1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)termios.c 8.2 (Berkeley) 2/21/94 32 * $FreeBSD: head/lib/libc/gen/termios.c 326025 2017-11-20 19:49:47Z pfg $ 33 */ 34 35 #include "namespace.h" 36 #include <sys/types.h> 37 #include <sys/fcntl.h> 38 #include <sys/ioctl.h> 39 #include <sys/time.h> 40 41 #include <errno.h> 42 #include <string.h> 43 #define TTYDEFCHARS 44 #include <termios.h> 45 #include <unistd.h> 46 #include "un-namespace.h" 47 48 int 49 tcgetattr(int fd, struct termios *t) 50 { 51 52 return (_ioctl(fd, TIOCGETA, t)); 53 } 54 55 int 56 tcsetattr(int fd, int opt, const struct termios *t) 57 { 58 struct termios localterm; 59 60 if (opt & TCSASOFT) { 61 localterm = *t; 62 localterm.c_cflag |= CIGNORE; 63 t = &localterm; 64 } 65 switch (opt & ~TCSASOFT) { 66 case TCSANOW: 67 return (_ioctl(fd, TIOCSETA, t)); 68 case TCSADRAIN: 69 return (_ioctl(fd, TIOCSETAW, t)); 70 case TCSAFLUSH: 71 return (_ioctl(fd, TIOCSETAF, t)); 72 default: 73 errno = EINVAL; 74 return (-1); 75 } 76 } 77 78 int 79 tcsetpgrp(int fd, pid_t pgrp) 80 { 81 int s; 82 83 s = pgrp; 84 return (_ioctl(fd, TIOCSPGRP, &s)); 85 } 86 87 pid_t 88 tcgetpgrp(int fd) 89 { 90 int s; 91 92 if (_ioctl(fd, TIOCGPGRP, &s) < 0) 93 return ((pid_t)-1); 94 95 return ((pid_t)s); 96 } 97 98 pid_t 99 tcgetsid(int fd) 100 { 101 int s; 102 103 if (_ioctl(fd, TIOCGSID, &s) < 0) 104 return ((pid_t)-1); 105 106 return ((pid_t)s); 107 } 108 109 int 110 tcsetsid(int fd, pid_t pid) 111 { 112 113 if (pid != getsid(0)) { 114 errno = EINVAL; 115 return (-1); 116 } 117 118 return (_ioctl(fd, TIOCSCTTY, NULL)); 119 } 120 121 speed_t 122 cfgetospeed(const struct termios *t) 123 { 124 125 return (t->c_ospeed); 126 } 127 128 speed_t 129 cfgetispeed(const struct termios *t) 130 { 131 132 return (t->c_ispeed); 133 } 134 135 int 136 cfsetospeed(struct termios *t, speed_t speed) 137 { 138 139 t->c_ospeed = speed; 140 return (0); 141 } 142 143 int 144 cfsetispeed(struct termios *t, speed_t speed) 145 { 146 147 t->c_ispeed = speed; 148 return (0); 149 } 150 151 int 152 cfsetspeed(struct termios *t, speed_t speed) 153 { 154 155 t->c_ispeed = t->c_ospeed = speed; 156 return (0); 157 } 158 159 /* 160 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 161 * mode with no characters interpreted, 8-bit data path. 162 */ 163 void 164 cfmakeraw(struct termios *t) 165 { 166 167 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 168 t->c_iflag |= IGNBRK; 169 t->c_oflag &= ~OPOST; 170 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 171 t->c_cflag &= ~(CSIZE|PARENB); 172 t->c_cflag |= CS8|CREAD; 173 t->c_cc[VMIN] = 1; 174 t->c_cc[VTIME] = 0; 175 } 176 177 /* 178 * Obtain a termios structure which is similar to the one provided by 179 * the kernel. 180 */ 181 void 182 cfmakesane(struct termios *t) 183 { 184 t->c_cflag = TTYDEF_CFLAG; 185 t->c_iflag = TTYDEF_IFLAG; 186 t->c_lflag = TTYDEF_LFLAG; 187 t->c_oflag = TTYDEF_OFLAG; 188 t->c_ispeed = TTYDEF_SPEED; 189 t->c_ospeed = TTYDEF_SPEED; 190 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 191 } 192 193 int 194 tcsendbreak(int fd, int len __unused) 195 { 196 struct timeval sleepytime; 197 198 sleepytime.tv_sec = 0; 199 sleepytime.tv_usec = 400000; 200 if (_ioctl(fd, TIOCSBRK, 0) == -1) 201 return (-1); 202 _select(0, 0, 0, 0, &sleepytime); 203 if (_ioctl(fd, TIOCCBRK, 0) == -1) 204 return (-1); 205 return (0); 206 } 207 208 int 209 __tcdrain(int fd) 210 { 211 return (_ioctl(fd, TIOCDRAIN, 0)); 212 } 213 214 #ifndef _THREAD_SAFE 215 __weak_reference(__tcdrain, tcdrain); 216 #endif 217 218 int 219 tcflush(int fd, int which) 220 { 221 int com; 222 223 switch (which) { 224 case TCIFLUSH: 225 com = FREAD; 226 break; 227 case TCOFLUSH: 228 com = FWRITE; 229 break; 230 case TCIOFLUSH: 231 com = FREAD | FWRITE; 232 break; 233 default: 234 errno = EINVAL; 235 return (-1); 236 } 237 return (_ioctl(fd, TIOCFLUSH, &com)); 238 } 239 240 int 241 tcflow(int fd, int 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 } 265