Minix2.0/src/kernel/tty.c
/* This file contains the terminal driver, both for the IBM console and regular
* ASCII terminals. It handles only the device-independent part of a TTY, the
* device dependent parts are in console.c, rs232.c, etc. This file contains
* two main entry points, tty_task() and tty_wakeup(), and several minor entry
* points for use by the device-dependent code.
*
* The device-independent part accepts "keyboard" input from the device-
* dependent part, performs input processing (special key interpretation),
* and sends the input to a process reading from the TTY. Output to a TTY
* is sent to the device-dependent code for output processing and "screen"
* display. Input processing is done by the device by calling 'in_process'
* on the input characters, output processing may be done by the device itself
* or by calling 'out_process'. The TTY takes care of input queuing, the
* device does the output queuing. If a device receives an external signal,
* like an interrupt, then it causes tty_wakeup() to be run by the CLOCK task
* to, you guessed it, wake up the TTY to check if input or output can
* continue.
*
* The valid messages and their parameters are:
*
* HARD_INT: output has been completed or input has arrived
* DEV_READ: a process wants to read from a terminal
* DEV_WRITE: a process wants to write on a terminal
* DEV_IOCTL: a process wants to change a terminal's parameters
* DEV_OPEN: a tty line has been opened
* DEV_CLOSE: a tty line has been closed
* CANCEL: terminate a previous incomplete system call immediately
*
* m_type TTY_LINE PROC_NR COUNT TTY_SPEK TTY_FLAGS ADDRESS
* ---------------------------------------------------------------------------
* | HARD_INT | | | | | | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_READ |minor dev| proc nr | count | O_NONBLOCK| buf ptr |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_WRITE |minor dev| proc nr | count | | | buf ptr |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_IOCTL |minor dev| proc nr |func code|erase etc| flags | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_OPEN |minor dev| proc nr | O_NOCTTY| | | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | DEV_CLOSE |minor dev| proc nr | | | | |
* |-------------+---------+---------+---------+---------+---------+---------|
* | CANCEL |minor dev| proc nr | | | | |
* ---------------------------------------------------------------------------
*/
#include "kernel.h"
#include <termios.h>
#if ENABLE_SRCCOMPAT || ENABLE_BINCOMPAT
#include <sgtty.h>
#endif
#include <sys/ioctl.h>
#include <signal.h>
#include <minix/callnr.h>
#include <minix/com.h>
#if (CHIP == INTEL)
#include <minix/keymap.h>
#endif
#include "tty.h"
#include "proc.h"
/* Address of a tty structure. */
#define tty_addr(line) (&tty_table[line])
/* First minor numbers for the various classes of TTY devices. */
#define CONS_MINOR 0
#define LOG_MINOR 15
#define RS232_MINOR 16
#define TTYPX_MINOR 128
#define PTYPX_MINOR 192
/* Macros for magic tty types. */
#define isconsole(tp) ((tp) < tty_addr(NR_CONS))
/* Macros for magic tty structure pointers. */
#define FIRST_TTY tty_addr(0)
#define END_TTY tty_addr(sizeof(tty_table) / sizeof(tty_table[0]))
/* A device exists if at least its 'devread' function is defined. */
#define tty_active(tp) ((tp)->tty_devread != NULL)
/* RS232 lines or pseudo terminals can be completely configured out. */
#if NR_RS_LINES == 0
#define rs_init(tp) ((void) 0)
#endif
#if NR_PTYS == 0
#define pty_init(tp) ((void) 0)
#define do_pty(tp, mp) ((void) 0)
#endif
FORWARD _PROTOTYPE( void do_cancel, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void do_ioctl, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void do_open, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void do_close, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void do_read, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void do_write, (tty_t *tp, message *m_ptr) );
FORWARD _PROTOTYPE( void in_transfer, (tty_t *tp) );
FORWARD _PROTOTYPE( int echo, (tty_t *tp, int ch) );
FORWARD _PROTOTYPE( void rawecho, (tty_t *tp, int ch) );
FORWARD _PROTOTYPE( int back_over, (tty_t *tp) );
FORWARD _PROTOTYPE( void reprint, (tty_t *tp) );
FORWARD _PROTOTYPE( void dev_ioctl, (tty_t *tp) );
FORWARD _PROTOTYPE( void setattr, (tty_t *tp) );
FORWARD _PROTOTYPE( void tty_icancel, (tty_t *tp) );
FORWARD _PROTOTYPE( void tty_init, (tty_t *tp) );
FORWARD _PROTOTYPE( void settimer, (tty_t *tp, int on) );
#if ENABLE_SRCCOMPAT || ENABLE_BINCOMPAT
FORWARD _PROTOTYPE( int compat_getp, (tty_t *tp, struct sgttyb *sg) );
FORWARD _PROTOTYPE( int compat_getc, (tty_t *tp, struct tchars *sg) );
FORWARD _PROTOTYPE( int compat_setp, (tty_t *tp, struct sgttyb *sg) );
FORWARD _PROTOTYPE( int compat_setc, (tty_t *tp, struct tchars *sg) );
FORWARD _PROTOTYPE( int tspd2sgspd, (speed_t tspd) );
FORWARD _PROTOTYPE( speed_t sgspd2tspd, (int sgspd) );
#if ENABLE_BINCOMPAT
FORWARD _PROTOTYPE( void do_ioctl_compat, (tty_t *tp, message *m_ptr) );
#endif
#endif
/* Default attributes. */
PRIVATE struct termios termios_defaults = {
TINPUT_DEF, TOUTPUT_DEF, TCTRL_DEF, TLOCAL_DEF, TSPEED_DEF, TSPEED_DEF,
{
TEOF_DEF, TEOL_DEF, TERASE_DEF, TINTR_DEF, TKILL_DEF, TMIN_DEF,
TQUIT_DEF, TTIME_DEF, TSUSP_DEF, TSTART_DEF, TSTOP_DEF,
TREPRINT_DEF, TLNEXT_DEF, TDISCARD_DEF,
},
};
