lib/libc/gen/termios.c

   1 /*-
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/lib/libc/gen/termios.c,v 1.9.2.1 2000/03/18 23:13:25 jasone Exp $
  34  * $DragonFly: src/lib/libc/gen/termios.c,v 1.5 2005/11/19 22:32:53 swildner Exp $
  35  *
  36  * @(#)termios.c        8.2 (Berkeley) 2/21/94
  37  */
  38
  39 #include "namespace.h"
  40 #include <sys/types.h>
  41 #include <sys/fcntl.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/time.h>
  44
  45 #include <errno.h>
  46 #include <termios.h>
  47 #include <unistd.h>
  48 #include "un-namespace.h"
  49
  50 int
  51 tcgetattr(int fd, struct termios *t)
  52 {
  53
  54         return (_ioctl(fd, TIOCGETA, t));
  55 }
  56
  57 int
  58 tcsetattr(int fd, int opt, const struct termios *t)
  59 {
  60         struct termios localterm;
  61
  62         if (opt & TCSASOFT) {
  63                 localterm = *t;
  64                 localterm.c_cflag |= CIGNORE;
  65                 t = &localterm;
  66         }
  67         switch (opt & ~TCSASOFT) {
  68         case TCSANOW:
  69                 return (_ioctl(fd, TIOCSETA, t));
  70         case TCSADRAIN:
  71                 return (_ioctl(fd, TIOCSETAW, t));
  72         case TCSAFLUSH:
  73                 return (_ioctl(fd, TIOCSETAF, t));
  74         default:
  75                 errno = EINVAL;
  76                 return (-1);
  77         }
  78 }
  79
  80 int
  81 tcsetpgrp(int fd, pid_t pgrp)
  82 {
  83         int s;
  84
  85         s = pgrp;
  86         return (_ioctl(fd, TIOCSPGRP, &s));
  87 }
  88
  89 pid_t
  90 tcgetpgrp(int fd)
  91 {
  92         int s;
  93
  94         if (_ioctl(fd, TIOCGPGRP, &s) < 0)
  95                 return ((pid_t)-1);
  96
  97         return ((pid_t)s);
  98 }
  99
 100 speed_t
 101 cfgetospeed(const struct termios *t)
 102 {
 103
 104         return (t->c_ospeed);
 105 }
 106
 107 speed_t
 108 cfgetispeed(const struct termios *t)
 109 {
 110
 111         return (t->c_ispeed);
 112 }
 113
 114 int
 115 cfsetospeed(struct termios *t, speed_t speed)
 116 {
 117
 118         t->c_ospeed = speed;
 119         return (0);
 120 }
 121
 122 int
 123 cfsetispeed(struct termios *t, speed_t speed)
 124 {
 125
 126         t->c_ispeed = speed;
 127         return (0);
 128 }
 129
 130 int
 131 cfsetspeed(struct termios *t, speed_t speed)
 132 {
 133
 134         t->c_ispeed = t->c_ospeed = speed;
 135         return (0);
 136 }
 137
 138 /*
 139  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 140  * mode with no characters interpreted, 8-bit data path.
 141  */
 142 void
 143 cfmakeraw(struct termios *t)
 144 {
 145
 146         t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
 147         t->c_iflag |= IGNBRK;
 148         t->c_oflag &= ~OPOST;
 149         t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
 150         t->c_cflag &= ~(CSIZE|PARENB);
 151         t->c_cflag |= CS8|CREAD;
 152         t->c_cc[VMIN] = 1;
 153         t->c_cc[VTIME] = 0;
 154 }
 155
 156 int
 157 tcsendbreak(int fd, int len __unused)
 158 {
 159         struct timeval sleepytime;
 160
 161         sleepytime.tv_sec = 0;
 162         sleepytime.tv_usec = 400000;
 163         if (_ioctl(fd, TIOCSBRK, 0) == -1)
 164                 return (-1);
 165         _select(0, 0, 0, 0, &sleepytime);
 166         if (_ioctl(fd, TIOCCBRK, 0) == -1)
 167                 return (-1);
 168         return (0);
 169 }
 170
 171 int
 172 __tcdrain(int fd)
 173 {
 174         return (_ioctl(fd, TIOCDRAIN, 0));
 175 }
 176
 177 #ifndef _THREAD_SAFE
 178 __weak_reference(__tcdrain, tcdrain);
 179 #endif
 180
 181 int
 182 tcflush(int fd, int which)
 183 {
 184         int com;
 185
 186         switch (which) {
 187         case TCIFLUSH:
 188                 com = FREAD;
 189                 break;
 190         case TCOFLUSH:
 191                 com = FWRITE;
 192                 break;
 193         case TCIOFLUSH:
 194                 com = FREAD | FWRITE;
 195                 break;
 196         default:
 197                 errno = EINVAL;
 198                 return (-1);
 199         }
 200         return (_ioctl(fd, TIOCFLUSH, &com));
 201 }
 202
 203 int
 204 tcflow(int fd, int action)
 205 {
 206         struct termios term;
 207         u_char c;
 208
 209         switch (action) {
 210         case TCOOFF:
 211                 return (_ioctl(fd, TIOCSTOP, 0));
 212         case TCOON:
 213                 return (_ioctl(fd, TIOCSTART, 0));
 214         case TCION:
 215         case TCIOFF:
 216                 if (tcgetattr(fd, &term) == -1)
 217                         return (-1);
 218                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 219                 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
 220                         return (-1);
 221                 return (0);
 222         default:
 223                 errno = EINVAL;
 224                 return (-1);
 225         }
 226         /* NOTREACHED */
 227 }