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skywind3000 avatar skywind3000 commented on June 3, 2024 1

It is not a tty, in C standard library, if the process is running in a pipe, the stdout will be buffered until you call fflush or process exits.

So, the printf in line 7 is buffered with the later printf in line 11 or line 15 and the actual display happens in returns.

Since there is a fork, you will see two pid:xxxx.

To eliminate this, you should add a fflush(stdout); after line 7, this will ensure to display all the outputs of previous printfs.

from asyncrun.vim.

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