1 /* $OpenBSD: tty-term.c,v 1.52 2017/02/21 14:18:12 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 21 #include <curses.h> 22 #include <fnmatch.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <term.h> 26 #include <vis.h> 27 28 #include "tmux.h" 29 30 static void tty_term_override(struct tty_term *, const char *); 31 static char *tty_term_strip(const char *); 32 33 struct tty_terms tty_terms = LIST_HEAD_INITIALIZER(tty_terms); 34 35 enum tty_code_type { 36 TTYCODE_NONE = 0, 37 TTYCODE_STRING, 38 TTYCODE_NUMBER, 39 TTYCODE_FLAG, 40 }; 41 42 struct tty_code { 43 enum tty_code_type type; 44 union { 45 char *string; 46 int number; 47 int flag; 48 } value; 49 }; 50 51 struct tty_term_code_entry { 52 enum tty_code_type type; 53 const char *name; 54 }; 55 56 static const struct tty_term_code_entry tty_term_codes[] = { 57 [TTYC_ACSC] = { TTYCODE_STRING, "acsc" }, 58 [TTYC_AX] = { TTYCODE_FLAG, "AX" }, 59 [TTYC_BCE] = { TTYCODE_FLAG, "bce" }, 60 [TTYC_BEL] = { TTYCODE_STRING, "bel" }, 61 [TTYC_BLINK] = { TTYCODE_STRING, "blink" }, 62 [TTYC_BOLD] = { TTYCODE_STRING, "bold" }, 63 [TTYC_CIVIS] = { TTYCODE_STRING, "civis" }, 64 [TTYC_CLEAR] = { TTYCODE_STRING, "clear" }, 65 [TTYC_CNORM] = { TTYCODE_STRING, "cnorm" }, 66 [TTYC_COLORS] = { TTYCODE_NUMBER, "colors" }, 67 [TTYC_CR] = { TTYCODE_STRING, "Cr" }, 68 [TTYC_CS] = { TTYCODE_STRING, "Cs" }, 69 [TTYC_CSR] = { TTYCODE_STRING, "csr" }, 70 [TTYC_CUB] = { TTYCODE_STRING, "cub" }, 71 [TTYC_CUB1] = { TTYCODE_STRING, "cub1" }, 72 [TTYC_CUD] = { TTYCODE_STRING, "cud" }, 73 [TTYC_CUD1] = { TTYCODE_STRING, "cud1" }, 74 [TTYC_CUF] = { TTYCODE_STRING, "cuf" }, 75 [TTYC_CUF1] = { TTYCODE_STRING, "cuf1" }, 76 [TTYC_CUP] = { TTYCODE_STRING, "cup" }, 77 [TTYC_CUU] = { TTYCODE_STRING, "cuu" }, 78 [TTYC_CUU1] = { TTYCODE_STRING, "cuu1" }, 79 [TTYC_CVVIS] = { TTYCODE_STRING, "cvvis" }, 80 [TTYC_DCH] = { TTYCODE_STRING, "dch" }, 81 [TTYC_DCH1] = { TTYCODE_STRING, "dch1" }, 82 [TTYC_DIM] = { TTYCODE_STRING, "dim" }, 83 [TTYC_DL] = { TTYCODE_STRING, "dl" }, 84 [TTYC_DL1] = { TTYCODE_STRING, "dl1" }, 85 [TTYC_E3] = { TTYCODE_STRING, "E3" }, 86 [TTYC_ECH] = { TTYCODE_STRING, "ech" }, 87 [TTYC_ED] = { TTYCODE_STRING, "ed" }, 88 [TTYC_EL] = { TTYCODE_STRING, "el" }, 89 [TTYC_EL1] = { TTYCODE_STRING, "el1" }, 90 [TTYC_ENACS] = { TTYCODE_STRING, "enacs" }, 91 [TTYC_FSL] = { TTYCODE_STRING, "fsl" }, 92 [TTYC_HOME] = { TTYCODE_STRING, "home" }, 93 [TTYC_HPA] = { TTYCODE_STRING, "hpa" }, 94 [TTYC_ICH] = { TTYCODE_STRING, "ich" }, 95 [TTYC_ICH1] = { TTYCODE_STRING, "ich1" }, 96 [TTYC_IL] = { TTYCODE_STRING, "il" }, 97 [TTYC_IL1] = { TTYCODE_STRING, "il1" }, 98 [TTYC_INDN] = { TTYCODE_STRING, "indn" }, 99 [TTYC_INVIS] = { TTYCODE_STRING, "invis" }, 100 [TTYC_KCBT] = { TTYCODE_STRING, "kcbt" }, 101 [TTYC_KCUB1] = { TTYCODE_STRING, "kcub1" }, 