1 /* $NetBSD: setterm.c,v 1.43 2007/10/06 20:14:41 martin 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 1.43 2007/10/06 20:14:41 martin 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 #ifndef HAVE_WCHAR 109 /* vb ve vi vs */ 110 &__tc_vb, &__tc_ve, &__tc_vi, &__tc_vs 111 #else 112 /* vb ve vi vs Xh */ 113 &__tc_vb, &__tc_ve, &__tc_vi, &__tc_vs, &__tc_Xh, 114 /* Xl Xo Xr Xt Xv */ 115 &__tc_Xl, &__tc_Xo, &__tc_Xr, &__tc_Xt, &__tc_Xv 116 #endif /* HAVE_WCHAR */ 117 }; 118 119 attr_t __mask_op, __mask_me, __mask_ue, __mask_se; 120 121 int 122 setterm(char *type) 123 { 124 return _cursesi_setterm(type, _cursesi_screen); 125 } 126 127 int 128 _cursesi_setterm(char *type, SCREEN *screen) 129 { 130 int unknown; 131 struct winsize win; 132 char *p; 133 char cm_buff[64]; 134 135 if (type[0] == '\0') 136 type = "xx"; 137 unknown = 0; 138 if (t_getent(&screen->cursesi_genbuf, type) != 1) { 139 unknown++; 140 } 141 #ifdef DEBUG 142 __CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type); 143 #endif 144 145 /* Try TIOCGWINSZ, and, if it fails, the termcap entry. */ 146 if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 && 147 win.ws_row != 0 && win.ws_col != 0) { 148 screen->LINES = win.ws_row; 149 screen->COLS = win.ws_col; 150 } else { 151 if (unknown) { 152 screen->LINES = -1; 153 screen->COLS = -1; 154 } else { 155 screen->LINES = t_getnum(screen->cursesi_genbuf, "li"); 156 screen->COLS = t_getnum(screen->cursesi_genbuf, "co"); 157 } 158 159 } 160 161 /* POSIX 1003.2 requires that the environment override. */ 162 if ((p = getenv("LINES")) != NULL) 163 screen->LINES = (int) strtol(p, NULL, 10); 164 if ((p = getenv("COLUMNS")) != NULL) 165 screen->COLS = (int) strtol(p, NULL, 10); 166 167 /* 168 * Want cols > 4, otherwise things will fail. 169 */ 170 if (screen->COLS <= 4) 171 return (ERR); 172 173 LINES = screen->LINES; 174 COLS = screen->COLS; 175 176 #ifdef DEBUG 177 __CTRACE(__CTRACE_INIT, "setterm: LINES = %d, COLS = %d\n", 178 LINES, COLS); 179 #endif 180 if (!unknown) { 181 if (zap(screen) == ERR) /* Get terminal description.*/ 182 return ERR; 183 } 184 185 /* If we can't tab, we can't backtab, either. */ 186 if (!screen->GT) 187 screen->tc_bt = NULL; 188 189 /* 190 * Test for cursor motion capability. 191 * 192 */ 193 if (t_goto(NULL, screen->tc_cm, 0, 0, cm_buff, sizeof(cm_buff) - 1) < 0) { 194 screen->CA = 0; 195 screen->tc_cm = 0; 196 } else 197 screen->CA = 1; 198 199 /* 200 * set the pad char, only take the first char of the pc capability 201 * as this is all we can use. 202 */ 203 screen->pad_char = screen->tc_pc ? screen->tc_pc[0] : 0; 204 205 /* Get full name of terminal */ 206 if (unknown) { 207 strcpy(screen->ttytype, "dumb"); 208 } else { 209 char *tcptr; 210 size_t limit = 0; 211 if (t_getterm(screen->cursesi_genbuf, 0, &limit)) 212 return ERR; 213 if ((tcptr = malloc(limit + 1)) == NULL) 214 return