subr_terminal.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2009 The FreeBSD Foundation
    5  * All rights reserved.
    6  *
    7  * This software was developed by Ed Schouten under sponsorship from the
    8  * FreeBSD Foundation.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include <sys/param.h>
   36 #include <sys/cons.h>
   37 #include <sys/consio.h>
   38 #include <sys/kernel.h>
   39 #include <sys/lock.h>
   40 #include <sys/malloc.h>
   41 #include <sys/mutex.h>
   42 #include <sys/systm.h>
   43 #include <sys/terminal.h>
   44 #include <sys/tty.h>
   45 
   46 #include <machine/stdarg.h>
   47 
   48 static MALLOC_DEFINE(M_TERMINAL, "terminal", "terminal device");
   49 
   50 /*
   51  * Locking.
   52  *
   53  * Normally we don't need to lock down the terminal emulator, because
   54  * the TTY lock is already held when calling teken_input().
   55  * Unfortunately this is not the case when the terminal acts as a
   56  * console device, because cnputc() can be called at the same time.
   57  * This means terminals may need to be locked down using a spin lock.
   58  */
   59 #define TERMINAL_LOCK(tm)       do {                                    \
   60         if ((tm)->tm_flags & TF_CONS)                                   \
   61                 mtx_lock_spin(&(tm)->tm_mtx);                           \
   62         else if ((tm)->tm_tty != NULL)                                  \
   63                 tty_lock((tm)->tm_tty);                                 \
   64 } while (0)
   65 #define TERMINAL_UNLOCK(tm)     do {                                    \
   66         if ((tm)->tm_flags & TF_CONS)                                   \
   67                 mtx_unlock_spin(&(tm)->tm_mtx);                         \
   68         else if ((tm)->tm_tty != NULL)                                  \
   69                 tty_unlock((tm)->tm_tty);                               \
   70 } while (0)
   71 #define TERMINAL_LOCK_TTY(tm)   do {                                    \
   72         if ((tm)->tm_flags & TF_CONS)                                   \
   73                 mtx_lock_spin(&(tm)->tm_mtx);                           \
   74 } while (0)
   75 #define TERMINAL_UNLOCK_TTY(tm) do {                                    \
   76         if ((tm)->tm_flags & TF_CONS)                                   \
   77                 mtx_unlock_spin(&(tm)->tm_mtx);                         \
   78 } while (0)
   79 #define TERMINAL_LOCK_CONS(tm)          mtx_lock_spin(&(tm)->tm_mtx)
   80 #define TERMINAL_UNLOCK_CONS(tm)        mtx_unlock_spin(&(tm)->tm_mtx)
   81 
   82 /*
   83  * TTY routines.
   84  */
   85 
   86 static tsw_open_t       termtty_open;
   87 static tsw_close_t      termtty_close;
   88 static tsw_outwakeup_t  termtty_outwakeup;
   89 static tsw_ioctl_t      termtty_ioctl;
   90 static tsw_mmap_t       termtty_mmap;
   91 
   92 static struct ttydevsw terminal_tty_class = {
   93         .tsw_open       = termtty_open,
   94         .tsw_close      = termtty_close,
   95         .tsw_outwakeup  = termtty_outwakeup,
   96         .tsw_ioctl      = termtty_ioctl,
   97         .tsw_mmap       = termtty_mmap,
   98 };
   99 
  100 /*
  101  * Terminal emulator routines.
