Hoshino Lina 49708181b5
libobs/util: Fix fd management in os_process_pipe_create ...
The sequence should be the same for every fd:
- Close the parent end of the pipe
- If the child end of the pipe is not the intended fd already,
- Dup it over
- And close the old fd
This fixes a double-close() in the read path (which is fairly harmless
since it happens in the child, but sticks out in strace), some fd
leakage, and the stderr-already-is-2 case.
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49708181b5