“pcntl_fork（）：错误12”是什么意思？

Question

I've searched until I was blue in the face and cannot find the answer to this question.

Where I can find a table listing the meanings of all the error codes for pcntl_fork()? Or even the C fork() function, for that matter.

Answer 1

The man page for the function describes the possible errors in the ERRORS section. The mapping between error name and number can be found in /usr/include/asm-generic/errno*.h, or via perror if you have MySQL installed.