1 /* $NetBSD: setterm.c,v 1.72 2024/05/17 23:32:50 uwe 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 1.72 2024/05/17 23:32:50 uwe Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <termios.h> 44 #include <unistd.h> 45 46 #include "curses.h" 47 #include "curses_private.h" 48 49 static int does_esc_m(const char *cap); 50 static int does_ctrl_o(const char *exit_cap, const char *acs_cap); 51 52 attr_t __mask_op, __mask_me, __mask_ue, __mask_se; 53 54 int 55 setterm(const char *type) 56 { 57 58 return _cursesi_setterm(type, _cursesi_screen); 59 } 60 61 int 62 _cursesi_setterm(const char *type, SCREEN *screen) 63 { 64 int unknown, r; 65 char *p; 66 67 if (type[0] == '\0') 68 type = "xx"; 69 unknown = 0; 70 if (screen->term) 71 del_curterm(screen->term); 72 (void)ti_setupterm(&screen->term, type, fileno(screen->outfd), &r); 73 if (screen->term == NULL) { 74 unknown++; 75 (void)ti_setupterm(&screen->term, "dumb", 76 fileno(screen->outfd), &r); 77 /* No dumb term? We can't continue */ 78 if (screen->term == NULL) 79 return ERR; 80 } 81 __CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type); 82 83 /* lines and cols will have been setup correctly by ti_setupterm(3). */ 84 screen->LINES = t_lines(screen->term); 85 screen->COLS = t_columns(screen->term); 86 87 if (screen->filtered) { 88 /* Disable use of clear, cud, cud1, cup, cuu1 and vpa. */ 89 screen->term->strs[TICODE_clear] = NULL; 90 screen->term->strs[TICODE_cud] = NULL; 91 screen->term->strs[TICODE_cud1] = NULL; 92 screen->term->strs[TICODE_cup] = NULL; 93 screen->term->strs[TICODE_cuu] = NULL; 94 screen->term->strs[TICODE_cuu1] = NULL; 95 screen->term->strs[TICODE_vpa] = NULL; 96 /* Set the value of the home string to the value of 97 * the cr string. */ 98 screen->term->strs[TICODE_home] = screen->term->strs[TICODE_cr]; 99 /* Set lines equal to 1. */ 100 screen->LINES = 1; 101 t_lines(screen->term) = 1; 102 } 103 __CTRACE(__CTRACE_INIT, "setterm: filtered %d\n", screen->filtered); 104 105 if ((p = getenv("ESCDELAY")) != NULL) 106 screen->ESCDELAY = (int)strtol(p, NULL, 0); 107 else 108 screen->ESCDELAY = ESCDELAY_DEFAULT; 109 if ((p = getenv("TABSIZE")) != NULL) 110 screen->TABSIZE = (int)strtol(p, NULL, 0); 111 else if (t_init_tabs(screen->term) >= 0) 112 screen->TABSIZE = (int)t_init_tabs(screen->term); 113 else 114 screen->TABSIZE = TABSIZE_DEFAULT; 115 /* 116 * Want cols > 4, otherwise things will fail. 117 */ 118 if (screen->COLS <= 4) 119 return ERR; 120 121 LINES = screen->LINES; 122 COLS = screen->COLS; 123 ESCDELAY = screen->ESCDELAY; 124 TABSIZE = screen->TABSIZE; 125 126 __CTRACE(__CTRACE_INIT, 127 "setterm: LINES = %d, COLS = %d, TABSIZE = %d\n", 128 LINES, COLS, TABSIZE); 129 130 /* 131 * set the pad char, only take the first char of the pc capability 132 * as this is all we can use. 133 */ 134 screen->padchar = t_pad_char(screen->term) ? 135 t_pad_char(screen->term)[0] : 0; 136 137 /* If no scrolling commands, no quick change. */ 138 screen->noqch = 139 (t_change_scroll_region(screen->term) == NULL || 140 t_cursor_home(screen->term) == NULL || 141 (t_parm_index(screen->term) == NULL && 142 t_scroll_forward(screen->term) == NULL) || 143 (t_parm_rindex(screen->term) == NULL && 144 t_scroll_reverse(screen->term) == NULL)) && 145 ((t_parm_insert_line(screen->term) == NULL && 146 t_insert_line(screen->term) == NULL) || 147 (t_parm_delete_line(screen->term) == NULL && 148 t_delete_line(screen->term) == NULL)); 149 150 /* 151 * Precalculate conflict info for color/attribute end commands. 