PRIVATE struct winsize winsize_defaults; /* = all zeroes */
/*===========================================================================*
* tty_task *
*===========================================================================*/
PUBLIC void tty_task()
{
/* Main routine of the terminal task. */
message tty_mess; /* buffer for all incoming messages */
register tty_t *tp;
unsigned line;
/* Initialize the terminal lines. */
for (tp = FIRST_TTY; tp < END_TTY; tp++) tty_init(tp);
/* Display the Minix startup banner. */
printf("Minix %s.%s Copyright 1997 Prentice-Hall, Inc.\n\n",
OS_RELEASE, OS_VERSION);
#if (CHIP == INTEL)
/* Real mode, or 16/32-bit protected mode? */
#if _WORD_SIZE == 4
printf("Executing in 32-bit protected mode\n\n");
#else
printf("Executing in %s mode\n\n",
protected_mode ? "16-bit protected" : "real");
#endif
#endif
while (TRUE) {
/* Handle any events on any of the ttys. */
for (tp = FIRST_TTY; tp < END_TTY; tp++) {
if (tp->tty_events) handle_events(tp);
}
receive(ANY, &tty_mess);
/* A hardware interrupt is an invitation to check for events. */
if (tty_mess.m_type == HARD_INT) continue;
/* Check the minor device number. */
line = tty_mess.TTY_LINE;
if ((line - CONS_MINOR) < NR_CONS) {
tp = tty_addr(line - CONS_MINOR);
} else
if (line == LOG_MINOR) {
tp = tty_addr(0);
} else
if ((line - RS232_MINOR) < NR_RS_LINES) {
tp = tty_addr(line - RS232_MINOR + NR_CONS);
} else
if ((line - TTYPX_MINOR) < NR_PTYS) {
tp = tty_addr(line - TTYPX_MINOR + NR_CONS + NR_RS_LINES);
} else
if ((line - PTYPX_MINOR) < NR_PTYS) {
tp = tty_addr(line - PTYPX_MINOR + NR_CONS + NR_RS_LINES);
do_pty(tp, &tty_mess);
continue; /* this is a pty, not a tty */
} else {
tp = NULL;
}
/* If the device doesn't exist or is not configured return ENXIO. */
if (tp == NULL || !tty_active(tp)) {
tty_reply(TASK_REPLY, tty_mess.m_source,
tty_mess.PROC_NR, ENXIO);
continue;
}
/* Execute the requested function. */
switch (tty_mess.m_type) {
case DEV_READ: do_read(tp, &tty_mess); break;
case DEV_WRITE: do_write(tp, &tty_mess); break;
case DEV_IOCTL: do_ioctl(tp, &tty_mess); break;
case DEV_OPEN: do_open(tp, &tty_mess); break;
case DEV_CLOSE: do_close(tp, &tty_mess); break;
case CANCEL: do_cancel(tp, &tty_mess); break;
default: tty_reply(TASK_REPLY, tty_mess.m_source,
tty_mess.PROC_NR, EINVAL);
}
}
}
/*===========================================================================*
* do_read *
*===========================================================================*/
PRIVATE void do_read(tp, m_ptr)
register tty_t *tp; /* pointer to tty struct */
message *m_ptr; /* pointer to message sent to the task */
{
/* A process wants to read from a terminal. */
int r;
/* Check if there is already a process hanging in a read, check if the
* parameters are correct, do I/O.
*/
if (tp->tty_inleft > 0) {
r = EIO;
} else
if (m_ptr->COUNT <= 0) {
r = EINVAL;
} else
if (numap(m_ptr->PROC_NR, (vir_bytes) m_ptr->ADDRESS, m_ptr->COUNT) == 0) {
r = EFAULT;
} else {
/* Copy information from the message to the tty struct. */
tp->tty_inrepcode = TASK_REPLY;
tp->tty_incaller = m_ptr->m_source;
tp->tty_inproc = m_ptr->PROC_NR;
tp->tty_in_vir = (vir_bytes) m_ptr->ADDRESS;
tp->tty_inleft = m_ptr->COUNT;
if (!(tp->tty_termios.c_lflag & ICANON)
&& tp->tty_termios.c_cc[VTIME] > 0) {
if (tp->tty_termios.c_cc[VMIN] == 0) {
/* MIN & TIME specify a read timer that finishes the
* read in TIME/10 seconds if no bytes are available.
*/
lock();
settimer(tp, TRUE);
tp->tty_min = 1;
unlock();
} else {
/* MIN & TIME specify an inter-byte timer that may
* have to be cancelled if there are no bytes yet.
*/
if (tp->tty_eotct == 0) {
lock();
settimer(tp, FALSE);
unlock();
tp->tty_min = tp->tty_termios.c_cc[VMIN];
}
}
}
/* Anything waiting in the input buffer? Clear it out... */
in_transfer(tp);
/* ...then go back for more */
handle_events(tp);
if (tp->tty_inleft == 0) return; /* already done */
/* There were no bytes in the input queue available, so either suspend
* the caller or break off the read if nonblocking.
*/
if (m_ptr->TTY_FLAGS & O_NONBLOCK) {
r = EAGAIN; /* cancel the read */
tp->tty_inleft = tp->tty_incum = 0;
} else {
r = SUSPEND; /* suspend the caller */
tp->tty_inrepcode = REVIVE;
}
}
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, r);
}
/*===========================================================================*
* do_write *
*===========================================================================*/
PRIVATE void do_write(tp, m_ptr)
register tty_t *tp;
register message *m_ptr; /* pointer to message sent to the task */
{
/* A process wants to write on a terminal. */
int r;
/* Check if there is already a process hanging in a write, check if the
* parameters are correct, do I/O.
*/
if (tp->tty_outleft > 0) {
r = EIO;
} else
if (m_ptr->COUNT <= 0) {
r = EINVAL;
} else
if (numap(m_ptr->PROC_NR, (vir_bytes) m_ptr->ADDRESS, m_ptr->COUNT) == 0) {
r = EFAULT;
} else {
/* Copy message parameters to the tty structure. */
tp->tty_outrepcode = TASK_REPLY;
tp->tty_outcaller = m_ptr->m_source;
tp->tty_outproc = m_ptr->PROC_NR;
tp->tty_out_vir = (vir_bytes) m_ptr->ADDRESS;
tp->tty_outleft = m_ptr->COUNT;
/* Try to write. */
handle_events(tp);
if (tp->tty_outleft == 0) return; /* already done */
/* None or not all the bytes could be written, so either suspend the
* caller or break off the write if nonblocking.
