tty.c revision 1.4
1 /*- 2 * Copyright (c) 1992, 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /* from: static char sccsid[] = "@(#)tty.c 8.2 (Berkeley) 1/2/94"; */ 36 static char *rcsid = "$Id: tty.c,v 1.4 1994/01/24 08:36:59 cgd Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/ioctl.h> 40 41 #include <curses.h> 42 #include <termios.h> 43 #include <unistd.h> 44 45 /* 46 * In general, curses should leave tty hardware settings alone (speed, parity, 47 * word size). This is most easily done in BSD by using TCSASOFT on all 48 * tcsetattr calls. On other systems, it would be better to get and restore 49 * those attributes at each change, or at least when stopped and restarted. 50 * See also the comments in getterm(). 51 */ 52 #ifdef TCSASOFT 53 int __tcaction = 1; /* Ignore hardware settings. */ 54 #else 55 int __tcaction = 0; 56 #endif 57 58 struct termios __orig_termios, __baset; 59 static struct termios cbreakt, rawt, *curt; 60 static int useraw; 61 62 #ifndef OXTABS 63 #ifdef XTABS /* SMI uses XTABS. */ 64 #define OXTABS XTABS 65 #else 66 #define OXTABS 0 67 #endif 68 #endif 69 70 /* 71 * gettmode -- 72 * Do terminal type initialization. 73 */ 74 int 75 gettmode() 76 { 77 useraw = 0; 78 79 if (tcgetattr(STDIN_FILENO, &__orig_termios)) 80 return (ERR); 81 82 __baset = __orig_termios; 83 __baset.c_oflag &= ~OXTABS; 84 85 GT = 0; /* historical. was used before we wired OXTABS off */ 86 NONL = (__baset.c_oflag & ONLCR) == 0; 87 88 /* 89 * XXX 90 * System V and SMI systems overload VMIN and VTIME, such that 91 * VMIN is the same as the VEOF element, and VTIME is the same 92 * as the VEOL element. This means that, if VEOF was ^D, the 93 * default VMIN is 4. Majorly stupid. 94 */ 95 cbreakt = __baset; 96 cbreakt.c_lflag &= ~ICANON; 97 cbreakt.c_cc[VMIN] = 1; 98 cbreakt.c_cc[VTIME] = 0; 99 100 rawt = cbreakt; 101 rawt.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|INLCR|IGNCR|ICRNL|IXON); 102 rawt.c_oflag &= ~OPOST; 103 rawt.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); 104 105 /* 106 * In general, curses should leave hardware-related settings alone. 107 * This includes parity and word size. Older versions set the tty 108 * to 8 bits, no parity in raw(), but this is considered to be an 109 * artifact of the old tty interface. If it's desired to change 110 * parity and word size, the TCSASOFT bit has to be removed from the 111 * calls that switch to/from "raw" mode. 112 */ 113 if (!__tcaction) { 114 rawt.c_iflag &= ~ISTRIP; 115 rawt.c_cflag &= ~(CSIZE|PARENB); 116 rawt.c_cflag |= CS8; 117 } 118 119 curt = &__baset; 120 return (tcsetattr(STDIN_FILENO, __tcaction ? 121 TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); 122 } 123 124 int 125 raw() 126 { 127 useraw = __pfast = __rawmode = 1; 128 curt = &rawt; 129 return (tcsetattr(STDIN_FILENO, __tcaction ? 130 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 131 } 132 133 int 134 noraw() 135 { 136 useraw = __pfast = __rawmode = 0; 137 curt = &__baset; 138 return (tcsetattr(STDIN_FILENO, __tcaction ? 139 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 140 } 141 142 int 143 cbreak() 144 { 145 146 __rawmode = 1; 147 curt = useraw ? &rawt : &cbreakt; 148 return (tcsetattr(STDIN_FILENO, __tcaction ? 149 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 150 } 151 152 int 153 nocbreak() 154 { 155 156 __rawmode = 0; 157 curt = useraw ? &rawt : &__baset; 158 return (tcsetattr(STDIN_FILENO, __tcaction ? 159 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 160 } 161 162 int 163 echo() 164 { 165 rawt.c_lflag |= ECHO; 166 cbreakt.c_lflag |= ECHO; 167 __baset.c_lflag |= ECHO; 168 169 __echoit = 1; 170 return (tcsetattr(STDIN_FILENO, __tcaction ? 171 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 172 } 173 174 int 175 noecho() 176 { 177 rawt.c_lflag &= ~ECHO; 178 cbreakt.c_lflag &= ~ECHO; 179 __baset.c_lflag &= ~ECHO; 180 181 __echoit = 0; 182 return (tcsetattr(STDIN_FILENO, __tcaction ? 183 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 184 } 185 186 int 187 nl() 188 { 189 rawt.c_iflag |= ICRNL; 190 rawt.c_oflag |= ONLCR; 191 cbreakt.c_iflag |= ICRNL; 192 cbreakt.c_oflag |= ONLCR; 193 __baset.c_iflag |= ICRNL; 194 __baset.c_oflag |= ONLCR; 195 196 __pfast = __rawmode; 197 return (tcsetattr(STDIN_FILENO, __tcaction ? 198 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 199 } 200 201 int 202 nonl() 203 { 204 rawt.c_iflag &= ~ICRNL; 205 rawt.c_oflag &= ~ONLCR; 206 cbreakt.c_iflag &= ~ICRNL; 207 cbreakt.c_oflag &= ~ONLCR; 208 __baset.c_iflag &= ~ICRNL; 209 __baset.c_oflag &= ~ONLCR; 210 211 __pfast = 1; 212 return (tcsetattr(STDIN_FILENO, __tcaction ? 213 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 214 } 215 216 void 217 __startwin() 218 { 219 (void)fflush(stdout); 220 (void)setvbuf(stdout, NULL, _IOFBF, 0); 221 222 tputs(TI, 0, __cputchar); 223 tputs(VS, 0, __cputchar); 224 } 225 226 int 227 endwin() 228 { 229 __restore_stophandler(); 230 231 if (curscr != NULL) { 232 if (curscr->flags & __WSTANDOUT) { 233 tputs(SE, 0, __cputchar); 234 curscr->flags &= ~__WSTANDOUT; 235 } 236 __mvcur(curscr->cury, curscr->cury, curscr->maxy - 1, 0, 0); 237 } 238 239 (void)tputs(VE, 0, __cputchar); 240 (void)tputs(TE, 0, __cputchar); 241 (void)fflush(stdout); 242 (void)setvbuf(stdout, NULL, _IOLBF, 0); 243 244 return (tcsetattr(STDIN_FILENO, __tcaction ? 245 TCSASOFT | TCSADRAIN : TCSADRAIN, &__orig_termios)); 246 } 247 248 /* 249 * The following routines, savetty and resetty are completely useless and 250 * are left in only as stubs. If people actually use them they will almost 251 * certainly screw up the state of the world. 252 */ 253 static struct termios savedtty; 254 int 255 savetty() 256 { 257 return (tcgetattr(STDIN_FILENO, &savedtty)); 258 } 259 260 int 261 resetty() 262 { 263 return (tcsetattr(STDIN_FILENO, __tcaction ? 264 TCSASOFT | TCSADRAIN : TCSADRAIN, &savedtty)); 265 } 266
Indexes created Tue Sep 23 21:09:50 GMT 2025