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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)termios.c 8.2 (Berkeley) 2/21/94"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include <sys/types.h> 38 #include <sys/fcntl.h> 39 #include <sys/ioctl.h> 40 #include <sys/time.h> 41 42 #include <errno.h> 43 #include <string.h> 44 #define TTYDEFCHARS 45 #include <termios.h> 46 #include <unistd.h> 47 #include "un-namespace.h" 48 49 #include "libc_private.h" 50 51 int 52 tcgetattr(int fd, struct termios *t) 53 { 54 55 return (_ioctl(fd, TIOCGETA, t)); 56 } 57 58 int 59 tcsetattr(int fd, int opt, 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 tcsetpgrp(int fd, pid_t pgrp) 83 { 84 int s; 85 86 s = pgrp; 87 return (_ioctl(fd, TIOCSPGRP, &s)); 88 } 89 90 pid_t 91 tcgetpgrp(int fd) 92 { 93 int s; 94 95 if (_ioctl(fd, TIOCGPGRP, &s) < 0) 96 return ((pid_t)-1); 97 98 return ((pid_t)s); 99 } 100 101 pid_t 102 tcgetsid(int fd) 103 { 104 int s; 105 106 if (_ioctl(fd, TIOCGSID, &s) < 0) 107 return ((pid_t)-1); 108 109 return ((pid_t)s); 110 } 111 112 int 113 tcsetsid(int fd, pid_t pid) 114 { 115 116 if (pid != getsid(0)) { 117 errno = EINVAL; 118 return (-1); 119 } 120 121 return (_ioctl(fd, TIOCSCTTY, NULL)); 122 } 123 124 speed_t 125 cfgetospeed(const struct termios *t) 126 { 127 128 return (t->c_ospeed); 129 } 130 131 speed_t 132 cfgetispeed(const struct termios *t) 133 { 134 135 return (t->c_ispeed); 136 } 137 138 int 139 cfsetospeed(struct termios *t, speed_t speed) 140 { 141 142 t->c_ospeed = speed; 143 return (0); 144 } 145 146 int 147 cfsetispeed(struct termios *t, speed_t speed) 148 { 149 150 t->c_ispeed = speed; 151 return (0); 152 } 153 154 int 155 cfsetspeed(struct termios *t, speed_t speed) 156 { 157 158 t->c_ispeed = t->c_ospeed = speed; 159 return (0); 160 } 161 162 /* 163 * Make a pre-existing termios structure into "raw" mode: character-at-a-time 164 * mode with no characters interpreted, 8-bit data path. 165 */ 166 void 167 cfmakeraw(struct termios *t) 168 { 169 170 t->c_iflag &= ~(IMAXBEL|IXOFF|INPCK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IGNPAR); 171 t->c_iflag |= IGNBRK; 172 t->c_oflag &= ~OPOST; 173 t->c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|ICANON|ISIG|IEXTEN|NOFLSH|TOSTOP|PENDIN); 174 t->c_cflag &= ~(CSIZE|PARENB); 175 t->c_cflag |= CS8|CREAD; 176 t->c_cc[VMIN] = 1; 177 t->c_cc[VTIME] = 0; 178 } 179 180 /* 181 * Obtain a termios structure which is similar to the one provided by 182 * the kernel. 183 */ 184 void 185 cfmakesane(struct termios *t) 186 { 187 188 t->c_cflag = TTYDEF_CFLAG; 189 t->c_iflag = TTYDEF_IFLAG; 190 t->c_lflag = TTYDEF_LFLAG; 191 t->c_oflag = TTYDEF_OFLAG; 192 t->c_ispeed = TTYDEF_SPEED; 193 t->c_ospeed = TTYDEF_SPEED; 194 memcpy(&t->c_cc, ttydefchars, sizeof ttydefchars); 195 } 196 197 int 198 tcsendbreak(int fd, int len __unused) 199 { 200 struct timeval sleepytime; 201 202 sleepytime.tv_sec = 0; 203 sleepytime.tv_usec = 400000; 204 if (_ioctl(fd, TIOCSBRK, 0) == -1) 205 return (-1); 206 (void)_select(0, 0, 0, 0, &sleepytime); 207 if (_ioctl(fd, TIOCCBRK, 0) == -1) 208 return (-1); 209 return (0); 210 } 211 212 int 213 __libc_tcdrain(int fd) 214 { 215 216 return (_ioctl(fd, TIOCDRAIN, 0)); 217 } 218 219 #pragma weak tcdrain 220 int 221 tcdrain(int fd) 222 { 223 224 return (((int (*)(int)) 225 __libc_interposing[INTERPOS_tcdrain])(fd)); 226 } 227 228 __weak_reference(__libc_tcdrain, __tcdrain); 229 __weak_reference(__libc_tcdrain, _tcdrain); 230 231 int 232 tcflush(int fd, int which) 233 { 234 int com; 235 236 switch (which) { 237 case TCIFLUSH: 238 com = FREAD; 239 break; 240 case TCOFLUSH: 241 com = FWRITE; 242 break; 243 case TCIOFLUSH: 244 com = FREAD | FWRITE; 245 break; 246 default: 247 errno = EINVAL; 248 return (-1); 249 } 250 return (_ioctl(fd, TIOCFLUSH, &com)); 251 } 252 253 int 254 tcflow(int fd, int action) 255 { 256 struct termios term; 257 u_char c; 258 259 switch (action) { 260 case TCOOFF: 261 return (_ioctl(fd, TIOCSTOP, 0)); 262 case TCOON: 263 return (_ioctl(fd, TIOCSTART, 0)); 264 case TCION: 265 case TCIOFF: 266 if (tcgetattr(fd, &term) == -1) 267 return (-1); 268 c = term.c_cc[action == TCIOFF ? VSTOP : VSTART]; 269 if (c != _POSIX_VDISABLE && _write(fd, &c, sizeof(c)) == -1) 270 return (-1); 271 return (0); 272 default: 273 errno = EINVAL; 274 return (-1); 275 } 276 /* NOTREACHED */ 277 } 278