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 pid_t
 101 tcgetsid(int fd)
 102 {
 103         int s;
 104
 105         if (_ioctl(fd, TIOCGSID, &s) < 0)
 106                 return ((pid_t)-1);
 107
 108         return ((pid_t)s);
 109 }
 110
 111 speed_t
 112 cfgetospeed(const struct termios *t)
 113 {
 114
 115         return (t->c_ospeed);
 116 }
 117
 118 speed_t
 119 cfgetispeed(const struct termios *t)
 120 {
 121
 122         return (t->c_ispeed);
 123 }
 124
 125 int
 126 cfsetospeed(struct termios *t, speed_t speed)
 127 {
 128
 129         t->c_ospeed = speed;
 130         return (0);
 131 }
 132
 133 int
 134 cfsetispeed(struct termios *t, speed_t speed)
 135 {
 136
 137         t->c_ispeed = speed;
 138         return (0);
 139 }
 140
 141 int
 142 cfsetspeed(struct termios *t, speed_t speed)
 143 {
 144
 145         t->c_ispeed = t->c_ospeed = speed;
 146         return (0);
 147 }
 148
 149 /*
 150  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 151  * mode with no characters interpreted, 8-bit data path.
 152  */
 153 void
 154 cfmakeraw(struct termios *t)
 155 {
 156
 157         t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
 158         t->c_iflag |= IGNBRK;
 159         t->c_oflag &= ~OPOST;
 160         t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
 161         t->c_cflag &= ~(CSIZE|PARENB);
 162         t->c_cflag |= CS8|CREAD;
 163         t->c_cc[VMIN] = 1;
 164         t->c_cc[VTIME] = 0;
 165 }
 166
 167 int
 168 tcsendbreak(int fd, int len __unused)
 169 {
 170         struct timeval sleepytime;
 171
 172         sleepytime.tv_sec = 0;
 173         sleepytime.tv_usec = 400000;
 174         if (_ioctl(fd, TIOCSBRK, 0) == -1)
 175                 return (-1);
 176         _select(0, 0, 0, 0, &sleepytime);
 177         if (_ioctl(fd, TIOCCBRK, 0) == -1)
 178                 return (-1);
 179         return (0);
 180 }
 181
 182 int
 183 __tcdrain(int fd)
 184 {
 185         return (_ioctl(fd, TIOCDRAIN, 0));
 186 }
 187
 188 #ifndef _THREAD_SAFE
 189 __weak_reference(__tcdrain, tcdrain);
 190 #endif
 191
 192 int
 193 tcflush(int fd, int which)
 194 {
 195         int com;
 196
 197         switch (which) {
 198         case TCIFLUSH:
 199                 com = FREAD;
 200                 break;
 201         case TCOFLUSH:
 202                 com = FWRITE;
 203                 break;
 204         case TCIOFLUSH:
 205                 com = FREAD | FWRITE;
 206                 break;
 207         default:
 208                 errno = EINVAL;
 209                 return (-1);
 210         }
 211         return (_ioctl(fd, TIOCFLUSH, &com));
 212 }
 213
 214 int
 215 tcflow(int fd, int action)
 216 {
 217         struct termios term;
 218         u_char c;
 219
 220         switch (action) {
 221         case TCOOFF:
 222                 return (_ioctl(fd, TIOCSTOP, 0));
 223         case TCOON:
 224                 return (_ioctl(fd, TIOCSTART, 0));
 225         case TCION:
 226         case TCIOFF:
 227                 if (tcgetattr(fd, &term) == -1)
 228                         return (-1);
 229                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 230                 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
 231                         return (-1);
 232                 return (0);
 233         default:
 234                 errno = EINVAL;
 235                 return (-1);
 236         }
 237         /* NOTREACHED */
 238 }