1 /* $OpenBSD: server-fn.c,v 1.68 2013/03/25 11:36:59 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 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 <stdlib.h> 22 #include <string.h> 23 #include <time.h> 24 #include <unistd.h> 25 26 #include "tmux.h" 27 28 struct session *server_next_session(struct session *); 29 void server_callback_identify(int, short, void *); 30 31 void 32 server_fill_environ(struct session *s, struct environ *env) 33 { 34 char var[MAXPATHLEN], *term; 35 u_int idx; 36 long pid; 37 38 if (s != NULL) { 39 term = options_get_string(&s->options, "default-terminal"); 40 environ_set(env, "TERM", term); 41 42 idx = s->id; 43 } else 44 idx = -1; 45 pid = getpid(); 46 xsnprintf(var, sizeof var, "%s,%ld,%d", socket_path, pid, idx); 47 environ_set(env, "TMUX", var); 48 } 49 50 void 51 server_write_ready(struct client *c) 52 { 53 if (c->flags & CLIENT_CONTROL) 54 return; 55 server_write_client(c, MSG_READY, NULL, 0); 56 } 57 58 int 59 server_write_client( 60 struct client *c, enum msgtype type, const void *buf, size_t len) 61 { 62 struct imsgbuf *ibuf = &c->ibuf; 63 int error; 64 65 if (c->flags & CLIENT_BAD) 66 return (-1); 67 log_debug("writing %d to client %d", type, c->ibuf.fd); 68 error = imsg_compose(ibuf, type, PROTOCOL_VERSION, -1, -1, 69 (void *) buf, len); 70 if (error == 1) 71 server_update_event(c); 72 return (error == 1 ? 0 : -1); 73 } 74 75 void 76 server_write_session( 77 struct session *s, enum msgtype type, const void *buf, size_t len) 78 { 79 struct client *c; 80 u_int i; 81 82 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 83 c = ARRAY_ITEM(&clients, i); 84 if (c == NULL || c->session == NULL) 85 continue; 86 if (c->session == s) 87 server_write_client(c, type, buf, len); 88 } 89 } 90 91 void 92 server_redraw_client(struct client *c) 93 { 94 c->flags |= CLIENT_REDRAW; 95 } 96 97 void 98 server_status_client(struct client *c) 99 { 100 c->flags |= CLIENT_STATUS; 101 } 102 103 void 104 server_redraw_session(struct session *s) 105 { 106 struct client *c; 107 u_int i; 108 109 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 110 c = ARRAY_ITEM(&clients, i); 111 if (c == NULL || c->session == NULL) 112 continue; 113 if (c->session == s) 114 server_redraw_client(c); 115 } 116 } 117 118 void 119 server_redraw_session_group(struct session *s) 120 { 121 struct session_group *sg; 122 123 if ((sg = session_group_find(s)) == NULL) 124 server_redraw_session(s); 125 else { 126 TAILQ_FOREACH(s, &sg->sessions, gentry) 127 server_redraw_session(s); 128 } 129 } 130 131 void 132 server_status_session(struct session *s) 133 { 134 struct client *c; 135 u_int i; 136 137 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 138 c = ARRAY_ITEM(&clients, i); 139 if (c == NULL || c->session == NULL) 140 continue; 141 if (c->session == s) 142 server_status_client(c); 143 } 144 } 145 146 void 147 server_status_session_group(struct session *s) 148 { 149 struct session_group *sg; 150 151 if ((sg = session_group_find(s)) == NULL) 152 server_status_session(s); 153 else { 154 TAILQ_FOREACH(s, &sg->sessions, gentry) 155 server_status_session(s); 156 } 157 } 158 159 void 160 server_redraw_window(struct window *w) 161 { 162 struct client *c; 163 u_int i; 164 165 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 166 c = ARRAY_ITEM(&clients, i); 167 if (c == NULL || c->session == NULL) 168 continue; 169 if (c->session->curw->window == w) 170 server_redraw_client(c); 171 } 172 w->flags |= WINDOW_REDRAW; 173 } 174 175 void 176 server_redraw_window_borders(struct window *w) 177 { 178 struct client *c; 179 u_int i; 180 181 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 182 c = ARRAY_ITEM(&clients, i); 183 if (c == NULL || c->session == NULL) 184 continue; 185 if (c->session->curw->window == w) 186 c->flags |= CLIENT_BORDERS; 187 } 188 } 189 190 void 191 server_status_window(struct window *w) 192 { 193 struct session *s; 194 195 /* 196 * This is slightly different. We want to redraw the status line of any 197 * clients containing this window rather than anywhere it is the 198 * current window. 199 */ 200 201 RB_FOREACH(s, sessions, &sessions) { 202 if (session_has(s, w) != NULL) 203 server_status_session(s); 204 } 205 } 206 207 void 208 server_lock(void) 209 { 210 struct client *c; 211 u_int i; 212 213 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 214 c = ARRAY_ITEM(&clients, i); 215 if (c == NULL || c->session == NULL) 216 continue; 217 server_lock_client(c); 218 } 219 } 220 221 void 222 server_lock_session(struct session *s) 223 { 224 struct client *c; 225 u_int i; 226 227 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 228 c = ARRAY_ITEM(&clients, i); 229 if (c == NULL || c->session == NULL || c->session != s) 230 continue; 231 server_lock_client(c); 232 } 233 } 234 235 void 236 server_lock_client(struct client *c) 237 { 238 const char *cmd; 239 size_t cmdlen; 240 struct msg_lock_data lockdata; 241 242 if (c->flags & CLIENT_CONTROL) 243 return; 244 245 if (c->flags & CLIENT_SUSPENDED) 246 return; 247 248 cmd = options_get_string(&c->session->options, "lock-command"); 249 cmdlen = strlcpy(lockdata.cmd, cmd, sizeof lockdata.cmd); 250 if (cmdlen >= sizeof lockdata.cmd) 251 return; 252 253 tty_stop_tty(&c->tty); 254 tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP)); 255 tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR)); 256 tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_E3)); 257 258 c->flags |= CLIENT_SUSPENDED; 259 server_write_client(c, MSG_LOCK, &lockdata, sizeof lockdata); 260 } 261 262 void 263 server_kill_window(struct window *w) 264 { 265 struct session *s, *next_s; 266 struct winlink *wl; 267 268 next_s = RB_MIN(sessions, &sessions); 269 while (next_s != NULL) { 270 s = next_s; 271 next_s = RB_NEXT(sessions, &sessions, s); 272 273 if (session_has(s, w) == NULL) 274 continue; 275 while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) { 276 if (session_detach(s, wl)) { 277 server_destroy_session_group(s); 278 break; 279 } else 280 server_redraw_session_group(s); 281 } 282 283 if (options_get_number(&s->options, "renumber-windows")) 284 session_renumber_windows(s); 285 } 286 } 287 288 int 289 server_link_window(struct session *src, struct winlink *srcwl, 290 struct session *dst, int dstidx, int killflag, int selectflag, char **cause) 291 { 292 struct winlink *dstwl; 293 struct session_group *srcsg, *dstsg; 294 295 srcsg = session_group_find(src); 296 dstsg = session_group_find(dst); 297 if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) { 298 xasprintf(cause, "sessions are grouped"); 299 return (-1); 300 } 301 302 dstwl = NULL; 303 if (dstidx != -1) 304 dstwl = winlink_find_by_index(&dst->windows, dstidx); 305 if (dstwl != NULL) { 306 if (dstwl->window == srcwl->window) { 307 xasprintf(cause, "same index: %d", dstidx); 308 return (-1); 309 } 310 if (killflag) { 311 /* 312 * Can't use session_detach as it will destroy session 313 * if this makes it empty. 