format.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2011 Nicholas Marriott <nicm@users.sourceforge.net>
   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 <ctype.h>
  22 #include <errno.h>
  23 #include <netdb.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <time.h>
  28 #include <unistd.h>
  29
  30 #include "tmux.h"
  31
  32 /*
  33  * Build a list of key-value pairs and use them to expand #{key} entries in a
  34  * string.
  35  */
  36
  37 int      format_replace(struct format_tree *, const char *, size_t, char **,
  38              size_t *, size_t *);
  39 char    *format_get_command(struct window_pane *);
  40 void     format_window_pane_tabs(struct format_tree *, struct window_pane *);
  41
  42 /* Format key-value replacement entry. */
  43 RB_GENERATE(format_tree, format_entry, entry, format_cmp);
  44
  45 /* Format tree comparison function. */
  46 int
  47 format_cmp(struct format_entry *fe1, struct format_entry *fe2)
  48 {
  49         return (strcmp(fe1->key, fe2->key));
  50 }
  51
  52 /* Single-character uppercase aliases. */
  53 const char *format_upper[] = {
  54         NULL,           /* A */
  55         NULL,           /* B */
  56         NULL,           /* C */
  57         "pane_id",      /* D */
  58         NULL,           /* E */
  59         "window_flags", /* F */
  60         NULL,           /* G */
  61         "host",         /* H */
  62         "window_index", /* I */
  63         NULL,           /* J */
  64         NULL,           /* K */
  65         NULL,           /* L */
  66         NULL,           /* M */
  67         NULL,           /* N */
  68         NULL,           /* O */
  69         "pane_index",   /* P */
  70         NULL,           /* Q */
  71         NULL,           /* R */
  72         "session_name", /* S */
  73         "pane_title",   /* T */
  74         NULL,           /* U */
  75         NULL,           /* V */
  76         "window_name",  /* W */
  77         NULL,           /* X */
  78         NULL,           /* Y */
  79         NULL            /* Z */
  80 };
  81
  82 /* Single-character lowercase aliases. */
  83 const char *format_lower[] = {
  84         NULL,           /* a */
  85         NULL,           /* b */
  86         NULL,           /* c */
  87         NULL,           /* d */
  88         NULL,           /* e */
  89         NULL,           /* f */
  90         NULL,           /* g */
  91         "host_short",   /* h */
  92         NULL,           /* i */
  93         NULL,           /* j */
  94         NULL,           /* k */
  95         NULL,           /* l */
  96         NULL,           /* m */
  97         NULL,           /* n */
  98         NULL,           /* o */
  99         NULL,           /* p */
 100         NULL,           /* q */
 101         NULL,           /* r */
 102         NULL,           /* s */
 103         NULL,           /* t */
 104         NULL,           /* u */
 105         NULL,           /* v */
 106         NULL,           /* w */
 107         NULL,           /* x */
 108         NULL,           /* y */
 109         NULL            /* z */
 110 };
 111
 112 /* Create a new tree. */
 113 struct format_tree *
 114 format_create(void)
 115 {
 116         struct format_tree      *ft;
 117         char                     host[MAXHOSTNAMELEN], *ptr;
 118
 119         ft = xmalloc(sizeof *ft);
 120         RB_INIT(ft);
 121
 122         if (gethostname(host, sizeof host) == 0) {
 123                 format_add(ft, "host", "%s", host);
 124                 if ((ptr = strchr(host, '.')) != NULL)
 125                         *ptr = '\0';
 126                 format_add(ft, "host_short", "%s", host);
 127         }
 128
 129         return (ft);
 130 }
 131
 132 /* Free a tree. */
 133 void
 134 format_free(struct format_tree *ft)
 135 {
 136         struct format_entry     *fe, *fe_next;
 137
 138         fe_next = RB_MIN(format_tree, ft);
 139         while (fe_next != NULL) {
 140                 fe = fe_next;
 141                 fe_next = RB_NEXT(format_tree, ft, fe);
 142
 143                 RB_REMOVE(format_tree, ft, fe);
 144                 free(fe->value);
 145                 free(fe->key);
 146                 free(fe);
 147         }
 148
 149         free(ft);
 150 }
 151
 152 /* Add a key-value pair. */
 153 void
 154 format_add(struct format_tree *ft, const char *key, const char *fmt, ...)