*/
if (m_ptr->TTY_FLAGS & O_NONBLOCK) { /* cancel the write */
r = tp->tty_outcum > 0 ? tp->tty_outcum : EAGAIN;
tp->tty_outleft = tp->tty_outcum = 0;
} else {
r = SUSPEND; /* suspend the caller */
tp->tty_outrepcode = REVIVE;
}
}
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, r);
}
/*===========================================================================*
* do_ioctl *
*===========================================================================*/
PRIVATE void do_ioctl(tp, m_ptr)
register tty_t *tp;
message *m_ptr; /* pointer to message sent to task */
{
/* Perform an IOCTL on this terminal. Posix termios calls are handled
* by the IOCTL system call
*/
int r;
union {
int i;
#if ENABLE_SRCCOMPAT
struct sgttyb sg;
struct tchars tc;
#endif
} param;
phys_bytes user_phys;
size_t size;
/* Size of the ioctl parameter. */
switch (m_ptr->TTY_REQUEST) {
case TCGETS: /* Posix tcgetattr function */
case TCSETS: /* Posix tcsetattr function, TCSANOW option */
case TCSETSW: /* Posix tcsetattr function, TCSADRAIN option */
case TCSETSF: /* Posix tcsetattr function, TCSAFLUSH option */
size = sizeof(struct termios);
break;
case TCSBRK: /* Posix tcsendbreak function */
case TCFLOW: /* Posix tcflow function */
case TCFLSH: /* Posix tcflush function */
case TIOCGPGRP: /* Posix tcgetpgrp function */
case TIOCSPGRP: /* Posix tcsetpgrp function */
size = sizeof(int);
break;
case TIOCGWINSZ: /* get window size (not Posix) */
case TIOCSWINSZ: /* set window size (not Posix) */
size = sizeof(struct winsize);
break;
#if ENABLE_SRCCOMPAT
case TIOCGETP: /* BSD-style get terminal properties */
case TIOCSETP: /* BSD-style set terminal properties */
size = sizeof(struct sgttyb);
break;
case TIOCGETC: /* BSD-style get terminal special characters */
case TIOCSETC: /* BSD-style get terminal special characters */
size = sizeof(struct tchars);
break;
#endif
#if (MACHINE == IBM_PC)
case KIOCSMAP: /* load keymap (Minix extension) */
size = sizeof(keymap_t);
break;
case TIOCSFON: /* load font (Minix extension) */
size = sizeof(u8_t [8192]);
break;
#endif
case TCDRAIN: /* Posix tcdrain function -- no parameter */
default: size = 0;
}
if (size != 0) {
user_phys = numap(m_ptr->PROC_NR, (vir_bytes) m_ptr->ADDRESS, size);
if (user_phys == 0) {
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, EFAULT);
return;
}
}
r = OK;
switch (m_ptr->TTY_REQUEST) {
case TCGETS:
/* Get the termios attributes. */
phys_copy(vir2phys(&tp->tty_termios), user_phys, (phys_bytes) size);
break;
case TCSETSW:
case TCSETSF:
case TCDRAIN:
if (tp->tty_outleft > 0) {
/* Wait for all ongoing output processing to finish. */
tp->tty_iocaller = m_ptr->m_source;
tp->tty_ioproc = m_ptr->PROC_NR;
tp->tty_ioreq = m_ptr->REQUEST;
tp->tty_iovir = (vir_bytes) m_ptr->ADDRESS;
r = SUSPEND;
break;
}
if (m_ptr->TTY_REQUEST == TCDRAIN) break;
if (m_ptr->TTY_REQUEST == TCSETSF) tty_icancel(tp);
/*FALL THROUGH*/
case TCSETS:
/* Set the termios attributes. */
phys_copy(user_phys, vir2phys(&tp->tty_termios), (phys_bytes) size);
setattr(tp);
break;
case TCFLSH:
phys_copy(user_phys, vir2phys(¶m.i), (phys_bytes) size);
switch (param.i) {
case TCIFLUSH: tty_icancel(tp); break;
case TCOFLUSH: (*tp->tty_ocancel)(tp); break;
case TCIOFLUSH: tty_icancel(tp); (*tp->tty_ocancel)(tp);break;
default: r = EINVAL;
}
break;
case TCFLOW:
phys_copy(user_phys, vir2phys(¶m.i), (phys_bytes) size);
switch (param.i) {
case TCOOFF:
case TCOON:
tp->tty_inhibited = (param.i == TCOOFF);
tp->tty_events = 1;
break;
case TCIOFF:
(*tp->tty_echo)(tp, tp->tty_termios.c_cc[VSTOP]);
break;
case TCION:
(*tp->tty_echo)(tp, tp->tty_termios.c_cc[VSTART]);
break;
default:
r = EINVAL;
}
break;
case TCSBRK:
if (tp->tty_break != NULL) (*tp->tty_break)(tp);
break;
case TIOCGWINSZ:
phys_copy(vir2phys(&tp->tty_winsize), user_phys, (phys_bytes) size);
break;
case TIOCSWINSZ:
phys_copy(user_phys, vir2phys(&tp->tty_winsize), (phys_bytes) size);
/* SIGWINCH... */
break;
#if ENABLE_SRCCOMPAT
case TIOCGETP:
compat_getp(tp, ¶m.sg);
phys_copy(vir2phys(¶m.sg), user_phys, (phys_bytes) size);
break;
case TIOCSETP:
phys_copy(user_phys, vir2phys(¶m.sg), (phys_bytes) size);
compat_setp(tp, ¶m.sg);
break;
case TIOCGETC:
compat_getc(tp, ¶m.tc);
phys_copy(vir2phys(¶m.tc), user_phys, (phys_bytes) size);
break;
case TIOCSETC:
phys_copy(user_phys, vir2phys(¶m.tc), (phys_bytes) size);
compat_setc(tp, ¶m.tc);
break;
#endif
#if (MACHINE == IBM_PC)
case KIOCSMAP:
/* Load a new keymap (only /dev/console). */
if (isconsole(tp)) r = kbd_loadmap(user_phys);
break;
case TIOCSFON:
/* Load a font into an EGA or VGA card (hs@hck.hr) */
if (isconsole(tp)) r = con_loadfont(user_phys);
break;
#endif
#if (MACHINE == ATARI)
case VDU_LOADFONT:
r = vdu_loadfont(m_ptr);
break;
#endif
/* These Posix functions are allowed to fail if _POSIX_JOB_CONTROL is
* not defined.
*/
case TIOCGPGRP:
case TIOCSPGRP:
default:
#if ENABLE_BINCOMPAT
do_ioctl_compat(tp, m_ptr);
return;
#else
r = ENOTTY;
#endif
}
/* Send the reply. */
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, r);
}
/*===========================================================================*
* do_open *
*===========================================================================*/
PRIVATE void do_open(tp, m_ptr)
register tty_t *tp;
message *m_ptr; /* pointer to message sent to task */
{
/* A tty line has been opened. Make it the callers controlling tty if
* O_NOCTTY is *not* set and it is not the log device. 1 is returned if
* the tty is made the controlling tty, otherwise OK or an error code.
*/
int r = OK;
if (m_ptr->TTY_LINE == LOG_MINOR) {
/* The log device is a write-only diagnostics device. */
if (m_ptr->COUNT & R_BIT) r = EACCES;
} else {
if (!(m_ptr->COUNT & O_NOCTTY)) {
tp->tty_pgrp = m_ptr->PROC_NR;
r = 1;
}
tp->tty_openct++;
}
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, r);
}
/*===========================================================================*
* do_close *
*===========================================================================*/
PRIVATE void do_close(tp, m_ptr)
register tty_t *tp;
message *m_ptr; /* pointer to message sent to task */
{
/* A tty line has been closed. Clean up the line if it is the last close. */
if (m_ptr->TTY_LINE != LOG_MINOR && --tp->tty_openct == 0) {
tp->tty_pgrp = 0;
tty_icancel(tp);
(*tp->tty_ocancel)(tp);
(*tp->tty_close)(tp);
tp->tty_termios = termios_defaults;
tp->tty_winsize = winsize_defaults;
setattr(tp);
}
tty_reply(TASK_REPLY, m_ptr->m_source, m_ptr->PROC_NR, OK);
}
/*===========================================================================*
* do_cancel *
*===========================================================================*/
PRIVATE void do_cancel(tp, m_ptr)
register tty_t *tp;
message *m_ptr; /* pointer to message sent to task */
{
/* A signal has been sent to a process that is hanging trying to read or write.
* The pending read or write must be finished off immediately.