152 */ 153 #ifndef HAVE_WCHAR 154 screen->mask_op = __ATTRIBUTES & ~__COLOR; 155 #else 156 screen->mask_op = WA_ATTRIBUTES & ~__COLOR; 157 #endif /* HAVE_WCHAR */ 158 159 const char *t_op = t_orig_pair(screen->term); 160 const char *t_esm = t_exit_standout_mode(screen->term); 161 const char *t_eum = t_exit_underline_mode(screen->term); 162 const char *t_eam = t_exit_attribute_mode(screen->term); 163 164 if (t_op != NULL) { 165 if (does_esc_m(t_op)) 166 screen->mask_op &= 167 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 168 else { 169 if (t_esm != NULL && !strcmp(t_op, t_esm)) 170 screen->mask_op &= ~__STANDOUT; 171 172 if (t_eum != NULL && !strcmp(t_op, t_eum)) 173 screen->mask_op &= ~__UNDERSCORE; 174 175 if (t_eam != NULL && !strcmp(t_op, t_eam)) 176 screen->mask_op &= ~__TERMATTR; 177 } 178 } 179 /* 180 * Assume that "me" turns off all attributes apart from ACS. 181 * It might turn off ACS, so check for that. 182 */ 183 if (t_exit_attribute_mode(screen->term) != NULL && 184 t_exit_alt_charset_mode(screen->term) != NULL && 185 does_ctrl_o(t_exit_attribute_mode(screen->term), 186 t_exit_alt_charset_mode(screen->term))) 187 screen->mask_me = 0; 188 else 189 screen->mask_me = __ALTCHARSET; 190 191 /* Check what turning off the attributes also turns off */ 192 #ifndef HAVE_WCHAR 193 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 194 #else 195 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 196 #endif /* HAVE_WCHAR */ 197 if (t_eum != NULL) { 198 if (does_esc_m(t_eum)) 199 screen->mask_ue &= 200 ~(__STANDOUT | __TERMATTR | __COLOR); 201 else { 202 if (t_esm && !strcmp(t_eum, t_esm)) 203 screen->mask_ue &= ~__STANDOUT; 204 205 if (t_eam != NULL && !strcmp(t_eum, t_eam)) 206 screen->mask_ue &= ~__TERMATTR; 207 208 if (t_op != NULL && !strcmp(t_eum, t_op)) 209 screen->mask_ue &= ~__COLOR; 210 } 211 } 212 #ifndef HAVE_WCHAR 213 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 214 #else 215 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 216 #endif /* HAVE_WCHAR */ 217 if (t_esm != NULL) { 218 if (does_esc_m(t_esm)) 219 screen->mask_se &= 220 ~(__UNDERSCORE | __TERMATTR | __COLOR); 221 else { 222 if (t_eum != NULL && !strcmp(t_esm, t_eum)) 223 screen->mask_se &= ~__UNDERSCORE; 224 225 if (t_eam != NULL && !strcmp(t_esm, t_eam)) 226 screen->mask_se &= ~__TERMATTR; 227 228 if (t_op != NULL && !strcmp(t_esm, t_op)) 229 screen->mask_se &= ~__COLOR; 230 } 231 } 232 233 return unknown ? ERR : OK; 234 } 235 236 /* 237 * _cursesi_resetterm -- 238 * Copy the terminal instance data for the given screen to the global 239 * variables. 240 */ 241 void 242 _cursesi_resetterm(SCREEN *screen) 243 { 244 245 LINES = screen->LINES; 246 COLS = screen->COLS; 247 ESCDELAY = screen->ESCDELAY; 248 TABSIZE = screen->TABSIZE; 249 __GT = screen->GT; 250 251 __noqch = screen->noqch; 252 __mask_op = screen->mask_op; 253 __mask_me = screen->mask_me; 254 __mask_ue = screen->mask_ue; 255 __mask_se = screen->mask_se; 256 257 set_curterm(screen->term); 258 } 259 260 /* 261 * does_esc_m -- 262 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 263 * other attributes, so we check for this in the capability passed to us. 264 * Note that we can't just do simple string comparison, as the capability 265 * may contain multiple, ';' separated sequence parts. 