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31 lines
1.0 KiB
Go
31 lines
1.0 KiB
Go
// Copyright (c) The OpenTofu Authors
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// SPDX-License-Identifier: MPL-2.0
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// Copyright (c) 2023 HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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//go:build !windows
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// +build !windows
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package replacefile
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import (
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"os"
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)
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// AtomicRename renames from the source path to the destination path,
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// atomically replacing any file that might already exist at the destination.
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//
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// Typically this operation can succeed only if the source and destination
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// are within the same physical filesystem, so this function is best reserved
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// for cases where the source and destination exist in the same directory and
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// only the local filename differs between them.
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//
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// The Unix implementation of AtomicRename relies on the atomicity of renaming
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// that is required by the ISO C standard, which in turn assumes that Go's
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// implementation of rename is calling into a system call that preserves that
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// guarantee.
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func AtomicRename(source, destination string) error {
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// On Unix systems, a rename is sufficiently atomic.
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return os.Rename(source, destination)
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}
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