*/
int proc_nr;
int mode;
/* Check the parameters carefully, to avoid cancelling twice. */
proc_nr = m_ptr->PROC_NR;
mode = m_ptr->COUNT;
if ((mode & R_BIT) && tp->tty_inleft != 0 && proc_nr == tp->tty_inproc) {
/* Process was reading when killed. Clean up input. */
tty_icancel(tp);
tp->tty_inleft = tp->tty_incum = 0;
}
if ((mode & W_BIT) && tp->tty_outleft != 0 && proc_nr == tp->tty_outproc) {
/* Process was writing when killed. Clean up output. */
(*tp->tty_ocancel)(tp);
tp->tty_outleft = tp->tty_outcum = 0;
}
if (tp->tty_ioreq != 0 && proc_nr == tp->tty_ioproc) {
/* Process was waiting for output to drain. */
tp->tty_ioreq = 0;
}
tp->tty_events = 1;
tty_reply(TASK_REPLY, m_ptr->m_source, proc_nr, EINTR);
}
/*===========================================================================*
* handle_events *
*===========================================================================*/
PUBLIC void handle_events(tp)
tty_t *tp; /* TTY to check for events. */
{
/* Handle any events pending on a TTY. These events are usually device
* interrupts.
*
* Two kinds of events are prominent:
* - a character has been received from the console or an RS232 line.
* - an RS232 line has completed a write request (on behalf of a user).
* The interrupt handler may delay the interrupt message at its discretion
* to avoid swamping the TTY task. Messages may be overwritten when the
* lines are fast or when there are races between different lines, input
* and output, because MINIX only provides single buffering for interrupt
* messages (in proc.c). This is handled by explicitly checking each line
* for fresh input and completed output on each interrupt.
*/
char *buf;
unsigned count;
do {
tp->tty_events = 0;
/* Read input and perform input processing. */
(*tp->tty_devread)(tp);
/* Perform output processing and write output. */
(*tp->tty_devwrite)(tp);
/* Ioctl waiting for some event? */
if (tp->tty_ioreq != 0) dev_ioctl(tp);
} while (tp->tty_events);
/* Transfer characters from the input queue to a waiting process. */
in_transfer(tp);
/* Reply if enough bytes are available. */
if (tp->tty_incum >= tp->tty_min && tp->tty_inleft > 0) {
tty_reply(tp->tty_inrepcode, tp->tty_incaller, tp->tty_inproc,
tp->tty_incum);
tp->tty_inleft = tp->tty_incum = 0;
}
}
/*===========================================================================*
* in_transfer *
*===========================================================================*/
PRIVATE void in_transfer(tp)
register tty_t *tp; /* pointer to terminal to read from */
{
/* Transfer bytes from the input queue to a process reading from a terminal. */
int ch;
int count;
phys_bytes buf_phys, user_base;
char buf[64], *bp;
/* Anything to do? */
if (tp->tty_inleft == 0 || tp->tty_eotct < tp->tty_min) return;
buf_phys = vir2phys(buf);
user_base = proc_vir2phys(proc_addr(tp->tty_inproc), 0);
bp = buf;
while (tp->tty_inleft > 0 && tp->tty_eotct > 0) {
ch = *tp->tty_intail;
if (!(ch & IN_EOF)) {
/* One character to be delivered to the user. */
*bp = ch & IN_CHAR;
tp->tty_inleft--;
if (++bp == bufend(buf)) {
/* Temp buffer full, copy to user space. */
phys_copy(buf_phys, user_base + tp->tty_in_vir,
(phys_bytes) buflen(buf));
tp->tty_in_vir += buflen(buf);
tp->tty_incum += buflen(buf);
bp = buf;
}
}
/* Remove the character from the input queue. */
if (++tp->tty_intail == bufend(tp->tty_inbuf))
tp->tty_intail = tp->tty_inbuf;
tp->tty_incount--;
if (ch & IN_EOT) {
tp->tty_eotct--;
/* Don't read past a line break in canonical mode. */
if (tp->tty_termios.c_lflag & ICANON) tp->tty_inleft = 0;
}
}
if (bp > buf) {
/* Leftover characters in the buffer. */
count = bp - buf;
phys_copy(buf_phys, user_base + tp->tty_in_vir, (phys_bytes) count);
tp->tty_in_vir += count;
tp->tty_incum += count;
}
/* Usually reply to the reader, possibly even if incum == 0 (EOF). */
if (tp->tty_inleft == 0) {
tty_reply(tp->tty_inrepcode, tp->tty_incaller, tp->tty_inproc,
tp->tty_incum);
tp->tty_inleft = tp->tty_incum = 0;
}
}
/*===========================================================================*
* in_process *
*===========================================================================*/
PUBLIC int in_process(tp, buf, count)
register tty_t *tp; /* terminal on which character has arrived */
char *buf; /* buffer with input characters */
int count; /* number of input characters */
{
/* Characters have just been typed in. Process, save, and echo them. Return
* the number of characters processed.
*/
int ch, sig, ct;
int timeset = FALSE;
static unsigned char csize_mask[] = { 0x1F, 0x3F, 0x7F, 0xFF };
for (ct = 0; ct < count; ct++) {
/* Take one character. */
ch = *buf++ & BYTE;
/* Strip to seven bits? */
if (tp->tty_termios.c_iflag & ISTRIP) ch &= 0x7F;
/* Input extensions? */
if (tp->tty_termios.c_lflag & IEXTEN) {
/* Previous character was a character escape? */
if (tp->tty_escaped) {
tp->tty_escaped = NOT_ESCAPED;
ch |= IN_ESC; /* protect character */
}
/* LNEXT (^V) to escape the next character? */
if (ch == tp->tty_termios.c_cc[VLNEXT]) {
tp->tty_escaped = ESCAPED;
rawecho(tp, '^');
rawecho(tp, '\b');
continue; /* do not store the escape */
}
/* REPRINT (^R) to reprint echoed characters? */
if (ch == tp->tty_termios.c_cc[VREPRINT]) {
reprint(tp);
continue;
}
}
/* _POSIX_VDISABLE is a normal character value, so better escape it. */
if (ch == _POSIX_VDISABLE) ch |= IN_ESC;
/* Map CR to LF, ignore CR, or map LF to CR. */
if (ch == '\r') {
if (tp->tty_termios.c_iflag & IGNCR) continue;
if (tp->tty_termios.c_iflag & ICRNL) ch = '\n';
} else
if (ch == '\n') {
if (tp->tty_termios.c_iflag & INLCR) ch = '\r';
}
/* Canonical mode? */
if (tp->tty_termios.c_lflag & ICANON) {
/* Erase processing (rub out of last character). */
if (ch == tp->tty_termios.c_cc[VERASE]) {
(void) back_over(tp);
if (!(tp->tty_termios.c_lflag & ECHOE)) {
(void) echo(tp, ch);
}
continue;
}
/* Kill processing (remove current line). */
if (ch == tp->tty_termios.c_cc[VKILL]) {
while (back_over(tp)) {}
if (!(tp->tty_termios.c_lflag & ECHOE)) {
(void) echo(tp, ch);
if (tp->tty_termios.c_lflag & ECHOK)
rawecho(tp, '\n');
}
continue;
}
/* EOF (^D) means end-of-file, an invisible "line break". */
if (ch == tp->tty_termios.c_cc[VEOF]) ch |= IN_EOT | IN_EOF;
/* The line may be returned to the user after an LF. */
