golang args 代码
文件路径：/src/cmd/internal/sys/args.go
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sys
// ExecArgLengthLimit is the number of bytes we can safely
// pass as arguments to an exec.Command.
//
// Windows has a limit of 32 KB. To be conservative and not worry about whether
// that includes spaces or not, just use 30 KB. Darwin's limit is less clear.
// The OS claims 256KB, but we've seen failures with arglen as small as 50KB.
const ExecArgLengthLimit = (30 << 10)