1 /*- 2 * Copyright (c) 1991, 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 * @(#)set.c 8.2 (Berkeley) 2/28/94 34 * $FreeBSD: src/usr.bin/tset/set.c,v 1.7.2.1 2000/11/12 07:48:29 dg Exp $ 35 * $DragonFly: src/usr.bin/tset/set.c,v 1.3 2003/10/04 20:36:53 hmp Exp $ 36 */ 37 38 #include <termios.h> 39 #include <unistd.h> 40 #include <stdio.h> 41 #include "extern.h" 42 43 #define CHK(val, dft) (val <= 0 ? dft : val) 44 45 int set_tabs(void); 46 47 /* 48 * Reset the terminal mode bits to a sensible state. Very useful after 49 * a child program dies in raw mode. 50 */ 51 void 52 reset_mode(void) 53 { 54 tcgetattr(STDERR_FILENO, &mode); 55 56 #if defined(VDISCARD) && defined(CDISCARD) 57 mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD); 58 #endif 59 mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF); 60 mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE); 61 #if defined(VFLUSH) && defined(CFLUSH) 62 mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH); 63 #endif 64 mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR); 65 mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL); 66 #if defined(VLNEXT) && defined(CLNEXT) 67 mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT); 68 #endif 69 mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT); 70 #if defined(VREPRINT) && defined(CRPRNT) 71 mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT); 72 #endif 73 mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART); 74 mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP); 75 mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP); 76 #if defined(VWERASE) && defined(CWERASE) 77 mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE); 78 #endif 79 80 mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR 81 #ifdef IUCLC 82 | IUCLC 83 #endif 84 #ifdef IXANY 85 | IXANY 86 #endif 87 | IXOFF); 88 89 mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON 90 #ifdef IMAXBEL 91 | IMAXBEL 92 #endif 93 ); 94 95 mode.c_oflag &= ~(0 96 #ifdef OLCUC 97 | OLCUC 98 #endif 99 #ifdef OCRNL 100 | OCRNL 101 #endif 102 #ifdef ONOCR 103 | ONOCR 104 #endif 105 #ifdef ONLRET 106 | ONLRET 107 #endif 108 #ifdef OFILL 109 | OFILL 110 #endif 111 #ifdef OFDEL 112 | OFDEL 113 #endif 114 #ifdef NLDLY 115 | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY 116 #endif 117 ); 118 119 mode.c_oflag |= (OPOST 120 #ifdef ONLCR 121 | ONLCR 122 #endif 123 ); 124 125 mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | CLOCAL); 126 mode.c_cflag |= (CS8 | CREAD); 127 mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP 128 #ifdef ECHOPTR 129 | ECHOPRT 130 #endif 131 #ifdef XCASE 132 | XCASE 133 #endif 134 ); 135 136 mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK 137 #ifdef ECHOCTL 138 | ECHOCTL 139 #endif 140 #ifdef ECHOKE 141 | ECHOKE 142 #endif 143 ); 144 145 tcsetattr(STDERR_FILENO, TCSADRAIN, &mode); 146 } 147 148 /* 149 * Determine the erase, interrupt, and kill characters from the termcap 150 * entry and command line and update their values in 'mode'. 151 */ 152 void 153 set_control_chars(void) 154 { 155 char *bp, *p, bs_char, buf[1024]; 156 157 bp = buf; 158 p = tgetstr("kb", &bp); 159 if (p == NULL || p[1] != '\0') 160 p = tgetstr("bc", &bp); 161 if (p != NULL && p[1] == '\0') 162 bs_char = p[0]; 163 else if (tgetflag("bs")) 164 bs_char = CTRL('h'); 165 else 166 bs_char = 0; 167 168 if (erasech == 0 && bs_char != 0 && !tgetflag("os")) 169 erasech = -1; 170 if (erasech < 0) 171 erasech = (bs_char != 0) ? bs_char : CTRL('h'); 172 173 if (mode.c_cc[VERASE] == 0 || erasech != 0) 174 mode.c_cc[VERASE] = erasech ? erasech : CERASE; 175 176 if (mode.c_cc[VINTR] == 0 || intrchar != 0) 177 mode.c_cc[VINTR] = intrchar ? intrchar : CINTR; 178 179 if (mode.c_cc[VKILL] == 0 || killch != 0) 180 mode.c_cc[VKILL] = killch ? killch : CKILL; 181 } 182 183 /* 184 * Set up various conversions in 'mode', including parity, tabs, returns, 185 * echo, and case, according to the termcap entry. If the program we're 186 * running was named with a leading upper-case character, map external 187 * uppercase to internal lowercase. 