#include #include #include #include "check.h" int main(void) { int chan[2]; int status; pipe(chan); if (fork() > 0) { dup2(chan[0], STDIN_FILENO); if (yorn("Do you really wanna do this (y/N)? ")) { printf("Affirmative!\n"); _exit(0); } printf("OK, aborting!\n"); _exit(1); } sleep(1); if (write(chan[1], "Y", 1) != 1) return 1; wait(&status); return WEXITSTATUS(status); }