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Hi guys.

how to inform OS to send a signal like SIGIO every time input comes in on stdin, I tried to use ioctl and fcntl, but both failed, so can anyone help me figure it out, thanks!

You're right, thank you so much, you remind me of a very good way to solve this problem.

Promble solved! Thanks to salem!

I wrote the following code to test the order in which function arguments are put onto the stack, and I got wired result:


void print_char(char c1, char c2)
{...