1: /* $OpenBSD$ */
2:
3: /*
4: * Copyright (c) 2007 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: #include <sys/ioctl.h>
21:
22: #include <errno.h>
23: #include <fcntl.h>
24: #include <fnmatch.h>
25: #include <signal.h>
26: #include <stdint.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <termios.h>
30: #include <time.h>
31: #include <unistd.h>
32:
33: #include "tmux.h"
34:
35: /*
36: * Each window is attached to a number of panes, each of which is a pty. This
37: * file contains code to handle them.
38: *
39: * A pane has two buffers attached, these are filled and emptied by the main
40: * server poll loop. Output data is received from pty's in screen format,
41: * translated and returned as a series of escape sequences and strings via
42: * input_parse (in input.c). Input data is received as key codes and written
43: * directly via input_key.
44: *
45: * Each pane also has a "virtual" screen (screen.c) which contains the current
46: * state and is redisplayed when the window is reattached to a client.
47: *
48: * Windows are stored directly on a global array and wrapped in any number of
49: * winlink structs to be linked onto local session RB trees. A reference count
50: * is maintained and a window removed from the global list and destroyed when
51: * it reaches zero.
52: */
53:
54: /* Global window list. */
55: struct windows windows;
56:
57: /* Global panes tree. */
58: struct window_pane_tree all_window_panes;
59: static u_int next_window_pane_id;
60: static u_int next_window_id;
61: static u_int next_active_point;
62:
63: static void window_destroy(struct window *);
64:
65: static struct window_pane *window_pane_create(struct window *, u_int, u_int,
66: u_int);
67: static void window_pane_destroy(struct window_pane *);
68:
69: static void window_pane_read_callback(struct bufferevent *, void *);
70: static void window_pane_error_callback(struct bufferevent *, short, void *);
71:
72: static int winlink_next_index(struct winlinks *, int);
73:
74: static struct window_pane *window_pane_choose_best(struct window_pane **,
75: u_int);
76:
77: RB_GENERATE(windows, window, entry, window_cmp);
78: RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
79: RB_GENERATE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
80:
81: int
82: window_cmp(struct window *w1, struct window *w2)
83: {
84: return (w1->id - w2->id);
85: }
86:
87: int
88: winlink_cmp(struct winlink *wl1, struct winlink *wl2)
89: {
90: return (wl1->idx - wl2->idx);
91: }
92:
93: int
94: window_pane_cmp(struct window_pane *wp1, struct window_pane *wp2)
95: {
96: return (wp1->id - wp2->id);
97: }
98:
99: struct winlink *
100: winlink_find_by_window(struct winlinks *wwl, struct window *w)
101: {
102: struct winlink *wl;
103:
104: RB_FOREACH(wl, winlinks, wwl) {
105: if (wl->window == w)
106: return (wl);
107: }
108:
109: return (NULL);
110: }
111:
112: struct winlink *
113: winlink_find_by_index(struct winlinks *wwl, int idx)
114: {
115: struct winlink wl;
116:
117: if (idx < 0)
118: fatalx("bad index");
119:
120: wl.idx = idx;
121: return (RB_FIND(winlinks, wwl, &wl));
122: }
123:
124: struct winlink *
125: winlink_find_by_window_id(struct winlinks *wwl, u_int id)
126: {
127: struct winlink *wl;
128:
129: RB_FOREACH(wl, winlinks, wwl) {
130: if (wl->window->id == id)
131: return (wl);
132: }
133: return (NULL);
134: }
135:
136: static int
137: winlink_next_index(struct winlinks *wwl, int idx)
138: {
139: int i;
140:
141: i = idx;
142: do {
143: if (winlink_find_by_index(wwl, i) == NULL)
144: return (i);
145: if (i == INT_MAX)
146: i = 0;
147: else
148: i++;
149: } while (i != idx);
150: return (-1);
151: }
152:
153: u_int
154: winlink_count(struct winlinks *wwl)
155: {
156: struct winlink *wl;
157: u_int n;
158:
159: n = 0;
160: RB_FOREACH(wl, winlinks, wwl)
161: n++;
162:
163: return (n);
164: }
165:
166: struct winlink *
167: winlink_add(struct winlinks *wwl, int idx)
168: {
169: struct winlink *wl;
170:
171: if (idx < 0) {
172: if ((idx = winlink_next_index(wwl, -idx - 1)) == -1)
173: return (NULL);
174: } else if (winlink_find_by_index(wwl, idx) != NULL)
175: return (NULL);
176:
177: wl = xcalloc(1, sizeof *wl);
178: wl->idx = idx;
179: RB_INSERT(winlinks, wwl, wl);
180:
181: return (wl);
182: }
183:
184: void
185: winlink_set_window(struct winlink *wl, struct window *w)
186: {
187: if (wl->window != NULL) {
188: TAILQ_REMOVE(&wl->window->winlinks, wl, wentry);
189: window_remove_ref(w);
190: }
191: TAILQ_INSERT_TAIL(&w->winlinks, wl, wentry);
192: wl->window = w;
193: w->references++;
194: }
195:
196: void
197: winlink_remove(struct winlinks *wwl, struct winlink *wl)
198: {
199: struct window *w = wl->window;
200:
201: if (w != NULL) {
202: TAILQ_REMOVE(&w->winlinks, wl, wentry);
203: window_remove_ref(w);
204: }
205:
206: RB_REMOVE(winlinks, wwl, wl);
207: free(wl->status_text);
208: free(wl);
209: }
210:
211: struct winlink *
212: winlink_next(struct winlink *wl)
213: {
214: return (RB_NEXT(winlinks, wwl, wl));
215: }
216:
217: struct winlink *
218: winlink_previous(struct winlink *wl)
219: {
220: return (RB_PREV(winlinks, wwl, wl));
221: }
222:
223: struct winlink *
224: winlink_next_by_number(struct winlink *wl, struct session *s, int n)
225: {
226: for (; n > 0; n--) {
