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 04:29:34 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 } 181