if (ch == '\n') ch |= IN_EOT;
/* Same thing with EOL, whatever it may be. */
if (ch == tp->tty_termios.c_cc[VEOL]) ch |= IN_EOT;
}
/* Start/stop input control? */
if (tp->tty_termios.c_iflag & IXON) {
/* Output stops on STOP (^S). */
if (ch == tp->tty_termios.c_cc[VSTOP]) {
tp->tty_inhibited = STOPPED;
tp->tty_events = 1;
continue;
}
/* Output restarts on START (^Q) or any character if IXANY. */
if (tp->tty_inhibited) {
if (ch == tp->tty_termios.c_cc[VSTART]
|| (tp->tty_termios.c_iflag & IXANY)) {
tp->tty_inhibited = RUNNING;
tp->tty_events = 1;
if (ch == tp->tty_termios.c_cc[VSTART])
continue;
}
}
}
if (tp->tty_termios.c_lflag & ISIG) {
/* Check for INTR (^?) and QUIT (^\) characters. */
if (ch == tp->tty_termios.c_cc[VINTR]
|| ch == tp->tty_termios.c_cc[VQUIT]) {
sig = SIGINT;
if (ch == tp->tty_termios.c_cc[VQUIT]) sig = SIGQUIT;
sigchar(tp, sig);
(void) echo(tp, ch);
continue;
}
}
/* Is there space in the input buffer? */
if (tp->tty_incount == buflen(tp->tty_inbuf)) {
/* No space; discard in canonical mode, keep in raw mode. */
if (tp->tty_termios.c_lflag & ICANON) continue;
break;
}
if (!(tp->tty_termios.c_lflag & ICANON)) {
/* In raw mode all characters are "line breaks". */
ch |= IN_EOT;
/* Start an inter-byte timer? */
if (!timeset && tp->tty_termios.c_cc[VMIN] > 0
&& tp->tty_termios.c_cc[VTIME] > 0) {
lock();
settimer(tp, TRUE);
unlock();
timeset = TRUE;
}
}
/* Perform the intricate function of echoing. */
if (tp->tty_termios.c_lflag & (ECHO|ECHONL)) ch = echo(tp, ch);
/* Save the character in the input queue. */
*tp->tty_inhead++ = ch;
if (tp->tty_inhead == bufend(tp->tty_inbuf))
tp->tty_inhead = tp->tty_inbuf;
tp->tty_incount++;
if (ch & IN_EOT) tp->tty_eotct++;
/* Try to finish input if the queue threatens to overflow. */
if (tp->tty_incount == buflen(tp->tty_inbuf)) in_transfer(tp);
}
return ct;
}
/*===========================================================================*
* echo *
*===========================================================================*/
PRIVATE int echo(tp, ch)
register tty_t *tp; /* terminal on which to echo */
register int ch; /* pointer to character to echo */
{
/* Echo the character if echoing is on. Some control characters are echoed
* with their normal effect, other control characters are echoed as "^X",
* normal characters are echoed normally. EOF (^D) is echoed, but immediately
* backspaced over. Return the character with the echoed length added to its
* attributes.
*/
int len, rp;
ch &= ~IN_LEN;
if (!(tp->tty_termios.c_lflag & ECHO)) {
if (ch == ('\n' | IN_EOT) && (tp->tty_termios.c_lflag
& (ICANON|ECHONL)) == (ICANON|ECHONL))
(*tp->tty_echo)(tp, '\n');
return(ch);
}
/* "Reprint" tells if the echo output has been messed up by other output. */
rp = tp->tty_incount == 0 ? FALSE : tp->tty_reprint;
if ((ch & IN_CHAR) < ' ') {
switch (ch & (IN_ESC|IN_EOF|IN_EOT|IN_CHAR)) {
case '\t':
len = 0;
do {
(*tp->tty_echo)(tp, ' ');
len++;
} while (len < TAB_SIZE && (tp->tty_position & TAB_MASK) != 0);
break;
case '\r' | IN_EOT:
case '\n' | IN_EOT:
(*tp->tty_echo)(tp, ch & IN_CHAR);
len = 0;
break;
default:
(*tp->tty_echo)(tp, '^');
(*tp->tty_echo)(tp, '@' + (ch & IN_CHAR));
len = 2;
}
} else
if ((ch & IN_CHAR) == '\177') {
/* A DEL prints as "^?". */
(*tp->tty_echo)(tp, '^');
(*tp->tty_echo)(tp, '?');
len = 2;
} else {
(*tp->tty_echo)(tp, ch & IN_CHAR);
len = 1;
}
if (ch & IN_EOF) while (len > 0) { (*tp->tty_echo)(tp, '\b'); len--; }
tp->tty_reprint = rp;
return(ch | (len << IN_LSHIFT));
}
/*==========================================================================*
* rawecho *
*==========================================================================*/
PRIVATE void rawecho(tp, ch)
register tty_t *tp;
int ch;
{
/* Echo without interpretation if ECHO is set. */
int rp = tp->tty_reprint;
if (tp->tty_termios.c_lflag & ECHO) (*tp->tty_echo)(tp, ch);
tp->tty_reprint = rp;
}
/*==========================================================================*
* back_over *
*==========================================================================*/
PRIVATE int back_over(tp)
register tty_t *tp;
{
/* Backspace to previous character on screen and erase it. */
u16_t *head;
int len;
if (tp->tty_incount == 0) return(0); /* queue empty */
head = tp->tty_inhead;
if (head == tp->tty_inbuf) head = bufend(tp->tty_inbuf);
if (*--head & IN_EOT) return(0); /* can't erase "line breaks" */
if (tp->tty_reprint) reprint(tp); /* reprint if messed up */
tp->tty_inhead = head;
tp->tty_incount--;
if (tp->tty_termios.c_lflag & ECHOE) {
len = (*head & IN_LEN) >> IN_LSHIFT;
while (len > 0) {
rawecho(tp, '\b');
rawecho(tp, ' ');
rawecho(tp, '\b');
len--;
}
}
return(1); /* one character erased */
}
/*==========================================================================*
* reprint *
*==========================================================================*/
PRIVATE void reprint(tp)
register tty_t *tp; /* pointer to tty struct */
{
/* Restore what has been echoed to screen before if the user input has been
* messed up by output, or if REPRINT (^R) is typed.
*/
int count;
u16_t *head;
tp->tty_reprint = FALSE;
/* Find the last line break in the input. */
head = tp->tty_inhead;
count = tp->tty_incount;
while (count > 0) {
if (head == tp->tty_inbuf) head = bufend(tp->tty_inbuf);
if (head[-1] & IN_EOT) break;
head--;
count--;
}
if (count == tp->tty_incount) return; /* no reason to reprint */
/* Show REPRINT (^R) and move to a new line. */
(void) echo(tp, tp->tty_termios.c_cc[VREPRINT] | IN_ESC);
rawecho(tp, '\r');
rawecho(tp, '\n');
/* Reprint from the last break onwards. */
do {
if (head == bufend(tp->tty_inbuf)) head = tp->tty_inbuf;
*head = echo(tp, *head);
head++;
count++;
} while (count < tp->tty_incount);
}
/*==========================================================================*
* out_process *
*==========================================================================*/
PUBLIC void out_process(tp, bstart, bpos, bend, icount, ocount)
tty_t *tp;
char *bstart, *bpos, *bend; /* start/pos/end of circular buffer */
int *icount; /* # input chars / input chars used */
int *ocount; /* max output chars / output chars used */
{
/* Perform output processing on a circular buffer. *icount is the number of
* bytes to process, and the number of bytes actually processed on return.