102 [TTYC_KCUD1] = { TTYCODE_STRING, "kcud1" }, 103 [TTYC_KCUF1] = { TTYCODE_STRING, "kcuf1" }, 104 [TTYC_KCUU1] = { TTYCODE_STRING, "kcuu1" }, 105 [TTYC_KDC2] = { TTYCODE_STRING, "kDC" }, 106 [TTYC_KDC3] = { TTYCODE_STRING, "kDC3" }, 107 [TTYC_KDC4] = { TTYCODE_STRING, "kDC4" }, 108 [TTYC_KDC5] = { TTYCODE_STRING, "kDC5" }, 109 [TTYC_KDC6] = { TTYCODE_STRING, "kDC6" }, 110 [TTYC_KDC7] = { TTYCODE_STRING, "kDC7" }, 111 [TTYC_KDCH1] = { TTYCODE_STRING, "kdch1" }, 112 [TTYC_KDN2] = { TTYCODE_STRING, "kDN" }, 113 [TTYC_KDN3] = { TTYCODE_STRING, "kDN3" }, 114 [TTYC_KDN4] = { TTYCODE_STRING, "kDN4" }, 115 [TTYC_KDN5] = { TTYCODE_STRING, "kDN5" }, 116 [TTYC_KDN6] = { TTYCODE_STRING, "kDN6" }, 117 [TTYC_KDN7] = { TTYCODE_STRING, "kDN7" }, 118 [TTYC_KEND] = { TTYCODE_STRING, "kend" }, 119 [TTYC_KEND2] = { TTYCODE_STRING, "kEND" }, 120 [TTYC_KEND3] = { TTYCODE_STRING, "kEND3" }, 121 [TTYC_KEND4] = { TTYCODE_STRING, "kEND4" }, 122 [TTYC_KEND5] = { TTYCODE_STRING, "kEND5" }, 123 [TTYC_KEND6] = { TTYCODE_STRING, "kEND6" }, 124 [TTYC_KEND7] = { TTYCODE_STRING, "kEND7" }, 125 [TTYC_KF1] = { TTYCODE_STRING, "kf1" }, 126 [TTYC_KF10] = { TTYCODE_STRING, "kf10" }, 127 [TTYC_KF11] = { TTYCODE_STRING, "kf11" }, 128 [TTYC_KF12] = { TTYCODE_STRING, "kf12" }, 129 [TTYC_KF13] = { TTYCODE_STRING, "kf13" }, 130 [TTYC_KF14] = { TTYCODE_STRING, "kf14" }, 131 [TTYC_KF15] = { TTYCODE_STRING, "kf15" }, 132 [TTYC_KF16] = { TTYCODE_STRING, "kf16" }, 133 [TTYC_KF17] = { TTYCODE_STRING, "kf17" }, 134 [TTYC_KF18] = { TTYCODE_STRING, "kf18" }, 135 [TTYC_KF19] = { TTYCODE_STRING, "kf19" }, 136 [TTYC_KF2] = { TTYCODE_STRING, "kf2" }, 137 [TTYC_KF20] = { TTYCODE_STRING, "kf20" }, 138 [TTYC_KF21] = { TTYCODE_STRING, "kf21" }, 139 [TTYC_KF22] = { TTYCODE_STRING, "kf22" }, 140 [TTYC_KF23] = { TTYCODE_STRING, "kf23" }, 141 [TTYC_KF24] = { TTYCODE_STRING, "kf24" }, 142 [TTYC_KF25] = { TTYCODE_STRING, "kf25" }, 143 [TTYC_KF26] = { TTYCODE_STRING, "kf26" }, 144 [TTYC_KF27] = { TTYCODE_STRING, "kf27" }, 145 [TTYC_KF28] = { TTYCODE_STRING, "kf28" }, 146 [TTYC_KF29] = { TTYCODE_STRING, "kf29" }, 147 [TTYC_KF3] = { TTYCODE_STRING, "kf3" }, 148 [TTYC_KF30] = { TTYCODE_STRING, "kf30" }, 149 [TTYC_KF31] = { TTYCODE_STRING, "kf31" }, 150 [TTYC_KF32] = { TTYCODE_STRING, "kf32" }, 151 [TTYC_KF33] = { TTYCODE_STRING, "kf33" }, 152 [TTYC_KF34] = { TTYCODE_STRING, "kf34" }, 153 [TTYC_KF35] = { TTYCODE_STRING, "kf35" }, 154 [TTYC_KF36] = { TTYCODE_STRING, "kf36" }, 155 [TTYC_KF37] = { TTYCODE_STRING, "kf37" }, 156 [TTYC_KF38] = { TTYCODE_STRING, "kf38" }, 157 [TTYC_KF39] = { TTYCODE_STRING, "kf39" }, 158 [TTYC_KF4] = { TTYCODE_STRING, "kf4" }, 159 [TTYC_KF40] = { TTYCODE_STRING, "kf40" }, 160 [TTYC_KF41] = { TTYCODE_STRING, "kf41" }, 161 [TTYC_KF42] = { TTYCODE_STRING, "kf42" }, 162 [TTYC_KF43] = { TTYCODE_STRING, "kf43" }, 