  102  */
  103 
  104 static tf_bell_t        termteken_bell;
  105 static tf_cursor_t      termteken_cursor;
  106 static tf_putchar_t     termteken_putchar;
  107 static tf_fill_t        termteken_fill;
  108 static tf_copy_t        termteken_copy;
  109 static tf_pre_input_t   termteken_pre_input;
  110 static tf_post_input_t  termteken_post_input;
  111 static tf_param_t       termteken_param;
  112 static tf_respond_t     termteken_respond;
  113 
  114 static teken_funcs_t terminal_drawmethods = {
  115         .tf_bell        = termteken_bell,
  116         .tf_cursor      = termteken_cursor,
  117         .tf_putchar     = termteken_putchar,
  118         .tf_fill        = termteken_fill,
  119         .tf_copy        = termteken_copy,
  120         .tf_pre_input   = termteken_pre_input,
  121         .tf_post_input  = termteken_post_input,
  122         .tf_param       = termteken_param,
  123         .tf_respond     = termteken_respond,
  124 };
  125 
  126 /* Kernel message formatting. */
  127 static teken_attr_t kernel_message = {
  128         .ta_fgcolor     = TCHAR_FGCOLOR(TERMINAL_KERN_ATTR),
  129         .ta_bgcolor     = TCHAR_BGCOLOR(TERMINAL_KERN_ATTR),
  130         .ta_format      = TCHAR_FORMAT(TERMINAL_KERN_ATTR)
  131 };
  132 
  133 static teken_attr_t default_message = {
  134         .ta_fgcolor     = TCHAR_FGCOLOR(TERMINAL_NORM_ATTR),
  135         .ta_bgcolor     = TCHAR_BGCOLOR(TERMINAL_NORM_ATTR),
  136         .ta_format      = TCHAR_FORMAT(TERMINAL_NORM_ATTR)
  137 };
  138 
  139 /* Fudge fg brightness as TF_BOLD (shifted). */
  140 #define TCOLOR_FG_FUDGED(color) __extension__ ({                        \
  141         teken_color_t _c;                                               \
  142                                                                         \
  143         _c = (color);                                                   \
  144         TCOLOR_FG(_c & 7) | ((_c & 8) << 18);                           \
  145 })
  146 
  147 /* Fudge bg brightness as TF_BLINK (shifted). */
  148 #define TCOLOR_BG_FUDGED(color) __extension__ ({                        \
  149         teken_color_t _c;                                               \
  150                                                                         \
  151         _c = (color);                                                   \
  152         TCOLOR_BG(_c & 7) | ((_c & 8) << 20);                           \
  153 })
  154 
  155 #define TCOLOR_256TO16(color) __extension__ ({                          \
  156         teken_color_t _c;                                               \
  157                                                                         \
  158         _c = (color);                                                   \
  159         if (_c >= 16)                                                   \
  160                 _c = teken_256to16(_c);                                 \
  161         _c;                                                             \
  162 })
  163 
  164 #define TCHAR_CREATE(c, a)      ((c) | TFORMAT((a)->ta_format) |        \
  165         TCOLOR_FG_FUDGED(TCOLOR_256TO16((a)->ta_fgcolor)) |             \
  166         TCOLOR_BG_FUDGED(TCOLOR_256TO16((a)->ta_bgcolor)))
  167 
  168 static void
  169 terminal_init(struct terminal *tm)
  170 {
  171         int fg, bg;
  172 
  173         if (tm->tm_flags & TF_CONS)
  174                 mtx_init(&tm->tm_mtx, "trmlck", NULL, MTX_SPIN);
  175 
  176         teken_init(&tm->tm_emulator, &terminal_drawmethods, tm);
  177 
  178         fg = bg = -1;
  179         TUNABLE_INT_FETCH("teken.fg_color", &fg);
  180         TUNABLE_INT_FETCH("teken.bg_color", &bg);
  181 
  182         if (fg != -1) {
  183                 default_message.ta_fgcolor = fg;
  184                 kernel_message.ta_fgcolor = fg;
  185         }
  186         if (bg != -1) {
  187                 default_message.ta_bgcolor = bg;
  188                 kernel_message.ta_bgcolor = bg;
  189         }
  190 
  191         if (default_message.ta_bgcolor == TC_WHITE) {
  192                 default_message.ta_bgcolor |= TC_LIGHT;
  193                 kernel_message.ta_bgcolor |= TC_LIGHT;
  194         }
  195 
  196         if (default_message.ta_bgcolor == TC_BLACK &&
  197             default_message.ta_fgcolor < TC_NCOLORS)
  198                 kernel_message.ta_fgcolor |= TC_LIGHT;
  199         teken_set_defattr(&tm->tm_emulator, &default_message);
  200 }
  201 
  202 struct terminal *
  203 terminal_alloc(const struct terminal_class *tc, void *softc)
  204 {
  205         struct terminal *tm;
  206 
  207         tm = malloc(sizeof(struct terminal), M_TERMINAL, M_WAITOK|M_ZERO);
  208         terminal_init(tm);
  209 
  210         tm->tm_class = tc;
  211         tm->tm_softc = softc;
  212 
  213         return (tm);
  214 }
  215 
  216 static void
  217 terminal_sync_ttysize(struct terminal *tm)
  218 {
  219         struct tty *tp;
  220 
  221         tp = tm->tm_tty;
  222         if (tp == NULL)
  223                 return;
  224 
  225         tty_lock(tp);
  226         tty_set_winsize(tp, &tm->tm_winsize);
  227         tty_unlock(tp);
  228 }
  229 
  230 void
  231 terminal_maketty(struct terminal *tm, const char *fmt, ...)
