tty-term.c

   1 /* $OpenBSD$ */
   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 char     *tty_term_strip(const char *);
  31
  32 struct tty_terms tty_terms = LIST_HEAD_INITIALIZER(tty_terms);
  33
  34 enum tty_code_type {
  35         TTYCODE_NONE = 0,
  36         TTYCODE_STRING,
  37         TTYCODE_NUMBER,
  38         TTYCODE_FLAG,
  39 };
  40
  41 struct tty_code {
  42         enum tty_code_type      type;
  43         union {
  44                 char           *string;
  45                 int             number;
  46                 int             flag;
  47         } value;
  48 };
  49
  50 struct tty_term_code_entry {
  51         enum tty_code_type      type;
  52         const char             *name;
  53 };
  54
  55 static const struct tty_term_code_entry tty_term_codes[] = {
  56         [TTYC_ACSC] = { TTYCODE_STRING, "acsc" },
  57         [TTYC_AM] = { TTYCODE_FLAG, "am" },
  58         [TTYC_AX] = { TTYCODE_FLAG, "AX" },
  59         [TTYC_BCE] = { TTYCODE_FLAG, "bce" },
  60         [TTYC_BEL] = { TTYCODE_STRING, "bel" },
  61         [TTYC_BIDI] = { TTYCODE_STRING, "Bidi" },
  62         [TTYC_BLINK] = { TTYCODE_STRING, "blink" },
  63         [TTYC_BOLD] = { TTYCODE_STRING, "bold" },
  64         [TTYC_CIVIS] = { TTYCODE_STRING, "civis" },
  65         [TTYC_CLEAR] = { TTYCODE_STRING, "clear" },
  66         [TTYC_CLMG] = { TTYCODE_STRING, "Clmg" },
  67         [TTYC_CMG] = { TTYCODE_STRING, "Cmg" },
  68         [TTYC_CNORM] = { TTYCODE_STRING, "cnorm" },
  69         [TTYC_COLORS] = { TTYCODE_NUMBER, "colors" },
  70         [TTYC_CR] = { TTYCODE_STRING, "Cr" },
  71         [TTYC_CSR] = { TTYCODE_STRING, "csr" },
  72         [TTYC_CS] = { TTYCODE_STRING, "Cs" },
  73         [TTYC_CUB1] = { TTYCODE_STRING, "cub1" },
  74         [TTYC_CUB] = { TTYCODE_STRING, "cub" },
  75         [TTYC_CUD1] = { TTYCODE_STRING, "cud1" },
  76         [TTYC_CUD] = { TTYCODE_STRING, "cud" },
  77         [TTYC_CUF1] = { TTYCODE_STRING, "cuf1" },
  78         [TTYC_CUF] = { TTYCODE_STRING, "cuf" },
  79         [TTYC_CUP] = { TTYCODE_STRING, "cup" },
  80         [TTYC_CUU1] = { TTYCODE_STRING, "cuu1" },
  81         [TTYC_CUU] = { TTYCODE_STRING, "cuu" },
  82         [TTYC_CVVIS] = { TTYCODE_STRING, "cvvis" },
  83         [TTYC_DCH1] = { TTYCODE_STRING, "dch1" },
  84         [TTYC_DCH] = { TTYCODE_STRING, "dch" },
  85         [TTYC_DIM] = { TTYCODE_STRING, "dim" },
  86         [TTYC_DL1] = { TTYCODE_STRING, "dl1" },
  87         [TTYC_DL] = { TTYCODE_STRING, "dl" },
  88         [TTYC_DSEKS] = { TTYCODE_STRING, "Dseks" },
  89         [TTYC_DSFCS] = { TTYCODE_STRING, "Dsfcs" },
  90         [TTYC_DSBP] = { TTYCODE_STRING, "Dsbp" },
  91         [TTYC_DSMG] = { TTYCODE_STRING, "Dsmg" },
  92         [TTYC_E3] = { TTYCODE_STRING, "E3" },
  93         [TTYC_ECH] = { TTYCODE_STRING, "ech" },
  94         [TTYC_ED] = { TTYCODE_STRING, "ed" },
  95         [TTYC_EL1] = { TTYCODE_STRING, "el1" },
  96         [TTYC_EL] = { TTYCODE_STRING, "el" },
  97         [TTYC_ENACS] = { TTYCODE_STRING, "enacs" },
  98         [TTYC_ENBP] = { TTYCODE_STRING, "Enbp" },
  99         [TTYC_ENEKS] = { TTYCODE_STRING, "Eneks" },
 100         [TTYC_ENFCS] = { TTYCODE_STRING, "Enfcs" },
 101         [TTYC_ENMG] = { TTYCODE_STRING, "Enmg" },
 102         [TTYC_FSL] = { TTYCODE_STRING, "fsl" },
 103         [TTYC_HOME] = { TTYCODE_STRING, "home" },
 104         [TTYC_HPA] = { TTYCODE_STRING, "hpa" },
 105         [TTYC_ICH1] = { TTYCODE_STRING, "ich1" },
 106         [TTYC_ICH] = { TTYCODE_STRING, "ich" },
 107         [TTYC_IL1] = { TTYCODE_STRING, "il1" },
 108         [TTYC_IL] = { TTYCODE_STRING, "il" },
 109         [TTYC_INDN] = { TTYCODE_STRING, "indn" },
 110         [TTYC_INVIS] = { TTYCODE_STRING, "invis" },
 111         [TTYC_KCBT] = { TTYCODE_STRING, "kcbt" },
 112         [TTYC_KCUB1] = { TTYCODE_STRING, "kcub1" },
 113         [TTYC_KCUD1] = { TTYCODE_STRING, "kcud1" },
 114         [TTYC_KCUF1] = { TTYCODE_STRING, "kcuf1" },
 115         [TTYC_KCUU1] = { TTYCODE_STRING, "kcuu1" },