163 [TTYC_KF44] = { TTYCODE_STRING, "kf44" }, 164 [TTYC_KF45] = { TTYCODE_STRING, "kf45" }, 165 [TTYC_KF46] = { TTYCODE_STRING, "kf46" }, 166 [TTYC_KF47] = { TTYCODE_STRING, "kf47" }, 167 [TTYC_KF48] = { TTYCODE_STRING, "kf48" }, 168 [TTYC_KF49] = { TTYCODE_STRING, "kf49" }, 169 [TTYC_KF5] = { TTYCODE_STRING, "kf5" }, 170 [TTYC_KF50] = { TTYCODE_STRING, "kf50" }, 171 [TTYC_KF51] = { TTYCODE_STRING, "kf51" }, 172 [TTYC_KF52] = { TTYCODE_STRING, "kf52" }, 173 [TTYC_KF53] = { TTYCODE_STRING, "kf53" }, 174 [TTYC_KF54] = { TTYCODE_STRING, "kf54" }, 175 [TTYC_KF55] = { TTYCODE_STRING, "kf55" }, 176 [TTYC_KF56] = { TTYCODE_STRING, "kf56" }, 177 [TTYC_KF57] = { TTYCODE_STRING, "kf57" }, 178 [TTYC_KF58] = { TTYCODE_STRING, "kf58" }, 179 [TTYC_KF59] = { TTYCODE_STRING, "kf59" }, 180 [TTYC_KF6] = { TTYCODE_STRING, "kf6" }, 181 [TTYC_KF60] = { TTYCODE_STRING, "kf60" }, 182 [TTYC_KF61] = { TTYCODE_STRING, "kf61" }, 183 [TTYC_KF62] = { TTYCODE_STRING, "kf62" }, 184 [TTYC_KF63] = { TTYCODE_STRING, "kf63" }, 185 [TTYC_KF7] = { TTYCODE_STRING, "kf7" }, 186 [TTYC_KF8] = { TTYCODE_STRING, "kf8" }, 187 [TTYC_KF9] = { TTYCODE_STRING, "kf9" }, 188 [TTYC_KHOM2] = { TTYCODE_STRING, "kHOM" }, 189 [TTYC_KHOM3] = { TTYCODE_STRING, "kHOM3" }, 190 [TTYC_KHOM4] = { TTYCODE_STRING, "kHOM4" }, 191 [TTYC_KHOM5] = { TTYCODE_STRING, "kHOM5" }, 192 [TTYC_KHOM6] = { TTYCODE_STRING, "kHOM6" }, 193 [TTYC_KHOM7] = { TTYCODE_STRING, "kHOM7" }, 194 [TTYC_KHOME] = { TTYCODE_STRING, "khome" }, 195 [TTYC_KIC2] = { TTYCODE_STRING, "kIC" }, 196 [TTYC_KIC3] = { TTYCODE_STRING, "kIC3" }, 197 [TTYC_KIC4] = { TTYCODE_STRING, "kIC4" }, 198 [TTYC_KIC5] = { TTYCODE_STRING, "kIC5" }, 199 [TTYC_KIC6] = { TTYCODE_STRING, "kIC6" }, 200 [TTYC_KIC7] = { TTYCODE_STRING, "kIC7" }, 201 [TTYC_KICH1] = { TTYCODE_STRING, "kich1" }, 202 [TTYC_KLFT2] = { TTYCODE_STRING, "kLFT" }, 203 [TTYC_KLFT3] = { TTYCODE_STRING, "kLFT3" }, 204 [TTYC_KLFT4] = { TTYCODE_STRING, "kLFT4" }, 205 [TTYC_KLFT5] = { TTYCODE_STRING, "kLFT5" }, 206 [TTYC_KLFT6] = { TTYCODE_STRING, "kLFT6" }, 207 [TTYC_KLFT7] = { TTYCODE_STRING, "kLFT7" }, 208 [TTYC_KMOUS] = { TTYCODE_STRING, "kmous" }, 209 [TTYC_KNP] = { TTYCODE_STRING, "knp" }, 210 [TTYC_KNXT2] = { TTYCODE_STRING, "kNXT" }, 211 [TTYC_KNXT3] = { TTYCODE_STRING, "kNXT3" }, 212 [TTYC_KNXT4] = { TTYCODE_STRING, "kNXT4" }, 213 [TTYC_KNXT5] = { TTYCODE_STRING, "kNXT5" }, 214 [TTYC_KNXT6] = { TTYCODE_STRING, "kNXT6" }, 215 [TTYC_KNXT7] = { TTYCODE_STRING, "kNXT7" }, 216 [TTYC_KPP] = { TTYCODE_STRING, "kpp" }, 217 [TTYC_KPRV2] = { TTYCODE_STRING, "kPRV" }, 218 [TTYC_KPRV3] = { TTYCODE_STRING, "kPRV3" }, 219 [TTYC_KPRV4] = { TTYCODE_STRING, "kPRV4" }, 220 [TTYC_KPRV5] = { TTYCODE_STRING, "kPRV5" }, 221 [TTYC_KPRV6] = { TTYCODE_STRING, "kPRV6" }, 222 [TTYC_KPRV7] = { TTYCODE_STRING, "kPRV7" }, 