#include <u.h>#include <libc.h>#include <mpipe.h> /*	so I get a list 	that is right. 	that gives me a multipipe. 	so how do you do it in plan . 	so what are we doing?	so we have a multipipe. 	so now how do you connect it to the process? 	you can fork. 	you have a thread that does this. 	I have a worker to dispatch? 		rfork		Bugs:	so how do you deal with leftovers?	should sep handle them? 	should I return that?		that is the right semantics. 	dealt with. 		the splicer process reads from stdin. 		*/ Mpipe*mpipe(int (sep)(Mpipe*, char*, int, int*), int **fds, int n){	int i;	Mpipe *p;		p = malloc(sizeof(Mpipe));	p->sep = sep;	p->npipe = n;	p->fds = fds;	for(i = 0; i < p->npipe; i++)		pipe(p->fds[i]);	return p;	} /*// imaginary for later 	int i;	char **argv;		pipes = emalloc((p->npipe+3)*sizeof(char*));		switch(rfork()){	default:		break;	case 0:		argv[0] = splitter;		argv[1] = exec				for(i = 0; i < p->npipes; i++)			smprint		exec(splitter, argv);		break;	case -1:				sysfatal("fork failed: %r");		} 	free(pipes);  intmpipe(int **fd, int x){	char buf[8192];	int cfd, n;	snprint(buf, sizeof buf,  "/proc/%d/fd/ctl", pid);	cfd = open(buf, ORDWR);	fprint(cfd, "multipipe %d", x);	n = read(cfd, buf, sizeof buf);}      */