314 */ 315 notify_window_unlinked(dst, dstwl->window); 316 dstwl->flags &= ~WINLINK_ALERTFLAGS; 317 winlink_stack_remove(&dst->lastw, dstwl); 318 winlink_remove(&dst->windows, dstwl); 319 320 /* Force select/redraw if current. */ 321 if (dstwl == dst->curw) { 322 selectflag = 1; 323 dst->curw = NULL; 324 } 325 } 326 } 327 328 if (dstidx == -1) 329 dstidx = -1 - options_get_number(&dst->options, "base-index"); 330 dstwl = session_attach(dst, srcwl->window, dstidx, cause); 331 if (dstwl == NULL) 332 return (-1); 333 334 if (selectflag) 335 session_select(dst, dstwl->idx); 336 server_redraw_session_group(dst); 337 338 return (0); 339 } 340 341 void 342 server_unlink_window(struct session *s, struct winlink *wl) 343 { 344 if (session_detach(s, wl)) 345 server_destroy_session_group(s); 346 else 347 server_redraw_session_group(s); 348 } 349 350 void 351 server_destroy_pane(struct window_pane *wp) 352 { 353 struct window *w = wp->window; 354 int old_fd; 355 struct screen_write_ctx ctx; 356 struct grid_cell gc; 357 358 old_fd = wp->fd; 359 if (wp->fd != -1) { 360 bufferevent_free(wp->event); 361 close(wp->fd); 362 wp->fd = -1; 363 } 364 365 if (options_get_number(&w->options, "remain-on-exit")) { 366 if (old_fd == -1) 367 return; 368 screen_write_start(&ctx, wp, &wp->base); 369 screen_write_scrollregion(&ctx, 0, screen_size_y(ctx.s) - 1); 370 screen_write_cursormove(&ctx, 0, screen_size_y(ctx.s) - 1); 371 screen_write_linefeed(&ctx, 1); 372 memcpy(&gc, &grid_default_cell, sizeof gc); 373 gc.attr |= GRID_ATTR_BRIGHT; 374 screen_write_puts(&ctx, &gc, "Pane is dead"); 375 screen_write_stop(&ctx); 376 wp->flags |= PANE_REDRAW; 377 return; 378 } 379 380 server_unzoom_window(w); 381 layout_close_pane(wp); 382 window_remove_pane(w, wp); 383 384 if (TAILQ_EMPTY(&w->panes)) 385 server_kill_window(w); 386 else 387 server_redraw_window(w); 388 } 389 390 void 391 server_destroy_session_group(struct session *s) 392 { 393 struct session_group *sg; 394 395 if ((sg = session_group_find(s)) == NULL) 396 server_destroy_session(s); 397 else { 398 TAILQ_FOREACH(s, &sg->sessions, gentry) 399 server_destroy_session(s); 400 TAILQ_REMOVE(&session_groups, sg, entry); 401 free(sg); 402 } 403 } 404 405 struct session * 406 server_next_session(struct session *s) 407 { 408 struct session *s_loop, *s_out; 409 410 s_out = NULL; 411 RB_FOREACH(s_loop, sessions, &sessions) { 412 if (s_loop == s) 413 continue; 414 if (s_out == NULL || 415 timercmp(&s_loop->activity_time, &s_out->activity_time, <)) 416 s_out = s_loop; 417 } 418 return (s_out); 419 } 420 421 void 422 server_destroy_session(struct session *s) 423 { 424 struct client *c; 425 struct session *s_new; 426 u_int i; 427 428 if (!options_get_number(&s->options, "detach-on-destroy")) 429 s_new = server_next_session(s); 430 else 431 s_new = NULL; 432 433 for (i = 0; i < ARRAY_LENGTH(&clients); i++) { 434 c = ARRAY_ITEM(&clients, i); 435 if (c == NULL || c->session != s) 436 continue; 437 if (s_new == NULL) { 438 c->session = NULL; 439 c->flags |= CLIENT_EXIT; 440 } else { 441 c->last_session = NULL; 442 c->session = s_new; 443 notify_attached_session_changed(c); 444 session_update_activity(s_new); 445 server_redraw_client(c); 446 } 447 } 448 recalculate_sizes(); 449 } 450 451 void 452 server_check_unattached (void) 453 { 454 struct session *s; 455 456 /* 457 * If any sessions are no longer attached and have destroy-unattached 458 * set, collect them. 459 */ 460 RB_FOREACH(s, sessions, &sessions) { 461 if (!