 155 {
 156         struct format_entry     *fe;
 157         struct format_entry     *fe_now;
 158         va_list                  ap;
 159
 160         fe = xmalloc(sizeof *fe);
 161         fe->key = xstrdup(key);
 162
 163         va_start(ap, fmt);
 164         xvasprintf(&fe->value, fmt, ap);
 165         va_end(ap);
 166
 167         fe_now = RB_INSERT(format_tree, ft, fe);
 168         if (fe_now != NULL) {
 169                 free(fe_now->value);
 170                 fe_now->value = fe->value;
 171                 free(fe->key);
 172                 free(fe);
 173         }
 174 }
 175
 176 /* Find a format entry. */
 177 const char *
 178 format_find(struct format_tree *ft, const char *key)
 179 {
 180         struct format_entry     *fe, fe_find;
 181
 182         fe_find.key = (char *) key;
 183         fe = RB_FIND(format_tree, ft, &fe_find);
 184         if (fe == NULL)
 185                 return (NULL);
 186         return (fe->value);
 187 }
 188
 189 /*
 190  * Replace a key/value pair in buffer. #{blah} is expanded directly,
 191  * #{?blah,a,b} is replace with a if blah exists and is nonzero else b.
 192  */
 193 int
 194 format_replace(struct format_tree *ft, const char *key, size_t keylen,
 195     char **buf, size_t *len, size_t *off)
 196 {
 197         char            *copy, *copy0, *endptr, *ptr, *saved;
 198         const char      *value;
 199         size_t           valuelen;
 200         u_long           limit = ULONG_MAX;
 201
 202         /* Make a copy of the key. */
 203         copy0 = copy = xmalloc(keylen + 1);
 204         memcpy(copy, key, keylen);
 205         copy[keylen] = '\0';
 206
 207         /* Is there a length limit or whatnot? */
 208         if (!islower((u_char) *copy) && *copy != '?') {
 209                 while (*copy != ':' && *copy != '\0') {
 210                         switch (*copy) {
 211                         case '=':
 212                                 errno = 0;
 213                                 limit = strtoul(copy + 1, &endptr, 10);
 214                                 if (errno == ERANGE && limit == ULONG_MAX)
 215                                         goto fail;
 216                                 copy = endptr;
 217                                 break;
 218                         default:
 219                                 copy++;
 220                                 break;
 221                         }
 222                 }
 223                 if (*copy != ':')
 224                         goto fail;
 225                 copy++;
 226         }
 227
 228         /*
 229          * Is this a conditional? If so, check it exists and extract either the
 230          * first or second element. If not, look up the key directly.
 231          */
 232         if (*copy == '?') {
 233                 ptr = strchr(copy, ',');
 234                 if (ptr == NULL)
 235                         goto fail;
 236                 *ptr = '\0';
 237
 238                 value = format_find(ft, copy + 1);
 239                 if (value != NULL && (value[0] != '0' || value[1] != '\0')) {
 240                         value = ptr + 1;
 241                         ptr = strchr(value, ',');
 242                         if (ptr == NULL)
 243                                 goto fail;
 244                         *ptr = '\0';
 245                 } else {
 246                         ptr = strchr(ptr + 1, ',');
 247                         if (ptr == NULL)
 248                                 goto fail;
 249                         value = ptr + 1;
 250                 }
 251                 saved = format_expand(ft, value);
 252                 value = saved;
 253         } else {
 254                 value = format_find(ft, copy);
 255                 if (value == NULL)
 256                         value = "";
 257                 saved = NULL;
 258         }
 259         valuelen = strlen(value);
 260
 261         /* Truncate the value if needed. */
 262         if (valuelen > limit)
 263                 valuelen = limit;
 264
 265         /* Expand the buffer and copy in the value. */
 266         while (*len - *off < valuelen + 1) {
 267                 *buf = xrealloc(*buf, 2, *len);
 268                 *len *= 2;
 269         }
 270         memcpy(*buf + *off, value, valuelen);
 271         *off += valuelen;
 272
