1 /* $NetBSD: setterm.c,v 1.39 2004/07/24 13:10:47 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 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 <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94"; 36 #else 37 __RCSID("$NetBSD: setterm.c,v 1.39 2004/07/24 13:10:47 blymn Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */ 42 43 #include <stdlib.h> 44 #include <string.h> 45 #include <termios.h> 46 #include <unistd.h> 47 48 #include "curses.h" 49 #include "curses_private.h" 50 51 static int zap(SCREEN *screen); 52 53 static int does_esc_m(char *cap); 54 static int does_ctrl_o(char *cap); 55 56 static char *sflags[] = { 57 /* am bs cc da eo */ 58 &__tc_am, &__tc_bs, &__tc_cc, &__tc_da, &__tc_eo, 59 /* hc hl in mi ms */ 60 &__tc_hc, &__tc_hl, &__tc_in, &__tc_mi, &__tc_ms, 61 /* nc ns os ul ut */ 62 &__tc_nc, &__tc_ns, &__tc_os, &__tc_ul, &__tc_ut, 63 /* xb xn xt xs xx */ 64 &__tc_xb, &__tc_xn, &__tc_xt, &__tc_xs, &__tc_xx 65 }; 66 67 static int *svals[] = { 68 /* pa Co NC */ 69 &__tc_pa, &__tc_Co, &__tc_NC 70 }; 71 72 static char *_PC, 73 **sstrs[] = { 74 /* AB ac ae AF AL */ 75 &__tc_AB, &__tc_ac, &__tc_ae, &__tc_AF, &__tc_AL, 76 /* al as bc bl bt */ 77 &__tc_al, &__tc_as, &__tc_bc, &__tc_bl, &__tc_bt, 78 /* cd ce cl cm cr */ 79 &__tc_cd, &__tc_ce, &__tc_cl, &__tc_cm, &__tc_cr, 80 /* cs dc DL dl dm */ 81 &__tc_cs, &__tc_dc, &__tc_DL, &__tc_dl, &__tc_dm, 82 /* DO do eA ed ei */ 83 &__tc_DO, &__tc_do, &__tc_eA, &__tc_ed, &__tc_ei, 84 /* ho Ic ic im Ip */ 85 &__tc_ho, &__tc_Ic, &__tc_ic, &__tc_im, &__tc_Ip, 86 /* ip k0 k1 k2 k3 */ 87 &__tc_ip, &__tc_k0, &__tc_k1, &__tc_k2, &__tc_k3, 88 /* k4 k5 k6 k7 k8 */ 89 &__tc_k4, &__tc_k5, &__tc_k6, &__tc_k7, &__tc_k8, 90 /* k9 kd ke kh kl */ 91 &__tc_k9, &__tc_kd, &__tc_ke, &__tc_kh, &__tc_kl, 92 /* kr ks ku LE ll */ 93 &__tc_kr, &__tc_ks, &__tc_ku, &__tc_LE, &__tc_ll, 94 /* ma mb md me mh */ 95 &__tc_ma, &__tc_mb, &__tc_md, &__tc_me, &__tc_mh, 96 /* mk mm mo mp mr */ 97 &__tc_mk, &__tc_mm, &__tc_mo, &__tc_mp, &__tc_mr, 98 /* nd nl oc op pc */ 99 &__tc_nd, &__tc_nl, &__tc_oc, &__tc_op, &_PC, 100 /* rc RI sc Sb se */ 101 &__tc_rc, &__tc_RI, &__tc_Sb, &__tc_sc, &__tc_se, 102 /* SF Sf sf so sp */ 103 &__tc_SF, &__tc_Sf, &__tc_sf, &__tc_so, &__tc_sp, 104 /* SR sr ta te ti */ 105 &__tc_SR, &__tc_sr, &__tc_ta, &__tc_te, &__tc_ti, 106 /* uc ue UP up us */ 107 &__tc_uc, &__tc_ue, &__tc_UP, &__tc_up, &__tc_us, 108 /* vb ve vi vs */ 109 &__tc_vb, &__tc_ve, &__tc_vi, &__tc_vs 110 }; 111 112 attr_t __mask_op, __mask_me, __mask_ue, __mask_se; 113 114 int 115 setterm(char *type) 116 { 117 return _cursesi_setterm(type, _cursesi_screen); 118 } 119 120 int 121 _cursesi_setterm(char *type, SCREEN *screen) 122 { 123 int unknown; 124 struct winsize win; 125 char *p; 126 char cm_buff[64]; 127 128 if (type[0] == '\0') 129 type = "xx"; 130 unknown = 0; 131 if (t_getent(&screen->cursesi_genbuf, type) != 1) { 132 unknown++; 133 } 134 #ifdef DEBUG 135 __CTRACE("setterm: tty = %s\n", type); 136 #endif 137 138 /* Try TIOCGWINSZ, and, if it fails, the termcap entry. */ 139 if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 && 140 win.ws_row != 0 && win.ws_col != 0) { 141 screen->LINES = win.ws_row; 142 screen->COLS = win.ws_col; 143 } else { 144 if (unknown) { 145 screen->LINES = -1; 146 screen->COLS = -1; 147 } else { 148 screen->LINES = t_getnum(screen->cursesi_genbuf, "li"); 149 screen->COLS = t_getnum(screen->cursesi_genbuf, "co"); 150 } 151 152 } 153 154 /* POSIX 1003.2 requires that the environment override. */ 155 if ((p = getenv("LINES")) != NULL) 156 screen->LINES = (int) strtol(p, NULL, 10); 157 if ((p = getenv("COLUMNS")) != NULL) 158 screen->COLS = (int) strtol(p, NULL, 10); 159 160 /* 161 * Want cols > 4, otherwise things will fail. 162 */ 163 if (screen->COLS <= 4) 164 return (ERR); 165 166 LINES = screen->LINES; 167 COLS = screen->COLS; 168 169 #ifdef DEBUG 170 __CTRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS); 171 #endif 172 if (!unknown) { 173 if (zap(screen) == ERR) /* Get terminal description.*/ 174 return ERR; 175 } 176 177 /* If we can't tab, we can't backtab, either. */ 178 if (!screen->GT) 179 screen->tc_bt = NULL; 180 181 /* 182 * Test for cursor motion capability. 183 * 184 */ 185 if (t_goto(NULL, screen->tc_cm, 0, 0, cm_buff, sizeof(cm_buff) - 1) < 0) { 186 screen->CA = 0; 187 screen->tc_cm = 0; 188 } else 189 screen->CA = 1; 190 191 /* 192 * set the pad char, only take the first char of the pc capability 193 * as this is all we can use. 194 */ 195 screen->pad_char = screen->tc_pc ? screen->tc_pc[0] : 0; 196 197 /* Get full name of terminal */ 198 if (unknown) { 199 strcpy(screen->ttytype, "dumb"); 200 } else { 201 char *tcptr; 202 size_t limit = 0; 203 if (t_getterm(screen->cursesi_genbuf, 0, &limit)) 204 return ERR; 205 if ((tcptr = malloc(limit + 1)) == NULL) 206 return ERR; 207 if (t_getterm(screen->cursesi_genbuf, &tcptr, 0) < 0) 208 return ERR; 209 __longname(tcptr, screen->ttytype); 210 free(tcptr); 211 } 212 213 /* If no scrolling commands, no quick change. */ 214 screen->noqch = 215 (screen->tc_cs == NULL || screen->tc_ho == NULL || 216 (screen->tc_SF == NULL && screen->tc_sf == NULL) || 217 (screen->tc_SR == NULL && screen->tc_sr == NULL)) && 218 ((screen->tc_AL == NULL && screen->tc_al == NULL) || 219 (screen->tc_DL == NULL && screen->tc_dl == NULL)); 220 221 /* 222 * Precalculate conflict info for color/attribute end commands. 223 */ 224 screen->mask_op = __ATTRIBUTES & ~__COLOR; 225 if (screen->tc_op != NULL) { 226 if (does_esc_m(screen->tc_op)) 227 screen->mask_op &= 228 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 229 else { 230 if (screen->tc_se != NULL && 231 !strcmp(screen->tc_op, screen->tc_se)) 232 screen->mask_op &= ~__STANDOUT; 233 if (screen->tc_ue != NULL && 234 !strcmp(screen->tc_op, screen->tc_ue)) 235 screen->mask_op &= ~__UNDERSCORE; 236 if (screen->tc_me != NULL && 237 !strcmp(screen->tc_op, screen->tc_me)) 238 screen->mask_op &= ~__TERMATTR; 239 } 240 } 241 /* 242 * Assume that "me" turns off all attributes apart from ACS. 243 * It might turn off ACS, so check for that. 244 */ 245 if (screen->tc_me != NULL && does_ctrl_o(screen->tc_me)) 246 screen->mask_me = 0; 247 else 248 screen->mask_me = __ALTCHARSET; 249 250 /* Check what turning off the attributes also turns off */ 251 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 