  232 {
  233         struct tty *tp;
  234         char name[8];
  235         va_list ap;
  236 
  237         va_start(ap, fmt);
  238         vsnrprintf(name, sizeof name, 32, fmt, ap);
  239         va_end(ap);
  240 
  241         tp = tty_alloc(&terminal_tty_class, tm);
  242         tty_makedev(tp, NULL, "%s", name);
  243         tm->tm_tty = tp;
  244         terminal_sync_ttysize(tm);
  245 }
  246 
  247 void
  248 terminal_set_cursor(struct terminal *tm, const term_pos_t *pos)
  249 {
  250 
  251         teken_set_cursor(&tm->tm_emulator, pos);
  252 }
  253 
  254 void
  255 terminal_set_winsize_blank(struct terminal *tm, const struct winsize *size,
  256     int blank, const term_attr_t *attr)
  257 {
  258         term_rect_t r;
  259 
  260         tm->tm_winsize = *size;
  261 
  262         r.tr_begin.tp_row = r.tr_begin.tp_col = 0;
  263         r.tr_end.tp_row = size->ws_row;
  264         r.tr_end.tp_col = size->ws_col;
  265 
  266         TERMINAL_LOCK(tm);
  267         if (blank == 0)
  268                 teken_set_winsize_noreset(&tm->tm_emulator, &r.tr_end);
  269         else
  270                 teken_set_winsize(&tm->tm_emulator, &r.tr_end);
  271         TERMINAL_UNLOCK(tm);
  272 
  273         if ((blank != 0) && !(tm->tm_flags & TF_MUTE))
  274                 tm->tm_class->tc_fill(tm, &r,
  275                     TCHAR_CREATE((teken_char_t)' ', attr));
  276 
  277         terminal_sync_ttysize(tm);
  278 }
  279 
  280 void
  281 terminal_set_winsize(struct terminal *tm, const struct winsize *size)
  282 {
  283 
  284         terminal_set_winsize_blank(tm, size, 1,
  285             (const term_attr_t *)&default_message);
  286 }
  287 
  288 /*
  289  * XXX: This function is a kludge.  Drivers like vt(4) need to
  290  * temporarily stop input when resizing, etc.  This should ideally be
  291  * handled within the driver.
  292  */
  293 
  294 void
  295 terminal_mute(struct terminal *tm, int yes)
  296 {
  297 
  298         TERMINAL_LOCK(tm);
  299         if (yes)
  300                 tm->tm_flags |= TF_MUTE;
  301         else
  302                 tm->tm_flags &= ~TF_MUTE;
  303         TERMINAL_UNLOCK(tm);
  304 }
  305 
  306 void
  307 terminal_input_char(struct terminal *tm, term_char_t c)
  308 {
  309         struct tty *tp;
  310 
  311         tp = tm->tm_tty;
  312         if (tp == NULL)
  313                 return;
  314 
  315         /*
  316          * Strip off any attributes. Also ignore input of second part of
  317          * CJK fullwidth characters, as we don't want to return these
  318          * characters twice.
  319          */
  320         if (TCHAR_FORMAT(c) & TF_CJK_RIGHT)
  321                 return;
  322         c = TCHAR_CHARACTER(c);
  323 
  324         tty_lock(tp);
  325         /*
  326          * Conversion to UTF-8.