227: if ((wl = RB_NEXT(winlinks, wwl, wl)) == NULL)
228: wl = RB_MIN(winlinks, &s->windows);
229: }
230:
231: return (wl);
232: }
233:
234: struct winlink *
235: winlink_previous_by_number(struct winlink *wl, struct session *s, int n)
236: {
237: for (; n > 0; n--) {
238: if ((wl = RB_PREV(winlinks, wwl, wl)) == NULL)
239: wl = RB_MAX(winlinks, &s->windows);
240: }
241:
242: return (wl);
243: }
244:
245: void
246: winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
247: {
248: if (wl == NULL)
249: return;
250:
251: winlink_stack_remove(stack, wl);
252: TAILQ_INSERT_HEAD(stack, wl, sentry);
253: }
254:
255: void
256: winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
257: {
258: struct winlink *wl2;
259:
260: if (wl == NULL)
261: return;
262:
263: TAILQ_FOREACH(wl2, stack, sentry) {
264: if (wl2 == wl) {
265: TAILQ_REMOVE(stack, wl, sentry);
266: return;
267: }
268: }
269: }
270:
271: struct window *
272: window_find_by_id_str(const char *s)
273: {
274: const char *errstr;
275: u_int id;
276:
277: if (*s != '@')
278: return (NULL);
279:
280: id = strtonum(s + 1, 0, UINT_MAX, &errstr);
281: if (errstr != NULL)
282: return (NULL);
283: return (window_find_by_id(id));
284: }
285:
286: struct window *
287: window_find_by_id(u_int id)
288: {
289: struct window w;
290:
291: w.id = id;
292: return (RB_FIND(windows, &windows, &w));
293: }
294:
295: void
296: window_update_activity(struct window *w)
297: {
298: gettimeofday(&w->activity_time, NULL);
299: alerts_queue(w, WINDOW_ACTIVITY);
300: }
301:
302: struct window *
303: window_create(u_int sx, u_int sy)
304: {
305: struct window *w;
306:
307: w = xcalloc(1, sizeof *w);
308: w->name = NULL;
309: w->flags = WINDOW_STYLECHANGED;
310:
311: TAILQ_INIT(&w->panes);
312: w->active = NULL;
313:
314: w->lastlayout = -1;
315: w->layout_root = NULL;
316:
317: w->sx = sx;
318: w->sy = sy;
319:
320: w->options = options_create(global_w_options);
321:
322: w->references = 0;
323: TAILQ_INIT(&w->winlinks);
324:
325: w->id = next_window_id++;
326: RB_INSERT(windows, &windows, w);
327:
328: window_update_activity(w);
329:
330: return (w);
331: }
332:
333: struct window *
334: window_create_spawn(const char *name, int argc, char **argv, const char *path,
335: const char *shell, const char *cwd, struct environ *env,
336: struct termios *tio, u_int sx, u_int sy, u_int hlimit, char **cause)
337: {
338: struct window *w;
339: struct window_pane *wp;
340:
341: w = window_create(sx, sy);
342: wp = window_add_pane(w, NULL, 0, hlimit);
343: layout_init(w, wp);
344:
345: if (window_pane_spawn(wp, argc, argv, path, shell, cwd,
346: env, tio, cause) != 0) {
347: window_destroy(w);
348: return (NULL);
349: }
350:
351: w->active = TAILQ_FIRST(&w->panes);
352: if (name != NULL) {
353: w->name = xstrdup(name);
354: options_set_number(w->options, "automatic-rename", 0);
355: } else
356: w->name = default_window_name(w);
357:
358: return (w);
359: }
360:
361: static void
362: window_destroy(struct window *w)
363: {
364: if (!TAILQ_EMPTY(&w->winlinks))
365: fatalx("window destroyed with winlinks");
366:
367: RB_REMOVE(windows, &windows, w);
368:
369: if (w->layout_root != NULL)
370: layout_free_cell(w->layout_root);
371: if (w->saved_layout_root != NULL)
372: layout_free_cell(w->saved_layout_root);
373: free(w->old_layout);
374:
375: if (event_initialized(&w->name_event))
376: evtimer_del(&w->name_event);
377:
378: if (event_initialized(&w->alerts_timer))
379: evtimer_del(&w->alerts_timer);
380:
381: options_free(w->options);
382:
383: window_destroy_panes(w);
384:
385: free(w->name);
386: free(w);
387: }
388:
389: void
390: window_remove_ref(struct window *w)
391: {
392: if (w->references == 0)
393: fatal("bad reference count");
394: w->references--;
395: if (w->references == 0)
396: window_destroy(w);
397: }
398:
399: void
400: window_set_name(struct window *w, const char *new_name)
401: {
402: free(w->name);
403: w->name = xstrdup(new_name);
404: notify_window("window-renamed", w);
405: }
406:
407: void
408: window_resize(struct window *w, u_int sx, u_int sy)
409: {
410: w->sx = sx;
411: w->sy = sy;
412: }
413:
414: int
415: window_has_pane(struct window *w, struct window_pane *wp)
416: {
417: struct window_pane *wp1;
418:
419: TAILQ_FOREACH(wp1, &w->panes, entry) {
420: if (wp1 == wp)
421: return (1);
422: }
423: return (0);
424: }
425:
426: int
427: window_set_active_pane(struct window *w, struct window_pane *wp)
428: {
429: log_debug("%s: pane %%%u (was %%%u)", __func__, wp->id, w->active->id);
430: if (wp == w->active)
431: return (0);
432: w->last = w->active;
433: w->active = wp;
434: while (!window_pane_visible(w->active)) {
435: w->active = TAILQ_PREV(w->active, window_panes, entry);
436: if (w->active == NULL)
437: w->active = TAILQ_LAST(&w->panes, window_panes);
438: if (w->active == wp)
439: return (1);
440: }
441: w->active->active_point = next_active_point++;
442: w->active->flags |= PANE_CHANGED;
443: return (1);
444: }
445:
446: void
447: window_redraw_active_switch(struct window *w, struct window_pane *wp)
448: {
449: const struct grid_cell *gc;
450:
451: if (wp == w->active)
452: return;
453:
454: /*
455: * If window-style and window-active-style are the same, we don't need
456: * to redraw panes when switching active panes.
