62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package update
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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)
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func copyFile(src, dst string) error {
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in, err := os.Open(src)
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if err != nil {
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return fmt.Errorf("cannot open %s: %w", src, err)
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}
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defer func() { _ = in.Close() }()
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if err := os.MkdirAll(filepath.Dir(dst), 0o755); err != nil {
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return fmt.Errorf("cannot ensure %s: %w", filepath.Dir(dst), err)
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}
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out, err := os.OpenFile(dst, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o755)
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if err != nil {
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return fmt.Errorf("cannot create %s: %w", dst, err)
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}
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if _, err := io.Copy(out, in); err != nil {
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_ = out.Close()
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_ = os.Remove(dst)
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return fmt.Errorf("cannot copy to %s: %w", dst, err)
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}
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if err := out.Sync(); err != nil {
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_ = out.Close()
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_ = os.Remove(dst)
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return fmt.Errorf("cannot fsync %s: %w", dst, err)
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}
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if err := out.Close(); err != nil {
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_ = os.Remove(dst)
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return fmt.Errorf("cannot close %s: %w", dst, err)
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}
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return nil
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}
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