1 #include "substdio.h"

     2 

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

     4 register substdio *s;

     5 register int (*op)();

     6 register int fd;

     7 register char *buf;

     8 register int len;

     9 {

    10   s->x = buf;

    11   s->fd = fd;

    12   s->op = op;

    13   s->p = 0;

    14   s->n = len;

    15 }