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 "namespace.h" 33 #include <sys/types.h> 34 #include <sys/fcntl.h> 35 #include <sys/ioctl.h> 36 #include <sys/time.h> 37 38 #include <errno.h> 39 #include <string.h> 40 #define TTYDEFCHARS 41 #include <termios.h> 42 #include <unistd.h> 43 #include "un-namespace.h" 44 45 #include "libc_private.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 int 109 tcsetsid(int fd, pid_t pid) 110 { 111 112 if (pid != getsid(0)) { 113 errno = EINVAL; 114 return (-1); 115 } 116 117 return (_ioctl(fd, TIOCSCTTY, NULL)); 118 } 119 120 speed_t 121 cfgetospeed(const struct termios *t) 122 { 123 124 return (t->c_ospeed); 125 } 126 127 speed_t 128 cfgetispeed(const struct termios *t) 129 { 130 131 return (t->c_ispeed); 132 } 133 134 int 135 cfsetospeed(struct termios *t, speed_t speed) 136 { 137 138 t->c_ospeed = speed; 139 return (0); 140 } 141 142 int 143 cfsetispeed(struct termios *t, speed_t speed) 144 { 145 146 t->c_ispeed = speed; 147 return (0); 148 } 149 150 int 151 cfsetspeed(struct termios *t, speed_t speed) 152 { 153 154 t->c_ispeed = t->c_ospeed = speed; 155 return (0); 156 } 157 158 /* 159 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 160 * mode with no characters interpreted, 8-bit data path. 161 */ 162 void 163 cfmakeraw(struct termios *t) 164 { 165 166 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 167 t->c_iflag |= IGNBRK; 168 t->c_oflag &= ~OPOST; 169 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 170 t->c_cflag &= ~(CSIZE|PARENB); 171 t->c_cflag |= CS8|CREAD; 172 t->c_cc[VMIN] = 1; 173 t->c_cc[VTIME] = 0; 174 } 175 176 /* 177 * Obtain a termios structure which is similar to the one provided by 178 * the kernel. 179 */ 180 void 181 cfmakesane(struct termios *t) 182 { 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 (void)_select(0, 0, 0, 0, &sleepytime); 203 if (_ioctl(fd, TIOCCBRK, 0) == -1) 204 return (-1); 205 return (0); 206 } 207 208 int 209 __libc_tcdrain(int fd) 210 { 211 212 return (_ioctl(fd, TIOCDRAIN, 0)); 213 } 214 215 #pragma weak tcdrain 216 int 217 tcdrain(int fd) 218 { 219 220 return (((int (*)(int)) 221 __libc_interposing[INTERPOS_tcdrain])(fd)); 222 } 223 224 __weak_reference(__libc_tcdrain, __tcdrain); 225 __weak_reference(__libc_tcdrain, _tcdrain); 226 227 int 228 tcflush(int fd, int which) 229 { 230 int com; 231 232 switch (which) { 233 case TCIFLUSH: 234 com = FREAD; 235 break; 236 case TCOFLUSH: 237 com = FWRITE; 238 break; 239 case TCIOFLUSH: 240 com = FREAD | FWRITE; 241 break; 242 default: 243 errno = EINVAL; 244 return (-1); 245 } 246 return (_ioctl(fd, TIOCFLUSH, &com)); 247 } 248 249 int 250 tcflow(int fd, int action) 251 { 252 struct termios term; 253 u_char c; 254 255 switch (action) { 256 case TCOOFF: 257 return (_ioctl(fd, TIOCSTOP, 0)); 258 case TCOON: 259 return (_ioctl(fd, TIOCSTART, 0)); 260 case TCION: 261 case TCIOFF: 262 if (tcgetattr(fd, &term) == -1) 263 return (-1); 264 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART]; 265 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1) 266 return (-1); 267 return (0); 268 default: 269 errno = EINVAL; 270 return (-1); 271 } 272 /* NOTREACHED */ 273 } 274 275 int 276 tcgetwinsize(int fd, struct winsize *w) 277 { 278 279 return (_ioctl(fd, TIOCGWINSZ, w)); 280 } 281 282 int 283 tcsetwinsize(int fd, const struct winsize *w) 284 { 285 286 return (_ioctl(fd, TIOCSWINSZ, w)); 287 } 288