 273         free(saved);
 274         free(copy0);
 275         return (0);
 276
 277 fail:
 278         free(copy0);
 279         return (-1);
 280 }
 281
 282 /* Expand keys in a template. */
 283 char *
 284 format_expand(struct format_tree *ft, const char *fmt)
 285 {
 286         char            *buf;
 287         const char      *ptr, *s;
 288         size_t           off, len, n;
 289         int              ch, brackets;
 290
 291         len = 64;
 292         buf = xmalloc(len);
 293         off = 0;
 294
 295         while (*fmt != '\0') {
 296                 if (*fmt != '#') {
 297                         while (len - off < 2) {
 298                                 buf = xrealloc(buf, 2, len);
 299                                 len *= 2;
 300                         }
 301                         buf[off++] = *fmt++;
 302                         continue;
 303                 }
 304                 fmt++;
 305
 306                 ch = (u_char) *fmt++;
 307                 switch (ch) {
 308                 case '{':
 309                         brackets = 1;
 310                         for (ptr = fmt; *ptr != '\0'; ptr++) {
 311                                 if (*ptr == '{')
 312                                         brackets++;
 313                                 if (*ptr == '}' && --brackets == 0)
 314                                         break;
 315                         }
 316                         if (*ptr != '}' || brackets != 0)
 317                                 break;
 318                         n = ptr - fmt;
 319
 320                         if (format_replace(ft, fmt, n, &buf, &len, &off) != 0)
 321                                 break;
 322                         fmt += n + 1;
 323                         continue;
 324                 default:
 325                         s = NULL;
 326                         if (ch >= 'A' && ch <= 'Z')
 327                                 s = format_upper[ch - 'A'];
 328                         else if (ch >= 'a' && ch <= 'z')
 329                                 s = format_lower[ch - 'a'];
 330                         if (s == NULL) {
 331                                 while (len - off < 3) {
 332                                         buf = xrealloc(buf, 2, len);
 333                                         len *= 2;
 334                                 }
 335                                 buf[off++] = '#';
 336                                 buf[off++] = ch;
 337                                 continue;
 338                         }
 339                         n = strlen(s);
 340                         if (format_replace(ft, s, n, &buf, &len, &off) != 0)
 341                                 break;
 342                         continue;
 343                 }
 344
 345                 break;
 346         }
 347         buf[off] = '\0';
 348
 349         return (buf);
 350 }
 351
 352 /* Get command name for format. */
 353 char *
 354 format_get_command(struct window_pane *wp)
 355 {
 356         char    *cmd;
 357
 358         cmd = get_proc_name(wp->fd, wp->tty);
 359         if (cmd == NULL || *cmd == '\0') {
 360                 cmd = wp->cmd;
 361                 if (cmd == NULL || *cmd == '\0')
 362                         cmd = wp->shell;
 363         }
 364         return (parse_window_name(cmd));
 365 }
 366
 367 /* Set default format keys for a session. */
 368 void
 369 format_session(struct format_tree *ft, struct session *s)
 370 {
 371         struct session_group    *sg;
 372         char                    *tim;
 373         time_t                   t;
 374
 375         format_add(ft, "session_name", "%s", s->name);
 376         format_add(ft, "session_windows", "%u", winlink_count(&s->windows));
 377         format_add(ft, "session_width", "%u", s->sx);
 378         format_add(ft, "session_height", "%u", s->sy);
 379         format_add(ft, "session_id", "$%u", s->id);
 380
 381         sg = session_group_find(s);
 382         format_add(ft, "session_grouped", "%d", sg != NULL);
 383         if (sg != NULL)
 384                 format_add(ft, "session_group", "%u", session_group_index(sg));
 385
 386         t = s->creation_time.tv_sec;
 387         format_add(ft, "session_created", "%lld", (long long) t);
 388         tim = ctime(&t);
 389         *strchr(tim, '\n') = '\0';