252 if (screen->tc_ue != NULL) { 253 if (does_esc_m(screen->tc_ue)) 254 screen->mask_ue &= 255 ~(__STANDOUT | __TERMATTR | __COLOR); 256 else { 257 if (screen->tc_se != NULL && 258 !strcmp(screen->tc_ue, screen->tc_se)) 259 screen->mask_ue &= ~__STANDOUT; 260 if (screen->tc_me != NULL && 261 !strcmp(screen->tc_ue, screen->tc_me)) 262 screen->mask_ue &= ~__TERMATTR; 263 if (screen->tc_op != NULL && 264 !strcmp(screen->tc_ue, screen->tc_op)) 265 screen->mask_ue &= ~__COLOR; 266 } 267 } 268 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 269 if (screen->tc_se != NULL) { 270 if (does_esc_m(screen->tc_se)) 271 screen->mask_se &= 272 ~(__UNDERSCORE | __TERMATTR | __COLOR); 273 else { 274 if (screen->tc_ue != NULL && 275 !strcmp(screen->tc_se, screen->tc_ue)) 276 screen->mask_se &= ~__UNDERSCORE; 277 if (screen->tc_me != NULL && 278 !strcmp(screen->tc_se, screen->tc_me)) 279 screen->mask_se &= ~__TERMATTR; 280 if (screen->tc_op != NULL && 281 !strcmp(screen->tc_se, screen->tc_op)) 282 screen->mask_se &= ~__COLOR; 283 } 284 } 285 286 return (unknown ? ERR : OK); 287 } 288 289 /* 290 * _cursesi_resetterm -- 291 * Copy the terminal instance data for the given screen to the global 292 * variables. 293 */ 294 void 295 _cursesi_resetterm(SCREEN *screen) 296 { 297 char ***sp, **scr_sp; 298 int **vp, *scr_vp, i; 299 char **fp, *scr_fp; 300 301 LINES = screen->LINES; 302 COLS = screen->COLS; 303 304 /* reset terminal capabilities */ 305 fp = sflags; 306 scr_fp = &screen->tc_am; 307 for (i = 0; i < screen->flag_count; i++) 308 *(*fp++) = *scr_fp++; 309 310 vp = svals; 311 scr_vp = &screen->tc_pa; 312 for (i = 0; i < screen->int_count; i++) 313 *(*vp++) = *scr_vp++; 314 315 sp = sstrs; 316 scr_sp = &screen->tc_AB; 317 for (i = 0; i < screen->str_count; i++) 318 *(*sp++) = *scr_sp++; 319 320 __GT = screen->GT; 321 __CA = screen->CA; 322 323 PC = screen->pad_char; 324 325 __noqch = screen->noqch; 326 __mask_op = screen->mask_op; 327 __mask_me = screen->mask_me; 328 __mask_ue = screen->mask_ue; 329 __mask_se = screen->mask_se; 330 } 331 332 /* 333 * zap -- 334 * Gets all the terminal flags from the termcap database. 335 */ 336 static int 337 zap(SCREEN *screen) 338 { 339 const char *nampstr, *namp; 340 char **sp; 341 int *vp; 342 char *fp; 343 char tmp[3]; 344 #ifdef DEBUG 345 char *cp; 346 #endif 347 tmp[2] = '\0'; 348 349 namp = "ambsccdaeohchlinmimsncnsosulutxbxnxtxsxx"; 350 fp = &screen->tc_am; 351 screen->flag_count = 0; 352 do { 353 *tmp = *namp; 354 *(tmp + 1) = *(namp + 1); 355 *fp++ = t_getflag(screen->cursesi_genbuf, tmp); 356 #ifdef DEBUG 357 __CTRACE("%2.2s = %s\n", namp, fp[-1] ? "TRUE" : "FALSE"); 358 #endif 359 namp += 2; 360 screen->flag_count++; 361 } while (*namp); 362 namp = "paCoNC"; 363 vp = &screen->tc_pa; 364 screen->int_count = 0; 365 do { 366 *tmp = *namp; 367 *(tmp + 1) = *(namp + 1); 368 *vp++ = t_getnum(screen->cursesi_genbuf, tmp); 369 #ifdef DEBUG 370 __CTRACE("%2.2s = %d\n", namp, vp[-1]); 371 #endif 372 namp += 2; 373 screen->int_count++; 374 } while (*namp); 375 376 nampstr = "ABacaeAFALalasbcblbtcdceclcmcrcsdcDLdldmDOdoeAedeihoIcicimIpipk0k1k2k3k4k5k6k7k8k9kdkekhklkrkskuLEllmambmdmemhmkmmmompmrndnlocoppcrcRISbscseSFSfsfsospSRsrtatetiucueUPupusvbvevivs"; 