457: */
458: gc = options_get_style(w->options, "window-active-style");
459: if (style_equal(gc, options_get_style(w->options, "window-style")))
460: return;
461:
462: /*
463: * If the now active or inactive pane do not have a custom style or if
464: * the palette is different, they need to be redrawn.
465: */
466: if (window_pane_get_palette(w->active, w->active->colgc.fg) != -1 ||
467: window_pane_get_palette(w->active, w->active->colgc.bg) != -1 ||
468: style_equal(&grid_default_cell, &w->active->colgc))
469: w->active->flags |= PANE_REDRAW;
470: if (window_pane_get_palette(wp, wp->colgc.fg) != -1 ||
471: window_pane_get_palette(wp, wp->colgc.bg) != -1 ||
472: style_equal(&grid_default_cell, &wp->colgc))
473: wp->flags |= PANE_REDRAW;
474: }
475:
476: struct window_pane *
477: window_get_active_at(struct window *w, u_int x, u_int y)
478: {
479: struct window_pane *wp;
480:
481: TAILQ_FOREACH(wp, &w->panes, entry) {
482: if (!window_pane_visible(wp))
483: continue;
484: if (x < wp->xoff || x > wp->xoff + wp->sx)
485: continue;
486: if (y < wp->yoff || y > wp->yoff + wp->sy)
487: continue;
488: return (wp);
489: }
490: return (NULL);
491: }
492:
493: struct window_pane *
494: window_find_string(struct window *w, const char *s)
495: {
496: u_int x, y;
497:
498: x = w->sx / 2;
499: y = w->sy / 2;
500:
501: if (strcasecmp(s, "top") == 0)
502: y = 0;
503: else if (strcasecmp(s, "bottom") == 0)
504: y = w->sy - 1;
505: else if (strcasecmp(s, "left") == 0)
506: x = 0;
507: else if (strcasecmp(s, "right") == 0)
508: x = w->sx - 1;
509: else if (strcasecmp(s, "top-left") == 0) {
510: x = 0;
511: y = 0;
512: } else if (strcasecmp(s, "top-right") == 0) {
513: x = w->sx - 1;
514: y = 0;
515: } else if (strcasecmp(s, "bottom-left") == 0) {
516: x = 0;
517: y = w->sy - 1;
518: } else if (strcasecmp(s, "bottom-right") == 0) {
519: x = w->sx - 1;
520: y = w->sy - 1;
521: } else
522: return (NULL);
523:
524: return (window_get_active_at(w, x, y));
525: }
526:
527: int
528: window_zoom(struct window_pane *wp)
529: {
530: struct window *w = wp->window;
531: struct window_pane *wp1;
532:
533: if (w->flags & WINDOW_ZOOMED)
534: return (-1);
535:
536: if (!window_pane_visible(wp))
537: return (-1);
538:
539: if (window_count_panes(w) == 1)
540: return (-1);
541:
542: if (w->active != wp)
543: window_set_active_pane(w, wp);
544:
545: TAILQ_FOREACH(wp1, &w->panes, entry) {
546: wp1->saved_layout_cell = wp1->layout_cell;
547: wp1->layout_cell = NULL;
548: }
549:
550: w->saved_layout_root = w->layout_root;
551: layout_init(w, wp);
552: w->flags |= WINDOW_ZOOMED;
553: notify_window("window-layout-changed", w);
554:
555: return (0);
556: }
557:
558: int
559: window_unzoom(struct window *w)
560: {
561: struct window_pane *wp;
562:
563: if (!(w->flags & WINDOW_ZOOMED))
564: return (-1);
565:
566: w->flags &= ~WINDOW_ZOOMED;
567: layout_free(w);
568: w->layout_root = w->saved_layout_root;
569: w->saved_layout_root = NULL;
570:
571: TAILQ_FOREACH(wp, &w->panes, entry) {
572: wp->layout_cell = wp->saved_layout_cell;
573: wp->saved_layout_cell = NULL;
574: }
575: layout_fix_panes(w, w->sx, w->sy);
576: notify_window("window-layout-changed", w);
577:
578: return (0);
579: }
580:
581: struct window_pane *
582: window_add_pane(struct window *w, struct window_pane *other, int before,
583: u_int hlimit)
584: {
585: struct window_pane *wp;
586:
587: if (other == NULL)
588: other = w->active;
589:
590: wp = window_pane_create(w, w->sx, w->sy, hlimit);
591: if (TAILQ_EMPTY(&w->panes)) {
592: log_debug("%s: @%u at start", __func__, w->id);
593: TAILQ_INSERT_HEAD(&w->panes, wp, entry);
594: } else if (before) {
595: log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
596: TAILQ_INSERT_BEFORE(other, wp, entry);
597: } else {
598: log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
599: TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
600: }
601: return (wp);
602: }
603:
604: void
605: window_lost_pane(struct window *w, struct window_pane *wp)
606: {
607: if (wp == marked_pane.wp)
608: server_clear_marked();
609:
610: if (wp == w->active) {
611: w->active = w->last;
612: w->last = NULL;
613: if (w->active == NULL) {
614: w->active = TAILQ_PREV(wp, window_panes, entry);
615: if (w->active == NULL)
616: w->active = TAILQ_NEXT(wp, entry);
617: }
618: if (w->active != NULL)
619: w->active->flags |= PANE_CHANGED;
