int main(void)
{
#if _DEBUG
freopen("input.txt","r", stdin);
#endif
input_proc();
do_something();
output_proc();
return 0;
}
/**
* @author Tom Nightingale
*
* @brief The program's entry point.
* @details Initializes the processes and ports for IPC.
*/
int main() {
int pfd[3][2];
int i = 0;
int pid[2];
// Put keyboard into raw mode
system("stty raw -icanon igncr -echo");
// Open the pipes.
for (i = 0; i < 3; i++) {
if (pipe(pfd[i]) < 0) {
fatal("pipe call");
}
}
// Create 2 child processes; OUTPUT_PROC & TRANSLATE_PROC.
for (i = 0; i < 2; i++) {
if ((pid[i] = fork()) <= 0) {
switch (i) {
// Output process.
case OUTPUT_PROC:
// Closing unused pipe descriptors.
close(pfd[PIPE_INPUT_OUTPUT][WRITE]);
close(pfd[PIPE_TRANS_OUTPUT][WRITE]);
close(pfd[PIPE_INPUT_TRANSLATE][READ]);
close(pfd[PIPE_INPUT_TRANSLATE][WRITE]);
output_proc(pfd[PIPE_INPUT_OUTPUT][READ], pfd[PIPE_TRANS_OUTPUT][READ]);
return 0;
// Translate process.
case TRANSLATE_PROC:
// Closing unused pipe descriptors.
close(pfd[PIPE_INPUT_TRANSLATE][WRITE]);
close(pfd[PIPE_TRANS_OUTPUT][READ]);
close(pfd[PIPE_INPUT_OUTPUT][READ]);
close(pfd[PIPE_INPUT_OUTPUT][WRITE]);
translate_proc(pfd[PIPE_INPUT_TRANSLATE][READ], pfd[PIPE_TRANS_OUTPUT][WRITE]);
return 0;
}
}
}
// Input process (parent).
// Closing unused pipe descriptors.
close(pfd[PIPE_INPUT_OUTPUT][READ]);
close(pfd[PIPE_INPUT_TRANSLATE][READ]);
close(pfd[PIPE_TRANS_OUTPUT][READ]);
close(pfd[PIPE_TRANS_OUTPUT][WRITE]);
input_proc(pid, pfd[PIPE_INPUT_OUTPUT][WRITE], pfd[PIPE_INPUT_TRANSLATE][WRITE]);
// Return keyboard state.
system("stty -raw icanon -igncr echo");
return 0;
}
