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. 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 * $FreeBSD: src/lib/libc/gen/termios.c,v 1.9.2.1 2000/03/18 23:13:25 jasone Exp $ 30 * 31 * @(#)termios.c 8.2 (Berkeley) 2/21/94 32 */ 33 34 #include "namespace.h" 35 #include <sys/types.h> 36 #include <sys/fcntl.h> 37 #include <sys/ioctl.h> 38 #include <sys/time.h> 39 40 #include <errno.h> 41 #include <string.h> 42 #define TTYDEFCHARS 43 #include <termios.h> 44 #include <unistd.h> 45 #include "un-namespace.h" 46 47 int 48 tcgetattr(int fd, struct termios *t) 49 { 50 51 return (_ioctl(fd, TIOCGETA, t)); 52 } 53 54 int 55 tcsetattr(int fd, int opt, const struct termios *t) 56 { 57 struct termios localterm; 58 59 if (opt & TCSASOFT) { 60 localterm = *t; 61 localterm.c_cflag |= CIGNORE; 62 t = &localterm; 63 } 64 switch (opt & ~TCSASOFT) { 65 case TCSANOW: 66 return (_ioctl(fd, TIOCSETA, t)); 67 case TCSADRAIN: 68 return (_ioctl(fd, TIOCSETAW, t)); 69 case TCSAFLUSH: 70 return (_ioctl(fd, TIOCSETAF, t)); 71 default: 72 errno = EINVAL; 73 return (-1); 74 } 75 } 76 77 int 78 tcsetpgrp(int fd, pid_t pgrp) 79 { 80 int s; 81 82 s = pgrp; 83 return (_ioctl(fd, TIOCSPGRP, &s)); 84 } 85 86 pid_t 87 tcgetpgrp(int fd) 88 { 89 int s; 90 91 if (_ioctl(fd, TIOCGPGRP, &s) < 0) 92 return ((pid_t)-1); 93 94 return ((pid_t)s); 95 } 96 97 pid_t 98 tcgetsid(int fd) 99 { 100 int s; 101 102 if (_ioctl(fd, TIOCGSID, &s) < 0) 103 return ((pid_t)-1); 104 105 return ((pid_t)s); 106 } 107 108 speed_t 109 cfgetospeed(const struct termios *t) 110 { 111 112 return (t->c_ospeed); 113 } 114 115 speed_t 116 cfgetispeed(const struct termios *t) 117 { 118 119 return (t->c_ispeed); 120 } 121 122 int 123 cfsetospeed(struct termios *t, speed_t speed) 124 { 125 126 t->c_ospeed = speed; 127 return (0); 128 } 129 130 int 131 cfsetispeed(struct termios *t, speed_t speed) 132 { 133 134 t->c_ispeed = speed; 135 return (0); 136 } 137 138 int 139 cfsetspeed(struct termios *t, speed_t speed) 140 { 141 142 t->c_ispeed = t->c_ospeed = speed; 143 return (0); 144 } 145 146 /* 147 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 148 * mode with no characters interpreted, 8-bit data path. 149 */ 150 void 151 cfmakeraw(struct termios *t) 152 { 153 154 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 155 t->c_iflag |= IGNBRK; 156 t->c_oflag &= ~OPOST; 157 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 158 t->c_cflag &= ~(CSIZE|PARENB); 159 t->c_cflag |= CS8|CREAD; 160 t->c_cc[VMIN] = 1; 161 t->c_cc[VTIME] = 0; 162 } 163 164 /* 165 * Obtain a termios structure which is similar to the one provided by 166 * the kernel. 167 */ 168 void 169 cfmakesane(struct termios *t) 170 { 171 t->c_cflag = TTYDEF_CFLAG; 172 t->c_iflag = TTYDEF_IFLAG; 173 t->c_lflag = TTYDEF_LFLAG; 174 t->c_oflag = TTYDEF_OFLAG; 175 t->c_ispeed = TTYDEF_SPEED; 176 t->c_ospeed = TTYDEF_SPEED; 177 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 178 } 179 180 int 181 tcsendbreak(int fd, int len __unused) 182 { 183 struct timeval sleepytime; 184 185 sleepytime.tv_sec = 0; 186 sleepytime.tv_usec = 400000; 187 if (_ioctl(fd, TIOCSBRK, 0) == -1) 188 return (-1); 189 _select(0, 0, 0, 0, &sleepytime); 190 if (_ioctl(fd, TIOCCBRK, 0) == -1) 191 return (-1); 192 return (0); 193 } 194 195 int 196 __tcdrain(int fd) 197 { 198 return (_ioctl(fd, TIOCDRAIN, 0)); 199 } 200 201 #ifndef _THREAD_SAFE 202 __weak_reference(__tcdrain, tcdrain); 203 #endif 204 205 int 206 tcflush(int fd, int which) 207 { 208 int com; 209 210 switch (which) { 211 case TCIFLUSH: 212 com = FREAD; 213 break; 214 case TCOFLUSH: 215 com = FWRITE; 216 break; 217 case TCIOFLUSH: 218 com = FREAD | FWRITE; 219 break; 220 default: 221 errno = EINVAL; 222 return (-1); 223 } 224 return (_ioctl(fd, TIOCFLUSH, &com)); 225 } 226 227 int 228 tcflow(int fd, int action) 229 { 230 struct termios term; 231 u_char c; 232 233 switch (action) { 234 case TCOOFF: 235 return (_ioctl(fd, TIOCSTOP, 0)); 236 case TCOON: 237 return (_ioctl(fd, TIOCSTART, 0)); 238 case TCION: 239 case TCIOFF: 240 if (tcgetattr(fd, &term) == -1) 241 return (-1); 242 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART]; 243 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1) 244 return (-1); 245 return (0); 246 default: 247 errno = EINVAL; 248 return (-1); 249 } 250 /* NOTREACHED */ 251 } 252