 116         [TTYC_KDC2] = { TTYCODE_STRING, "kDC" },
 117         [TTYC_KDC3] = { TTYCODE_STRING, "kDC3" },
 118         [TTYC_KDC4] = { TTYCODE_STRING, "kDC4" },
 119         [TTYC_KDC5] = { TTYCODE_STRING, "kDC5" },
 120         [TTYC_KDC6] = { TTYCODE_STRING, "kDC6" },
 121         [TTYC_KDC7] = { TTYCODE_STRING, "kDC7" },
 122         [TTYC_KDCH1] = { TTYCODE_STRING, "kdch1" },
 123         [TTYC_KDN2] = { TTYCODE_STRING, "kDN" }, /* not kDN2 */
 124         [TTYC_KDN3] = { TTYCODE_STRING, "kDN3" },
 125         [TTYC_KDN4] = { TTYCODE_STRING, "kDN4" },
 126         [TTYC_KDN5] = { TTYCODE_STRING, "kDN5" },
 127         [TTYC_KDN6] = { TTYCODE_STRING, "kDN6" },
 128         [TTYC_KDN7] = { TTYCODE_STRING, "kDN7" },
 129         [TTYC_KEND2] = { TTYCODE_STRING, "kEND" },
 130         [TTYC_KEND3] = { TTYCODE_STRING, "kEND3" },
 131         [TTYC_KEND4] = { TTYCODE_STRING, "kEND4" },
 132         [TTYC_KEND5] = { TTYCODE_STRING, "kEND5" },
 133         [TTYC_KEND6] = { TTYCODE_STRING, "kEND6" },
 134         [TTYC_KEND7] = { TTYCODE_STRING, "kEND7" },
 135         [TTYC_KEND] = { TTYCODE_STRING, "kend" },
 136         [TTYC_KF10] = { TTYCODE_STRING, "kf10" },
 137         [TTYC_KF11] = { TTYCODE_STRING, "kf11" },
 138         [TTYC_KF12] = { TTYCODE_STRING, "kf12" },
 139         [TTYC_KF13] = { TTYCODE_STRING, "kf13" },
 140         [TTYC_KF14] = { TTYCODE_STRING, "kf14" },
 141         [TTYC_KF15] = { TTYCODE_STRING, "kf15" },
 142         [TTYC_KF16] = { TTYCODE_STRING, "kf16" },
 143         [TTYC_KF17] = { TTYCODE_STRING, "kf17" },
 144         [TTYC_KF18] = { TTYCODE_STRING, "kf18" },
 145         [TTYC_KF19] = { TTYCODE_STRING, "kf19" },
 146         [TTYC_KF1] = { TTYCODE_STRING, "kf1" },
 147         [TTYC_KF20] = { TTYCODE_STRING, "kf20" },
 148         [TTYC_KF21] = { TTYCODE_STRING, "kf21" },
 149         [TTYC_KF22] = { TTYCODE_STRING, "kf22" },
 150         [TTYC_KF23] = { TTYCODE_STRING, "kf23" },
 151         [TTYC_KF24] = { TTYCODE_STRING, "kf24" },
 152         [TTYC_KF25] = { TTYCODE_STRING, "kf25" },
 153         [TTYC_KF26] = { TTYCODE_STRING, "kf26" },
 154         [TTYC_KF27] = { TTYCODE_STRING, "kf27" },
 155         [TTYC_KF28] = { TTYCODE_STRING, "kf28" },
 156         [TTYC_KF29] = { TTYCODE_STRING, "kf29" },
 157         [TTYC_KF2] = { TTYCODE_STRING, "kf2" },
 158         [TTYC_KF30] = { TTYCODE_STRING, "kf30" },
 159         [TTYC_KF31] = { TTYCODE_STRING, "kf31" },
 160         [TTYC_KF32] = { TTYCODE_STRING, "kf32" },
 161         [TTYC_KF33] = { TTYCODE_STRING, "kf33" },
 162         [TTYC_KF34] = { TTYCODE_STRING, "kf34" },
 163         [TTYC_KF35] = { TTYCODE_STRING, "kf35" },
 164         [TTYC_KF36] = { TTYCODE_STRING, "kf36" },
 165         [TTYC_KF37] = { TTYCODE_STRING, "kf37" },
 166         [TTYC_KF38] = { TTYCODE_STRING, "kf38" },
 167         [TTYC_KF39] = { TTYCODE_STRING, "kf39" },
 168         [TTYC_KF3] = { TTYCODE_STRING, "kf3" },
 169         [TTYC_KF40] = { TTYCODE_STRING, "kf40" },
 170         [TTYC_KF41] = { TTYCODE_STRING, "kf41" },
 171         [TTYC_KF42] = { TTYCODE_STRING, "kf42" },
 172         [TTYC_KF43] = { TTYCODE_STRING, "kf43" },
 173         [TTYC_KF44] = { TTYCODE_STRING, "kf44" },
 174         [TTYC_KF45] = { TTYCODE_STRING, "kf45" },
 175         [TTYC_KF46] = { TTYCODE_STRING, "kf46" },
 176         [TTYC_KF47] = { TTYCODE_STRING, "kf47" },
 177         [TTYC_KF48] = { TTYCODE_STRING, "kf48" },
 178         [TTYC_KF49] = { TTYCODE_STRING, "kf49" },
 179         [TTYC_KF4] = { TTYCODE_STRING, "kf4" },
 180         [TTYC_KF50] = { TTYCODE_STRING, "kf50" },
 181         [TTYC_KF51] = { TTYCODE_STRING, "kf51" },
 182         [TTYC_KF52] = { TTYCODE_STRING, "kf52" },
 183         [TTYC_KF53] = { TTYCODE_STRING, "kf53" },
 184         [TTYC_KF54] = { TTYCODE_STRING, "kf54" },
 185         [TTYC_KF55] = { TTYCODE_STRING, "kf55" },
 186         [TTYC_KF56] = { TTYCODE_STRING, "kf56" },
 187         [TTYC_KF57] = { TTYCODE_STRING, "kf57" },
 188         [TTYC_KF58] = { TTYCODE_STRING, "kf58" },
 189         [TTYC_KF59] = { TTYCODE_STRING, "kf59" },
