gen/FreeBSD/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
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)termios.c   8.2 (Berkeley) 2/21/94";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/gen/termios.c,v 1.13 2002/05/28 16:59:39 alfred Exp $");
  39
  40 #include "namespace.h"
  41 #include <sys/types.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/ioctl.h>
  44 #include <sys/time.h>
  45
  46 #include <errno.h>
  47 #include <termios.h>
  48 #include <unistd.h>
  49 #include "un-namespace.h"
  50
  51 int
  52 tcgetattr(fd, t)
  53         int fd;
  54         struct termios *t;
  55 {
  56
  57         return (_ioctl(fd, TIOCGETA, t));
  58 }
  59
  60 int
  61 tcsetattr(fd, opt, t)
  62         int fd, opt;
  63         const struct termios *t;
  64 {
  65         struct termios localterm;
  66
  67         if (opt & TCSASOFT) {
  68                 localterm = *t;
  69                 localterm.c_cflag |= CIGNORE;
  70                 t = &localterm;
  71         }
  72         switch (opt & ~TCSASOFT) {
  73         case TCSANOW:
  74                 return (_ioctl(fd, TIOCSETA, t));
  75         case TCSADRAIN:
  76                 return (_ioctl(fd, TIOCSETAW, t));
  77         case TCSAFLUSH:
  78                 return (_ioctl(fd, TIOCSETAF, t));
  79         default:
  80                 errno = EINVAL;
  81                 return (-1);
  82         }
  83 }
  84
  85 int
  86 tcsetpgrp(int fd, pid_t pgrp)
  87 {
  88         int s;
  89
  90         s = pgrp;
  91         return (_ioctl(fd, TIOCSPGRP, &s));
  92 }
  93
  94 pid_t
  95 tcgetpgrp(fd)
  96         int fd;
  97 {
  98         int s;
  99
 100         if (_ioctl(fd, TIOCGPGRP, &s) < 0)
 101                 return ((pid_t)-1);
 102
 103         return ((pid_t)s);
 104 }
 105
 106 speed_t
 107 cfgetospeed(t)
 108         const struct termios *t;
 109 {
 110
 111         return (t->c_ospeed);
 112 }
 113
 114 speed_t
 115 cfgetispeed(t)
 116         const struct termios *t;
 117 {
 118
 119         return (t->c_ispeed);
 120 }
 121
 122 int
 123 cfsetospeed(t, speed)
 124         struct termios *t;
 125         speed_t speed;
 126 {
 127
 128         t->c_ospeed = speed;
 129         return (0);
 130 }
 131
 132 int
 133 cfsetispeed(t, speed)
 134         struct termios *t;
 135         speed_t speed;
 136 {
 137
 138         t->c_ispeed = speed;
 139         return (0);
 140 }
 141
 142 int
 143 cfsetspeed(t, speed)
 144         struct termios *t;
 145         speed_t speed;
 146 {
 147
 148         t->c_ispeed = t->c_ospeed = speed;
 149         return (0);
 150 }
 151
 152 /*
 153  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 154  * mode with no characters interpreted, 8-bit data path.
 155  */
 156 void
 157 cfmakeraw(t)
 158         struct termios *t;
 159 {
 160
 161         t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
 162         t->c_iflag |= IGNBRK;
 163         t->c_oflag &= ~OPOST;
 164         t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
 165         t->c_cflag &= ~(CSIZE|PARENB);
 166         t->c_cflag |= CS8|CREAD;
 167         t->c_cc[VMIN] = 1;
 168         t->c_cc[VTIME] = 0;
 169 }
 170
 171 int
 172 tcsendbreak(fd, len)
 173         int fd, len;
 174 {
 175         struct timeval sleepytime;
 176
 177         sleepytime.tv_sec = 0;
 178         sleepytime.tv_usec = 400000;
 179         if (_ioctl(fd, TIOCSBRK, 0) == -1)
 180                 return (-1);
 181         (void)_select(0, 0, 0, 0, &sleepytime);
 182         if (_ioctl(fd, TIOCCBRK, 0) == -1)
 183                 return (-1);
 184         return (0);
 185 }
 186
 187 int
 188 __tcdrain(fd)
 189         int fd;
 190 {
 191         return (_ioctl(fd, TIOCDRAIN, 0));
 192 }
 193
 194 __weak_reference(__tcdrain, tcdrain);
 195 __weak_reference(__tcdrain, _tcdrain);
 196
 197 int
 198 tcflush(fd, which)
 199         int fd, which;
 200 {
 201         int com;
 202
 203         switch (which) {
 204         case TCIFLUSH:
 205                 com = FREAD;
 206                 break;
 207         case TCOFLUSH:
 208                 com = FWRITE;
 209                 break;
 210         case TCIOFLUSH:
 211                 com = FREAD | FWRITE;
 212                 break;
 213         default:
 214                 errno = EINVAL;
 215                 return (-1);
 216         }
 217         return (_ioctl(fd, TIOCFLUSH, &com));
 218 }
 219
 220 int
 221 tcflow(fd, action)
 222         int fd, action;
 223 {
 224         struct termios term;
 225         u_char c;
 226
 227         switch (action) {
 228         case TCOOFF:
 229                 return (_ioctl(fd, TIOCSTOP, 0));
 230         case TCOON:
 231                 return (_ioctl(fd, TIOCSTART, 0));
 232         case TCION:
 233         case TCIOFF:
 234                 if (tcgetattr(fd, &term) == -1)
 235                         return (-1);
 236                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 237                 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
 238                         return (-1);
 239                 return (0);
 240         default:
 241                 errno = EINVAL;
 242                 return (-1);
 243         }
 244         /* NOTREACHED */
 245 }