* *ocount is the space available on input and the space used on output.
* (Naturally *icount < *ocount.) The column position is updated modulo
* the TAB size, because we really only need it for tabs.
*/
int tablen;
int ict = *icount;
int oct = *ocount;
int pos = tp->tty_position;
while (ict > 0) {
switch (*bpos) {
case '\7':
break;
case '\b':
pos--;
break;
case '\r':
pos = 0;
break;
case '\n':
if ((tp->tty_termios.c_oflag & (OPOST|ONLCR))
== (OPOST|ONLCR)) {
/* Map LF to CR+LF if there is space. Note that the
* next character in the buffer is overwritten, so
* we stop at this point.
*/
if (oct >= 2) {
*bpos = '\r';
if (++bpos == bend) bpos = bstart;
*bpos = '\n';
pos = 0;
ict--;
oct -= 2;
}
goto out_done; /* no space or buffer got changed */
}
break;
case '\t':
/* Best guess for the tab length. */
tablen = TAB_SIZE - (pos & TAB_MASK);
if ((tp->tty_termios.c_oflag & (OPOST|XTABS))
== (OPOST|XTABS)) {
/* Tabs must be expanded. */
if (oct >= tablen) {
pos += tablen;
ict--;
oct -= tablen;
do {
*bpos = ' ';
if (++bpos == bend) bpos = bstart;
} while (--tablen != 0);
}
goto out_done;
}
/* Tabs are output directly. */
pos += tablen;
break;
default:
/* Assume any other character prints as one character. */
pos++;
}
if (++bpos == bend) bpos = bstart;
ict--;
oct--;
}
out_done:
tp->tty_position = pos & TAB_MASK;
*icount -= ict; /* [io]ct are the number of chars not used */
*ocount -= oct; /* *[io]count are the number of chars that are used */
}
/*===========================================================================*
* dev_ioctl *
*===========================================================================*/
PRIVATE void dev_ioctl(tp)
tty_t *tp;
{
/* The ioctl's TCSETSW, TCSETSF and TCDRAIN wait for output to finish to make
* sure that an attribute change doesn't affect the processing of current
* output. Once output finishes the ioctl is executed as in do_ioctl().
*/
phys_bytes user_phys;
if (tp->tty_outleft > 0) return; /* output not finished */
if (tp->tty_ioreq != TCDRAIN) {
if (tp->tty_ioreq == TCSETSF) tty_icancel(tp);
user_phys = proc_vir2phys(proc_addr(tp->tty_ioproc), tp->tty_iovir);
phys_copy(user_phys, vir2phys(&tp->tty_termios),
(phys_bytes) sizeof(tp->tty_termios));
setattr(tp);
}
tp->tty_ioreq = 0;
tty_reply(REVIVE, tp->tty_iocaller, tp->tty_ioproc, OK);
}
/*===========================================================================*
* setattr *
*===========================================================================*/
PRIVATE void setattr(tp)
tty_t *tp;
{
/* Apply the new line attributes (raw/canonical, line speed, etc.) */
u16_t *inp;
int count;
if (!(tp->tty_termios.c_lflag & ICANON)) {
/* Raw mode; put a "line break" on all characters in the input queue.
* It is undefined what happens to the input queue when ICANON is
* switched off, a process should use TCSAFLUSH to flush the queue.
* Keeping the queue to preserve typeahead is the Right Thing, however
* when a process does use TCSANOW to switch to raw mode.
*/
count = tp->tty_eotct = tp->tty_incount;
inp = tp->tty_intail;
while (count > 0) {
*inp |= IN_EOT;
if (++inp == bufend(tp->tty_inbuf)) inp = tp->tty_inbuf;
--count;
}
}
/* Inspect MIN and TIME. */
lock();
settimer(tp, FALSE);
unlock();
if (tp->tty_termios.c_lflag & ICANON) {
/* No MIN & TIME in canonical mode. */
tp->tty_min = 1;
} else {
/* In raw mode MIN is the number of chars wanted, and TIME how long
* to wait for them. With interesting exceptions if either is zero.
*/
tp->tty_min = tp->tty_termios.c_cc[VMIN];
if (tp->tty_min == 0 && tp->tty_termios.c_cc[VTIME] > 0)
tp->tty_min = 1;
}
if (!(tp->tty_termios.c_iflag & IXON)) {
/* No start/stop output control, so don't leave output inhibited. */
tp->tty_inhibited = RUNNING;
tp->tty_events = 1;
}
/* Setting the output speed to zero hangs up the phone. */
if (tp->tty_termios.c_ospeed == B0) sigchar(tp, SIGHUP);
/* Set new line speed, character size, etc at the device level. */
(*tp->tty_ioctl)(tp);
}
/*===========================================================================*
* tty_reply *
*===========================================================================*/
PUBLIC void tty_reply(code, replyee, proc_nr, status)
int code; /* TASK_REPLY or REVIVE */
int replyee; /* destination address for the reply */
int proc_nr; /* to whom should the reply go? */
int status; /* reply code */
{
/* Send a reply to a process that wanted to read or write data. */
message tty_mess;
tty_mess.m_type = code;
tty_mess.REP_PROC_NR = proc_nr;
tty_mess.REP_STATUS = status;
if ((status = send(replyee, &tty_mess)) != OK)
panic("tty_reply failed, status\n", status);
}
/*===========================================================================*
* sigchar *
*===========================================================================*/
PUBLIC void sigchar(tp, sig)
register tty_t *tp;
int sig; /* SIGINT, SIGQUIT, SIGKILL or SIGHUP */
{
/* Process a SIGINT, SIGQUIT or SIGKILL char from the keyboard or SIGHUP from
* a tty close, "stty 0", or a real RS-232 hangup. MM will send the signal to
* the process group (INT, QUIT), all processes (KILL), or the session leader
* (HUP).
*/
if (tp->tty_pgrp != 0) cause_sig(tp->tty_pgrp, sig);
if (!(tp->tty_termios.c_lflag & NOFLSH)) {
tp->tty_incount = tp->tty_eotct = 0; /* kill earlier input */
tp->tty_intail = tp->tty_inhead;
(*tp->tty_ocancel)(tp); /* kill all output */
tp->tty_inhibited = RUNNING;
tp->tty_events = 1;
}
}
/*==========================================================================*
* tty_icancel *
*==========================================================================*/
PRIVATE void tty_icancel(tp)
register tty_t *tp;
{
/* Discard all pending input, tty buffer or device. */
tp->tty_incount = tp->tty_eotct = 0;
tp->tty_intail = tp->tty_inhead;
(*tp->tty_icancel)(tp);
}
/*==========================================================================*
* tty_init *
*==========================================================================*/
PRIVATE void tty_init(tp)
tty_t *tp; /* TTY line to initialize. */
{
/* Initialize tty structure and call device initialization routines. */
tp->tty_intail = tp->tty_inhead = tp->tty_inbuf;
tp->tty_min = 1;
tp->tty_termios = termios_defaults;
tp->tty_icancel = tp->tty_ocancel = tp->tty_ioctl = tp->tty_close =
tty_devnop;
if (tp < tty_addr(NR_CONS)) {
scr_init(tp);
} else
if (tp < tty_addr(NR_CONS+NR_RS_LINES)) {
rs_init(tp);
} else {
pty_init(tp);
}
}
/*==========================================================================*
* tty_wakeup *
*==========================================================================*/
PUBLIC void tty_wakeup(now)
clock_t now; /* current time */
{
/* Wake up TTY when something interesting is happening on one of the terminal
* lines, like a character arriving on an RS232 line, a key being typed, or
* a timer on a line expiring by TIME.
