usr.bin/window/wwtty.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwtty.c  8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwtty.c,v 1.1.1.1.14.1 2001/05/17 09:45:02 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwtty.c,v 1.2 2003/06/17 06:29:34 dillon Exp $
  39  */
  40
  41 #include "ww.h"
  42 #include <sys/types.h>
  43 #include <fcntl.h>
  44 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
  45 #include <sys/ioctl.h>
  46 #endif
  47
  48 wwgettty(d, t)
  49 register struct ww_tty *t;
  50 {
  51 #ifdef OLD_TTY
  52         if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
  53                 goto bad;
  54         if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
  55                 goto bad;
  56         if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
  57                 goto bad;
  58         if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
  59                 goto bad;
  60         if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
  61                 goto bad;
  62 #else
  63         if (tcgetattr(d, &t->ww_termios) < 0)
  64                 goto bad;
  65 #endif
  66         if ((t->ww_fflags = fcntl(d, F_GETFL, 0)) < 0)
  67                 goto bad;
  68         return 0;
  69 bad:
  70         wwerrno = WWE_SYS;
  71         return -1;
  72 }
  73
  74 /*
  75  * Set the modes of tty 'd' to 't'
  76  * 'o' is the current modes.  We set the line discipline only if
  77  * it changes, to avoid unnecessary flushing of typeahead.
  78  */
  79 wwsettty(d, t)
  80 register struct ww_tty *t;
  81 {
  82 #ifdef OLD_TTY
  83         int i;
  84
  85         /* XXX, for buggy tty drivers that don't wait for output to drain */
  86         while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
  87                 usleep(100000);
  88         if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
  89                 goto bad;
  90         if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
  91                 goto bad;
  92         if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
  93                 goto bad;
  94         if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
  95                 goto bad;
  96         if (ioctl(d, TIOCGETD, (char *)&i) < 0)
  97                 goto bad;
  98         if (t->ww_ldisc != i &&
  99             ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
 100                 goto bad;
 101 #else
 102 #ifdef sun
 103         /* XXX, for buggy tty drivers that don't wait for output to drain */
 104         (void) tcdrain(d);
 105 #endif
 106         if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
 107                 goto bad;
 108 #endif
 109         if (fcntl(d, F_SETFL, t->ww_fflags) < 0)
 110                 goto bad;
 111         return 0;
 112 bad:
 113         wwerrno = WWE_SYS;
 114         return -1;
 115 }
 116
 117 /*
 118  * The ttysize and stop-start routines must also work
 119  * on the control side of pseudoterminals.
 120  */
 121
 122 wwgetttysize(d, r, c)
 123         int *r, *c;
 124 {
 125         struct winsize winsize;
 126
 127         if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
 128                 wwerrno = WWE_SYS;
 129                 return -1;
 130         }
 131         if (winsize.ws_row != 0)
 132                 *r = winsize.ws_row;
 133         if (winsize.ws_col != 0)
 134                 *c = winsize.ws_col;
 135         return 0;
 136 }
 137
 138 wwsetttysize(d, r, c)
 139 {
 140         struct winsize winsize;
 141
 142         winsize.ws_row = r;
 143         winsize.ws_col = c;
 144         winsize.ws_xpixel = winsize.ws_ypixel = 0;
 145         if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
 146                 wwerrno = WWE_SYS;
 147                 return -1;
 148         }
 149         return 0;
 150 }
 151
 152 wwstoptty(d)
 153 {
 154 #if !defined(OLD_TTY) && defined(TCOOFF)
 155         /* not guaranteed to work on the pty side */
 156         if (tcflow(d, TCOOFF) < 0)
 157 #else
 158         if (ioctl(d, TIOCSTOP, (char *)0) < 0)
 159 #endif
 160         {
 161                 wwerrno = WWE_SYS;
 162                 return -1;
 163         }
 164         return 0;
 165 }
 166
 167 wwstarttty(d)
 168 {
 169 #if !defined(OLD_TTY) && defined(TCOON)
 170         /* not guaranteed to work on the pty side */
 171         if (tcflow(d, TCOON) < 0)
 172 #else
 173         if (ioctl(d, TIOCSTART, (char *)0) < 0)
 174 #endif
 175         {
 176                 wwerrno = WWE_SYS;
 177                 return -1;
 178         }
 179         return 0;
 180 }