620: } else if (wp == w->last)
621: w->last = NULL;
622: }
623:
624: void
625: window_remove_pane(struct window *w, struct window_pane *wp)
626: {
627: window_lost_pane(w, wp);
628:
629: TAILQ_REMOVE(&w->panes, wp, entry);
630: window_pane_destroy(wp);
631: }
632:
633: struct window_pane *
634: window_pane_at_index(struct window *w, u_int idx)
635: {
636: struct window_pane *wp;
637: u_int n;
638:
639: n = options_get_number(w->options, "pane-base-index");
640: TAILQ_FOREACH(wp, &w->panes, entry) {
641: if (n == idx)
642: return (wp);
643: n++;
644: }
645: return (NULL);
646: }
647:
648: struct window_pane *
649: window_pane_next_by_number(struct window *w, struct window_pane *wp, u_int n)
650: {
651: for (; n > 0; n--) {
652: if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
653: wp = TAILQ_FIRST(&w->panes);
654: }
655:
656: return (wp);
657: }
658:
659: struct window_pane *
660: window_pane_previous_by_number(struct window *w, struct window_pane *wp,
661: u_int n)
662: {
663: for (; n > 0; n--) {
664: if ((wp = TAILQ_PREV(wp, window_panes, entry)) == NULL)
665: wp = TAILQ_LAST(&w->panes, window_panes);
666: }
667:
668: return (wp);
669: }
670:
671: int
672: window_pane_index(struct window_pane *wp, u_int *i)
673: {
674: struct window_pane *wq;
675: struct window *w = wp->window;
676:
677: *i = options_get_number(w->options, "pane-base-index");
678: TAILQ_FOREACH(wq, &w->panes, entry) {
679: if (wp == wq) {
680: return (0);
681: }
682: (*i)++;
683: }
684:
685: return (-1);
686: }
687:
688: u_int
689: window_count_panes(struct window *w)
690: {
691: struct window_pane *wp;
692: u_int n;
693:
694: n = 0;
695: TAILQ_FOREACH(wp, &w->panes, entry)
696: n++;
697: return (n);
698: }
699:
700: void
701: window_destroy_panes(struct window *w)
702: {
703: struct window_pane *wp;
704:
705: while (!TAILQ_EMPTY(&w->panes)) {
706: wp = TAILQ_FIRST(&w->panes);
707: TAILQ_REMOVE(&w->panes, wp, entry);
708: window_pane_destroy(wp);
709: }
710: }
711:
712: /* Retuns the printable flags on a window, empty string if no flags set. */
713: char *
714: window_printable_flags(struct session *s, struct winlink *wl)
715: {
716: char flags[32];
717: int pos;
718:
719: pos = 0;
720: if (wl->flags & WINLINK_ACTIVITY)
721: flags[pos++] = '#';
722: if (wl->flags & WINLINK_BELL)
723: flags[pos++] = '!';
724: if (wl->flags & WINLINK_SILENCE)
725: flags[pos++] = '~';
726: if (wl == s->curw)
727: flags[pos++] = '*';
728: if (wl == TAILQ_FIRST(&s->lastw))
729: flags[pos++] = '-';
730: if (server_check_marked() && wl == marked_pane.wl)
731: flags[pos++] = 'M';
732: if (wl->window->flags & WINDOW_ZOOMED)
733: flags[pos++] = 'Z';
734: flags[pos] = '\0';
735: return (xstrdup(flags));
736: }
737:
738: struct window_pane *
739: window_pane_find_by_id_str(const char *s)
740: {
741: const char *errstr;
742: u_int id;
743:
744: if (*s != '%')
745: return (NULL);
746:
747: id = strtonum(s + 1, 0, UINT_MAX, &errstr);
748: if (errstr != NULL)
749: return (NULL);
750: return (window_pane_find_by_id(id));
751: }
752:
753: struct window_pane *
754: window_pane_find_by_id(u_int id)
755: {
756: struct window_pane wp;
757:
758: wp.id = id;
759: return (RB_FIND(window_pane_tree, &all_window_panes, &wp));
760: }
761:
762: static struct window_pane *
763: window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
764: {
765: struct window_pane *wp;
766: char host[HOST_NAME_MAX + 1];
767:
768: wp = xcalloc(1, sizeof *wp);
769: wp->window = w;
770:
771: wp->id = next_window_pane_id++;
772: RB_INSERT(window_pane_tree, &all_window_panes, wp);
773:
774: wp->argc = 0;
775: wp->argv = NULL;
776: wp->shell = NULL;
777: wp->cwd = NULL;
778:
779: wp->fd = -1;
780: wp->event = NULL;
781:
782: wp->mode = NULL;
783: wp->modeprefix = 1;
784:
785: wp->layout_cell = NULL;
786:
787: wp->xoff = 0;
788: wp->yoff = 0;
789:
790: wp->sx = sx;
791: wp->sy = sy;
792:
793: wp->pipe_fd = -1;
794: wp->pipe_off = 0;
795: wp->pipe_event = NULL;
796:
797: wp->saved_grid = NULL;
798:
799: memcpy(&wp->colgc, &grid_default_cell, sizeof wp->colgc);
800:
801: screen_init(&wp->base, sx, sy, hlimit);
802: wp->screen = &wp->base;
803:
804: screen_init(&wp->status_screen, 1, 1, 0);
805:
806: if (gethostname(host, sizeof host) == 0)
807: screen_set_title(&wp->base, host);
808:
809: input_init(wp);
810:
811: return (wp);
812: }
813:
814: static void
815: window_pane_destroy(struct window_pane *wp)