223 [TTYC_KRIT2] = { TTYCODE_STRING, "kRIT" }, 224 [TTYC_KRIT3] = { TTYCODE_STRING, "kRIT3" }, 225 [TTYC_KRIT4] = { TTYCODE_STRING, "kRIT4" }, 226 [TTYC_KRIT5] = { TTYCODE_STRING, "kRIT5" }, 227 [TTYC_KRIT6] = { TTYCODE_STRING, "kRIT6" }, 228 [TTYC_KRIT7] = { TTYCODE_STRING, "kRIT7" }, 229 [TTYC_KUP2] = { TTYCODE_STRING, "kUP" }, 230 [TTYC_KUP3] = { TTYCODE_STRING, "kUP3" }, 231 [TTYC_KUP4] = { TTYCODE_STRING, "kUP4" }, 232 [TTYC_KUP5] = { TTYCODE_STRING, "kUP5" }, 233 [TTYC_KUP6] = { TTYCODE_STRING, "kUP6" }, 234 [TTYC_KUP7] = { TTYCODE_STRING, "kUP7" }, 235 [TTYC_MS] = { TTYCODE_STRING, "Ms" }, 236 [TTYC_OP] = { TTYCODE_STRING, "op" }, 237 [TTYC_REV] = { TTYCODE_STRING, "rev" }, 238 [TTYC_RI] = { TTYCODE_STRING, "ri" }, 239 [TTYC_RMACS] = { TTYCODE_STRING, "rmacs" }, 240 [TTYC_RMCUP] = { TTYCODE_STRING, "rmcup" }, 241 [TTYC_RMKX] = { TTYCODE_STRING, "rmkx" }, 242 [TTYC_SE] = { TTYCODE_STRING, "Se" }, 243 [TTYC_SETAB] = { TTYCODE_STRING, "setab" }, 244 [TTYC_SETAF] = { TTYCODE_STRING, "setaf" }, 245 [TTYC_SGR0] = { TTYCODE_STRING, "sgr0" }, 246 [TTYC_SITM] = { TTYCODE_STRING, "sitm" }, 247 [TTYC_SMACS] = { TTYCODE_STRING, "smacs" }, 248 [TTYC_SMCUP] = { TTYCODE_STRING, "smcup" }, 249 [TTYC_SMKX] = { TTYCODE_STRING, "smkx" }, 250 [TTYC_SMSO] = { TTYCODE_STRING, "smso" }, 251 [TTYC_SMUL] = { TTYCODE_STRING, "smul" }, 252 [TTYC_SS] = { TTYCODE_STRING, "Ss" }, 253 [TTYC_TC] = { TTYCODE_FLAG, "Tc" }, 254 [TTYC_TSL] = { TTYCODE_STRING, "tsl" }, 255 [TTYC_VPA] = { TTYCODE_STRING, "vpa" }, 256 [TTYC_XENL] = { TTYCODE_FLAG, "xenl" }, 257 [TTYC_XT] = { TTYCODE_FLAG, "XT" }, 258 }; 259 260 u_int 261 tty_term_ncodes(void) 262 { 263 return (nitems(tty_term_codes)); 264 } 265 266 static char * 267 tty_term_strip(const char *s) 268 { 269 const char *ptr; 270 static char buf[BUFSIZ]; 271 size_t len; 272 273 /* Ignore strings with no padding. */ 274 if (strchr(s, '$') == NULL) 275 return (xstrdup(s)); 276 277 len = 0; 278 for (ptr = s; *ptr != '\0'; ptr++) { 279 if (*ptr == '$' && *(ptr + 1) == '<') { 280 while (*ptr != '\0' && *ptr != '>') 281 ptr++; 282 if (*ptr == '>') 283 ptr++; 284 } 285 286 buf[len++] = *ptr; 287 if (len == (sizeof buf) - 1) 288 break; 289 } 290 buf[len] = '\0'; 291 292 return (xstrdup(buf)); 293 } 294 295 static void 296 tty_term_override(struct tty_term *term, const char *override) 297 { 298 const struct tty_term_code_entry *ent; 299 struct tty_code *code; 300 char *next, *s, *copy, *cp, *value; 301 const char *errstr; 302 u_int i; 303 int n, remove; 304 305 copy = next = xstrdup(override); 306 307 s = strsep(&next, ":"); 308 if (s == NULL || next == NULL || fnmatch(s, term->name, 0) != 0) { 309 free(copy); 310 return; 311 } 312 313 while ((s = strsep(&next, ":")) != NULL) { 314 if (*s == '\0') 315 continue; 316 value = NULL; 317 318 remove = 