65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
package util
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import (
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"io"
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"os"
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"github.com/warewulf/warewulf/internal/pkg/wwlog"
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)
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func CopyFile(src string, dst string) (err error) {
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wwlog.Debug("Copying '%s' to '%s'", src, dst)
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// Open source file
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srcFD, err := os.Open(src)
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if err != nil {
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wwlog.Debug("Could not open source file %s: %s", src, err)
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return err
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}
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defer func() { _ = srcFD.Close() }()
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srcInfo, err := srcFD.Stat()
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if err != nil {
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wwlog.Debug("Could not stat source file %s: %s", src, err)
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return err
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}
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dstFD, err := os.OpenFile(dst, os.O_RDWR|os.O_CREATE|os.O_TRUNC, srcInfo.Mode())
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if err != nil {
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wwlog.Debug("Could not create destination file %s: %s", dst, err)
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return err
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}
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defer func() {
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if cerr := dstFD.Close(); cerr != nil && err == nil {
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err = cerr
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}
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}()
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bytes, err := io.Copy(dstFD, srcFD)
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if err != nil {
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wwlog.Debug("File copy from %s to %s failed.\n %s", src, dst, err)
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return err
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} else {
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wwlog.Debug("Copied %d bytes from %s to %s.", bytes, src, dst)
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}
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err = CopyUIDGID(src, dst)
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if err != nil {
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wwlog.Debug("Ownership copy from %s to %s failed.\n %s", src, dst, err)
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return err
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}
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return nil
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}
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func SafeCopyFile(src string, dst string) error {
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var err error
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// Don't overwrite existing files -- should add force overwrite switch
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if _, err = os.Stat(dst); err == nil {
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wwlog.Debug("Destination file %s exists.", dst)
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} else {
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err = CopyFile(src, dst)
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}
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return err
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}
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