816: {
817: window_pane_reset_mode(wp);
818:
819: if (wp->fd != -1) {
820: #ifdef HAVE_UTEMPTER
821: utempter_remove_record(wp->fd);
822: #endif
823: bufferevent_free(wp->event);
824: close(wp->fd);
825: }
826:
827: input_free(wp);
828:
829: screen_free(&wp->base);
830: if (wp->saved_grid != NULL)
831: grid_destroy(wp->saved_grid);
832:
833: if (wp->pipe_fd != -1) {
834: bufferevent_free(wp->pipe_event);
835: close(wp->pipe_fd);
836: }
837:
838: if (event_initialized(&wp->resize_timer))
839: event_del(&wp->resize_timer);
840:
841: RB_REMOVE(window_pane_tree, &all_window_panes, wp);
842:
843: free((void *)wp->cwd);
844: free(wp->shell);
845: cmd_free_argv(wp->argc, wp->argv);
846: free(wp->palette);
847: free(wp);
848: }
849:
850: int
851: window_pane_spawn(struct window_pane *wp, int argc, char **argv,
852: const char *path, const char *shell, const char *cwd, struct environ *env,
853: struct termios *tio, char **cause)
854: {
855: struct winsize ws;
856: char *argv0, *cmd, **argvp;
857: const char *ptr, *first, *home;
858: struct termios tio2;
859: #ifdef HAVE_UTEMPTER
860: char s[32];
861: #endif
862: int i;
863:
864: if (wp->fd != -1) {
865: bufferevent_free(wp->event);
866: close(wp->fd);
867: }
868: if (argc > 0) {
869: cmd_free_argv(wp->argc, wp->argv);
870: wp->argc = argc;
871: wp->argv = cmd_copy_argv(argc, argv);
872: }
873: if (shell != NULL) {
874: free(wp->shell);
875: wp->shell = xstrdup(shell);
876: }
877: if (cwd != NULL) {
878: free((void *)wp->cwd);
879: wp->cwd = xstrdup(cwd);
880: }
881:
882: cmd = cmd_stringify_argv(wp->argc, wp->argv);
883: log_debug("spawn: %s -- %s", wp->shell, cmd);
884: for (i = 0; i < wp->argc; i++)
885: log_debug("spawn: argv[%d] = %s", i, wp->argv[i]);
886: environ_log(env, "spawn: ");
887:
888: memset(&ws, 0, sizeof ws);
889: ws.ws_col = screen_size_x(&wp->base);
890: ws.ws_row = screen_size_y(&wp->base);
891:
892: wp->pid = pty_fork(ptm_fd, &wp->fd, wp->tty, sizeof wp->tty, &ws);
893: switch (wp->pid) {
894: case -1:
895: wp->fd = -1;
896: xasprintf(cause, "%s: %s", cmd, strerror(errno));
897: free(cmd);
898: return (-1);
899: case 0:
900: if (chdir(wp->cwd) != 0) {
901: if ((home = find_home()) == NULL || chdir(home) != 0)
902: chdir("/");
903: }
904:
905: if (tcgetattr(STDIN_FILENO, &tio2) != 0)
906: fatal("tcgetattr failed");
907: if (tio != NULL)
908: memcpy(tio2.c_cc, tio->c_cc, sizeof tio2.c_cc);
909: tio2.c_cc[VERASE] = '\177';
910: #ifdef IUTF8
911: tio2.c_iflag |= IUTF8;
912: #endif
913: if (tcsetattr(STDIN_FILENO, TCSANOW, &tio2) != 0)
914: fatal("tcgetattr failed");
915:
916: closefrom(STDERR_FILENO + 1);
917:
918: if (path != NULL)
919: environ_set(env, "PATH", "%s", path);
920: environ_set(env, "TMUX_PANE", "%%%u", wp->id);
921: environ_push(env);
922:
923: clear_signals(1);
924: log_close();
925:
926: setenv("SHELL", wp->shell, 1);
927: ptr = strrchr(wp->shell, '/');
928:
929: /*
930: * If given one argument, assume it should be passed to sh -c;
931: * with more than one argument, use execvp(). If there is no
932: * arguments, create a login shell.
933: */
934: if (wp->argc > 0) {
935: if (wp->argc != 1) {
936: /* Copy to ensure argv ends in NULL. */
937: argvp = cmd_copy_argv(wp->argc, wp->argv);
938: execvp(argvp[0], argvp);
939: fatal("execvp failed");
940: }
941: first = wp->argv[0];
942:
943: if (ptr != NULL && *(ptr + 1) != '\0')
944: xasprintf(&argv0, "%s", ptr + 1);
945: else
946: xasprintf(&argv0, "%s", wp->shell);
947: execl(wp->shell, argv0, "-c", first, (char *)NULL);
948: fatal("execl failed");
949: }
950: if (ptr != NULL && *(ptr + 1) != '\0')
951: xasprintf(&argv0, "-%s", ptr + 1);
952: else
953: xasprintf(&argv0, "-%s", wp->shell);
954: execl(wp->shell, argv0, (char *)NULL);
955: fatal("execl failed");
956: }
957:
958: #ifdef HAVE_UTEMPTER
959: xsnprintf(s, sizeof s, "tmux(%lu).%%%u", (long) getpid(), wp->id);
960: utempter_add_record(wp->fd, s);
961: kill(getpid(), SIGCHLD);
962: #endif
963:
964: setblocking(wp->fd, 0);
965:
966: wp->event = bufferevent_new(wp->fd, window_pane_read_callback, NULL,
967: window_pane_error_callback, wp);
968:
969: bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
970: bufferevent_enable(wp->event, EV_READ|EV_WRITE);
971:
972: free(cmd);
973: return (0);
974: }
975:
976: static void
977: window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
978: {
