/*
* ttsetcompat
*
* Description: Convert backward compatability set command arguments as
* follows:
*
* TIOCSETP -> TIOSETAF
* TIOCSETN -> TIOCSETA
* TIOCSETC -> TIOCSETA
* TIOCSLTC -> TIOCSETA
* TIOCLBIS -> TIOCSETA
* TIOCLBIC -> TIOCSETA
* TIOCLSET -> TIOCSETA
*
* The converted command argument and potentially modified 'term'
* argument are returned to ttcompat(), which will then call
* ttioctl_locked(), if this function returns successfully.
*
* Parameters struct tty *tp The tty on which the operation is
* being performed.
* u_long *com A pointer to the terminal input/output
* command being requested; its contents
* will be modified per the table above,
* on a non-error return.
* caddr_t data Command specific parameter data; this
* data is read but not modified.
* struct termios *term A local stack termios structure from
* ttcompat(), whose contents are to be
* modified based on *com and *data.
*
* Returns: EINVAL An input speed or output speed is
* outside the allowable range for a
* TIOCSETP or TIOCSETN command.
* 0 All other cases return 0.
*
* Notes: This function may modify the contents of the tp->t_flags
* field in a successful call to TIOCSETP, TIOCSETN, TIOCLBIS,
* TIOCLBIC, or TIOCLSET.
*
* All other tp fields will remain unmodifed, since the struct
* termios is a local stack copy from ttcompat(), and not the
* real thing. A subsequent call to ttioctl_locked() in
* ttcompat(), however, may result in subsequent changes.
*
* WARNING: This compatibility code is not 6/432 clean; it will only
* work for 32 bit processes on 32 bit kernels or 64 bit
* processes on 64 bit kernels. We are not addressing this
* due to <rdar://6904053>.
*/
static int
ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
{
switch (*com) {
case TIOCSETP:
/*
* Wait for all characters queued for output to drain, then
* Discard all characters queued for input, and then set
* the input and output speeds and device flags, per the
* contents of the struct sgttyb that 'data' points to.
*/
case TIOCSETN:
/*
* Same as TIOCSETP, but the output is not drained, and any
* pending input is not discarded.
*/
{
register struct sgttyb *sg = (struct sgttyb *)data;
int speed;
if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
return(EINVAL);
else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds))
term->c_ispeed = compatspcodes[speed];
else
term->c_ispeed = tp->t_ispeed;
if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
return(EINVAL);
else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds))
term->c_ospeed = compatspcodes[speed];
else
term->c_ospeed = tp->t_ospeed;
term->c_cc[VERASE] = sg->sg_erase;
term->c_cc[VKILL] = sg->sg_kill;
tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
ttcompatsetflags(tp, term);
*com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
break;
}
case TIOCSETC:
/*
* Set the terminal control characters per the contents of
* the struct tchars that 'data' points to.
*/
{
struct tchars *tc = (struct tchars *)data;
register cc_t *cc;
cc = term->c_cc;
cc[VINTR] = tc->t_intrc;
cc[VQUIT] = tc->t_quitc;
cc[VSTART] = tc->t_startc;
cc[VSTOP] = tc->t_stopc;
cc[VEOF] = tc->t_eofc;
cc[VEOL] = tc->t_brkc;
if (tc->t_brkc == -1)
cc[VEOL2] = _POSIX_VDISABLE;
*com = TIOCSETA;
break;
}
case TIOCSLTC:
/*
* Set the terminal control characters per the contents of
* the struct ltchars that 'data' points to.
*/
{
struct ltchars *ltc = (struct ltchars *)data;
register cc_t *cc;
cc = term->c_cc;
cc[VSUSP] = ltc->t_suspc;
cc[VDSUSP] = ltc->t_dsuspc;
cc[VREPRINT] = ltc->t_rprntc;
cc[VDISCARD] = ltc->t_flushc;
cc[VWERASE] = ltc->t_werasc;
cc[VLNEXT] = ltc->t_lnextc;
*com = TIOCSETA;
break;
}
case TIOCLBIS:
/*
* Set the bits in the terminal state local flags word
* (16 bits) for the terminal to the current bits OR
* those in the 16 bit value pointed to by 'data'.
*/
case TIOCLBIC:
/*
* Clear the bits in the terminal state local flags word
* for the terminal to the current bits AND those bits NOT
* in the 16 bit value pointed to by 'data'.
*/
case TIOCLSET:
/*
* Set the terminal state local flags word to exactly those
* bits that correspond to the 16 bit value pointed to by
* 'data'.
*/
if (*com == TIOCLSET)
tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16;
else {
tp->t_flags =
(ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
if (*com == TIOCLBIS)
tp->t_flags |= *(int *)data<<16;
else
tp->t_flags &= ~(*(int *)data<<16);
}
ttcompatsetlflags(tp, term);
*com = TIOCSETA;
break;
}
return 0;
}
int
ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
{
switch (*com) {
case TIOCSETP:
case TIOCSETN: {
struct sgttyb *sg = (struct sgttyb *)data;
int speed;
if ((speed = sg->sg_ispeed) > MAX_SPEED || speed < 0)
return(EINVAL);
else if (speed != ttcompatspeedtab(tp->t_ispeed, compatspeeds))
term->c_ispeed = compatspcodes[speed];
else
term->c_ispeed = tp->t_ispeed;
if ((speed = sg->sg_ospeed) > MAX_SPEED || speed < 0)
return(EINVAL);
else if (speed != ttcompatspeedtab(tp->t_ospeed, compatspeeds))
term->c_ospeed = compatspcodes[speed];
else
term->c_ospeed = tp->t_ospeed;
term->c_cc[VERASE] = sg->sg_erase;
term->c_cc[VKILL] = sg->sg_kill;
tp->t_flags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff);
ttcompatsetflags(tp, term);
*com = (*com == TIOCSETP) ? TIOCSETAF : TIOCSETA;
break;
}
case TIOCSETC: {
struct tchars *tc = (struct tchars *)data;
cc_t *cc;
cc = term->c_cc;
cc[VINTR] = tc->t_intrc;
cc[VQUIT] = tc->t_quitc;
cc[VSTART] = tc->t_startc;
cc[VSTOP] = tc->t_stopc;
cc[VEOF] = tc->t_eofc;
cc[VEOL] = tc->t_brkc;
if (tc->t_brkc == -1)
cc[VEOL2] = _POSIX_VDISABLE;
*com = TIOCSETA;
break;
}
case TIOCSLTC: {
struct ltchars *ltc = (struct ltchars *)data;
cc_t *cc;
cc = term->c_cc;
cc[VSUSP] = ltc->t_suspc;
cc[VDSUSP] = ltc->t_dsuspc;
cc[VREPRINT] = ltc->t_rprntc;
cc[VDISCARD] = ltc->t_flushc;
cc[VWERASE] = ltc->t_werasc;
cc[VLNEXT] = ltc->t_lnextc;
*com = TIOCSETA;
break;
}
case TIOCLBIS:
case TIOCLBIC:
case TIOCLSET:
if (*com == TIOCLSET)
tp->t_flags = (tp->t_flags&0xffff) | *(int *)data<<16;
else {
tp->t_flags =
(ttcompatgetflags(tp)&0xffff0000)|(tp->t_flags&0xffff);
if (*com == TIOCLBIS)
tp->t_flags |= *(int *)data<<16;
else
tp->t_flags &= ~(*(int *)data<<16);
}
ttcompatsetlflags(tp, term);
*com = TIOCSETA;
break;
}
return 0;
}