类型: 仅文档
不带参数调用 process.umask() 会导致进程范围的 umask 被写入两次。
这会在线程之间引入竞争条件，并且是一个潜在的安全漏洞。
没有安全、跨平台的替代 API。
Type: Documentation-only
Calling process.umask() with no argument causes the process-wide umask to be
written twice. This introduces a race condition between threads, and is a
potential security vulnerability. There is no safe, cross-platform alternative
API.