377 378 namp = nampstr; 379 sp = &screen->tc_AB; 380 screen->str_count = 0; 381 do { 382 *tmp = *namp; 383 *(tmp + 1) = *(namp + 1); 384 *sp++ = t_agetstr(screen->cursesi_genbuf, tmp); 385 #ifdef DEBUG 386 __CTRACE("%2.2s = %s", namp, sp[-1] == NULL ? "NULL\n" : "\""); 387 if (sp[-1] != NULL) { 388 for (cp = sp[-1]; *cp; cp++) 389 __CTRACE("%s", unctrl(*cp)); 390 __CTRACE("\"\n"); 391 } 392 #endif 393 namp += 2; 394 screen->str_count++; 395 } while (*namp); 396 if (screen->tc_xs) 397 screen->tc_so = screen->tc_se = NULL; 398 else { 399 if (t_getnum(screen->cursesi_genbuf, "sg") > 0) 400 screen->tc_so = NULL; 401 if (t_getnum(screen->cursesi_genbuf, "ug") > 0) 402 screen->tc_us = NULL; 403 if (!screen->tc_so && screen->tc_us) { 404 screen->tc_so = screen->tc_us; 405 screen->tc_se = screen->tc_ue; 406 } 407 } 408 409 return OK; 410 } 411 412 /* 413 * getcap -- 414 * Return a capability from termcap. 415 */ 416 char * 417 getcap(char *name) 418 { 419 return (t_agetstr(_cursesi_screen->cursesi_genbuf, name)); 420 } 421 422 /* 423 * does_esc_m -- 424 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 425 * other attributes, so we check for this in the capability passed to us. 426 * Note that we can't just do simple string comparison, as the capability 427 * may contain multiple, ';' separated sequence parts. 428 */ 429 static int 430 does_esc_m(char *cap) 431 { 432 #define WAITING 0 433 #define PARSING 1 434 #define NUMBER 2 435 #define FOUND 4 436 char *capptr; 437 int seq; 438 439 #ifdef DEBUG 440 __CTRACE("does_esc_m: Checking %s\n", cap); 441 #endif 442 /* Is it just "\E[m" or "\E[0m"? */ 443 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 444 return 1; 445 446 /* Does it contain a "\E[...m" sequence? */ 447 if (strlen(cap) < 4) 448 return 0; 449 capptr = cap; 450 seq = WAITING; 451 while (*capptr != 0) { 452 switch (seq) { 453 /* Start of sequence */ 454 case WAITING: 455 if (!strncmp(capptr, "\x1b[", 2)) { 456 capptr+=2; 457 if (*capptr == 'm') 458 return 1; 459 else { 460 seq=PARSING; 461 continue; 462 } 463 } 464 break; 465 /* Looking for '0' */ 466 case PARSING: 467 if (*capptr == '0') 468 seq=FOUND; 469 else if (*capptr > '0' && *capptr <= '9') 470 seq=NUMBER; 471 else if (*capptr != ';') 472 seq=WAITING; 473 break; 474 /* Some other number */ 475 case NUMBER: 476 if (*capptr == ';') 477 seq=PARSING; 478 else if (!(*capptr >= '0' && *capptr <= '9')) 479 seq=WAITING; 480 break; 481 /* Found a '0' */ 482 case FOUND: 483 if (*capptr == 'm') 484 return 1; 485 else if (!((*capptr >= '0' && *capptr <= '9') || 486 *capptr == ';')) 487 seq=WAITING; 488 break; 489 default: 490 break; 491 } 492 capptr++; 493 } 494 return 0; 495 } 496 497 /* 498 * does_ctrl_o -- 499 * A hack for vt100/xterm-like terminals where the "me" capability also 500 * unsets acs (i.e. it contains the character '\017'). 501 */ 502 static int 503 does_ctrl_o(char *cap) 504 { 505 char *capptr = cap; 506 507 #ifdef DEBUG 508 __CTRACE("does_ctrl_o: Looping on %s\n", capptr); 509 #endif 510 while (*capptr != 0) { 511 if (*capptr == '\x0f') 512 return 1; 513 capptr++; 514 } 515 return 0; 516 } 517