*/
tty_t *tp;
/* Scan the timerlist for expired timers and compute the next timeout time. */
tty_timeout = TIME_NEVER;
while ((tp = tty_timelist) != NULL) {
if (tp->tty_time > now) {
tty_timeout = tp->tty_time; /* this timer is next */
break;
}
tp->tty_min = 0; /* force read to succeed */
tp->tty_events = 1;
tty_timelist = tp->tty_timenext;
}
/* Let TTY know there is something afoot. */
interrupt(TTY);
}
/*===========================================================================*
* settimer *
*===========================================================================*/
PRIVATE void settimer(tp, on)
tty_t *tp; /* line to set or unset a timer on */
int on; /* set timer if true, otherwise unset */
{
/* Set or unset a TIME inspired timer. This function is interrupt sensitive
* due to tty_wakeup(), so it must be called from within lock()/unlock().
*/
tty_t **ptp;
/* Take tp out of the timerlist if present. */
for (ptp = &tty_timelist; *ptp != NULL; ptp = &(*ptp)->tty_timenext) {
if (tp == *ptp) {
*ptp = tp->tty_timenext; /* take tp out of the list */
break;
}
}
if (!on) return; /* unsetting it is enough */
/* Timeout occurs TIME deciseconds from now. */
tp->tty_time = get_uptime() + tp->tty_termios.c_cc[VTIME] * (HZ/10);
/* Find a new place in the list. */
for (ptp = &tty_timelist; *ptp != NULL; ptp = &(*ptp)->tty_timenext) {
if (tp->tty_time <= (*ptp)->tty_time) break;
}
tp->tty_timenext = *ptp;
*ptp = tp;
if (tp->tty_time < tty_timeout) tty_timeout = tp->tty_time;
}
/*==========================================================================*
* tty_devnop *
*==========================================================================*/
PUBLIC void tty_devnop(tp)
tty_t *tp;
{
/* Some functions need not be implemented at the device level. */
}
#if ENABLE_SRCCOMPAT || ENABLE_BINCOMPAT
/*===========================================================================*
* compat_getp *
*===========================================================================*/
PRIVATE int compat_getp(tp, sg)
tty_t *tp;
struct sgttyb *sg;
{
/* Translate an old TIOCGETP to the termios equivalent. */
int flgs;
sg->sg_erase = tp->tty_termios.c_cc[VERASE];
sg->sg_kill = tp->tty_termios.c_cc[VKILL];
sg->sg_ospeed = tspd2sgspd(cfgetospeed(&tp->tty_termios));
sg->sg_ispeed = tspd2sgspd(cfgetispeed(&tp->tty_termios));
flgs = 0;
/* XTABS - if OPOST and XTABS */
if ((tp->tty_termios.c_oflag & (OPOST|XTABS)) == (OPOST|XTABS))
flgs |= 0006000;
/* BITS5..BITS8 - map directly to CS5..CS8 */
flgs |= (tp->tty_termios.c_cflag & CSIZE) << (8-2);
/* EVENP - if PARENB and not PARODD */
if ((tp->tty_termios.c_cflag & (PARENB|PARODD)) == PARENB)
flgs |= 0000200;
/* ODDP - if PARENB and PARODD */
if ((tp->tty_termios.c_cflag & (PARENB|PARODD)) == (PARENB|PARODD))
flgs |= 0000100;
/* RAW - if not ICANON and not ISIG */
if (!(tp->tty_termios.c_lflag & (ICANON|ISIG)))
flgs |= 0000040;
/* CRMOD - if ICRNL */
if (tp->tty_termios.c_iflag & ICRNL)
flgs |= 0000020;
/* ECHO - if ECHO */
if (tp->tty_termios.c_lflag & ECHO)
flgs |= 0000010;
/* CBREAK - if not ICANON and ISIG */
if ((tp->tty_termios.c_lflag & (ICANON|ISIG)) == ISIG)
flgs |= 0000002;
sg->sg_flags = flgs;
return(OK);
}
/*===========================================================================*
* compat_getc *
*===========================================================================*/
PRIVATE int compat_getc(tp, tc)
tty_t *tp;
struct tchars *tc;
{
/* Translate an old TIOCGETC to the termios equivalent. */
tc->t_intrc = tp->tty_termios.c_cc[VINTR];
tc->t_quitc = tp->tty_termios.c_cc[VQUIT];
tc->t_startc = tp->tty_termios.c_cc[VSTART];
tc->t_stopc = tp->tty_termios.c_cc[VSTOP];
tc->t_brkc = tp->tty_termios.c_cc[VEOL];
tc->t_eofc = tp->tty_termios.c_cc[VEOF];
return(OK);
}
/*===========================================================================*
* compat_setp *
*===========================================================================*/
PRIVATE int compat_setp(tp, sg)
tty_t *tp;
struct sgttyb *sg;
{
/* Translate an old TIOCSETP to the termios equivalent. */
struct termios termios;
int flags;
termios = tp->tty_termios;
termios.c_cc[VERASE] = sg->sg_erase;
termios.c_cc[VKILL] = sg->sg_kill;
cfsetispeed(&termios, sgspd2tspd(sg->sg_ispeed & BYTE));
cfsetospeed(&termios, sgspd2tspd(sg->sg_ospeed & BYTE));
flags = sg->sg_flags;
/* Input flags */
/* BRKINT - not changed */
/* ICRNL - set if CRMOD is set and not RAW */
/* (CRMOD also controls output) */
termios.c_iflag &= ~ICRNL;
if ((flags & 0000020) && !(flags & 0000040))
termios.c_iflag |= ICRNL;
/* IGNBRK - not changed */
/* IGNCR - forced off (ignoring cr's is not supported) */
termios.c_iflag &= ~IGNCR;
/* IGNPAR - not changed */
/* INLCR - forced off (mapping nl's to cr's is not supported) */
termios.c_iflag &= ~INLCR;
/* INPCK - not changed */
/* ISTRIP - not changed */
/* IXOFF - not changed */
/* IXON - forced on if not RAW */
termios.c_iflag &= ~IXON;
if (!(flags & 0000040))
termios.c_iflag |= IXON;
/* PARMRK - not changed */
/* Output flags */
/* OPOST - forced on if not RAW */
termios.c_oflag &= ~OPOST;
if (!(flags & 0000040))
termios.c_oflag |= OPOST;
/* ONLCR - forced on if CRMOD */
termios.c_oflag &= ~ONLCR;
if (flags & 0000020)
