feat(cleanup): 添加启动时清理日志的功能和--cleanup标志支持

codex-wrapper/process_check_unix.go

@@ -0,0 +1,30 @@
+//go:build unix || darwin || linux
+// +build unix darwin linux
+
+package main
+
+import (
+	"errors"
+	"os"
+	"syscall"
+)
+
+var findProcess = os.FindProcess
+
+// isProcessRunning returns true if a process with the given pid is running on Unix-like systems.
+func isProcessRunning(pid int) bool {
+	if pid <= 0 {
+		return false
+	}
+
+	proc, err := findProcess(pid)
+	if err != nil || proc == nil {
+		return false
+	}
+
+	err = proc.Signal(syscall.Signal(0))
+	if err != nil && (errors.Is(err, syscall.ESRCH) || errors.Is(err, os.ErrProcessDone)) {
+		return false
+	}
+	return true
+}