ERR; 215 if (t_getterm(screen->cursesi_genbuf, &tcptr, 0) < 0) 216 return ERR; 217 __longname(tcptr, screen->ttytype); 218 free(tcptr); 219 } 220 221 /* If no scrolling commands, no quick change. */ 222 screen->noqch = 223 (screen->tc_cs == NULL || screen->tc_ho == NULL || 224 (screen->tc_SF == NULL && screen->tc_sf == NULL) || 225 (screen->tc_SR == NULL && screen->tc_sr == NULL)) && 226 ((screen->tc_AL == NULL && screen->tc_al == NULL) || 227 (screen->tc_DL == NULL && screen->tc_dl == NULL)); 228 229 /* 230 * Precalculate conflict info for color/attribute end commands. 231 */ 232 #ifndef HAVE_WCHAR 233 screen->mask_op = __ATTRIBUTES & ~__COLOR; 234 #else 235 screen->mask_op = WA_ATTRIBUTES & ~__COLOR; 236 #endif /* HAVE_WCHAR */ 237 if (screen->tc_op != NULL) { 238 if (does_esc_m(screen->tc_op)) 239 screen->mask_op &= 240 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 241 else { 242 if (screen->tc_se != NULL && 243 !strcmp(screen->tc_op, screen->tc_se)) 244 screen->mask_op &= ~__STANDOUT; 245 if (screen->tc_ue != NULL && 246 !strcmp(screen->tc_op, screen->tc_ue)) 247 screen->mask_op &= ~__UNDERSCORE; 248 if (screen->tc_me != NULL && 249 !strcmp(screen->tc_op, screen->tc_me)) 250 screen->mask_op &= ~__TERMATTR; 251 } 252 } 253 /* 254 * Assume that "me" turns off all attributes apart from ACS. 255 * It might turn off ACS, so check for that. 256 */ 257 if (screen->tc_me != NULL && does_ctrl_o(screen->tc_me)) 258 screen->mask_me = 0; 259 else 260 screen->mask_me = __ALTCHARSET; 261 262 /* Check what turning off the attributes also turns off */ 263 #ifndef HAVE_WCHAR 264 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 265 #else 266 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 267 #endif /* HAVE_WCHAR */ 268 if (screen->tc_ue != NULL) { 269 if (does_esc_m(screen->tc_ue)) 270 screen->mask_ue &= 271 ~(__STANDOUT | __TERMATTR | __COLOR); 272 else { 273 if (screen->tc_se != NULL && 274 !strcmp(screen->tc_ue, screen->tc_se)) 275 screen->mask_ue &= ~__STANDOUT; 276 if (screen->tc_me != NULL && 277 !strcmp(screen->tc_ue, screen->tc_me)) 278 screen->mask_ue &= ~__TERMATTR; 279 if (screen->tc_op != NULL && 280 !strcmp(screen->tc_ue, screen->tc_op)) 281 screen->mask_ue &= ~__COLOR; 282 } 283 } 284 #ifndef HAVE_WCHAR 285 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 286 #else 287 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 288 #endif /* HAVE_WCHAR */ 289 if (screen->tc_se != NULL) { 290 if (does_esc_m(screen->tc_se)) 291 screen->mask_se &= 292 ~(__UNDERSCORE | __TERMATTR | __COLOR); 293 else { 294 if (screen->tc_ue != NULL && 295 !strcmp(screen->tc_se, screen->tc_ue)) 296 screen->mask_se &= ~__UNDERSCORE; 297 if (screen->tc_me != NULL && 298 !strcmp(screen->tc_se, screen->tc_me)) 299 screen->mask_se &= ~__TERMATTR; 300 if (screen->tc_op != NULL && 301 !strcmp(screen->tc_se, screen->tc_op)) 302 screen->mask_se &= ~__COLOR; 303 } 304 } 305 306 return (unknown ? ERR : OK); 307 } 308 309 /* 310 * _cursesi_resetterm -- 311 * Copy the terminal instance data for the given screen to the global 312 * variables. 