979: struct window_pane *wp = data;
980: struct evbuffer *evb = wp->event->input;
981: size_t size = EVBUFFER_LENGTH(evb);
982: char *new_data;
983: size_t new_size;
984:
985: new_size = size - wp->pipe_off;
986: if (wp->pipe_fd != -1 && new_size > 0) {
987: new_data = EVBUFFER_DATA(evb) + wp->pipe_off;
988: bufferevent_write(wp->pipe_event, new_data, new_size);
989: }
990:
991: log_debug("%%%u has %zu bytes", wp->id, size);
992: input_parse(wp);
993:
994: wp->pipe_off = EVBUFFER_LENGTH(evb);
995: }
996:
997: static void
998: window_pane_error_callback(__unused struct bufferevent *bufev,
999: __unused short what, void *data)
1000: {
1001: struct window_pane *wp = data;
1002:
1003: server_destroy_pane(wp, 1);
1004: }
1005:
1006: void
1007: window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
1008: {
1009: if (sx == wp->sx && sy == wp->sy)
1010: return;
1011: wp->sx = sx;
1012: wp->sy = sy;
1013:
1014: screen_resize(&wp->base, sx, sy, wp->saved_grid == NULL);
1015: if (wp->mode != NULL)
1016: wp->mode->resize(wp, sx, sy);
1017:
1018: wp->flags |= PANE_RESIZE;
1019: }
1020:
1021: /*
1022: * Enter alternative screen mode. A copy of the visible screen is saved and the
1023: * history is not updated
1024: */
1025: void
1026: window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc,
1027: int cursor)
1028: {
1029: struct screen *s = &wp->base;
1030: u_int sx, sy;
1031:
1032: if (wp->saved_grid != NULL)
1033: return;
1034: if (!options_get_number(wp->window->options, "alternate-screen"))
1035: return;
1036: sx = screen_size_x(s);
1037: sy = screen_size_y(s);
1038:
1039: wp->saved_grid = grid_create(sx, sy, 0);
1040: grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
1041: if (cursor) {
1042: wp->saved_cx = s->cx;
1043: wp->saved_cy = s->cy;
1044: }
1045: memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
1046:
1047: grid_view_clear(s->grid, 0, 0, sx, sy, 8);
1048:
1049: wp->base.grid->flags &= ~GRID_HISTORY;
1050:
1051: wp->flags |= PANE_REDRAW;
1052: }
1053:
1054: /* Exit alternate screen mode and restore the copied grid. */
1055: void
1056: window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc,
1057: int cursor)
1058: {
1059: struct screen *s = &wp->base;
1060: u_int sx, sy;
1061:
1062: if (wp->saved_grid == NULL)
1063: return;
1064: if (!options_get_number(wp->window->options, "alternate-screen"))
1065: return;
1066: sx = screen_size_x(s);
1067: sy = screen_size_y(s);
1068:
1069: /*
1070: * If the current size is bigger, temporarily resize to the old size
1071: * before copying back.
1072: */
1073: if (sy > wp->saved_grid->sy)
1074: screen_resize(s, sx, wp->saved_grid->sy, 1);
1075:
1076: /* Restore the grid, cursor position and cell. */
1077: grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
1078: if (cursor)
1079: s->cx = wp->saved_cx;
1080: if (s->cx > screen_size_x(s) - 1)
1081: s->cx = screen_size_x(s) - 1;
1082: if (cursor)
1083: s->cy = wp->saved_cy;
1084: if (s->cy > screen_size_y(s) - 1)
1085: s->cy = screen_size_y(s) - 1;
1086: memcpy(gc, &wp->saved_cell, sizeof *gc);
1087:
1088: /*
1089: * Turn history back on (so resize can use it) and then resize back to
1090: * the current size.
1091: */
1092: wp->base.grid->flags |= GRID_HISTORY;
1093: if (sy > wp->saved_grid->sy || sx != wp->saved_grid->sx)
1094: screen_resize(s, sx, sy, 1);
1095:
1096: grid_destroy(wp->saved_grid);
1097: wp->saved_grid = NULL;
1098:
1099: wp->flags |= PANE_REDRAW;
1100: }
1101:
1102: void
1103: window_pane_set_palette(struct window_pane *wp, u_int n, int colour)
1104: {
1105: if (n > 0xff)
1106: return;
1107:
1108: if (wp->palette == NULL)
1109: wp->palette = xcalloc(0x100, sizeof *wp->palette);
1110:
1111: wp->palette[n] = colour;
1112: wp->flags |= PANE_REDRAW;
1113: }
1114:
1115: void
1116: window_pane_unset_palette(struct window_pane *wp, u_int n)
1117: {
1118: if (n > 0xff || wp->palette == NULL)
1119: return;
1120:
1121: wp->palette[n] = 0;
1122: wp->flags |= PANE_REDRAW;
1123: }
1124:
1125: void
1126: window_pane_reset_palette(struct window_pane *wp)
1127: {
1128: if (wp->palette == NULL)
1129: return;
1130:
1131: free(wp->palette);
1132: wp->palette = NULL;
1133: wp->flags |= PANE_REDRAW;
1134: }
1135:
1136: int
1137: window_pane_get_palette(const struct window_pane *wp, int c)
1138: {
1139: int new;
1140:
1141: if (wp == NULL || wp->palette == NULL)
1142: return (-1);