(s->flags & SESSION_UNATTACHED)) 462 continue; 463 if (options_get_number (&s->options, "destroy-unattached")) 464 session_destroy(s); 465 } 466 } 467 468 void 469 server_set_identify(struct client *c) 470 { 471 struct timeval tv; 472 int delay; 473 474 delay = options_get_number(&c->session->options, "display-panes-time"); 475 tv.tv_sec = delay / 1000; 476 tv.tv_usec = (delay % 1000) * 1000L; 477 478 if (event_initialized (&c->identify_timer)) 479 evtimer_del(&c->identify_timer); 480 evtimer_set(&c->identify_timer, server_callback_identify, c); 481 evtimer_add(&c->identify_timer, &tv); 482 483 c->flags |= CLIENT_IDENTIFY; 484 c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR); 485 server_redraw_client(c); 486 } 487 488 void 489 server_clear_identify(struct client *c) 490 { 491 if (c->flags & CLIENT_IDENTIFY) { 492 c->flags &= ~CLIENT_IDENTIFY; 493 c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR); 494 server_redraw_client(c); 495 } 496 } 497 498 void 499 server_callback_identify(unused int fd, unused short events, void *data) 500 { 501 struct client *c = data; 502 503 server_clear_identify(c); 504 } 505 506 void 507 server_update_event(struct client *c) 508 { 509 short events; 510 511 events = 0; 512 if (!(c->flags & CLIENT_BAD)) 513 events |= EV_READ; 514 if (c->ibuf.w.queued > 0) 515 events |= EV_WRITE; 516 if (event_initialized(&c->event)) 517 event_del(&c->event); 518 event_set(&c->event, c->ibuf.fd, events, server_client_callback, c); 519 event_add(&c->event, NULL); 520 } 521 522 /* Push stdout to client if possible. */ 523 void 524 server_push_stdout(struct client *c) 525 { 526 struct msg_stdout_data data; 527 size_t size; 528 529 size = EVBUFFER_LENGTH(c->stdout_data); 530 if (size == 0) 531 return; 532 if (size > sizeof data.data) 533 size = sizeof data.data; 534 535 memcpy(data.data, EVBUFFER_DATA(c->stdout_data), size); 536 data.size = size; 537 538 if (server_write_client(c, MSG_STDOUT, &data, sizeof data) == 0) 539 evbuffer_drain(c->stdout_data, size); 540 } 541 542 /* Push stderr to client if possible. */ 543 void 544 server_push_stderr(struct client *c) 545 { 546 struct msg_stderr_data data; 547 size_t size; 548 549 if (c->stderr_data == c->stdout_data) { 550 server_push_stdout(c); 551 return; 552 } 553 size = EVBUFFER_LENGTH(c->stderr_data); 554 if (size == 0) 555 return; 556 if (size > sizeof data.data) 557 size = sizeof data.data; 558 559 memcpy(data.data, EVBUFFER_DATA(c->stderr_data), size); 560 data.size = size; 561 562 if (server_write_client(c, MSG_STDERR, &data, sizeof data) == 0) 563 evbuffer_drain(c->stderr_data, size); 564 } 565 566 /* Set stdin callback. */ 567 int 568 server_set_stdin_callback(struct client *c, void (*cb)(struct client *, int, 569 void *), void *cb_data, char **cause) 570 { 571 if (c == NULL || c->session != NULL) { 572 *cause = xstrdup("no client with stdin"); 573 return (-1); 574 } 575 if (c->flags & CLIENT_TERMINAL) { 576 *cause = xstrdup("stdin is a tty"); 577 return (-1); 578 } 579 if (c->stdin_callback != NULL) { 580 *cause = xstrdup("stdin in use"); 581 return (-1); 582 } 583 584 c->stdin_callback_data = cb_data; 585 c->stdin_callback = cb; 586 587 c->references++; 588 589 if (c->stdin_closed) 590 c->stdin_callback (c, 1, c->stdin_callback_data); 591 592 server_write_client(c, MSG_STDIN, NULL, 0); 593 594 return (0); 595 } 596 597 void 598 server_unzoom_window(struct window *w) 599 { 600 window_unzoom(w); 601 server_redraw_window(w); 602 server_status_window(w); 603 } 604