 190         [TTYC_KF5] = { TTYCODE_STRING, "kf5" },
 191         [TTYC_KF60] = { TTYCODE_STRING, "kf60" },
 192         [TTYC_KF61] = { TTYCODE_STRING, "kf61" },
 193         [TTYC_KF62] = { TTYCODE_STRING, "kf62" },
 194         [TTYC_KF63] = { TTYCODE_STRING, "kf63" },
 195         [TTYC_KF6] = { TTYCODE_STRING, "kf6" },
 196         [TTYC_KF7] = { TTYCODE_STRING, "kf7" },
 197         [TTYC_KF8] = { TTYCODE_STRING, "kf8" },
 198         [TTYC_KF9] = { TTYCODE_STRING, "kf9" },
 199         [TTYC_KHOM2] = { TTYCODE_STRING, "kHOM" },
 200         [TTYC_KHOM3] = { TTYCODE_STRING, "kHOM3" },
 201         [TTYC_KHOM4] = { TTYCODE_STRING, "kHOM4" },
 202         [TTYC_KHOM5] = { TTYCODE_STRING, "kHOM5" },
 203         [TTYC_KHOM6] = { TTYCODE_STRING, "kHOM6" },
 204         [TTYC_KHOM7] = { TTYCODE_STRING, "kHOM7" },
 205         [TTYC_KHOME] = { TTYCODE_STRING, "khome" },
 206         [TTYC_KIC2] = { TTYCODE_STRING, "kIC" },
 207         [TTYC_KIC3] = { TTYCODE_STRING, "kIC3" },
 208         [TTYC_KIC4] = { TTYCODE_STRING, "kIC4" },
 209         [TTYC_KIC5] = { TTYCODE_STRING, "kIC5" },
 210         [TTYC_KIC6] = { TTYCODE_STRING, "kIC6" },
 211         [TTYC_KIC7] = { TTYCODE_STRING, "kIC7" },
 212         [TTYC_KICH1] = { TTYCODE_STRING, "kich1" },
 213         [TTYC_KIND] = { TTYCODE_STRING, "kind" },
 214         [TTYC_KLFT2] = { TTYCODE_STRING, "kLFT" },
 215         [TTYC_KLFT3] = { TTYCODE_STRING, "kLFT3" },
 216         [TTYC_KLFT4] = { TTYCODE_STRING, "kLFT4" },
 217         [TTYC_KLFT5] = { TTYCODE_STRING, "kLFT5" },
 218         [TTYC_KLFT6] = { TTYCODE_STRING, "kLFT6" },
 219         [TTYC_KLFT7] = { TTYCODE_STRING, "kLFT7" },
 220         [TTYC_KMOUS] = { TTYCODE_STRING, "kmous" },
 221         [TTYC_KNP] = { TTYCODE_STRING, "knp" },
 222         [TTYC_KNXT2] = { TTYCODE_STRING, "kNXT" },
 223         [TTYC_KNXT3] = { TTYCODE_STRING, "kNXT3" },
 224         [TTYC_KNXT4] = { TTYCODE_STRING, "kNXT4" },
 225         [TTYC_KNXT5] = { TTYCODE_STRING, "kNXT5" },
 226         [TTYC_KNXT6] = { TTYCODE_STRING, "kNXT6" },
 227         [TTYC_KNXT7] = { TTYCODE_STRING, "kNXT7" },
 228         [TTYC_KPP] = { TTYCODE_STRING, "kpp" },
 229         [TTYC_KPRV2] = { TTYCODE_STRING, "kPRV" },
 230         [TTYC_KPRV3] = { TTYCODE_STRING, "kPRV3" },
 231         [TTYC_KPRV4] = { TTYCODE_STRING, "kPRV4" },
 232         [TTYC_KPRV5] = { TTYCODE_STRING, "kPRV5" },
 233         [TTYC_KPRV6] = { TTYCODE_STRING, "kPRV6" },
 234         [TTYC_KPRV7] = { TTYCODE_STRING, "kPRV7" },
 235         [TTYC_KRIT2] = { TTYCODE_STRING, "kRIT" },
 236         [TTYC_KRIT3] = { TTYCODE_STRING, "kRIT3" },
 237         [TTYC_KRIT4] = { TTYCODE_STRING, "kRIT4" },
 238         [TTYC_KRIT5] = { TTYCODE_STRING, "kRIT5" },
 239         [TTYC_KRIT6] = { TTYCODE_STRING, "kRIT6" },
 240         [TTYC_KRIT7] = { TTYCODE_STRING, "kRIT7" },
 241         [TTYC_KRI] = { TTYCODE_STRING, "kri" },
 242         [TTYC_KUP2] = { TTYCODE_STRING, "kUP" }, /* not kUP2 */
 243         [TTYC_KUP3] = { TTYCODE_STRING, "kUP3" },
 244         [TTYC_KUP4] = { TTYCODE_STRING, "kUP4" },
 245         [TTYC_KUP5] = { TTYCODE_STRING, "kUP5" },
 246         [TTYC_KUP6] = { TTYCODE_STRING, "kUP6" },
 247         [TTYC_KUP7] = { TTYCODE_STRING, "kUP7" },
 248         [TTYC_MS] = { TTYCODE_STRING, "Ms" },
 249         [TTYC_OL] = { TTYCODE_STRING, "ol" },
 250         [TTYC_OP] = { TTYCODE_STRING, "op" },
 251         [TTYC_RECT] = { TTYCODE_STRING, "Rect" },
 252         [TTYC_REV] = { TTYCODE_STRING, "rev" },
 253         [TTYC_RGB] = { TTYCODE_FLAG, "RGB" },
 254         [TTYC_RIN] = { TTYCODE_STRING, "rin" },
 255         [TTYC_RI] = { TTYCODE_STRING, "ri" },
 256         [TTYC_RMACS] = { TTYCODE_STRING, "rmacs" },
 257         [TTYC_RMCUP] = { TTYCODE_STRING, "rmcup" },
 258         [TTYC_RMKX] = { TTYCODE_STRING, "rmkx" },
 259         [TTYC_SETAB] = { TTYCODE_STRING, "setab" },
 260         [TTYC_SETAF] = { TTYCODE_STRING, "setaf" },
 261         [TTYC_SETAL] = { TTYCODE_STRING, "setal" },
 262         [TTYC_SETRGBB] = { TTYCODE_STRING, "setrgbb" },
 263         [TTYC_SETRGBF] = { TTYCODE_STRING, "setrgbf" },
