#include "substdio.h"

void substdio_fdbuf(s,op,fd,buf,len)

register substdio *s;

register int (*op)();

register int fd;

register char *buf;

register int len;

{

  s->x = buf;

  s->fd = fd;

  s->op = op;

  s->p = 0;

  s->n = len;

}