gen/termios.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1989, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 #include <sys/types.h>
  60 #include <sys/ioctl.h>
  61 #include <sys/tty.h>
  62 #include <sys/time.h>
  63 #define KERNEL                  /* XXX - FREAD and FWRITE ifdef'd KERNEL*/
  64 #include <sys/fcntl.h>
  65 #undef KERNEL
  66
  67 #include <errno.h>
  68 #include <stdio.h>
  69 #include <termios.h>
  70 #include <unistd.h>
  71
  72 int
  73 tcgetattr(fd, t)
  74         int fd;
  75         struct termios *t;
  76 {
  77
  78         return (ioctl(fd, TIOCGETA, t));
  79 }
  80
  81 int
  82 tcsetattr(fd, opt, t)
  83         int fd, opt;
  84         const struct termios *t;
  85 {
  86         struct termios localterm;
  87
  88         if (opt & TCSASOFT) {
  89                 localterm = *t;
  90                 localterm.c_cflag |= CIGNORE;
  91                 t = &localterm;
  92         }
  93         switch (opt & ~TCSASOFT) {
  94         case TCSANOW:
  95                 return (ioctl(fd, TIOCSETA, t));
  96         case TCSADRAIN:
  97                 return (ioctl(fd, TIOCSETAW, t));
  98         case TCSAFLUSH:
  99                 return (ioctl(fd, TIOCSETAF, t));
 100         default:
 101                 errno = EINVAL;
 102                 return (-1);
 103         }
 104 }
 105
 106 int
 107 #if __STDC__
 108 tcsetpgrp(int fd, pid_t pgrp)
 109 #else
 110 tcsetpgrp(fd, pgrp)
 111         int fd;
 112         pid_t pgrp;
 113 #endif
 114 {
 115         int s;
 116
 117         s = pgrp;
 118         return (ioctl(fd, TIOCSPGRP, &s));
 119 }
 120
 121 pid_t
 122 tcgetpgrp(fd)
 123 {
 124         int s;
 125
 126         if (ioctl(fd, TIOCGPGRP, &s) < 0)
 127                 return ((pid_t)-1);
 128
 129         return ((pid_t)s);
 130 }
 131
 132 speed_t
 133 cfgetospeed(t)
 134         const struct termios *t;
 135 {
 136
 137         return (t->c_ospeed);
 138 }
 139
 140 speed_t
 141 cfgetispeed(t)
 142         const struct termios *t;
 143 {
 144
 145         return (t->c_ispeed);
 146 }
 147
 148 int
 149 cfsetospeed(t, speed)
 150         struct termios *t;
 151         speed_t speed;
 152 {
 153
 154         t->c_ospeed = speed;
 155         return (0);
 156 }
 157
 158 int
 159 cfsetispeed(t, speed)
 160         struct termios *t;
 161         speed_t speed;
 162 {
 163
 164         t->c_ispeed = speed;
 165         return (0);
 166 }
 167
 168 int
 169 cfsetspeed(t, speed)
 170         struct termios *t;
 171         speed_t speed;
 172 {
 173
 174         t->c_ispeed = t->c_ospeed = speed;
 175         return (0);
 176 }
 177
 178 /*
 179  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 180  * mode with no characters interpreted, 8-bit data path.
 181  */
 182 void
 183 cfmakeraw(t)
 184         struct termios *t;
 185 {
 186
 187         t->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
 188         t->c_oflag &= ~OPOST;
 189         t->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
 190         t->c_cflag &= ~(CSIZE|PARENB);
 191         t->c_cflag |= CS8;
 192         /* XXX set MIN/TIME */
 193 }
 194
 195 tcsendbreak(fd, len)
 196         int fd, len;
 197 {
 198         struct timeval sleepytime;
 199
 200         sleepytime.tv_sec = 0;
 201         sleepytime.tv_usec = 400000;
 202         if (ioctl(fd, TIOCSBRK, 0) == -1)
 203                 return (-1);
 204         (void)select(0, 0, 0, 0, &sleepytime);
 205         if (ioctl(fd, TIOCCBRK, 0) == -1)
 206                 return (-1);
 207         return (0);
 208 }
 209
 210 tcdrain(fd)
 211         int fd;
 212 {
 213
 214         return (ioctl(fd, TIOCDRAIN, 0));
 215 }
 216
 217 tcflush(fd, which)
 218         int fd, which;
 219 {
 220         int com;
 221
 222         switch (which) {
 223         case TCIFLUSH:
 224                 com = FREAD;
 225                 break;
 226         case TCOFLUSH:
 227                 com = FWRITE;
 228                 break;
 229         case TCIOFLUSH:
 230                 com = FREAD | FWRITE;
 231                 break;
 232         default:
 233                 errno = EINVAL;
 234                 return (-1);
 235         }
 236         return (ioctl(fd, TIOCFLUSH, &com));
 237 }
 238
 239 tcflow(fd, action)
 240         int fd, action;
 241 {
 242         struct termios term;
 243         u_char c;
 244
 245         switch (action) {
 246         case TCOOFF:
 247                 return (ioctl(fd, TIOCSTOP, 0));
 248         case TCOON:
 249                 return (ioctl(fd, TIOCSTART, 0));
 250         case TCION:
 251         case TCIOFF:
 252                 if (tcgetattr(fd, &term) == -1)
 253                         return (-1);
 254                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 255                 if (c != _POSIX_VDISABLE && write(fd, &c, sizeof(c)) == -1)
 256                         return (-1);
 257                 return (0);
 258         default:
 259                 errno = EINVAL;
 260                 return (-1);
 261         }
 262         /* NOTREACHED */
 263 }