  327          */
  328         if (c < 0x80) {
  329                 ttydisc_rint(tp, c, 0);
  330         } else if (c < 0x800) {
  331                 char str[2] = {
  332                         0xc0 | (c >> 6),
  333                         0x80 | (c & 0x3f)
  334                 };
  335 
  336                 ttydisc_rint_simple(tp, str, sizeof str);
  337         } else if (c < 0x10000) {
  338                 char str[3] = {
  339                         0xe0 | (c >> 12),
  340                         0x80 | ((c >> 6) & 0x3f),
  341                         0x80 | (c & 0x3f)
  342                 };
  343 
  344                 ttydisc_rint_simple(tp, str, sizeof str);
  345         } else {
  346                 char str[4] = {
  347                         0xf0 | (c >> 18),
  348                         0x80 | ((c >> 12) & 0x3f),
  349                         0x80 | ((c >> 6) & 0x3f),
  350                         0x80 | (c & 0x3f)
  351                 };
  352 
  353                 ttydisc_rint_simple(tp, str, sizeof str);
  354         }
  355         ttydisc_rint_done(tp);
  356         tty_unlock(tp);
  357 }
  358 
  359 void
  360 terminal_input_raw(struct terminal *tm, char c)
  361 {
  362         struct tty *tp;
  363 
  364         tp = tm->tm_tty;
  365         if (tp == NULL)
  366                 return;
  367 
  368         tty_lock(tp);
  369         ttydisc_rint(tp, c, 0);
  370         ttydisc_rint_done(tp);
  371         tty_unlock(tp);
  372 }
  373 
  374 void
  375 terminal_input_special(struct terminal *tm, unsigned int k)
  376 {
  377         struct tty *tp;
  378         const char *str;
  379 
  380         tp = tm->tm_tty;
  381         if (tp == NULL)
  382                 return;
  383 
  384         str = teken_get_sequence(&tm->tm_emulator, k);
  385         if (str == NULL)
  386                 return;
  387 
  388         tty_lock(tp);
  389         ttydisc_rint_simple(tp, str, strlen(str));
  390         ttydisc_rint_done(tp);
  391         tty_unlock(tp);
  392 }
  393 
  394 /*
  395  * Binding with the TTY layer.
  396  */
  397 
  398 static int
  399 termtty_open(struct tty *tp)
  400 {
  401         struct terminal *tm = tty_softc(tp);
  402 
  403         tm->tm_class->tc_opened(tm, 1);
  404         return (0);
  405 }
  406 
  407 static void
  408 termtty_close(struct tty *tp)
  409 {
  410         struct terminal *tm = tty_softc(tp);
  411 
  412         tm->tm_class->tc_opened(tm, 0);
  413 }
  414 
  415 static void
  416 termtty_outwakeup(struct tty *tp)
  417 {
  418         struct terminal *tm = tty_softc(tp);
  419         char obuf[128];
  420         size_t olen;
  421         unsigned int flags = 0;
  422 
  423         while ((olen = ttydisc_getc(tp, obuf, sizeof obuf)) > 0) {
  424                 TERMINAL_LOCK_TTY(tm);
  425                 if (!(tm->tm_flags & TF_MUTE)) {
  426                         tm->tm_flags &= ~TF_BELL;
  427                         teken_input(&tm->tm_emulator, obuf, olen);
  428                         flags |= tm->tm_flags;
  429                 }
  430                 TERMINAL_UNLOCK_TTY(tm);
  431         }
  432 
  433         TERMINAL_LOCK_TTY(tm);
  434         if (!(tm->tm_flags & TF_MUTE))
  435                 tm->tm_class->tc_done(tm);
  436         TERMINAL_UNLOCK_TTY(tm);
  437         if (flags & TF_BELL)
  438                 tm->tm_class->tc_bell(tm);
  439 }
  440 
  441 static int
  442 termtty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
  443 {
  444         struct terminal *tm = tty_softc(tp);
  445         int error;
  446 
  447         switch (cmd) {
  448         case CONS_GETINFO: {
  449                 vid_info_t *vi = (vid_info_t *)data;
  450                 const teken_pos_t *p;
  451                 int fg, bg;
  452 
  453                 if (vi->size != sizeof(vid_info_t))
  454                         return (EINVAL);
  455 
  456                 /* Already help the console driver by filling in some data. */
  457                 p = teken_get_cursor(&tm->tm_emulator);
  458                 vi->mv_row = p->tp_row;
  459                 vi->mv_col = p->tp_col;
  460 
  461                 p = teken_get_winsize(&tm->tm_emulator);
  462                 vi->mv_rsz = p->tp_row;
  463                 vi->mv_csz = p->tp_col;
  464 
  465                 teken_get_defattr_cons25(&tm->tm_emulator, &fg, &bg);
  466                 vi->mv_norm.fore = fg;
  467                 vi->mv_norm.back = bg;
  468                 /* XXX: keep vidcontrol happy; bold backgrounds. */
  469                 vi->mv_rev.fore = bg;
  470                 vi->mv_rev.back = fg & 0x7;
  471                 break;
  472         }
  473         }
  474 
  475         /*
  476          * Unlike various other drivers, this driver will never
  477          * deallocate TTYs.  This means it's safe to temporarily unlock
  478          * the TTY when handling ioctls.