313 */ 314 void 315 _cursesi_resetterm(SCREEN *screen) 316 { 317 char ***sp, **scr_sp; 318 int **vp, *scr_vp, i; 319 char **fp, *scr_fp; 320 321 LINES = screen->LINES; 322 COLS = screen->COLS; 323 324 /* reset terminal capabilities */ 325 fp = sflags; 326 scr_fp = &screen->tc_am; 327 for (i = 0; i < screen->flag_count; i++) 328 *(*fp++) = *scr_fp++; 329 330 vp = svals; 331 scr_vp = &screen->tc_pa; 332 for (i = 0; i < screen->int_count; i++) 333 *(*vp++) = *scr_vp++; 334 335 sp = sstrs; 336 scr_sp = &screen->tc_AB; 337 for (i = 0; i < screen->str_count; i++) 338 *(*sp++) = *scr_sp++; 339 340 __GT = screen->GT; 341 __CA = screen->CA; 342 343 PC = screen->pad_char; 344 345 __noqch = screen->noqch; 346 __mask_op = screen->mask_op; 347 __mask_me = screen->mask_me; 348 __mask_ue = screen->mask_ue; 349 __mask_se = screen->mask_se; 350 } 351 352 /* 353 * zap -- 354 * Gets all the terminal flags from the termcap database. 355 */ 356 static int 357 zap(SCREEN *screen) 358 { 359 const char *nampstr, *namp; 360 char **sp; 361 int *vp; 362 char *fp; 363 char tmp[3]; 364 #ifdef DEBUG 365 char *cp; 366 #endif 367 tmp[2] = '\0'; 368 369 namp = "ambsccdaeohchlinmimsncnsosulutxbxnxtxsxx"; 370 fp = &screen->tc_am; 371 screen->flag_count = 0; 372 do { 373 *tmp = *namp; 374 *(tmp + 1) = *(namp + 1); 375 *fp++ = t_getflag(screen->cursesi_genbuf, tmp); 376 #ifdef DEBUG 377 __CTRACE(__CTRACE_INIT, "%2.2s = %s\n", namp, 378 fp[-1] ? "TRUE" : "FALSE"); 379 #endif 380 namp += 2; 381 screen->flag_count++; 382 } while (*namp); 383 namp = "paCoNC"; 384 vp = &screen->tc_pa; 385 screen->int_count = 0; 386 do { 387 *tmp = *namp; 388 *(tmp + 1) = *(namp + 1); 389 *vp++ = t_getnum(screen->cursesi_genbuf, tmp); 390 #ifdef DEBUG 391 __CTRACE(__CTRACE_INIT, "%2.2s = %d\n", namp, vp[-1]); 392 #endif 393 namp += 2; 394 screen->int_count++; 395 } while (*namp); 396 397 #ifndef HAVE_WCHAR 398 nampstr = "ABacaeAFALalasbcblbtcdceclcmcrcsdcDLdldmDOdoeAedeihoIcicimIpipk0k1k2k3k4k5k6k7k8k9kdkekhklkrkskuLEllmambmdmemhmkmmmompmrndnlocoppcrcRISbscseSFSfsfsospSRsrtatetiucueUPupusvbvevivs"; 399 #else 400 nampstr = "ABacaeAFALalasbcblbtcdceclcmcrcsdcDLdldmDOdoeAedeihoIcicimIpipk0k1k2k3k4k5k6k7k8k9kdkekhklkrkskuLEllmambmdmemhmkmmmompmrndnlocoppcrcRISbscseSFSfsfsospSRsrtatetiucueUPupusvbvevivsXhXlXoXrXtXv"; 401 #endif /* HAVE_WCHAR */ 402 403 namp = nampstr; 404 sp = &screen->tc_AB; 405 screen->str_count = 0; 406 do { 407 *tmp = *namp; 408 *(tmp + 1) = *(namp + 1); 409 *sp++ = t_agetstr(screen->cursesi_genbuf, tmp); 410 #ifdef DEBUG 411 if (sp[-1] == NULL) 412 __CTRACE(__CTRACE_INIT, "%2.2s = NULL\n", namp); 413 else { 414 __CTRACE(__CTRACE_INIT, "%2.2s = \"", namp); 415 for (cp = sp[-1]; *cp; cp++) 416 __CTRACE(__CTRACE_INIT, "%s", unctrl(*cp)); 417 __CTRACE(__CTRACE_INIT, "\"\n"); 418 } 419 #endif 420 namp += 2; 421 screen->str_count++; 422 } while (*namp); 423 if (screen->tc_xs) 424 screen->tc_so = screen->tc_se = NULL; 425 else { 426 if (t_getnum(screen->cursesi_genbuf, "sg") > 0) 427 screen->tc_so = NULL; 428 if (t_getnum(screen->cursesi_genbuf, "ug") > 0) 429 screen->tc_us = NULL; 430 if (!screen->tc_so && screen->tc_us) { 431 screen->tc_so = screen->tc_us; 432 screen->tc_se = screen->tc_ue; 433 } 434 } 435 436 return OK; 437 } 438 439 /* 440 * getcap -- 441 * Return a capability from termcap. 442 */ 443 char * 444 getcap(char *name) 445 { 446 return (t_agetstr(_cursesi_screen->cursesi_genbuf, name)); 447 } 448 449 /* 450 * does_esc_m -- 451 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 452 * other attributes, so we check for this in the capability passed to us. 453 * Note that we can't just do simple string comparison, as the capability 454 * may contain multiple, ';' separated sequence parts. 455 */ 456 static int 457 does_esc_m(char *cap) 458 { 459 #define WAITING 0 460 #define PARSING 1 461 #define NUMBER 2 462 #define FOUND 4 463 char *capptr; 464 int seq; 465 466 #ifdef DEBUG 467 __CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap); 468 #endif 469 /* Is it just "\E[m" or "\E[0m"? */ 470 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 471 return 1; 472 473 /* Does it contain a "\E[...m" sequence? */ 474 if (strlen(cap) < 4) 475 return 0; 476 capptr = cap; 477 seq = WAITING; 478 while (*capptr != 0) { 479 switch (seq) { 480 /* Start of sequence */ 481 case WAITING: 482 if (!strncmp(capptr, "\x1b[", 2)) { 483 capptr+=2; 484 if (*capptr == 'm') 485 return 1; 486 else { 487 seq=PARSING; 488 continue; 489 } 490 } 491 break; 492 /* Looking for '0' */ 493 case PARSING: 494 if (*capptr == '0') 495 seq=FOUND; 496 else if (*capptr > '0' && *capptr <= '9') 497 seq=NUMBER; 498 else if (*capptr != ';') 499 seq=WAITING; 500 break; 501 /* Some other number */ 502 case NUMBER: 503 if (*capptr == ';') 504 seq=PARSING; 505 else if (!(*capptr >= '0' && *capptr <= '9')) 506 seq=WAITING; 507 break; 508 /* Found a '0' */ 509 case FOUND: 510 if (*capptr == 'm') 511 return 1; 512 else if (!((*capptr >= '0' && *capptr <= '9') || 513 *capptr == ';')) 514 seq=WAITING; 515 break; 516 default: 517 break; 518 } 519 capptr++; 520 } 521 return 0; 522 } 523 524 /* 525 * does_ctrl_o -- 526 * A hack for vt100/xterm-like terminals where the "me" capability also 527 * unsets acs (i.e. it contains the character '\017'). 528 */ 529 static int 530 does_ctrl_o(char *cap) 531 { 532 char *capptr = cap; 533 534 #ifdef DEBUG 535 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Looping on %s\n", capptr); 536 #endif 537 while (*capptr != 0) { 538 if (*capptr == '\x0f') 539 return 1; 540 capptr++; 541 } 542 return 0; 543 } 544