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restic/internal/selfupdate/download_windows.go
Matt LaPlante 0ba9d4ced7 Refactor file handing for self-update.
* Write new file payload to a temp file before touching the original
binary. Minimizes the possibility of failing mid-write and corrupting
the binary.
* On Windows, move the original binary out to a temp file rather than
removing it as the running binary is locked. Fixes issue #2248.
2022-04-09 21:40:33 +02:00

24 lines
557 B
Go

//go:build windows
// +build windows
package selfupdate
import (
"fmt"
"os"
"path/filepath"
)
// Rename (rather than remove) the running version. The running binary will be locked
// on Windows and cannot be removed while still executing.
func removeResticBinary(dir, target string) error {
backup := filepath.Join(dir, filepath.Base(target)+".bak")
if _, err := os.Stat(backup); err == nil {
_ = os.Remove(backup)
}
if err := os.Rename(target, backup); err != nil {
return fmt.Errorf("unable to rename target file: %v", err)
}
return nil
}