  479          */
  480         tty_unlock(tp);
  481         error = tm->tm_class->tc_ioctl(tm, cmd, data, td);
  482         tty_lock(tp);
  483         if ((error == 0) && (cmd == CONS_CLRHIST)) {
  484                 /*
  485                  * Scrollback history has been successfully cleared,
  486                  * so reset the cursor position to the top left of the screen.
  487                  */
  488                 teken_pos_t p;
  489                 p.tp_row = 0;
  490                 p.tp_col = 0;
  491                 teken_set_cursor(&tm->tm_emulator, &p);
  492         }
  493         return (error);
  494 }
  495 
  496 static int
  497 termtty_mmap(struct tty *tp, vm_ooffset_t offset, vm_paddr_t * paddr,
  498     int nprot, vm_memattr_t *memattr)
  499 {
  500         struct terminal *tm = tty_softc(tp);
  501 
  502         return (tm->tm_class->tc_mmap(tm, offset, paddr, nprot, memattr));
  503 }
  504 
  505 /*
  506  * Binding with the kernel and debug console.
  507  */
  508 
  509 static cn_probe_t       termcn_cnprobe;
  510 static cn_init_t        termcn_cninit;
  511 static cn_term_t        termcn_cnterm;
  512 static cn_getc_t        termcn_cngetc;
  513 static cn_putc_t        termcn_cnputc;
  514 static cn_grab_t        termcn_cngrab;
  515 static cn_ungrab_t      termcn_cnungrab;
  516 
  517 const struct consdev_ops termcn_cnops = {
  518         .cn_probe       = termcn_cnprobe,
  519         .cn_init        = termcn_cninit,
  520         .cn_term        = termcn_cnterm,
  521         .cn_getc        = termcn_cngetc,
  522         .cn_putc        = termcn_cnputc,
  523         .cn_grab        = termcn_cngrab,
  524         .cn_ungrab      = termcn_cnungrab,
  525 };
  526 
  527 void
  528 termcn_cnregister(struct terminal *tm)
  529 {
  530         struct consdev *cp;
  531 
  532         cp = tm->consdev;
  533         if (cp == NULL) {
  534                 cp = malloc(sizeof(struct consdev), M_TERMINAL,
  535                     M_WAITOK|M_ZERO);
  536                 cp->cn_ops = &termcn_cnops;
  537                 cp->cn_arg = tm;
  538                 cp->cn_pri = CN_INTERNAL;
  539                 sprintf(cp->cn_name, "ttyv0");
  540 
  541                 tm->tm_flags = TF_CONS;
  542                 tm->consdev = cp;
  543 
  544                 terminal_init(tm);
  545         }
  546 
  547         /* Attach terminal as console. */
  548         cnadd(cp);
  549 }
  550 
  551 static void
  552 termcn_cngrab(struct consdev *cp)
  553 {
  554         struct terminal *tm = cp->cn_arg;
  555 
  556         tm->tm_class->tc_cngrab(tm);
  557 }
  558 
  559 static void
  560 termcn_cnungrab(struct consdev *cp)
  561 {
  562         struct terminal *tm = cp->cn_arg;
  563 
  564         tm->tm_class->tc_cnungrab(tm);
  565 }
  566 
  567 static void
  568 termcn_cnprobe(struct consdev *cp)
  569 {
  570         struct terminal *tm = cp->cn_arg;
  571 
  572         if (tm == NULL) {
  573                 cp->cn_pri = CN_DEAD;
  574                 return;
  575         }
  576 
  577         tm->consdev = cp;
  578         terminal_init(tm);
  579 
  580         tm->tm_class->tc_cnprobe(tm, cp);
  581 }
  582 
  583 static void
  584 termcn_cninit(struct consdev *cp)
  585 {
  586 
  587 }
  588 
  589 static void
  590 termcn_cnterm(struct consdev *cp)
  591 {
  592 
  593 }
  594 
  595 static int
  596 termcn_cngetc(struct consdev *cp)
  597 {
  598         struct terminal *tm = cp->cn_arg;
