server-fn.c

   1 /* $OpenBSD$ */
   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 <string.h>
  22 #include <time.h>
  23 #include <unistd.h>
  24
  25 #include "tmux.h"
  26
  27 struct session *server_next_session(struct session *);
  28 void            server_callback_identify(int, short, void *);
  29
  30 void
  31 server_fill_environ(struct session *s, struct environ *env)
  32 {
  33         char             tmuxvar[MAXPATHLEN], *term;
  34         u_int            idx;
  35
  36         if (session_index(s, &idx) != 0)
  37                 fatalx("session not found");
  38         xsnprintf(tmuxvar, sizeof tmuxvar,
  39             "%s,%ld,%u", socket_path, (long) getpid(), idx);
  40         environ_set(env, "TMUX", tmuxvar);
  41
  42         term = options_get_string(&s->options, "default-terminal");
  43         environ_set(env, "TERM", term);
  44 }
  45
  46 void
  47 server_write_client(
  48     struct client *c, enum msgtype type, const void *buf, size_t len)
  49 {
  50         struct imsgbuf  *ibuf = &c->ibuf;
  51
  52         if (c->flags & CLIENT_BAD)
  53                 return;
  54         log_debug("writing %d to client %d", type, c->ibuf.fd);
  55         imsg_compose(ibuf, type, PROTOCOL_VERSION, -1, -1, (void *) buf, len);
  56         server_update_event(c);
  57 }
  58
  59 void
  60 server_write_session(
  61     struct session *s, enum msgtype type, const void *buf, size_t len)
  62 {
  63         struct client   *c;
  64         u_int            i;
  65
  66         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
  67                 c = ARRAY_ITEM(&clients, i);
  68                 if (c == NULL || c->session == NULL)
  69                         continue;
  70                 if (c->session == s)
  71                         server_write_client(c, type, buf, len);
  72         }
  73 }
  74
  75 void
  76 server_redraw_client(struct client *c)
  77 {
  78         c->flags |= CLIENT_REDRAW;
  79 }
  80
  81 void
  82 server_status_client(struct client *c)
  83 {
  84         c->flags |= CLIENT_STATUS;
  85 }
  86
  87 void
  88 server_redraw_session(struct session *s)
  89 {
  90         struct client   *c;
  91         u_int            i;
  92
  93         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
  94                 c = ARRAY_ITEM(&clients, i);
  95                 if (c == NULL || c->session == NULL)
  96                         continue;
  97                 if (c->session == s)
  98                         server_redraw_client(c);
  99         }
 100 }
 101
 102 void
 103 server_redraw_session_group(struct session *s)
 104 {
 105         struct session_group    *sg;
 106
 107         if ((sg = session_group_find(s)) == NULL)
 108                 server_redraw_session(s);
 109         else {
 110                 TAILQ_FOREACH(s, &sg->sessions, gentry)
 111                         server_redraw_session(s);
 112         }
 113 }
 114
 115 void
 116 server_status_session(struct session *s)
 117 {
 118         struct client   *c;
 119         u_int            i;
 120
 121         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 122                 c = ARRAY_ITEM(&clients, i);
 123                 if (c == NULL || c->session == NULL)
 124                         continue;
 125                 if (c->session == s)
 126                         server_status_client(c);
 127         }
 128 }
 129
 130 void
 131 server_status_session_group(struct session *s)
 132 {
 133         struct session_group    *sg;
 134
 135         if ((sg = session_group_find(s)) == NULL)
 136                 server_status_session(s);
 137         else {
 138                 TAILQ_FOREACH(s, &sg->sessions, gentry)
 139                         server_status_session(s);
 140         }
 141 }
 142
 143 void
 144 server_redraw_window(struct window *w)
 145 {
 146         struct client   *c;
 147         u_int            i;
 148
 149         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 150                 c = ARRAY_ITEM(&clients, i);
 151                 if (c == NULL || c->session == NULL)
 152                         continue;
 153                 if (c->session->curw->window == w)
 154                         server_redraw_client(c);
 155         }
 156         w->flags |= WINDOW_REDRAW;
 157 }
 158
 159 void
 160 server_redraw_window_borders(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                         c->flags |= CLIENT_BORDERS;
 171         }
 172 }
 173
 174 void
 175 server_status_window(struct window *w)
 176 {
 177         struct session  *s;
 178         u_int            i;
 179
 180         /*
 181          * This is slightly different. We want to redraw the status line of any
 182          * clients containing this window rather than any where it is the
 183          * current window.
