uchar*
read9ppkt(Ioproc *io, int fd)
{
uchar buf[4], *pkt;
int n, nn;
n = ioreadn(io, fd, buf, 4);
if(n != 4)
return nil;
n = GBIT32(buf);
if(n > MAXMSGSIZE)
return nil;
pkt = emalloc(n);
PBIT32(pkt, n);
nn = ioreadn(io, fd, pkt+4, n-4);
if(nn != n-4){
free(pkt);
return nil;
}
/* would do this if we ever got one of these, but we only generate them
if(pkt[4] == Ropenfd){
newfd = iorecvfd(io, fd);
PBIT32(pkt+n-4, newfd);
}
*/
return pkt;
}
int
readibuf(Ibuf *b, char *buf, int len)
{
int n;
n = b->wp - b->rp;
if(n > 0){
if(n > len)
n = len;
memmove(buf, b->rp, n);
b->rp += n;
return n;
}
return ioreadn(b->io, b->fd, buf, len);
}