1143:
1144: new = -1;
1145: if (c < 8)
1146: new = wp->palette[c];
1147: else if (c >= 90 && c <= 97)
1148: new = wp->palette[8 + c - 90];
1149: else if (c & COLOUR_FLAG_256)
1150: new = wp->palette[c & ~COLOUR_FLAG_256];
1151: if (new == 0)
1152: return (-1);
1153: return (new);
1154: }
1155:
1156: static void
1157: window_pane_mode_timer(__unused int fd, __unused short events, void *arg)
1158: {
1159: struct window_pane *wp = arg;
1160: struct timeval tv = { .tv_sec = 10 };
1161: int n = 0;
1162:
1163: evtimer_del(&wp->modetimer);
1164: evtimer_add(&wp->modetimer, &tv);
1165:
1166: log_debug("%%%u in mode: last=%ld", wp->id, (long)wp->modelast);
1167:
1168: if (wp->modelast < time(NULL) - WINDOW_MODE_TIMEOUT) {
1169: if (ioctl(wp->fd, FIONREAD, &n) == -1 || n > 0)
1170: window_pane_reset_mode(wp);
1171: }
1172: }
1173:
1174: int
1175: window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode)
1176: {
1177: struct screen *s;
1178: struct timeval tv = { .tv_sec = 10 };
1179:
1180: if (wp->mode != NULL)
1181: return (1);
1182: wp->mode = mode;
1183:
1184: wp->modelast = time(NULL);
1185: evtimer_set(&wp->modetimer, window_pane_mode_timer, wp);
1186: evtimer_add(&wp->modetimer, &tv);
1187:
1188: if ((s = wp->mode->init(wp)) != NULL)
1189: wp->screen = s;
1190: wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1191:
1192: server_status_window(wp->window);
1193: return (0);
1194: }
1195:
1196: void
1197: window_pane_reset_mode(struct window_pane *wp)
1198: {
1199: if (wp->mode == NULL)
1200: return;
1201:
1202: evtimer_del(&wp->modetimer);
1203:
1204: wp->mode->free(wp);
1205: wp->mode = NULL;
1206: wp->modeprefix = 1;
1207:
1208: wp->screen = &wp->base;
1209: wp->flags |= (PANE_REDRAW|PANE_CHANGED);
1210:
1211: server_status_window(wp->window);
1212: }
1213:
1214: void
1215: window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
1216: key_code key, struct mouse_event *m)
1217: {
1218: struct window_pane *wp2;
1219:
1220: if (KEYC_IS_MOUSE(key) && m == NULL)
1221: return;
1222:
1223: if (wp->mode != NULL) {
1224: wp->modelast = time(NULL);
1225: if (wp->mode->key != NULL)
1226: wp->mode->key(wp, c, s, key, m);
1227: return;
1228: }
1229:
1230: if (wp->fd == -1 || wp->flags & PANE_INPUTOFF)
1231: return;
1232:
1233: input_key(wp, key, m);
1234:
1235: if (KEYC_IS_MOUSE(key))
1236: return;
1237: if (options_get_number(wp->window->options, "synchronize-panes")) {
1238: TAILQ_FOREACH(wp2, &wp->window->panes, entry) {
1239: if (wp2 == wp || wp2->mode != NULL)
1240: continue;
1241: if (wp2->fd == -1 || wp2->flags & PANE_INPUTOFF)
1242: continue;
1243: if (window_pane_visible(wp2))
1244: input_key(wp2, key, NULL);
1245: }
1246: }
1247: }
1248:
1249: int
1250: window_pane_outside(struct window_pane *wp)
1251: {
1252: struct window *w = wp->window;
1253:
1254: if (wp->xoff >= w->sx || wp->yoff >= w->sy)
1255: return (1);
1256: if (wp->xoff + wp->sx > w->sx || wp->yoff + wp->sy > w->sy)
1257: return (1);
1258: return (0);
1259: }
1260:
1261: int
1262: window_pane_visible(struct window_pane *wp)
1263: {
1264: if (wp->layout_cell == NULL)
1265: return (0);
1266: return (!window_pane_outside(wp));
1267: }
1268:
1269: char *
1270: window_pane_search(struct window_pane *wp, const char *searchstr,
1271: u_int *lineno)
1272: {
1273: struct screen *s = &wp->base;
1274: char *newsearchstr, *line, *msg;
1275: u_int i;
1276:
1277: msg = NULL;
1278: xasprintf(&newsearchstr, "*%s*", searchstr);
1279:
1280: for (i = 0; i < screen_size_y(s); i++) {
1281: line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
1282: if (fnmatch(newsearchstr, line, 0) == 0) {
1283: msg = line;
1284: if (lineno != NULL)
1285: *lineno = i;
1286: break;
1287: }
1288: free(line);
1289: }
1290:
1291: free(newsearchstr);
1292: return (msg);
1293: }
1294:
1295: /* Get MRU pane from a list. */
1296: static struct window_pane *
1297: window_pane_choose_best(struct window_pane **list, u_int size)
1298: {
1299: struct window_pane *next, *best;
1300: u_int i;
1301:
1302: if (size == 0)
1303: return (NULL);
1304:
1305: best = list[0];
1306: for (i = 1; i < size; i++) {
1307: next = list[i];
1308: if (next->active_point > best->active_point)
1309: best = next;
1310: }
1311: return (best);
1312: }
1313:
1314: /*
1315: * Find the pane directly above another. We build a list of those adjacent to
1316: * top edge and then choose the best.
