int16_t _write(void)
{
inoptr ino;
uint8_t flag;
if (!valaddr(buf, nbytes))
return -1;
/* Set up u_base, u_offset, ino; check permissions, file num. */
if ((ino = rwsetup(false, &flag)) == NULLINODE)
return (-1); /* bomb out if error */
writei(ino, flag);
updoff();
return (udata.u_count);
}
arg_t _read(void)
{
inoptr ino;
uint8_t flag;
if (!nbytes)
return 0;
if (!valaddr(buf, nbytes))
return -1;
/* Set up u_base, u_offset, ino; check permissions, file num. */
if ((ino = rwsetup(true, &flag)) == NULLINODE)
return -1; /* bomb out if error */
readi(ino, flag);
updoff();
return (udata.u_count);
}