 264         [TTYC_SETULC] = { TTYCODE_STRING, "Setulc" },
 265         [TTYC_SE] = { TTYCODE_STRING, "Se" },
 266         [TTYC_SGR0] = { TTYCODE_STRING, "sgr0" },
 267         [TTYC_SITM] = { TTYCODE_STRING, "sitm" },
 268         [TTYC_SMACS] = { TTYCODE_STRING, "smacs" },
 269         [TTYC_SMCUP] = { TTYCODE_STRING, "smcup" },
 270         [TTYC_SMKX] = { TTYCODE_STRING, "smkx" },
 271         [TTYC_SMOL] = { TTYCODE_STRING, "Smol" },
 272         [TTYC_SMSO] = { TTYCODE_STRING, "smso" },
 273         [TTYC_SMULX] = { TTYCODE_STRING, "Smulx" },
 274         [TTYC_SMUL] = { TTYCODE_STRING, "smul" },
 275         [TTYC_SMXX] =  { TTYCODE_STRING, "smxx" },
 276         [TTYC_SS] = { TTYCODE_STRING, "Ss" },
 277         [TTYC_SYNC] = { TTYCODE_STRING, "Sync" },
 278         [TTYC_TC] = { TTYCODE_FLAG, "Tc" },
 279         [TTYC_TSL] = { TTYCODE_STRING, "tsl" },
 280         [TTYC_U8] = { TTYCODE_NUMBER, "U8" },
 281         [TTYC_VPA] = { TTYCODE_STRING, "vpa" },
 282         [TTYC_XT] = { TTYCODE_FLAG, "XT" }
 283 };
 284
 285 u_int
 286 tty_term_ncodes(void)
 287 {
 288         return (nitems(tty_term_codes));
 289 }
 290
 291 static char *
 292 tty_term_strip(const char *s)
 293 {
 294         const char     *ptr;
 295         static char     buf[8192];
 296         size_t          len;
 297
 298         /* Ignore strings with no padding. */
 299         if (strchr(s, '$') == NULL)
 300                 return (xstrdup(s));
 301
 302         len = 0;
 303         for (ptr = s; *ptr != '\0'; ptr++) {
 304                 if (*ptr == '$' && *(ptr + 1) == '<') {
 305                         while (*ptr != '\0' && *ptr != '>')
 306                                 ptr++;
 307                         if (*ptr == '>')
 308                                 ptr++;
 309                         if (*ptr == '\0')
 310                                 break;
 311                 }
 312
 313                 buf[len++] = *ptr;
 314                 if (len == (sizeof buf) - 1)
 315                         break;
 316         }
 317         buf[len] = '\0';
 318
 319         return (xstrdup(buf));
 320 }
 321
 322 static char *
 323 tty_term_override_next(const char *s, size_t *offset)
 324 {
 325         static char     value[8192];
 326         size_t          n = 0, at = *offset;
 327
 328         if (s[at] == '\0')
 329                 return (NULL);
 330
 331         while (s[at] != '\0') {
 332                 if (s[at] == ':') {
 333                         if (s[at + 1] == ':') {
 334                                 value[n++] = ':';
 335                                 at += 2;
 336                         } else
 337                                 break;
 338                 } else {
 339                         value[n++] = s[at];
 340                         at++;
 341                 }
 342                 if (n == (sizeof value) - 1)
 343                         return (NULL);
 344         }
 345         if (s[at] != '\0')
 346                 *offset = at + 1;
 347         else
 348                 *offset = at;
 349         value[n] = '\0';
 350         return (value);
 351 }
 352
 353 void
 354 tty_term_apply(struct tty_term *term, const char *capabilities, int quiet)
 355 {
 356         const struct tty_term_code_entry        *ent;
 357         struct tty_code                         *code;
 358         size_t                                   offset = 0;
 359         char                                    *cp, *value, *s;
 360         const char                              *errstr, *name = term->name;
 361         u_int                                    i;
 362         int                                      n, remove;
 363
 364         while ((s = tty_term_override_next(capabilities, &offset)) != NULL) {
 365                 if (*s == '\0')
 366                         continue;
 367                 value = NULL;
 368
 369                 remove = 0;
 370                 if ((cp = strchr(s, '=')) != NULL) {
 371                         *cp++ = '\0';
 372                         value = xstrdup(cp);