 390         format_add(ft, "session_created_string", "%s", tim);
 391
 392         if (s->flags & SESSION_UNATTACHED)
 393                 format_add(ft, "session_attached", "%d", 0);
 394         else
 395                 format_add(ft, "session_attached", "%d", 1);
 396 }
 397
 398 /* Set default format keys for a client. */
 399 void
 400 format_client(struct format_tree *ft, struct client *c)
 401 {
 402         char            *tim;
 403         time_t           t;
 404         struct session  *s;
 405
 406         format_add(ft, "client_height", "%u", c->tty.sy);
 407         format_add(ft, "client_width", "%u", c->tty.sx);
 408         if (c->tty.path != NULL)
 409                 format_add(ft, "client_tty", "%s", c->tty.path);
 410         if (c->tty.termname != NULL)
 411                 format_add(ft, "client_termname", "%s", c->tty.termname);
 412
 413         t = c->creation_time.tv_sec;
 414         format_add(ft, "client_created", "%lld", (long long) t);
 415         tim = ctime(&t);
 416         *strchr(tim, '\n') = '\0';
 417         format_add(ft, "client_created_string", "%s", tim);
 418
 419         t = c->activity_time.tv_sec;
 420         format_add(ft, "client_activity", "%lld", (long long) t);
 421         tim = ctime(&t);
 422         *strchr(tim, '\n') = '\0';
 423         format_add(ft, "client_activity_string", "%s", tim);
 424
 425         format_add(ft, "client_prefix", "%d", !!(c->flags & CLIENT_PREFIX));
 426
 427         if (c->tty.flags & TTY_UTF8)
 428                 format_add(ft, "client_utf8", "%d", 1);
 429         else
 430                 format_add(ft, "client_utf8", "%d", 0);
 431
 432         if (c->flags & CLIENT_READONLY)
 433                 format_add(ft, "client_readonly", "%d", 1);
 434         else
 435                 format_add(ft, "client_readonly", "%d", 0);
 436
 437         s = c->session;
 438         if (s != NULL)
 439                 format_add(ft, "client_session", "%s", s->name);
 440         s = c->last_session;
 441         if (s != NULL && session_alive(s))
 442                 format_add(ft, "client_last_session", "%s", s->name);
 443 }
 444
 445 /* Set default format keys for a window. */
 446 void
 447 format_window(struct format_tree *ft, struct window *w)
 448 {
 449         char    *layout;
 450
 451         layout = layout_dump(w);
 452
 453         format_add(ft, "window_id", "@%u", w->id);
 454         format_add(ft, "window_name", "%s", w->name);
 455         format_add(ft, "window_width", "%u", w->sx);
 456         format_add(ft, "window_height", "%u", w->sy);
 457         format_add(ft, "window_layout", "%s", layout);
 458         format_add(ft, "window_panes", "%u", window_count_panes(w));
 459
 460         free(layout);
 461 }
 462
 463 /* Set default format keys for a winlink. */
 464 void
 465 format_winlink(struct format_tree *ft, struct session *s, struct winlink *wl)
 466 {
 467         struct window   *w = wl->window;
 468         char            *flags;
 469
 470         flags = window_printable_flags(s, wl);
 471
 472         format_window(ft, w);
 473
 474         format_add(ft, "window_index", "%d", wl->idx);
 475         format_add(ft, "window_flags", "%s", flags);
 476         format_add(ft, "window_active", "%d", wl == s->curw);
 477
 478         format_add(ft, "window_bell_flag", "%u",
 479             !!(wl->flags & WINLINK_BELL));
 480         format_add(ft, "window_content_flag", "%u",
 481             !!(wl->flags & WINLINK_CONTENT));
 482         format_add(ft, "window_activity_flag", "%u",
 483             !!(wl->flags & WINLINK_ACTIVITY));
 484         format_add(ft, "window_silence_flag", "%u",
 485             !!(wl->flags & WINLINK_SILENCE));
 486
 487
 488         free(flags);
 489 }
 490
 491 /* Add window pane tabs. */
 492 void
 493 format_window_pane_tabs(struct format_tree *ft, struct window_pane *wp)
 494 {
 495         struct evbuffer *buffer;
 496         u_int            i;
 497
 498         buffer = evbuffer_new();
 499         for (i = 0; i < wp->base.grid->sx; i++) {
 500                 if (!bit_test(wp->base.tabs, i))
 501                         continue;
 502
 503                 if (EVBUFFER_LENGTH(buffer) > 0)
 504                         evbuffer_add(buffer, ",", 1);
 505                 evbuffer_add_printf(buffer, "%d", i);
 506         }
 507
