1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)tty.c 8.3 (Berkeley) 05/04/94"; 10 #endif /* not lint */ 11 12 #include <termios.h> 13 #include <unistd.h> 14 15 #include "curses.h" 16 17 /* 18 * In general, curses should leave tty hardware settings alone (speed, parity, 19 * word size). This is most easily done in BSD by using TCSASOFT on all 20 * tcsetattr calls. On other systems, it would be better to get and restore 21 * those attributes at each change, or at least when stopped and restarted. 22 * See also the comments in getterm(). 23 */ 24 #ifdef TCSASOFT 25 int __tcaction = 1; /* Ignore hardware settings. */ 26 #else 27 int __tcaction = 0; 28 #endif 29 30 struct termios __orig_termios, __baset; 31 static struct termios cbreakt, rawt, *curt; 32 static int useraw; 33 34 #ifndef OXTABS 35 #ifdef XTABS /* SMI uses XTABS. */ 36 #define OXTABS XTABS 37 #else 38 #define OXTABS 0 39 #endif 40 #endif 41 42 /* 43 * gettmode -- 44 * Do terminal type initialization. 45 */ 46 int 47 gettmode() 48 { 49 useraw = 0; 50 51 if (tcgetattr(STDIN_FILENO, &__orig_termios)) 52 return (ERR); 53 54 __baset = __orig_termios; 55 __baset.c_oflag &= ~OXTABS; 56 57 GT = 0; /* historical. was used before we wired OXTABS off */ 58 NONL = (__baset.c_oflag & ONLCR) == 0; 59 60 /* 61 * XXX 62 * System V and SMI systems overload VMIN and VTIME, such that 63 * VMIN is the same as the VEOF element, and VTIME is the same 64 * as the VEOL element. This means that, if VEOF was ^D, the 65 * default VMIN is 4. Majorly stupid. 66 */ 67 cbreakt = __baset; 68 cbreakt.c_lflag &= ~ICANON; 69 cbreakt.c_cc[VMIN] = 1; 70 cbreakt.c_cc[VTIME] = 0; 71 72 rawt = cbreakt; 73 rawt.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|INLCR|IGNCR|ICRNL|IXON); 74 rawt.c_oflag &= ~OPOST; 75 rawt.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); 76 77 /* 78 * In general, curses should leave hardware-related settings alone. 79 * This includes parity and word size. Older versions set the tty 80 * to 8 bits, no parity in raw(), but this is considered to be an 81 * artifact of the old tty interface. If it's desired to change 82 * parity and word size, the TCSASOFT bit has to be removed from the 83 * calls that switch to/from "raw" mode. 84 */ 85 if (!__tcaction) { 86 rawt.c_iflag &= ~ISTRIP; 87 rawt.c_cflag &= ~(CSIZE|PARENB); 88 rawt.c_cflag |= CS8; 89 } 90 91 curt = &__baset; 92 return (tcsetattr(STDIN_FILENO, __tcaction ? 93 TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK); 94 } 95 96 int 97 raw() 98 { 99 useraw = __pfast = __rawmode = 1; 100 curt = &rawt; 101 return (tcsetattr(STDIN_FILENO, __tcaction ? 102 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 103 } 104 105 int 106 noraw() 107 { 108 useraw = __pfast = __rawmode = 0; 109 curt = &__baset; 110 return (tcsetattr(STDIN_FILENO, __tcaction ? 111 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 112 } 113 114 int 115 cbreak() 116 { 117 118 __rawmode = 1; 119 curt = useraw ? &rawt : &cbreakt; 120 return (tcsetattr(STDIN_FILENO, __tcaction ? 121 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 122 } 123 124 int 125 nocbreak() 126 { 127 128 __rawmode = 0; 129 curt = useraw ? &rawt : &__baset; 130 return (tcsetattr(STDIN_FILENO, __tcaction ? 131 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 132 } 133 134 int 135 echo() 136 { 137 rawt.c_lflag |= ECHO; 138 cbreakt.c_lflag |= ECHO; 139 __baset.c_lflag |= ECHO; 140 141 __echoit = 1; 142 return (tcsetattr(STDIN_FILENO, __tcaction ? 143 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 144 } 145 146 int 147 noecho() 148 { 149 rawt.c_lflag &= ~ECHO; 150 cbreakt.c_lflag &= ~ECHO; 151 __baset.c_lflag &= ~ECHO; 152 153 __echoit = 0; 154 return (tcsetattr(STDIN_FILENO, __tcaction ? 155 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 156 } 157 158 int 159 nl() 160 { 161 rawt.c_iflag |= ICRNL; 162 rawt.c_oflag |= ONLCR; 163 cbreakt.c_iflag |= ICRNL; 164 cbreakt.c_oflag |= ONLCR; 165 __baset.c_iflag |= ICRNL; 166 __baset.c_oflag |= ONLCR; 167 168 __pfast = __rawmode; 169 return (tcsetattr(STDIN_FILENO, __tcaction ? 170 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 171 } 172 173 int 174 nonl() 175 { 176 rawt.c_iflag &= ~ICRNL; 177 rawt.c_oflag &= ~ONLCR; 178 cbreakt.c_iflag &= ~ICRNL; 179 cbreakt.c_oflag &= ~ONLCR; 180 __baset.c_iflag &= ~ICRNL; 181 __baset.c_oflag &= ~ONLCR; 182 183 __pfast = 1; 184 return (tcsetattr(STDIN_FILENO, __tcaction ? 185 TCSASOFT | TCSADRAIN : TCSADRAIN, curt)); 186 } 187 188 void 189 __startwin() 190 { 191 (void)fflush(stdout); 192 (void)setvbuf(stdout, NULL, _IOFBF, 0); 193 194 tputs(TI, 0, __cputchar); 195 tputs(VS, 0, __cputchar); 196 } 197 198 int 199 endwin() 200 { 201 __restore_stophandler(); 202 203 if (curscr != NULL) { 204 if (curscr->flags & __WSTANDOUT) { 205 tputs(SE, 0, __cputchar); 206 curscr->flags &= ~__WSTANDOUT; 207 } 208 __mvcur(curscr->cury, curscr->cury, curscr->maxy - 1, 0, 0); 209 } 210 211 (void)tputs(VE, 0, __cputchar); 212 (void)tputs(TE, 0, __cputchar); 213 (void)fflush(stdout); 214 (void)setvbuf(stdout, NULL, _IOLBF, 0); 215 216 return (tcsetattr(STDIN_FILENO, __tcaction ? 217 TCSASOFT | TCSADRAIN : TCSADRAIN, &__orig_termios)); 218 } 219 220 /* 221 * The following routines, savetty and resetty are completely useless and 222 * are left in only as stubs. If people actually use them they will almost 223 * certainly screw up the state of the world. 224 */ 225 static struct termios savedtty; 226 int 227 savetty() 228 { 229 return (tcgetattr(STDIN_FILENO, &savedtty)); 230 } 231 232 int 233 resetty() 234 { 235 return (tcsetattr(STDIN_FILENO, __tcaction ? 236 TCSASOFT | TCSADRAIN : TCSADRAIN, &savedtty)); 237 } 238