 184          */
 185
 186         for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
 187                 s = ARRAY_ITEM(&sessions, i);
 188                 if (s != NULL && session_has(s, w) != NULL)
 189                         server_status_session(s);
 190         }
 191 }
 192
 193 void
 194 server_lock(void)
 195 {
 196         struct client   *c;
 197         u_int            i;
 198
 199         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 200                 c = ARRAY_ITEM(&clients, i);
 201                 if (c == NULL || c->session == NULL)
 202                         continue;
 203                 server_lock_client(c);
 204         }
 205 }
 206
 207 void
 208 server_lock_session(struct session *s)
 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 || c->session != s)
 216                         continue;
 217                 server_lock_client(c);
 218         }
 219 }
 220
 221 void
 222 server_lock_client(struct client *c)
 223 {
 224         const char              *cmd;
 225         size_t                   cmdlen;
 226         struct msg_lock_data     lockdata;
 227
 228         if (c->flags & CLIENT_SUSPENDED)
 229                 return;
 230
 231         cmd = options_get_string(&c->session->options, "lock-command");
 232         cmdlen = strlcpy(lockdata.cmd, cmd, sizeof lockdata.cmd);
 233         if (cmdlen >= sizeof lockdata.cmd)
 234                 return;
 235
 236         tty_stop_tty(&c->tty);
 237         tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_SMCUP));
 238         tty_raw(&c->tty, tty_term_string(c->tty.term, TTYC_CLEAR));
 239
 240         c->flags |= CLIENT_SUSPENDED;
 241         server_write_client(c, MSG_LOCK, &lockdata, sizeof lockdata);
 242 }
 243
 244 void
 245 server_kill_window(struct window *w)
 246 {
 247         struct session  *s;
 248         struct winlink  *wl;
 249         u_int            i;
 250
 251         for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
 252                 s = ARRAY_ITEM(&sessions, i);
 253                 if (s == NULL || session_has(s, w) == NULL)
 254                         continue;
 255                 while ((wl = winlink_find_by_window(&s->windows, w)) != NULL) {
 256                         if (session_detach(s, wl)) {
 257                                 server_destroy_session_group(s);
 258                                 break;
 259                         } else
 260                                 server_redraw_session_group(s);
 261                 }
 262         }
 263 }
 264
 265 int
 266 server_link_window(struct session *src, struct winlink *srcwl,
 267     struct session *dst, int dstidx, int killflag, int selectflag, char **cause)
 268 {
 269         struct winlink          *dstwl;
 270         struct session_group    *srcsg, *dstsg;
 271
 272         srcsg = session_group_find(src);
 273         dstsg = session_group_find(dst);
 274         if (src != dst && srcsg != NULL && dstsg != NULL && srcsg == dstsg) {
 275                 xasprintf(cause, "sessions are grouped");
 276                 return (-1);
 277         }
 278
 279         dstwl = NULL;
 280         if (dstidx != -1)
 281                 dstwl = winlink_find_by_index(&dst->windows, dstidx);
 282         if (dstwl != NULL) {
 283                 if (dstwl->window == srcwl->window)
 284                         return (-1);
 285                 if (killflag) {
 286                         /*
 287                          * Can't use session_detach as it will destroy session
 288                          * if this makes it empty.