 373                         if (strunvis(value, cp) == -1) {
 374                                 free(value);
 375                                 value = xstrdup(cp);
 376                         }
 377                 } else if (s[strlen(s) - 1] == '@') {
 378                         s[strlen(s) - 1] = '\0';
 379                         remove = 1;
 380                 } else
 381                         value = xstrdup("");
 382
 383                 if (!quiet) {
 384                         if (remove)
 385                                 log_debug("%s override: %s@", name, s);
 386                         else if (*value == '\0')
 387                                 log_debug("%s override: %s", name, s);
 388                         else
 389                                 log_debug("%s override: %s=%s", name, s, value);
 390                 }
 391
 392                 for (i = 0; i < tty_term_ncodes(); i++) {
 393                         ent = &tty_term_codes[i];
 394                         if (strcmp(s, ent->name) != 0)
 395                                 continue;
 396                         code = &term->codes[i];
 397
 398                         if (remove) {
 399                                 code->type = TTYCODE_NONE;
 400                                 continue;
 401                         }
 402                         switch (ent->type) {
 403                         case TTYCODE_NONE:
 404                                 break;
 405                         case TTYCODE_STRING:
 406                                 if (code->type == TTYCODE_STRING)
 407                                         free(code->value.string);
 408                                 code->value.string = xstrdup(value);
 409                                 code->type = ent->type;
 410                                 break;
 411                         case TTYCODE_NUMBER:
 412                                 n = strtonum(value, 0, INT_MAX, &errstr);
 413                                 if (errstr != NULL)
 414                                         break;
 415                                 code->value.number = n;
 416                                 code->type = ent->type;
 417                                 break;
 418                         case TTYCODE_FLAG:
 419                                 code->value.flag = 1;
 420                                 code->type = ent->type;
 421                                 break;
 422                         }
 423                 }
 424
 425                 free(value);
 426         }
 427 }
 428
 429 void
 430 tty_term_apply_overrides(struct tty_term *term)
 431 {
 432         struct options_entry            *o;
 433         struct options_array_item       *a;
 434         union options_value             *ov;
 435         const char                      *s, *acs;
 436         size_t                           offset;
 437         char                            *first;
 438
 439         /* Update capabilities from the option. */
 440         o = options_get_only(global_options, "terminal-overrides");
 441         a = options_array_first(o);
 442         while (a != NULL) {
 443                 ov = options_array_item_value(a);
 444                 s = ov->string;
 445
 446                 offset = 0;
 447                 first = tty_term_override_next(s, &offset);
 448                 if (first != NULL && fnmatch(first, term->name, 0) == 0)
 449                         tty_term_apply(term, s + offset, 0);
 450                 a = options_array_next(a);
 451         }
 452
 453         /* Update the RGB flag if the terminal has RGB colours. */
 454         if (tty_term_has(term, TTYC_SETRGBF) &&
 455             tty_term_has(term, TTYC_SETRGBB))
 456                 term->flags |= TERM_RGBCOLOURS;
 457         else
 458                 term->flags &= ~TERM_RGBCOLOURS;
 459         log_debug("RGBCOLOURS flag is %d", !!(term->flags & TERM_RGBCOLOURS));
 460
 461         /*
 462          * Set or clear the DECSLRM flag if the terminal has the margin
 463          * capabilities.