188 */ 189 void 190 set_conversions(int usingupper) 191 { 192 if (tgetflag("UC") || usingupper) { 193 #ifdef IUCLC 194 mode.c_iflag |= IUCLC; 195 mode.c_oflag |= OLCUC; 196 #endif 197 } else if (tgetflag("LC")) { 198 #ifdef IUCLC 199 mode.c_iflag &= ~IUCLC; 200 mode.c_oflag &= ~OLCUC; 201 #endif 202 } 203 mode.c_iflag &= ~(PARMRK | INPCK); 204 mode.c_lflag |= ICANON; 205 if (tgetflag("EP")) { 206 mode.c_cflag |= PARENB; 207 mode.c_cflag &= ~PARODD; 208 } 209 if (tgetflag("OP")) { 210 mode.c_cflag |= PARENB; 211 mode.c_cflag |= PARODD; 212 } 213 214 #ifdef ONLCR 215 mode.c_oflag |= ONLCR; 216 #endif 217 mode.c_iflag |= ICRNL; 218 mode.c_lflag |= ECHO; 219 mode.c_oflag |= OXTABS; 220 if (tgetflag("NL")) { /* Newline, not linefeed. */ 221 #ifdef ONLCR 222 mode.c_oflag &= ~ONLCR; 223 #endif 224 mode.c_iflag &= ~ICRNL; 225 } 226 if (tgetflag("HD")) /* Half duplex. */ 227 mode.c_lflag &= ~ECHO; 228 if (tgetflag("pt")) /* Print tabs. */ 229 mode.c_oflag &= ~OXTABS; 230 mode.c_lflag |= (ECHOE | ECHOK); 231 } 232 233 /* Output startup string. */ 234 void 235 set_init(void) 236 { 237 char *bp, buf[1024]; 238 int settle; 239 240 bp = buf; 241 if (tgetstr("pc", &bp) != 0) /* Get/set pad character. */ 242 PC = buf[0]; 243 244 #ifdef TAB3 245 if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) { 246 oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET); 247 tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode); 248 } 249 #endif 250 settle = set_tabs(); 251 252 if (isreset) { 253 bp = buf; 254 if (tgetstr("rs", &bp) != 0 || tgetstr("is", &bp) != 0) { 255 tputs(buf, 0, outc); 256 settle = 1; 257 } 258 bp = buf; 259 if (tgetstr("rf", &bp) != 0 || tgetstr("if", &bp) != 0) { 260 cat(buf); 261 settle = 1; 262 } 263 } 264 265 if (settle) { 266 (void)putc('\r', stderr); 267 (void)fflush(stderr); 268 (void)sleep(1); /* Settle the terminal. */ 269 } 270 } 271 272 /* 273 * Set the hardware tabs on the terminal, using the ct (clear all tabs), 274 * st (set one tab) and ch (horizontal cursor addressing) capabilities. 275 * This is done before if and is, so they can patch in case we blow this. 276 * Return nonzero if we set any tab stops, zero if not. 277 */ 278 int 279 set_tabs(void) 280 { 281 int c; 282 char *capsp, *clear_tabs; 283 char *set_column, *set_pos, *Set_tab, *tg_out; 284 char caps[1024]; 285 286 capsp = caps; 287 Set_tab = tgetstr("st", &capsp); 288 289 if (Set_tab && (clear_tabs = tgetstr("ct", &capsp))) { 290 (void)putc('\r', stderr); /* Force to left margin. */ 291 tputs(clear_tabs, 0, outc); 292 } 293 294 set_column = tgetstr("ch", &capsp); 295 set_pos = set_column ? NULL : tgetstr("cm", &capsp); 296 297 if (Set_tab) { 298 for (c = 8; c < Columns; c += 8) { 299 /* 300 * Get to the right column. "OOPS" is returned by 301 * tgoto() if it can't do the job. (*snarl*) 302 */ 303 tg_out = "OOPS"; 304 if (set_column) 305 tg_out = tgoto(set_column, 0, c); 306 if (*tg_out == 'O' && set_pos) 307 tg_out = tgoto(set_pos, c, Lines - 1); 308 if (*tg_out != 'O') 309 tputs(tg_out, 1, outc); 310 else 311 (void)fprintf(stderr, "%s", " "); 312 /* Set the tab. */ 313 tputs(Set_tab, 0, outc); 314 } 315 putc('\r', stderr); 316 return (1); 317 } 318 return (0); 319 } 320