 289                          */
 290                         dstwl->flags &= ~WINLINK_ALERTFLAGS;
 291                         winlink_stack_remove(&dst->lastw, dstwl);
 292                         winlink_remove(&dst->windows, dstwl);
 293
 294                         /* Force select/redraw if current. */
 295                         if (dstwl == dst->curw) {
 296                                 selectflag = 1;
 297                                 dst->curw = NULL;
 298                         }
 299                 }
 300         }
 301
 302         if (dstidx == -1)
 303                 dstidx = -1 - options_get_number(&dst->options, "base-index");
 304         dstwl = session_attach(dst, srcwl->window, dstidx, cause);
 305         if (dstwl == NULL)
 306                 return (-1);
 307
 308         if (selectflag)
 309                 session_select(dst, dstwl->idx);
 310         server_redraw_session_group(dst);
 311
 312         return (0);
 313 }
 314
 315 void
 316 server_unlink_window(struct session *s, struct winlink *wl)
 317 {
 318         if (session_detach(s, wl))
 319                 server_destroy_session_group(s);
 320         else
 321                 server_redraw_session_group(s);
 322 }
 323
 324 void
 325 server_destroy_pane(struct window_pane *wp)
 326 {
 327         struct window   *w = wp->window;
 328
 329         if (wp->fd != -1) {
 330                 close(wp->fd);
 331                 bufferevent_free(wp->event);
 332                 wp->fd = -1;
 333         }
 334
 335         if (options_get_number(&w->options, "remain-on-exit"))
 336                 return;
 337
 338         layout_close_pane(wp);
 339         window_remove_pane(w, wp);
 340
 341         if (TAILQ_EMPTY(&w->panes))
 342                 server_kill_window(w);
 343         else
 344                 server_redraw_window(w);
 345 }
 346
 347 void
 348 server_destroy_session_group(struct session *s)
 349 {
 350         struct session_group    *sg;
 351
 352         if ((sg = session_group_find(s)) == NULL)
 353                 server_destroy_session(s);
 354         else {
 355                 TAILQ_FOREACH(s, &sg->sessions, gentry)
 356                         server_destroy_session(s);
 357                 TAILQ_REMOVE(&session_groups, sg, entry);
 358                 xfree(sg);
 359         }
 360 }
 361
 362 struct session *
 363 server_next_session(struct session *s)
 364 {
 365         struct session *s_loop, *s_out;
 366         u_int           i;
 367
 368         s_out = NULL;
 369         for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
 370                 s_loop = ARRAY_ITEM(&sessions, i);
 371                 if (s_loop == s)
 372                         continue;
 373                 if (s_out == NULL ||
 374                     timercmp(&s_loop->activity_time, &s_out->activity_time, <))
 375                         s_out = s_loop;
 376         }
 377         return (s_out);
 378 }
 379
 380 void
 381 server_destroy_session(struct session *s)
 382 {
 383         struct client   *c;
 384         struct session  *s_new;
 385         u_int            i;
 386
 387         if (!options_get_number(&s->options, "detach-on-destroy"))
 388                 s_new = server_next_session(s);
 389         else
 390                 s_new = NULL;
 391
 392         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 393                 c = ARRAY_ITEM(&clients, i);
 394                 if (c == NULL || c->session != s)
 395                         continue;
 396                 if (s_new == NULL) {
 397                         c->session = NULL;
 398                         c->flags |= CLIENT_EXIT;
 399                 } else {
 400                         c->session = s_new;
 401                         server_redraw_client(c);
 402                 }
 403         }
 404         recalculate_sizes();
 405 }
 406
 407 void
 408 server_set_identify(struct client *c)
 409 {
 410         struct timeval  tv;
 411         int             delay;
 412
 413         delay = options_get_number(&c->session->options, "display-panes-time");
 414         tv.tv_sec = delay / 1000;
 415         tv.tv_usec = (delay % 1000) * 1000L;
 416
 417         evtimer_del(&c->identify_timer);
 418         evtimer_set(&c->identify_timer, server_callback_identify, c);
 419         evtimer_add(&c->identify_timer, &tv);
 420
 421         c->flags |= CLIENT_IDENTIFY;
 422         c->tty.flags |= (TTY_FREEZE|TTY_NOCURSOR);
 423         server_redraw_client(c);
 424 }
 425
 426 void
 427 server_clear_identify(struct client *c)
 428 {
 429         if (c->flags & CLIENT_IDENTIFY) {
 430                 c->flags &= ~CLIENT_IDENTIFY;
 431                 c->tty.flags &= ~(TTY_FREEZE|TTY_NOCURSOR);
 432                 server_redraw_client(c);
 433         }
 434 }
 435
 436 /* ARGSUSED */
 437 void
 438 server_callback_identify(unused int fd, unused short events, void *data)
 439 {
 440         struct client   *c = data;
 441
 442         server_clear_identify(c);
 443 }
 444
 445 void
 446 server_update_event(struct client *c)
 447 {
 448         short   events;
 449
 450         events = 0;
 451         if (!(c->flags & CLIENT_BAD))
 452                 events |= EV_READ;
 453         if (c->ibuf.w.queued > 0)
 454                 events |= EV_WRITE;
 455         event_del(&c->event);
 456         event_set(&c->event, c->ibuf.fd, events, server_client_callback, c);
 457         event_add(&c->event, NULL);
 458 }