termios.c_oflag |= ONLCR;
/* XTABS - forced on if XTABS */
termios.c_oflag &= ~XTABS;
if (flags & 0006000)
termios.c_oflag |= XTABS;
/* CLOCAL - not changed */
/* CREAD - forced on (receiver is always enabled) */
termios.c_cflag |= CREAD;
/* CSIZE - CS5-CS8 correspond directly to BITS5-BITS8 */
termios.c_cflag = (termios.c_cflag & ~CSIZE) | ((flags & 0001400) >> (8-2));
/* CSTOPB - not changed */
/* HUPCL - not changed */
/* PARENB - set if EVENP or ODDP is set */
termios.c_cflag &= ~PARENB;
if (flags & (0000200|0000100))
termios.c_cflag |= PARENB;
/* PARODD - set if ODDP is set */
termios.c_cflag &= ~PARODD;
if (flags & 0000100)
termios.c_cflag |= PARODD;
/* Local flags */
/* ECHO - set if ECHO is set */
termios.c_lflag &= ~ECHO;
if (flags & 0000010)
termios.c_lflag |= ECHO;
/* ECHOE - not changed */
/* ECHOK - not changed */
/* ECHONL - not changed */
/* ICANON - set if neither CBREAK nor RAW */
termios.c_lflag &= ~ICANON;
if (!(flags & (0000002|0000040)))
termios.c_lflag |= ICANON;
/* IEXTEN - set if not RAW */
/* ISIG - set if not RAW */
termios.c_lflag &= ~(IEXTEN|ISIG);
if (!(flags & 0000040))
termios.c_lflag |= (IEXTEN|ISIG);
/* NOFLSH - not changed */
/* TOSTOP - not changed */
tp->tty_termios = termios;
setattr(tp);
return(OK);
}
/*===========================================================================*
* compat_setc *
*===========================================================================*/
PRIVATE int compat_setc(tp, tc)
tty_t *tp;
struct tchars *tc;
{
/* Translate an old TIOCSETC to the termios equivalent. */
struct termios termios;
termios = tp->tty_termios;
termios.c_cc[VINTR] = tc->t_intrc;
termios.c_cc[VQUIT] = tc->t_quitc;
termios.c_cc[VSTART] = tc->t_startc;
termios.c_cc[VSTOP] = tc->t_stopc;
termios.c_cc[VEOL] = tc->t_brkc;
termios.c_cc[VEOF] = tc->t_eofc;
tp->tty_termios = termios;
setattr(tp);
return(OK);
}
/* Table of termios line speed to sgtty line speed translations. All termios
* speeds are present even if sgtty didn't know about them. (Now it does.)
*/
PRIVATE struct s2s {
speed_t tspd;
u8_t sgspd;
} ts2sgs[] = {
{ B0, 0 },
{ B50, 50 },
{ B75, 75 },
{ B110, 1 },
{ B134, 134 },
{ B200, 2 },
{ B300, 3 },
{ B600, 6 },
{ B1200, 12 },
{ B1800, 18 },
{ B2400, 24 },
{ B4800, 48 },
{ B9600, 96 },
{ B19200, 192 },
{ B38400, 195 },
{ B57600, 194 },
{ B115200, 193 },
};
/*===========================================================================*
* tspd2sgspd *
*===========================================================================*/
PRIVATE int tspd2sgspd(tspd)
speed_t tspd;
{
/* Translate a termios speed to sgtty speed. */
struct s2s *s;
for (s = ts2sgs; s < ts2sgs + sizeof(ts2sgs)/sizeof(ts2sgs[0]); s++) {
if (s->tspd == tspd) return(s->sgspd);
}
return 96;
}
/*===========================================================================*
* sgspd2tspd *
*===========================================================================*/
PRIVATE speed_t sgspd2tspd(sgspd)
int sgspd;
{
/* Translate a sgtty speed to termios speed. */
struct s2s *s;
for (s = ts2sgs; s < ts2sgs + sizeof(ts2sgs)/sizeof(ts2sgs[0]); s++) {
if (s->sgspd == sgspd) return(s->tspd);
}
return B9600;
}
#if ENABLE_BINCOMPAT
/*===========================================================================*
* do_ioctl_compat *
*===========================================================================*/
PRIVATE void do_ioctl_compat(tp, m_ptr)
tty_t *tp;
message *m_ptr;
{
/* Handle the old sgtty ioctl's that packed the sgtty or tchars struct into
* the Minix message. Efficient then, troublesome now.
*/
int minor, proc, func, result, r;
long flags, erki, spek;
u8_t erase, kill, intr, quit, xon, xoff, brk, eof, ispeed, ospeed;
struct sgttyb sg;
struct tchars tc;
message reply_mess;
minor = m_ptr->TTY_LINE;
proc = m_ptr->PROC_NR;
func = m_ptr->REQUEST;
spek = m_ptr->m2_l1;
flags = m_ptr->m2_l2;
switch(func)
{
case (('t'<<8) | 8): /* TIOCGETP */
r = compat_getp(tp, &sg);
erase = sg.sg_erase;
kill = sg.sg_kill;
ispeed = sg.sg_ispeed;
ospeed = sg.sg_ospeed;
flags = sg.sg_flags;
erki = ((long)ospeed<<24) | ((long)ispeed<<16) | ((long)erase<<8) |kill;
break;
case (('t'<<8) | 18): /* TIOCGETC */
r = compat_getc(tp, &tc);
intr = tc.t_intrc;
quit = tc.t_quitc;
xon = tc.t_startc;
xoff = tc.t_stopc;
brk = tc.t_brkc;
eof = tc.t_eofc;
erki = ((long)intr<<24) | ((long)quit<<16) | ((long)xon<<8) | xoff;
flags = (eof << 8) | brk;
break;
case (('t'<<8) | 17): /* TIOCSETC */
tc.t_stopc = (spek >> 0) & 0xFF;
tc.t_startc = (spek >> 8) & 0xFF;
tc.t_quitc = (spek >> 16) & 0xFF;
tc.t_intrc = (spek >> 24) & 0xFF;
tc.t_brkc = (flags >> 0) & 0xFF;
tc.t_eofc = (flags >> 8) & 0xFF;
r = compat_setc(tp, &tc);
break;
case (('t'<<8) | 9): /* TIOCSETP */
sg.sg_erase = (spek >> 8) & 0xFF;
sg.sg_kill = (spek >> 0) & 0xFF;
sg.sg_ispeed = (spek >> 16) & 0xFF;
sg.sg_ospeed = (spek >> 24) & 0xFF;
sg.sg_flags = flags;
r = compat_setp(tp, &sg);
break;
default:
r = ENOTTY;
}
reply_mess.m_type = TASK_REPLY;
reply_mess.REP_PROC_NR = m_ptr->PROC_NR;
reply_mess.REP_STATUS = r;
reply_mess.m2_l1 = erki;
reply_mess.m2_l2 = flags;
send(m_ptr->m_source, &reply_mess);
}
#endif /* ENABLE_BINCOMPAT */
#endif /* ENABLE_SRCCOMPAT || ENABLE_BINCOMPAT */