[프로그래밍] 간단한 pipe()에 대한 소스

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

main()

{

int fds[2];

pipe(fds); /* Create the pipe */

/* First child reconnects stdin to downstream end of pipe

  and closes the upstream end

*/

if (fork() == 0) {

dup2(fds[0], 0);

close(fds[1]);

execlp("sort", "sort", 0);

}

/* Second child reconnects stdout to upstream end of pipe

  and closes the downstream end

*/

else if (fork() == 0) {

dup2(fds[1], 1);

close(fds[0]);

execlp("who", "who", 0);

}

/* Parent closes both ends of pipe and waits for both children

  to finish

*/

else {

close(fds[0]);

close(fds[1]);

wait(0);

wait(0);

}

}