  599 
  600         return (tm->tm_class->tc_cngetc(tm));
  601 }
  602 
  603 static void
  604 termcn_cnputc(struct consdev *cp, int c)
  605 {
  606         struct terminal *tm = cp->cn_arg;
  607         teken_attr_t backup;
  608         char cv = c;
  609 
  610         TERMINAL_LOCK_CONS(tm);
  611         if (!(tm->tm_flags & TF_MUTE)) {
  612                 backup = *teken_get_curattr(&tm->tm_emulator);
  613                 teken_set_curattr(&tm->tm_emulator, &kernel_message);
  614                 teken_input(&tm->tm_emulator, &cv, 1);
  615                 teken_set_curattr(&tm->tm_emulator, &backup);
  616                 tm->tm_class->tc_done(tm);
  617         }
  618         TERMINAL_UNLOCK_CONS(tm);
  619 }
  620 
  621 /*
  622  * Binding with the terminal emulator.
  623  */
  624 
  625 static void
  626 termteken_bell(void *softc)
  627 {
  628         struct terminal *tm = softc;
  629 
  630         tm->tm_flags |= TF_BELL;
  631 }
  632 
  633 static void
  634 termteken_cursor(void *softc, const teken_pos_t *p)
  635 {
  636         struct terminal *tm = softc;
  637 
  638         tm->tm_class->tc_cursor(tm, p);
  639 }
  640 
  641 static void
  642 termteken_putchar(void *softc, const teken_pos_t *p, teken_char_t c,
  643     const teken_attr_t *a)
  644 {
  645         struct terminal *tm = softc;
  646 
  647         tm->tm_class->tc_putchar(tm, p, TCHAR_CREATE(c, a));
  648 }
  649 
  650 static void
  651 termteken_fill(void *softc, const teken_rect_t *r, teken_char_t c,
  652     const teken_attr_t *a)
  653 {
  654         struct terminal *tm = softc;
  655 
  656         tm->tm_class->tc_fill(tm, r, TCHAR_CREATE(c, a));
  657 }
  658 
  659 static void
  660 termteken_copy(void *softc, const teken_rect_t *r, const teken_pos_t *p)
  661 {
  662         struct terminal *tm = softc;
  663 
  664         tm->tm_class->tc_copy(tm, r, p);
  665 }
  666 
  667 static void
  668 termteken_pre_input(void *softc)
  669 {
  670         struct terminal *tm = softc;
  671 
  672         tm->tm_class->tc_pre_input(tm);
  673 }
  674 
  675 static void
  676 termteken_post_input(void *softc)
  677 {
  678         struct terminal *tm = softc;
  679 
  680         tm->tm_class->tc_post_input(tm);
  681 }
  682 
  683 static void
  684 termteken_param(void *softc, int cmd, unsigned int arg)
  685 {
  686         struct terminal *tm = softc;
  687 
  688         tm->tm_class->tc_param(tm, cmd, arg);
  689 }
  690 
  691 static void
  692 termteken_respond(void *softc, const void *buf, size_t len)
  693 {
  694 #if 0
  695         struct terminal *tm = softc;
  696         struct tty *tp;
  697 
  698         /*
  699          * Only inject a response into the TTY if the data actually
  700          * originated from the TTY.
  701          *
  702          * XXX: This cannot be done right now.  The TTY could pick up
  703          * other locks.  It could also in theory cause loops, when the
  704          * TTY performs echoing of a command that generates even more
  705          * input.
  706          */
  707         tp = tm->tm_tty;
  708         if (tp == NULL)
  709                 return;
  710 
  711         ttydisc_rint_simple(tp, buf, len);
  712         ttydisc_rint_done(tp);
  713 #endif
  714 }
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FreeBSD/Linux Kernel Cross Reference sys/kern/subr_terminal.c

FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_terminal.c
