 B
Go
26 lines
571 B
Go
// Copyright 2023 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build unix
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package unix
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import (
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"syscall"
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_ "unsafe" // for go:linkname
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)
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// Implemented in the runtime package.
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//
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//go:linkname fcntl runtime.fcntl
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func fcntl(fd int32, cmd int32, arg int32) (int32, int32)
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func Fcntl(fd int, cmd int, arg int) (int, error) {
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val, errno := fcntl(int32(fd), int32(cmd), int32(arg))
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if val == -1 {
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return int(val), syscall.Errno(errno)
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}
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return int(val), nil
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}
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