0; 319 if ((cp = strchr(s, '=')) != NULL) { 320 *cp++ = '\0'; 321 value = xstrdup(cp); 322 if (strunvis(value, cp) == -1) { 323 free(value); 324 value = xstrdup(cp); 325 } 326 } else if (s[strlen(s) - 1] == '@') { 327 s[strlen(s) - 1] = '\0'; 328 remove = 1; 329 } else 330 value = xstrdup(""); 331 332 if (remove) 333 log_debug("%s override: %s@", term->name, s); 334 else 335 log_debug("%s override: %s=%s", term->name, s, value); 336 337 for (i = 0; i < tty_term_ncodes(); i++) { 338 ent = &tty_term_codes[i]; 339 if (strcmp(s, ent->name) != 0) 340 continue; 341 code = &term->codes[i]; 342 343 if (remove) { 344 code->type = TTYCODE_NONE; 345 continue; 346 } 347 switch (ent->type) { 348 case TTYCODE_NONE: 349 break; 350 case TTYCODE_STRING: 351 if (code->type == TTYCODE_STRING) 352 free(code->value.string); 353 code->value.string = xstrdup(value); 354 code->type = ent->type; 355 break; 356 case TTYCODE_NUMBER: 357 n = strtonum(value, 0, INT_MAX, &errstr); 358 if (errstr != NULL) 359 break; 360 code->value.number = n; 361 code->type = ent->type; 362 break; 363 case TTYCODE_FLAG: 364 code->value.flag = 1; 365 code->type = ent->type; 366 break; 367 } 368 } 369 370 free(value); 371 } 372 free(s); 373 } 374 375 struct tty_term * 376 tty_term_find(char *name, int fd, char **cause) 377 { 378 struct tty_term *term; 379 const struct tty_term_code_entry *ent; 380 struct tty_code *code; 381 struct options_entry *o; 382 u_int size, i; 383 int n, error; 384 const char *s, *acs; 385 386 LIST_FOREACH(term, &tty_terms, entry) { 387 if (strcmp(term->name, name) == 0) { 388 term->references++; 389 return (term); 390 } 391 } 392 393 log_debug("new term: %s", name); 394 term = xmalloc(sizeof *term); 395 term->name = xstrdup(name); 396 term->references = 1; 397 term->flags = 0; 398 term->codes = xcalloc(tty_term_ncodes(), sizeof *term->codes); 399 LIST_INSERT_HEAD(&tty_terms, term, entry); 400 401 /* Set up curses terminal. */ 402 if (setupterm(name, fd, &error) != OK) { 403 switch (error) { 404 case 1: 405 xasprintf(cause, "can't use hardcopy terminal: %s", 406 name); 407 break; 408 case 0: 409 xasprintf(cause, "missing or unsuitable terminal: %s", 410 name); 411 break; 412 case -1: 413 xasprintf(cause, "can't find terminfo database"); 414 break; 415 default: 416 xasprintf(cause, "unknown error"); 417 break; 418 } 419 goto error; 420 } 421 422 /* Fill in codes. */ 423 for (i = 0; i < tty_term_ncodes(); i++) { 424 ent = &tty_term_codes[i]; 425 426 code = &term->codes[i]; 427 code->type = TTYCODE_NONE; 428 switch (ent->type) { 429 case TTYCODE_NONE: 430 break; 431 case TTYCODE_STRING: 432 s = tigetstr((char *) ent->name); 433 if (s == NULL || s == (char *) -1) 434 break; 435 code->type = TTYCODE_STRING; 436 code->value.string = tty_term_strip(s); 437 break; 438 case TTYCODE_NUMBER: 