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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 static char sccsid[] = "@(#)termios.c   8.2 (Berkeley) 2/21/94";
  32 #endif /* LIBC_SCCS and not lint */
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD: src/lib/libc/gen/termios.c,v 1.16 2009/05/07 13:49:48 ed Exp $");
  35
  36 #include "namespace.h"
  37 #include <sys/types.h>
  38 #include <sys/fcntl.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/time.h>
  41
  42 #include <errno.h>
  43 #include <termios.h>
  44 #include <unistd.h>
  45 #include "un-namespace.h"
  46
  47 int
  48 tcgetattr(fd, t)
  49         int fd;
  50         struct termios *t;
  51 {
  52
  53         return (_ioctl(fd, TIOCGETA, t));
  54 }
  55
  56 int
  57 tcsetattr(fd, opt, t)
  58         int fd, opt;
  59         const struct termios *t;
  60 {
  61         struct termios localterm;
  62
  63         if (opt & TCSASOFT) {
  64                 localterm = *t;
  65                 localterm.c_cflag |= CIGNORE;
  66                 t = &localterm;
  67         }
  68         switch (opt & ~TCSASOFT) {
  69         case TCSANOW:
  70                 return (_ioctl(fd, TIOCSETA, t));
  71         case TCSADRAIN:
  72                 return (_ioctl(fd, TIOCSETAW, t));
  73         case TCSAFLUSH:
  74                 return (_ioctl(fd, TIOCSETAF, t));
  75         default:
  76                 errno = EINVAL;
  77                 return (-1);
  78         }
  79 }
  80
  81 int
  82 tcsetpgrp(int fd, pid_t pgrp)
  83 {
  84         int s;
  85
  86         s = pgrp;
  87         return (_ioctl(fd, TIOCSPGRP, &s));
  88 }
  89
  90 pid_t
  91 tcgetpgrp(fd)
  92         int fd;
  93 {
  94         int s;
  95
  96         if (_ioctl(fd, TIOCGPGRP, &s) < 0)
  97                 return ((pid_t)-1);
  98
  99         return ((pid_t)s);
 100 }
 101
 102 pid_t
 103 tcgetsid(int fd)
 104 {
 105         int s;
 106
 107         if (_ioctl(fd, TIOCGSID, &s) < 0)
 108                 return ((pid_t)-1);
 109
 110         return ((pid_t)s);
 111 }
 112
 113 int
 114 tcsetsid(int fd, pid_t pid)
 115 {
 116
 117         if (pid != getsid(0)) {
 118                 errno = EINVAL;
 119                 return (-1);
 120         }
 121
 122         return (_ioctl(fd, TIOCSCTTY, NULL));
 123 }
 124
 125 speed_t
 126 cfgetospeed(t)
 127         const struct termios *t;
 128 {
 129
 130         return (t->c_ospeed);
 131 }
 132
 133 speed_t
 134 cfgetispeed(t)
 135         const struct termios *t;
 136 {
 137
 138         return (t->c_ispeed);
 139 }
 140
 141 int
 142 cfsetospeed(t, speed)
 143         struct termios *t;
 144         speed_t speed;
 145 {
 146
 147         t->c_ospeed = speed;
 148         return (0);
 149 }
 150
 151 int
 152 cfsetispeed(t, speed)
 153         struct termios *t;
 154         speed_t speed;
 155 {
 156
 157         t->c_ispeed = speed;
 158         return (0);
 159 }
 160
 161 int
 162 cfsetspeed(t, speed)
 163         struct termios *t;
 164         speed_t speed;
 165 {
 166
 167         t->c_ispeed = t->c_ospeed = speed;
 168         return (0);
 169 }
 170
 171 /*
 172  * Make a pre-existing termios structure into "raw" mode: character-at-a-time
 173  * mode with no characters interpreted, 8-bit data path.
 174  */
 175 void
 176 cfmakeraw(t)
 177         struct termios *t;
 178 {
 179
 180         t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR);
 181         t->c_iflag |= IGNBRK;
 182         t->c_oflag &= ~OPOST;
 183         t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN);
 184         t->c_cflag &= ~(CSIZE|PARENB);
 185         t->c_cflag |= CS8|CREAD;
 186         t->c_cc[VMIN] = 1;
 187         t->c_cc[VTIME] = 0;
 188 }
 189
 190 int
 191 tcsendbreak(fd, len)
 192         int fd, len;
 193 {
 194         struct timeval sleepytime;
 195
 196         sleepytime.tv_sec = 0;
 197         sleepytime.tv_usec = 400000;
 198         if (_ioctl(fd, TIOCSBRK, 0) == -1)
 199                 return (-1);
 200         (void)_select(0, 0, 0, 0, &sleepytime);
 201         if (_ioctl(fd, TIOCCBRK, 0) == -1)
 202                 return (-1);
 203         return (0);
 204 }
 205
 206 int
 207 __tcdrain(fd)
 208         int fd;
 209 {
 210         return (_ioctl(fd, TIOCDRAIN, 0));
 211 }
 212
 213 __weak_reference(__tcdrain, tcdrain);
 214 __weak_reference(__tcdrain, _tcdrain);
 215
 216 int
 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 int
 240 tcflow(fd, action)
 241         int fd, action;
 242 {
 243         struct termios term;
 244         u_char c;
 245
 246         switch (action) {
 247         case TCOOFF:
 248                 return (_ioctl(fd, TIOCSTOP, 0));
 249         case TCOON:
 250                 return (_ioctl(fd, TIOCSTART, 0));
 251         case TCION:
 252         case TCIOFF:
 253                 if (tcgetattr(fd, &term) == -1)
 254                         return (-1);
 255                 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART];
 256                 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1)
 257                         return (-1);
 258                 return (0);
 259         default:
 260                 errno = EINVAL;
 261                 return (-1);
 262         }
 263         /* NOTREACHED */
 264 }