//http://www2.cs.uregina.ca/~hamilton/courses/330/notes/unix/pipes/pipes.html #include #include int main() { int pid, pip[2]; char instring[20]; char * outstring = "Hello World!"; pipe(pip); pid = fork(); if (pid == 0) /* child : sends message to parent*/ { /* close read end */ close(pip[0]); /* send 7 characters in the string, including end-of-string */ write(pip[1], outstring, strlen(outstring)); /* close write end */ close(pip[1]); } else /* parent : receives message from child */ { /* close write end */ close(pip[1]); /* read from the pipe */ read(pip[0], instring, 7); /* close read end */ close(pip[0]); } return 0; }