439 n = tigetnum((char *) ent->name); 440 if (n == -1 || n == -2) 441 break; 442 code->type = TTYCODE_NUMBER; 443 code->value.number = n; 444 break; 445 case TTYCODE_FLAG: 446 n = tigetflag((char *) ent->name); 447 if (n == -1) 448 break; 449 code->type = TTYCODE_FLAG; 450 code->value.flag = n; 451 break; 452 } 453 } 454 455 /* Apply terminal overrides. */ 456 o = options_get_only(global_options, "terminal-overrides"); 457 if (options_array_size(o, &size) != -1) { 458 for (i = 0; i < size; i++) { 459 s = options_array_get(o, i); 460 if (s != NULL) 461 tty_term_override(term, s); 462 } 463 } 464 465 /* Delete curses data. */ 466 del_curterm(cur_term); 467 468 /* These are always required. */ 469 if (!tty_term_has(term, TTYC_CLEAR)) { 470 xasprintf(cause, "terminal does not support clear"); 471 goto error; 472 } 473 if (!tty_term_has(term, TTYC_CUP)) { 474 xasprintf(cause, "terminal does not support cup"); 475 goto error; 476 } 477 478 /* These can be emulated so one of the two is required. */ 479 if (!tty_term_has(term, TTYC_CUD1) && !tty_term_has(term, TTYC_CUD)) { 480 xasprintf(cause, "terminal does not support cud1 or cud"); 481 goto error; 482 } 483 484 /* Figure out if we have 256. */ 485 if (tty_term_number(term, TTYC_COLORS) == 256) 486 term->flags |= TERM_256COLOURS; 487 488 /* 489 * Terminals without xenl (eat newline glitch) wrap at at $COLUMNS - 1 490 * rather than $COLUMNS (the cursor can never be beyond $COLUMNS - 1). 491 * 492 * This is irritating, most notably because it is impossible to write 493 * to the very bottom-right of the screen without scrolling. 494 * 495 * Flag the terminal here and apply some workarounds in other places to 496 * do the best possible. 497 */ 498 if (!tty_term_flag(term, TTYC_XENL)) 499 term->flags |= TERM_EARLYWRAP; 500 501 /* Generate ACS table. If none is present, use nearest ASCII. */ 502 memset(term->acs, 0, sizeof term->acs); 503 if (tty_term_has(term, TTYC_ACSC)) 504 acs = tty_term_string(term, TTYC_ACSC); 505 else 506 acs = "a#j+k+l+m+n+o-p-q-r-s-t+u+v+w+x|y<z>~."; 507 for (; acs[0] != '\0' && acs[1] != '\0'; acs += 2) 508 term->acs[(u_char) acs[0]][0] = acs[1]; 509 510 /* On terminals with xterm titles (XT), fill in tsl and fsl. */ 511 if (tty_term_flag(term, TTYC_XT) && 512 !tty_term_has(term, TTYC_TSL) && 513 !tty_term_has(term, TTYC_FSL)) { 514 code = &term->codes[TTYC_TSL]; 515 code->value.string = xstrdup("\033]0;"); 516 code->type = TTYCODE_STRING; 517 code = &term->codes[TTYC_FSL]; 518 code->value.string = xstrdup("\007"); 519 code->type = TTYCODE_STRING; 520 } 521 522 return (term); 523 524 error: 525 tty_term_free(term); 526 return (NULL); 527 } 528 529 void 530 tty_term_free(struct tty_term *term) 531 { 532 u_int i; 533 534 if (--term->references != 0) 535 return; 536 537 LIST_REMOVE(term, entry); 