feat: add sys attr copy and one to one copy

syscall_linux.go

@@ -0,0 +1,34 @@
+//go:build linux
+// +build linux
+
+package acp
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+)
+
+func truncate(file *os.File, size int64) error {
+	if err := syscall.Fallocate(int(file.Fd()), 0, 0, size); err != nil {
+		return err
+	}
+	return nil
+}
+
+func copyAttrs(name string, j *baseJob) error {
+	if err := os.Chmod(name, j.mode); err != nil {
+		return fmt.Errorf("chmod fail, %w", err)
+	}
+	if os.Geteuid() == 0 {
+		if stat, ok := j.sys.(*syscall.Stat_t); ok {
+			if err := os.Chown(name, int(stat.Uid), int(stat.Gid)); err != nil {
+				return fmt.Errorf("chown fail, %w", err)
+			}
+		}
+	}
+	if err := os.Chtimes(name, j.modTime, j.modTime); err != nil {
+		return fmt.Errorf("chtimes fail, %w", err)
+	}
+	return nil
+}