gen/termios.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1989, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  */
  54
  55
  56 #include <sys/types.h>
  57 #include <sys/ioctl.h>
  58 #include <sys/tty.h>
  59 #include <sys/time.h>
  60 #define KERNEL                  /* XXX - FREAD and FWRITE ifdef'd KERNEL*/
  61 #include <sys/fcntl.h>
  62 #undef KERNEL
  63
  64 #include <errno.h>
  65 #include <stdio.h>
  66 #include <termios.h>
  67 #include <unistd.h>
  68
  69 int
  70 tcgetattr(fd, t)
  71         int fd;
  72         struct termios *t;
  73 {
  74
  75         return (ioctl(fd, TIOCGETA, t));
  76 }
  77
  78 int
  79 tcsetattr(fd, opt, t)
  80         int fd, opt;
  81         const struct termios *t;
  82 {
  83         struct termios localterm;
  84
  85         if (opt & TCSASOFT) {
  86                 localterm = *t;
  87                 localterm.c_cflag |= CIGNORE;
  88                 t = &localterm;
  89         }
  90         switch (opt & ~TCSASOFT) {
  91         case TCSANOW:
  92                 return (ioctl(fd, TIOCSETA, t));
  93         case TCSADRAIN:
  94                 return (ioctl(fd, TIOCSETAW, t));
  95         case TCSAFLUSH:
  96                 return (ioctl(fd, TIOCSETAF, t));
  97         default:
  98                 errno = EINVAL;
  99                 return (-1);
 100         }
 101 }
 102
 103 int
 104 #if __STDC__
 105 tcsetpgrp(int fd, pid_t pgrp)
 106 #else
 107 tcsetpgrp(fd, pgrp)
 108         int fd;
 109         pid_t pgrp;
 110 #endif
 111 {
 112         int s;
 113
 114         s = pgrp;
 115         return (ioctl(fd, TIOCSPGRP, &s));
 116 }
 117
 118 pid_t
 119 tcgetpgrp(fd)
 120 {
 121         int s;
 122
 123         if (ioctl(fd, TIOCGPGRP, &s) < 0)
 124                 return ((pid_t)-1);
 125
 126         return ((pid_t)s);
 127 }
 128
 129 speed_t
 130 cfgetospeed(t)
 131         const struct termios *t;
 132 {
 133
 134         return (t->c_ospeed);
 135 }
 136
 137 speed_t
 138 cfgetispeed(t)
 139         const struct termios *t;
 140 {
 141
 142         return (t->c_ispeed);
 143 }
 144
 145 int
 146 cfsetospeed(t, speed)
 147         struct termios *t;
 148         speed_t speed;
 149 {
 150
 151         t->c_ospeed = speed;
 152         return (0);
 153 }
 154
 155 int
 156 cfsetispeed(t, speed)
 157         struct termios *t;
 158         speed_t speed;
 159 {
 160
 161         t->c_ispeed = speed;
 162         return (0);
 163 }
 164
 165 int
 166 cfsetspeed(t, speed)
 167         struct termios *t;
 168         speed_t speed;
 169 {
 170
 171         t->c_ispeed = t->c_ospeed = speed;
 172         return (0);
 173 }
 174
 175 /*
 176  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 177  * mode with no characters interpreted, 8-bit data path.
 178  */
 179 void
 180 cfmakeraw(t)
 181         struct termios *t;
 182 {
 183
 184         t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 185         t->c_oflag &= ~OPOST;
 186         t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 187         t->c_cflag &= ~(CSIZE|PARENB);
 188         t->c_cflag |= CS8;
 189         /* XXX set MIN/TIME */
 190 }
 191
 192 tcsendbreak(fd, len)
 193         int fd, len;
 194 {
 195         struct timeval sleepytime;
 196
 197         sleepytime.tv_sec = 0;
 198         sleepytime.tv_usec = 400000;
 199         if (ioctl(fd, TIOCSBRK, 0) == -1)
 200                 return (-1);
 201         (void)select(0, 0, 0, 0, &sleepytime);
 202         if (ioctl(fd, TIOCCBRK, 0) == -1)
 203                 return (-1);
 204         return (0);
 205 }
 206
 207 tcdrain(fd)
 208         int fd;
 209 {
 210
 211         return (ioctl(fd, TIOCDRAIN, 0));
 212 }
 213
 214 tcflush(fd, which)
 215         int fd, which;
 216 {
 217         int com;
 218
 219         switch (which) {
 220         case TCIFLUSH:
 221                 com = FREAD;
 222                 break;
 223         case TCOFLUSH:
 224                 com = FWRITE;
 225                 break;
 226         case TCIOFLUSH:
 227                 com = FREAD | FWRITE;
 228                 break;
 229         default:
 230                 errno = EINVAL;
 231                 return (-1);
 232         }
 233         return (ioctl(fd, TIOCFLUSH, &com));
 234 }
 235
 236 tcflow(fd, action)
 237         int fd, action;
 238 {
 239         struct termios term;
 240         u_char c;
 241
 242         switch (action) {
 243         case TCOOFF:
 244                 return (ioctl(fd, TIOCSTOP, 0));
 245         case TCOON:
 246                 return (ioctl(fd, TIOCSTART, 0));
 247         case TCION:
 248         case TCIOFF:
 249                 if (tcgetattr(fd, &term) == -1)
 250                         return (-1);
 251                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 252                 if (c != _POSIX_VDISABLE && write(fd, &c, sizeof(c)) == -1)
 253                         return (-1);
 254                 return (0);
 255         default:
 256                 errno = EINVAL;
 257                 return (-1);
 258         }
 259         /* NOTREACHED */
 260 }