538 539 for (i = 0; i < tty_term_ncodes(); i++) { 540 if (term->codes[i].type == TTYCODE_STRING) 541 free(term->codes[i].value.string); 542 } 543 free(term->codes); 544 545 free(term->name); 546 free(term); 547 } 548 549 int 550 tty_term_has(struct tty_term *term, enum tty_code_code code) 551 { 552 return (term->codes[code].type != TTYCODE_NONE); 553 } 554 555 const char * 556 tty_term_string(struct tty_term *term, enum tty_code_code code) 557 { 558 if (!tty_term_has(term, code)) 559 return (""); 560 if (term->codes[code].type != TTYCODE_STRING) 561 fatalx("not a string: %d", code); 562 return (term->codes[code].value.string); 563 } 564 565 const char * 566 tty_term_string1(struct tty_term *term, enum tty_code_code code, int a) 567 { 568 return (tparm((char *) tty_term_string(term, code), a)); 569 } 570 571 const char * 572 tty_term_string2(struct tty_term *term, enum tty_code_code code, int a, int b) 573 { 574 return (tparm((char *) tty_term_string(term, code), a, b)); 575 } 576 577 const char * 578 tty_term_ptr1(struct tty_term *term, enum tty_code_code code, const void *a) 579 { 580 return (tparm((char *) tty_term_string(term, code), a)); 581 } 582 583 const char * 584 tty_term_ptr2(struct tty_term *term, enum tty_code_code code, const void *a, 585 const void *b) 586 { 587 return (tparm((char *) tty_term_string(term, code), a, b)); 588 } 589 590 int 591 tty_term_number(struct tty_term *term, enum tty_code_code code) 592 { 593 if (!tty_term_has(term, code)) 594 return (0); 595 if (term->codes[code].type != TTYCODE_NUMBER) 596 fatalx("not a number: %d", code); 597 return (term->codes[code].value.number); 598 } 599 600 int 601 tty_term_flag(struct tty_term *term, enum tty_code_code code) 602 { 603 if (!tty_term_has(term, code)) 604 return (0); 605 if (term->codes[code].type != TTYCODE_FLAG) 606 fatalx("not a flag: %d", code); 607 return (term->codes[code].value.flag); 608 } 609 610 const char * 611 tty_term_describe(struct tty_term *term, enum tty_code_code code) 612 { 613 static char s[256]; 614 char out[128]; 615 616 switch (term->codes[code].type) { 617 case TTYCODE_NONE: 618 xsnprintf(s, sizeof s, "%4u: %s: [missing]", 619 code, tty_term_codes[code].name); 620 break; 621 case TTYCODE_STRING: 622 strnvis(out, term->codes[code].value.string, sizeof out, 623 VIS_OCTAL|VIS_TAB|VIS_NL); 624 xsnprintf(s, sizeof s, "%4u: %s: (string) %s", 625 code, tty_term_codes[code].name, 626 out); 627 break; 628 case TTYCODE_NUMBER: 629 xsnprintf(s, sizeof s, "%4u: %s: (number) %d", 630 code, tty_term_codes[code].name, 631 term->codes[code].value.number); 632 break; 633 case TTYCODE_FLAG: 634 xsnprintf(s, sizeof s, "%4u: %s: (flag) %s", 635 code, tty_term_codes[code].name, 636 term->codes[code].value.flag ? "true" : "false"); 637 break; 638 } 639 return (s); 640 } 641