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 32 #include <sys/cdefs.h> 33 __SCCSID("@(#)termios.c 8.2 (Berkeley) 2/21/94"); 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 #include "libc_private.h" 48 49 int 50 tcgetattr(int fd, struct termios *t) 51 { 52 53 return (_ioctl(fd, TIOCGETA, t)); 54 } 55 56 int 57 tcsetattr(int fd, int opt, const struct termios *t) 58 { 59 struct termios localterm; 60 61 if (opt & TCSASOFT) { 62 localterm = *t; 63 localterm.c_cflag |= CIGNORE; 64 t = &localterm; 65 } 66 switch (opt & ~TCSASOFT) { 67 case TCSANOW: 68 return (_ioctl(fd, TIOCSETA, t)); 69 case TCSADRAIN: 70 return (_ioctl(fd, TIOCSETAW, t)); 71 case TCSAFLUSH: 72 return (_ioctl(fd, TIOCSETAF, t)); 73 default: 74 errno = EINVAL; 75 return (-1); 76 } 77 } 78 79 int 80 tcsetpgrp(int fd, pid_t pgrp) 81 { 82 int s; 83 84 s = pgrp; 85 return (_ioctl(fd, TIOCSPGRP, &s)); 86 } 87 88 pid_t 89 tcgetpgrp(int fd) 90 { 91 int s; 92 93 if (_ioctl(fd, TIOCGPGRP, &s) < 0) 94 return ((pid_t)-1); 95 96 return ((pid_t)s); 97 } 98 99 pid_t 100 tcgetsid(int fd) 101 { 102 int s; 103 104 if (_ioctl(fd, TIOCGSID, &s) < 0) 105 return ((pid_t)-1); 106 107 return ((pid_t)s); 108 } 109 110 int 111 tcsetsid(int fd, pid_t pid) 112 { 113 114 if (pid != getsid(0)) { 115 errno = EINVAL; 116 return (-1); 117 } 118 119 return (_ioctl(fd, TIOCSCTTY, NULL)); 120 } 121 122 speed_t 123 cfgetospeed(const struct termios *t) 124 { 125 126 return (t->c_ospeed); 127 } 128 129 speed_t 130 cfgetispeed(const struct termios *t) 131 { 132 133 return (t->c_ispeed); 134 } 135 136 int 137 cfsetospeed(struct termios *t, speed_t speed) 138 { 139 140 t->c_ospeed = speed; 141 return (0); 142 } 143 144 int 145 cfsetispeed(struct termios *t, speed_t speed) 146 { 147 148 t->c_ispeed = speed; 149 return (0); 150 } 151 152 int 153 cfsetspeed(struct termios *t, speed_t speed) 154 { 155 156 t->c_ispeed = t->c_ospeed = speed; 157 return (0); 158 } 159 160 /* 161 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 162 * mode with no characters interpreted, 8-bit data path. 163 */ 164 void 165 cfmakeraw(struct termios *t) 166 { 167 168 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 169 t->c_iflag |= IGNBRK; 170 t->c_oflag &= ~OPOST; 171 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 172 t->c_cflag &= ~(CSIZE|PARENB); 173 t->c_cflag |= CS8|CREAD; 174 t->c_cc[VMIN] = 1; 175 t->c_cc[VTIME] = 0; 176 } 177 178 /* 179 * Obtain a termios structure which is similar to the one provided by 180 * the kernel. 181 */ 182 void 183 cfmakesane(struct termios *t) 184 { 185 186 t->c_cflag = TTYDEF_CFLAG; 187 t->c_iflag = TTYDEF_IFLAG; 188 t->c_lflag = TTYDEF_LFLAG; 189 t->c_oflag = TTYDEF_OFLAG; 190 t->c_ispeed = TTYDEF_SPEED; 191 t->c_ospeed = TTYDEF_SPEED; 192 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 193 } 194 195 int 196 tcsendbreak(int fd, int len __unused) 197 { 198 struct timeval sleepytime; 199 200 sleepytime.tv_sec = 0; 201 sleepytime.tv_usec = 400000; 202 if (_ioctl(fd, TIOCSBRK, 0) == -1) 203 return (-1); 204 (void)_select(0, 0, 0, 0, &sleepytime); 205 if (_ioctl(fd, TIOCCBRK, 0) == -1) 206 return (-1); 207 return (0); 208 } 209 210 int 211 __libc_tcdrain(int fd) 212 { 213 214 return (_ioctl(fd, TIOCDRAIN, 0)); 215 } 216 217 #pragma weak tcdrain 218 int 219 tcdrain(int fd) 220 { 221 222 return (((int (*)(int)) 223 __libc_interposing[INTERPOS_tcdrain])(fd)); 224 } 225 226 __weak_reference(__libc_tcdrain, __tcdrain); 227 __weak_reference(__libc_tcdrain, _tcdrain); 228 229 int 230 tcflush(int fd, int which) 231 { 232 int com; 233 234 switch (which) { 235 case TCIFLUSH: 236 com = FREAD; 237 break; 238 case TCOFLUSH: 239 com = FWRITE; 240 break; 241 case TCIOFLUSH: 242 com = FREAD | FWRITE; 243 break; 244 default: 245 errno = EINVAL; 246 return (-1); 247 } 248 return (_ioctl(fd, TIOCFLUSH, &com)); 249 } 250 251 int 252 tcflow(int fd, int action) 253 { 254 struct termios term; 255 u_char c; 256 257 switch (action) { 258 case TCOOFF: 259 return (_ioctl(fd, TIOCSTOP, 0)); 260 case TCOON: 261 return (_ioctl(fd, TIOCSTART, 0)); 262 case TCION: 263 case TCIOFF: 264 if (tcgetattr(fd, &term) == -1) 265 return (-1); 266 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART]; 267 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1) 268 return (-1); 269 return (0); 270 default: 271 errno = EINVAL; 272 return (-1); 273 } 274 /* NOTREACHED */ 275 } 276 277 int 278 tcgetwinsize(int fd, struct winsize *w) 279 { 280 281 return (_ioctl(fd, TIOCGWINSZ, w)); 282 } 283 284 int 285 tcsetwinsize(int fd, const struct winsize *w) 286 { 287 288 return (_ioctl(fd, TIOCSWINSZ, w)); 289 } 290