266 */ 267 static int 268 does_esc_m(const char *cap) 269 { 270 #define WAITING 0 271 #define PARSING 1 272 #define NUMBER 2 273 #define FOUND 4 274 const char *capptr; 275 int seq; 276 277 __CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap); 278 /* Is it just "\E[m" or "\E[0m"? */ 279 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 280 return 1; 281 282 /* Does it contain a "\E[...m" sequence? */ 283 if (strlen(cap) < 4) 284 return 0; 285 capptr = cap; 286 seq = WAITING; 287 while (*capptr != 0) { 288 switch (seq) { 289 /* Start of sequence */ 290 case WAITING: 291 if (!strncmp(capptr, "\x1b[", 2)) { 292 capptr+=2; 293 if (*capptr == 'm') 294 return 1; 295 else { 296 seq=PARSING; 297 continue; 298 } 299 } 300 break; 301 /* Looking for '0' */ 302 case PARSING: 303 if (*capptr == '0') 304 seq=FOUND; 305 else if (*capptr > '0' && *capptr <= '9') 306 seq=NUMBER; 307 else if (*capptr != ';') 308 seq=WAITING; 309 break; 310 /* Some other number */ 311 case NUMBER: 312 if (*capptr == ';') 313 seq=PARSING; 314 else if (!(*capptr >= '0' && *capptr <= '9')) 315 seq=WAITING; 316 break; 317 /* Found a '0' */ 318 case FOUND: 319 if (*capptr == 'm') 320 return 1; 321 else if (!((*capptr >= '0' && *capptr <= '9') || 322 *capptr == ';')) 323 seq=WAITING; 324 break; 325 default: 326 break; 327 } 328 capptr++; 329 } 330 return 0; 331 } 332 333 /* 334 * capdup_nodelay -- 335 * A helper for does_ctrl_o below that creates a copy of the given 336 * capability with delay specifications dropped. 337 */ 338 static char * 339 capdup_nodelay(const char *src) 340 { 341 char *clean, *dst; 342 343 dst = clean = malloc(strlen(src) + 1); 344 if (__predict_false(clean == NULL)) 345 return NULL; 346 347 while (*src != '\0') { 348 if (src[0] == '$' && src[1] == '<') { 349 const char *end = strchr(src + 2, '>'); 350 if (__predict_true(end != NULL)) { 351 src = end + 1; 352 continue; 353 } 354 } 355 *dst++ = *src++; 356 } 357 358 *dst = '\0'; 359 return clean; 360 } 361 362 /* 363 * does_ctrl_o -- 364 * A hack for vt100/xterm-like terminals where the "me" capability also 365 * unsets acs. 366 */ 367 static int 368 does_ctrl_o(const char *exit_cap, const char *acs_cap) 369 { 370 char *eptr, *aptr; 371 int res; 372 373 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Testing %s for %s\n", 374 exit_cap, acs_cap); 375 376 eptr = capdup_nodelay(exit_cap); 377 if (__predict_false(eptr == NULL)) 378 return 0; 379 380 aptr = capdup_nodelay(acs_cap); 381 if (__predict_false(aptr == NULL)) { 382 free(eptr); 383 return 0; 384 } 385 386 res = strstr(eptr, aptr) != NULL; 387 388 free(eptr); 389 free(aptr); 390 return res; 391 } 392 393 /* 394 * set_tabsize -- 395 * Sets the tabsize for the current screen. 396 */ 397 int 398 set_tabsize(int tabsize) 399 { 400 401 if (_cursesi_screen == NULL) 402 return ERR; 403 _cursesi_screen->TABSIZE = tabsize; 404 TABSIZE = tabsize; 405 return OK; 406 } 407
Indexes created Wed Sep 24 02:09:48 GMT 2025