usr.bin/window/wwtty.c

   1 /*      $NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $    */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwtty.c     8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <sys/types.h>
  45 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
  46 #include <sys/ioctl.h>
  47 #endif
  48 #include <fcntl.h>
  49 #include "ww.h"
  50
  51 int
  52 wwgettty(int d, struct ww_tty *t)
  53 {
  54 #ifdef OLD_TTY
  55         if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
  56                 goto bad;
  57         if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
  58                 goto bad;
  59         if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
  60                 goto bad;
  61         if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
  62                 goto bad;
  63         if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
  64                 goto bad;
  65 #else
  66         if (tcgetattr(d, &t->ww_termios) < 0)
  67                 goto bad;
  68 #endif
  69         return 0;
  70 bad:
  71         wwerrno = WWE_SYS;
  72         return -1;
  73 }
  74
  75 /*
  76  * Set the modes of tty 'd' to 't'
  77  * 'o' is the current modes.  We set the line discipline only if
  78  * it changes, to avoid unnecessary flushing of typeahead.
  79  */
  80 int
  81 wwsettty(int d, struct ww_tty *t)
  82 {
  83 #ifdef OLD_TTY
  84         int i;
  85
  86         /* XXX, for buggy tty drivers that don't wait for output to drain */
  87         while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
  88                 usleep(100000);
  89         if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
  90                 goto bad;
  91         if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
  92                 goto bad;
  93         if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
  94                 goto bad;
  95         if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
  96                 goto bad;
  97         if (ioctl(d, TIOCGETD, (char *)&i) < 0)
  98                 goto bad;
  99         if (t->ww_ldisc != i &&
 100             ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
 101                 goto bad;
 102 #else
 103 #ifdef sun
 104         /* XXX, for buggy tty drivers that don't wait for output to drain */
 105         (void) tcdrain(d);
 106 #endif
 107         if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
 108                 goto bad;
 109 #endif
 110         return 0;
 111 bad:
 112         wwerrno = WWE_SYS;
 113         return -1;
 114 }
 115
 116 /*
 117  * The ttysize and stop-start routines must also work
 118  * on the control side of pseudoterminals.
 119  */
 120
 121 int
 122 wwgetttysize(int d, int *r, int *c)
 123 {
 124         struct winsize winsize;
 125
 126         if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
 127                 wwerrno = WWE_SYS;
 128                 return -1;
 129         }
 130         if (winsize.ws_row != 0)
 131                 *r = winsize.ws_row;
 132         if (winsize.ws_col != 0)
 133                 *c = winsize.ws_col;
 134         return 0;
 135 }
 136
 137 int
 138 wwsetttysize(int d, int r, int 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 int
 153 wwstoptty(int d)
 154 {
 155 #if !defined(OLD_TTY) && defined(TCOOFF)
 156         /* not guaranteed to work on the pty side */
 157         if (tcflow(d, TCOOFF) < 0)
 158 #else
 159         if (ioctl(d, TIOCSTOP, (char *)0) < 0)
 160 #endif
 161         {
 162                 wwerrno = WWE_SYS;
 163                 return -1;
 164         }
 165         return 0;
 166 }
 167
 168 int
 169 wwstarttty(int d)
 170 {
 171 #if !defined(OLD_TTY) && defined(TCOON)
 172         /* not guaranteed to work on the pty side */
 173         if (tcflow(d, TCOON) < 0)
 174 #else
 175         if (ioctl(d, TIOCSTART, (char *)0) < 0)
 176 #endif
 177         {
 178                 wwerrno = WWE_SYS;
 179                 return -1;
 180         }
 181         return 0;
 182 }