 464          */
 465         if (tty_term_has(term, TTYC_CMG) && tty_term_has(term, TTYC_CLMG))
 466                 term->flags |= TERM_DECSLRM;
 467         else
 468                 term->flags &= ~TERM_DECSLRM;
 469         log_debug("DECSLRM flag is %d", !!(term->flags & TERM_DECSLRM));
 470
 471         /*
 472          * Set or clear the DECFRA flag if the terminal has the rectangle
 473          * capability.
 474          */
 475         if (tty_term_has(term, TTYC_RECT))
 476                 term->flags |= TERM_DECFRA;
 477         else
 478                 term->flags &= ~TERM_DECFRA;
 479         log_debug("DECFRA flag is %d", !!(term->flags & TERM_DECFRA));
 480
 481         /*
 482          * Terminals without am (auto right margin) wrap at at $COLUMNS - 1
 483          * rather than $COLUMNS (the cursor can never be beyond $COLUMNS - 1).
 484          *
 485          * Terminals without xenl (eat newline glitch) ignore a newline beyond
 486          * the right edge of the terminal, but tmux doesn't care about this -
 487          * it always uses absolute only moves the cursor with a newline when
 488          * also sending a linefeed.
 489          *
 490          * This is irritating, most notably because it is painful to write to
 491          * the very bottom-right of the screen without scrolling.
 492          *
 493          * Flag the terminal here and apply some workarounds in other places to
 494          * do the best possible.
 495          */
 496         if (!tty_term_flag(term, TTYC_AM))
 497                 term->flags |= TERM_NOAM;
 498         else
 499                 term->flags &= ~TERM_NOAM;
 500         log_debug("NOAM flag is %d", !!(term->flags & TERM_NOAM));
 501
 502         /* Generate ACS table. If none is present, use nearest ASCII. */
 503         memset(term->acs, 0, sizeof term->acs);
 504         if (tty_term_has(term, TTYC_ACSC))
 505                 acs = tty_term_string(term, TTYC_ACSC);
 506         else
 507                 acs = "a#j+k+l+m+n+o-p-q-r-s-t+u+v+w+x|y<z>~.";
 508         for (; acs[0] != '\0' && acs[1] != '\0'; acs += 2)
 509                 term->acs[(u_char) acs[0]][0] = acs[1];
 510 }
 511
 512 struct tty_term *
 513 tty_term_create(struct tty *tty, char *name, char **caps, u_int ncaps,
 514     int *feat, char **cause)
 515 {
 516         struct tty_term                         *term;
 517         const struct tty_term_code_entry        *ent;
 518         struct tty_code                         *code;
 519         struct options_entry                    *o;
 520         struct options_array_item               *a;
 521         union options_value                     *ov;
 522         u_int                                    i, j;
 523         const char                              *s, *value;
 524         size_t                                   offset, namelen;
 525         char                                    *first;
 526
 527         log_debug("adding term %s", name);
 528
 529         term = xcalloc(1, sizeof *term);
 530         term->tty = tty;
 531         term->name = xstrdup(name);
 532         term->codes = xcalloc(tty_term_ncodes(), sizeof *term->codes);
 533         LIST_INSERT_HEAD(&tty_terms, term, entry);
 534
 535         /* Fill in codes. */
 536         for (i = 0; i < ncaps; i++) {
 537                 namelen = strcspn(caps[i], "=");
 538                 if (namelen == 0)
 539                         continue;
 540                 value = caps[i] + namelen + 1;
 541
 542                 for (j = 0; j < tty_term_ncodes(); j++) {
 543                         ent = &tty_term_codes[j];
 544                         if (strncmp(ent->name, caps[i], namelen) != 0)
 545                                 continue;
 546                         if (ent->name[namelen] != '\0')
 547                                 continue;
 548
 549                         code = &term->codes[j];
 550                         code->type = TTYCODE_NONE;
 551                         switch (ent->type) {
 552                         case TTYCODE_NONE:
 553                                 break;
 554                         case TTYCODE_STRING:
 555                                 code->type = TTYCODE_STRING;
 556                                 code->value.string = tty_term_strip(value);
 557                                 break;
 558                         case TTYCODE_NUMBER:
 559                                 code->type = TTYCODE_NUMBER;
 560                                 code->value.number = atoi(value);
 561                                 break;
 562                         case TTYCODE_FLAG:
 563                                 code->type = TTYCODE_FLAG;
 564                                 code->value.flag = (*value == '1');
 565                                 break;
 566                         }
 567                 }
 568         }
 569