 508         format_add(ft, "pane_tabs", "%.*s", (int) EVBUFFER_LENGTH(buffer),
 509             EVBUFFER_DATA(buffer));
 510         evbuffer_free(buffer);
 511 }
 512
 513 /* Set default format keys for a window pane. */
 514 void
 515 format_window_pane(struct format_tree *ft, struct window_pane *wp)
 516 {
 517         struct grid             *gd = wp->base.grid;
 518         struct grid_line        *gl;
 519         unsigned long long       size;
 520         u_int                    i, idx;
 521         const char              *cwd;
 522         char                    *cmd;
 523
 524         size = 0;
 525         for (i = 0; i < gd->hsize; i++) {
 526                 gl = &gd->linedata[i];
 527                 size += gl->cellsize * sizeof *gl->celldata;
 528         }
 529         size += gd->hsize * sizeof *gd->linedata;
 530         format_add(ft, "history_size", "%u", gd->hsize);
 531         format_add(ft, "history_limit", "%u", gd->hlimit);
 532         format_add(ft, "history_bytes", "%llu", size);
 533
 534         if (window_pane_index(wp, &idx) != 0)
 535                 fatalx("index not found");
 536         format_add(ft, "pane_index", "%u", idx);
 537
 538         format_add(ft, "pane_width", "%u", wp->sx);
 539         format_add(ft, "pane_height", "%u", wp->sy);
 540         format_add(ft, "pane_title", "%s", wp->base.title);
 541         format_add(ft, "pane_id", "%%%u", wp->id);
 542         format_add(ft, "pane_active", "%d", wp == wp->window->active);
 543         format_add(ft, "pane_dead", "%d", wp->fd == -1);
 544
 545         format_add(ft, "pane_in_mode", "%d", wp->screen != &wp->base);
 546         format_add(ft, "pane_synchronized", "%d",
 547             !!options_get_number(&wp->window->options, "synchronize-panes"));
 548
 549         if (wp->tty != NULL)
 550                 format_add(ft, "pane_tty", "%s", wp->tty);
 551         format_add(ft, "pane_pid", "%ld", (long) wp->pid);
 552         if (wp->cmd != NULL)
 553                 format_add(ft, "pane_start_command", "%s", wp->cmd);
 554         if ((cwd = get_proc_cwd(wp->fd)) != NULL)
 555                 format_add(ft, "pane_current_path", "%s", cwd);
 556         if ((cmd = get_proc_name(wp->fd, wp->tty)) != NULL) {
 557                 format_add(ft, "pane_current_command", "%s", cmd);
 558                 free(cmd);
 559         }
 560
 561         format_add(ft, "cursor_x", "%d", wp->base.cx);
 562         format_add(ft, "cursor_y", "%d", wp->base.cy);
 563         format_add(ft, "scroll_region_upper", "%d", wp->base.rupper);
 564         format_add(ft, "scroll_region_lower", "%d", wp->base.rlower);
 565         format_add(ft, "saved_cursor_x", "%d", wp->ictx.old_cx);
 566         format_add(ft, "saved_cursor_y", "%d", wp->ictx.old_cy);
 567
 568         format_add(ft, "alternate_on", "%d", wp->saved_grid ? 1 : 0);
 569         format_add(ft, "alternate_saved_x", "%d", wp->saved_cx);
 570         format_add(ft, "alternate_saved_y", "%d", wp->saved_cy);
 571
 572         format_add(ft, "cursor_flag", "%d",
 573             !!(wp->base.mode & MODE_CURSOR));
 574         format_add(ft, "insert_flag", "%d",
 575             !!(wp->base.mode & MODE_INSERT));
 576         format_add(ft, "keypad_cursor_flag", "%d",
 577             !!(wp->base.mode & MODE_KCURSOR));
 578         format_add(ft, "keypad_flag", "%d",
 579             !!(wp->base.mode & MODE_KKEYPAD));
 580         format_add(ft, "wrap_flag", "%d",
 581             !!(wp->base.mode & MODE_WRAP));
 582
 583         format_add(ft, "mouse_standard_flag", "%d",
 584             !!(wp->base.mode & MODE_MOUSE_STANDARD));
 585         format_add(ft, "mouse_button_flag", "%d",
 586             !!(wp->base.mode & MODE_MOUSE_BUTTON));
 587         format_add(ft, "mouse_any_flag", "%d",
 588             !!(wp->base.mode & MODE_MOUSE_ANY));
 589         format_add(ft, "mouse_utf8_flag", "%d",
 590             !!(wp->base.mode & MODE_MOUSE_UTF8));
 591
 592         format_window_pane_tabs(ft, wp);
 593 }
 594
 595 /* Set default format keys for paste buffer. */
 596 void
 597 format_paste_buffer(struct format_tree *ft, struct paste_buffer *pb)
 598 {
 599         char    *pb_print = paste_print(pb, 50);
 600
 601         format_add(ft, "buffer_size", "%zu", pb->size);
 602         format_add(ft, "buffer_sample", "%s", pb_print);
 603
 604         free(pb_print);
 605 }