fork Cocoa 进程并重新初始化 Cocoa。如何？
我尝试 fork() 一个 Cocoa 进程并设置一个新的 Cocoa/ObjC 环境，但出现错误：
The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug.
有没有办法在分叉进程中重新初始化 Cocoa/ObjC？
我知道有关 fork() 的文档确实说它是有限的，但是我想知道是否还有办法做到这一点，而不仅仅是文档所说的。
我尝试阅读 处理 execve 系统调用的 XNU 内核的源代码（bsd/kern/kern_exec.c） 但我不太习惯这些代码，所以我不能轻易地说它是否可能是否在用户空间中执行类似的操作。
I tried to fork() a Cocoa process and setup a new Cocoa/ObjC environment but I get the error:
The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug.
Is there a way to re-initialize Cocoa/ObjC in the forked process?
I know that the documentation about fork() does say it is limited, however I wonder if there is still a way to do it, not just what the documentation says.
I tried to read the source code of the XNU kernel which handles the execve syscall (bsd/kern/kern_exec.c) but I am not that used to the code that I cannot easily say wether it is possible or not to do something similar in userspace or not.
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Mac OS X 严重限制了您在 fork 后无需执行即可执行的操作。请参阅 fork man 的“注意事项”部分页面。允许的操作不包括使用 Cocoa 或 CoreFoundation，因此您必须调用 exec 来启动新程序。
Mac OS X severely limits what you can do after a fork without
execing. See the CAVEATS section of the fork man page. The allowed actions do not include using Cocoa or CoreFoundation, so you must callexecto start a new program.