 570         /* Apply terminal features. */
 571         o = options_get_only(global_options, "terminal-features");
 572         a = options_array_first(o);
 573         while (a != NULL) {
 574                 ov = options_array_item_value(a);
 575                 s = ov->string;
 576
 577                 offset = 0;
 578                 first = tty_term_override_next(s, &offset);
 579                 if (first != NULL && fnmatch(first, term->name, 0) == 0)
 580                         tty_add_features(feat, s + offset, ":");
 581                 a = options_array_next(a);
 582         }
 583
 584         /* Apply overrides so any capabilities used for features are changed. */
 585         tty_term_apply_overrides(term);
 586
 587         /* These are always required. */
 588         if (!tty_term_has(term, TTYC_CLEAR)) {
 589                 xasprintf(cause, "terminal does not support clear");
 590                 goto error;
 591         }
 592         if (!tty_term_has(term, TTYC_CUP)) {
 593                 xasprintf(cause, "terminal does not support cup");
 594                 goto error;
 595         }
 596
 597         /*
 598          * If TERM has XT or clear starts with CSI then it is safe to assume
 599          * the terminal is derived from the VT100. This controls whether device
 600          * attributes requests are sent to get more information.
 601          *
 602          * This is a bit of a hack but there aren't that many alternatives.
 603          * Worst case tmux will just fall back to using whatever terminfo(5)
 604          * says without trying to correct anything that is missing.
 605          *
 606          * Also add few features that VT100-like terminals should either
 607          * support or safely ignore.
 608          */
 609         s = tty_term_string(term, TTYC_CLEAR);
 610         if (tty_term_flag(term, TTYC_XT) || strncmp(s, "\033[", 2) == 0) {
 611                 term->flags |= TERM_VT100LIKE;
 612                 tty_add_features(feat, "bpaste,focus,title", ",");
 613         }
 614
 615         /* Add RGB feature if terminal has RGB colours. */
 616         if ((tty_term_flag(term, TTYC_TC) || tty_term_has(term, TTYC_RGB)) &&
 617             (!tty_term_has(term, TTYC_SETRGBF) ||
 618             !tty_term_has(term, TTYC_SETRGBB)))
 619                 tty_add_features(feat, "RGB", ",");
 620
 621         /* Apply the features and overrides again. */
 622         if (tty_apply_features(term, *feat))
 623                 tty_term_apply_overrides(term);
 624
 625         /* Log the capabilities. */
 626         for (i = 0; i < tty_term_ncodes(); i++)
 627                 log_debug("%s%s", name, tty_term_describe(term, i));
 628
 629         return (term);
 630
 631 error:
 632         tty_term_free(term);
 633         return (NULL);
 634 }
 635
 636 void
 637 tty_term_free(struct tty_term *term)
 638 {
 639         u_int   i;
 640
 641         log_debug("removing term %s", term->name);
 642
 643         for (i = 0; i < tty_term_ncodes(); i++) {
 644                 if (term->codes[i].type == TTYCODE_STRING)
 645                         free(term->codes[i].value.string);
 646         }
 647         free(term->codes);
 648
 649         LIST_REMOVE(term, entry);
 650         free(term->name);
 651         free(term);
 652 }
 653
 654 int
 655 tty_term_read_list(const char *name, int fd, char ***caps, u_int *ncaps,
 656     char **cause)
 657 {
 658         const struct tty_term_code_entry        *ent;
 659         int                                      error, n;
 660         u_int                                    i;
 661         const char                              *s;
 662         char                                     tmp[11];
 663
 664         if (setupterm((char *)name, fd, &error) != OK) {
 665                 switch (error) {
 666                 case 1:
 667                         xasprintf(cause, "can't use hardcopy terminal: %s",
 668                             name);
 669                         break;
 670                 case 0:
 671                         xasprintf(cause, "missing or unsuitable terminal: %s",
 672                             name);
 673                         break;
 674                 case -1:
 675                         xasprintf(cause, "can't find terminfo database");
 676                         break;
 677                 default:
 678                         xasprintf(cause, "unknown error");
 679                         break;
 680                 }
 681                 return (-1);
 682         }
 683
 684         *ncaps = 0;
 685         *caps = NULL;
 686
 687         for (i = 0; i < tty_term_ncodes(); i++) {
 688                 ent = &tty_term_codes[i];
 689                 switch (ent->type) {
 690                 case TTYCODE_NONE:
 691                         continue;
 692                 case TTYCODE_STRING:
 693                         s = tigetstr((char *)ent->name);
