usr.bin/window/wwtty.c

   1 /*      @(#)wwtty.c     8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: wwtty.c,v 1.7 2003/08/07 11:17:46 agc Exp $    */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/types.h>
  37 #if !defined(OLD_TTY) && !defined(TIOCGWINSZ)
  38 #include <sys/ioctl.h>
  39 #endif
  40 #include <fcntl.h>
  41 #include "ww.h"
  42
  43 int
  44 wwgettty(int d, struct ww_tty *t)
  45 {
  46 #ifdef OLD_TTY
  47         if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
  48                 goto bad;
  49         if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
  50                 goto bad;
  51         if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
  52                 goto bad;
  53         if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
  54                 goto bad;
  55         if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
  56                 goto bad;
  57 #else
  58         if (tcgetattr(d, &t->ww_termios) < 0)
  59                 goto bad;
  60 #endif
  61         return 0;
  62 bad:
  63         wwerrno = WWE_SYS;
  64         return -1;
  65 }
  66
  67 /*
  68  * Set the modes of tty 'd' to 't'
  69  * 'o' is the current modes.  We set the line discipline only if
  70  * it changes, to avoid unnecessary flushing of typeahead.
  71  */
  72 int
  73 wwsettty(int d, struct ww_tty *t)
  74 {
  75 #ifdef OLD_TTY
  76         int i;
  77
  78         /* XXX, for buggy tty drivers that don't wait for output to drain */
  79         while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
  80                 usleep(100000);
  81         if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
  82                 goto bad;
  83         if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
  84                 goto bad;
  85         if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
  86                 goto bad;
  87         if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
  88                 goto bad;
  89         if (ioctl(d, TIOCGETD, (char *)&i) < 0)
  90                 goto bad;
  91         if (t->ww_ldisc != i &&
  92             ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
  93                 goto bad;
  94 #else
  95 #ifdef sun
  96         /* XXX, for buggy tty drivers that don't wait for output to drain */
  97         (void) tcdrain(d);
  98 #endif
  99         if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
 100                 goto bad;
 101 #endif
 102         return 0;
 103 bad:
 104         wwerrno = WWE_SYS;
 105         return -1;
 106 }
 107
 108 /*
 109  * The ttysize and stop-start routines must also work
 110  * on the control side of pseudoterminals.
 111  */
 112
 113 int
 114 wwgetttysize(int d, int *r, int *c)
 115 {
 116         struct winsize winsize;
 117
 118         if (ioctl(d, TIOCGWINSZ, (char *)&winsize) < 0) {
 119                 wwerrno = WWE_SYS;
 120                 return -1;
 121         }
 122         if (winsize.ws_row != 0)
 123                 *r = winsize.ws_row;
 124         if (winsize.ws_col != 0)
 125                 *c = winsize.ws_col;
 126         return 0;
 127 }
 128
 129 int
 130 wwsetttysize(int d, int r, int c)
 131 {
 132         struct winsize winsize;
 133
 134         winsize.ws_row = r;
 135         winsize.ws_col = c;
 136         winsize.ws_xpixel = winsize.ws_ypixel = 0;
 137         if (ioctl(d, TIOCSWINSZ, (char *)&winsize) < 0) {
 138                 wwerrno = WWE_SYS;
 139                 return -1;
 140         }
 141         return 0;
 142 }
 143
 144 int
 145 wwstoptty(int d)
 146 {
 147 #if !defined(OLD_TTY) && defined(TCOOFF)
 148         /* not guaranteed to work on the pty side */
 149         if (tcflow(d, TCOOFF) < 0)
 150 #else
 151         if (ioctl(d, TIOCSTOP, (char *)0) < 0)
 152 #endif
 153         {
 154                 wwerrno = WWE_SYS;
 155                 return -1;
 156         }
 157         return 0;
 158 }
 159
 160 int
 161 wwstarttty(int d)
 162 {
 163 #if !defined(OLD_TTY) && defined(TCOON)
 164         /* not guaranteed to work on the pty side */
 165         if (tcflow(d, TCOON) < 0)
 166 #else
 167         if (ioctl(d, TIOCSTART, (char *)0) < 0)
 168 #endif
 169         {
 170                 wwerrno = WWE_SYS;
 171                 return -1;
 172         }
 173         return 0;
 174 }