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 38 #include <sys/types.h> 39 #include <sys/fcntl.h> 40 #include <sys/ioctl.h> 41 #include <sys/time.h> 42 43 #include <errno.h> 44 #include <termios.h> 45 #include <unistd.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 #if __STDC__ 83 tcsetpgrp(int fd, pid_t pgrp) 84 #else 85 tcsetpgrp(fd, pgrp) 86 int fd; 87 pid_t pgrp; 88 #endif 89 { 90 int s; 91 92 s = pgrp; 93 return (ioctl(fd, TIOCSPGRP, &s)); 94 } 95 96 pid_t 97 tcgetpgrp(fd) 98 int fd; 99 { 100 int s; 101 102 if (ioctl(fd, TIOCGPGRP, &s) < 0) 103 return ((pid_t)-1); 104 105 return ((pid_t)s); 106 } 107 108 speed_t 109 cfgetospeed(t) 110 const struct termios *t; 111 { 112 113 return (t->c_ospeed); 114 } 115 116 speed_t 117 cfgetispeed(t) 118 const struct termios *t; 119 { 120 121 return (t->c_ispeed); 122 } 123 124 int 125 cfsetospeed(t, speed) 126 struct termios *t; 127 speed_t speed; 128 { 129 130 t->c_ospeed = speed; 131 return (0); 132 } 133 134 int 135 cfsetispeed(t, speed) 136 struct termios *t; 137 speed_t speed; 138 { 139 140 t->c_ispeed = speed; 141 return (0); 142 } 143 144 int 145 cfsetspeed(t, speed) 146 struct termios *t; 147 speed_t speed; 148 { 149 150 t->c_ispeed = t->c_ospeed = speed; 151 return (0); 152 } 153 154 /* 155 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 156 * mode with no characters interpreted, 8-bit data path. 157 */ 158 void 159 cfmakeraw(t) 160 struct termios *t; 161 { 162 163 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 164 t->c_iflag |= IGNBRK; 165 t->c_oflag &= ~OPOST; 166 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 167 t->c_cflag &= ~(CSIZE|PARENB); 168 t->c_cflag |= CS8; 169 t->c_cc[VMIN] = 1; 170 t->c_cc[VTIME] = 0; 171 } 172 173 int 174 tcsendbreak(fd, len) 175 int fd, len; 176 { 177 struct timeval sleepytime; 178 179 sleepytime.tv_sec = 0; 180 sleepytime.tv_usec = 400000; 181 if (ioctl(fd, TIOCSBRK, 0) == -1) 182 return (-1); 183 (void)select(0, 0, 0, 0, &sleepytime); 184 if (ioctl(fd, TIOCCBRK, 0) == -1) 185 return (-1); 186 return (0); 187 } 188 189 int 190 tcdrain(fd) 191 int fd; 192 { 193 194 return (ioctl(fd, TIOCDRAIN, 0)); 195 } 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 } 246