 694                         if (s == NULL || s == (char *)-1)
 695                                 continue;
 696                         break;
 697                 case TTYCODE_NUMBER:
 698                         n = tigetnum((char *)ent->name);
 699                         if (n == -1 || n == -2)
 700                                 continue;
 701                         xsnprintf(tmp, sizeof tmp, "%d", n);
 702                         s = tmp;
 703                         break;
 704                 case TTYCODE_FLAG:
 705                         n = tigetflag((char *) ent->name);
 706                         if (n == -1)
 707                                 continue;
 708                         if (n)
 709                                 s = "1";
 710                         else
 711                                 s = "0";
 712                         break;
 713                 }
 714                 *caps = xreallocarray(*caps, (*ncaps) + 1, sizeof **caps);
 715                 xasprintf(&(*caps)[*ncaps], "%s=%s", ent->name, s);
 716                 (*ncaps)++;
 717         }
 718
 719         del_curterm(cur_term);
 720         return (0);
 721 }
 722
 723 void
 724 tty_term_free_list(char **caps, u_int ncaps)
 725 {
 726         u_int   i;
 727
 728         for (i = 0; i < ncaps; i++)
 729                 free(caps[i]);
 730         free(caps);
 731 }
 732
 733 int
 734 tty_term_has(struct tty_term *term, enum tty_code_code code)
 735 {
 736         return (term->codes[code].type != TTYCODE_NONE);
 737 }
 738
 739 const char *
 740 tty_term_string(struct tty_term *term, enum tty_code_code code)
 741 {
 742         if (!tty_term_has(term, code))
 743                 return ("");
 744         if (term->codes[code].type != TTYCODE_STRING)
 745                 fatalx("not a string: %d", code);
 746         return (term->codes[code].value.string);
 747 }
 748
 749 const char *
 750 tty_term_string1(struct tty_term *term, enum tty_code_code code, int a)
 751 {
 752         return (tparm((char *) tty_term_string(term, code), a));
 753 }
 754
 755 const char *
 756 tty_term_string2(struct tty_term *term, enum tty_code_code code, int a, int b)
 757 {
 758         return (tparm((char *) tty_term_string(term, code), a, b));
 759 }
 760
 761 const char *
 762 tty_term_string3(struct tty_term *term, enum tty_code_code code, int a, int b,
 763     int c)
 764 {
 765         return (tparm((char *) tty_term_string(term, code), a, b, c));
 766 }
 767
 768 const char *
 769 tty_term_ptr1(struct tty_term *term, enum tty_code_code code, const void *a)
 770 {
 771         return (tparm((char *) tty_term_string(term, code), a));
 772 }
 773
 774 const char *
 775 tty_term_ptr2(struct tty_term *term, enum tty_code_code code, const void *a,
 776     const void *b)
 777 {
 778         return (tparm((char *) tty_term_string(term, code), a, b));
 779 }
 780
 781 int
 782 tty_term_number(struct tty_term *term, enum tty_code_code code)
 783 {
 784         if (!tty_term_has(term, code))
 785                 return (0);
 786         if (term->codes[code].type != TTYCODE_NUMBER)
 787                 fatalx("not a number: %d", code);
 788         return (term->codes[code].value.number);
 789 }
 790
 791 int
 792 tty_term_flag(struct tty_term *term, enum tty_code_code code)
 793 {
 794         if (!tty_term_has(term, code))
 795                 return (0);
 796         if (term->codes[code].type != TTYCODE_FLAG)
 797                 fatalx("not a flag: %d", code);
 798         return (term->codes[code].value.flag);
 799 }
 800
 801 const char *
 802 tty_term_describe(struct tty_term *term, enum tty_code_code code)
 803 {
 804         static char      s[256];
 805         char             out[128];
 806
 807         switch (term->codes[code].type) {
 808         case TTYCODE_NONE:
 809                 xsnprintf(s, sizeof s, "%4u: %s: [missing]",
 810                     code, tty_term_codes[code].name);
 811                 break;
 812         case TTYCODE_STRING:
 813                 strnvis(out, term->codes[code].value.string, sizeof out,
 814                     VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
 815                 xsnprintf(s, sizeof s, "%4u: %s: (string) %s",
 816                     code, tty_term_codes[code].name,
 817                     out);
 818                 break;
 819         case TTYCODE_NUMBER:
 820                 xsnprintf(s, sizeof s, "%4u: %s: (number) %d",
 821                     code, tty_term_codes[code].name,
 822                     term->codes[code].value.number);
 823                 break;
 824         case TTYCODE_FLAG:
 825                 xsnprintf(s, sizeof s, "%4u: %s: (flag) %s",
 826                     code, tty_term_codes[code].name,
 827                     term->codes[code].value.flag ? "true" : "false");
 828                 break;
 829         }
 830         return (s);
 831 }