1317: */
1318: struct window_pane *
1319: window_pane_find_up(struct window_pane *wp)
1320: {
1321: struct window_pane *next, *best, **list;
1322: u_int edge, left, right, end, size;
1323: int status, found;
1324:
1325: if (wp == NULL || !window_pane_visible(wp))
1326: return (NULL);
1327: status = options_get_number(wp->window->options, "pane-border-status");
1328:
1329: list = NULL;
1330: size = 0;
1331:
1332: edge = wp->yoff;
1333: if (edge == (status == 1 ? 1 : 0))
1334: edge = wp->window->sy + 1 - (status == 2 ? 1 : 0);
1335:
1336: left = wp->xoff;
1337: right = wp->xoff + wp->sx;
1338:
1339: TAILQ_FOREACH(next, &wp->window->panes, entry) {
1340: if (next == wp || !window_pane_visible(next))
1341: continue;
1342: if (next->yoff + next->sy + 1 != edge)
1343: continue;
1344: end = next->xoff + next->sx - 1;
1345:
1346: found = 0;
1347: if (next->xoff < left && end > right)
1348: found = 1;
1349: else if (next->xoff >= left && next->xoff <= right)
1350: found = 1;
1351: else if (end >= left && end <= right)
1352: found = 1;
1353: if (!found)
1354: continue;
1355: list = xreallocarray(list, size + 1, sizeof *list);
1356: list[size++] = next;
1357: }
1358:
1359: best = window_pane_choose_best(list, size);
1360: free(list);
1361: return (best);
1362: }
1363:
1364: /* Find the pane directly below another. */
1365: struct window_pane *
1366: window_pane_find_down(struct window_pane *wp)
1367: {
1368: struct window_pane *next, *best, **list;
1369: u_int edge, left, right, end, size;
1370: int status, found;
1371:
1372: if (wp == NULL || !window_pane_visible(wp))
1373: return (NULL);
1374: status = options_get_number(wp->window->options, "pane-border-status");
1375:
1376: list = NULL;
1377: size = 0;
1378:
1379: edge = wp->yoff + wp->sy + 1;
1380: if (edge >= wp->window->sy - (status == 2 ? 1 : 0))
1381: edge = (status == 1 ? 1 : 0);
1382:
1383: left = wp->xoff;
1384: right = wp->xoff + wp->sx;
1385:
1386: TAILQ_FOREACH(next, &wp->window->panes, entry) {
1387: if (next == wp || !window_pane_visible(next))
1388: continue;
1389: if (next->yoff != edge)
1390: continue;
1391: end = next->xoff + next->sx - 1;
1392:
1393: found = 0;
1394: if (next->xoff < left && end > right)
1395: found = 1;
1396: else if (next->xoff >= left && next->xoff <= right)
1397: found = 1;
1398: else if (end >= left && end <= right)
1399: found = 1;
1400: if (!found)
1401: continue;
1402: list = xreallocarray(list, size + 1, sizeof *list);
1403: list[size++] = next;
1404: }
1405:
1406: best = window_pane_choose_best(list, size);
1407: free(list);
1408: return (best);
1409: }
1410:
1411: /* Find the pane directly to the left of another. */
1412: struct window_pane *
1413: window_pane_find_left(struct window_pane *wp)
1414: {
1415: struct window_pane *next, *best, **list;
1416: u_int edge, top, bottom, end, size;
1417: int found;
1418:
1419: if (wp == NULL || !window_pane_visible(wp))
1420: return (NULL);
1421:
1422: list = NULL;
1423: size = 0;
1424:
1425: edge = wp->xoff;
1426: if (edge == 0)
1427: edge = wp->window->sx + 1;
1428:
1429: top = wp->yoff;
1430: bottom = wp->yoff + wp->sy;
1431:
1432: TAILQ_FOREACH(next, &wp->window->panes, entry) {
1433: if (next == wp || !window_pane_visible(next))
1434: continue;
1435: if (next->xoff + next->sx + 1 != edge)
1436: continue;
1437: end = next->yoff + next->sy - 1;
1438:
1439: found = 0;
1440: if (next->yoff < top && end > bottom)
1441: found = 1;
1442: else if (next->yoff >= top && next->yoff <= bottom)
1443: found = 1;
1444: else if (end >= top && end <= bottom)
1445: found = 1;
1446: if (!found)
1447: continue;
1448: list = xreallocarray(list, size + 1, sizeof *list);
1449: list[size++] = next;
1450: }
1451:
1452: best = window_pane_choose_best(list, size);
1453: free(list);
1454: return (best);
1455: }
1456:
1457: /* Find the pane directly to the right of another. */
1458: struct window_pane *
1459: window_pane_find_right(struct window_pane *wp)
1460: {
1461: struct window_pane *next, *best, **list;
1462: u_int edge, top, bottom, end, size;
1463: int found;
1464:
1465: if (wp == NULL || !window_pane_visible(wp))
1466: return (NULL);
1467:
1468: list = NULL;
1469: size = 0;
1470:
1471: edge = wp->xoff + wp->sx + 1;
1472: if (edge >= wp->window->sx)
1473: edge = 0;
1474:
1475: top = wp->yoff;
1476: bottom = wp->yoff + wp->sy;
1477:
1478: TAILQ_FOREACH(next, &wp->window->panes, entry) {
1479: if (next == wp || !window_pane_visible(next))
1480: continue;
1481: if (next->xoff != edge)
1482: continue;
1483: end = next->yoff + next->sy - 1;
1484:
1485: found = 0;
1486: if (next->yoff < top && end > bottom)
1487: found = 1;
1488: else if (next->yoff >= top && next->yoff <= bottom)
1489: found = 1;
1490: else if (end >= top && end <= bottom)
1491: found = 1;
1492: if (!found)
1493: continue;
1494: list = xreallocarray(list, size + 1, sizeof *list);
1495: list[size++] = next;
1496: }
1497:
1498: best = window_pane_choose_best(list, size);
1499: free(list);
1500: return (best);
1501: }
1502:
1503: /* Clear alert flags for a winlink */
1504: void
1505: winlink_clear_flags(struct winlink *wl)
1506: {
1507: struct winlink *loop;
1508:
1509: wl->window->flags &= ~WINDOW_ALERTFLAGS;
1510: TAILQ_FOREACH(loop, &wl->window->winlinks, wentry) {
1511: if ((loop->flags & WINLINK_ALERTFLAGS) != 0) {
1512: loop->flags &= ~WINLINK_ALERTFLAGS;
1513: server_status_session(loop->session);
1514: }
1515: }
1516: }
1517:
1518: /* Shuffle window indexes up. */
1519: int
1520: winlink_shuffle_up(struct session *s, struct winlink *wl)
1521: {
1522: int idx, last;
1523:
1524: idx = wl->idx + 1;
1525:
1526: /* Find the next free index. */
1527: for (last = idx; last < INT_MAX; last++) {
1528: if (winlink_find_by_index(&s->windows, last) == NULL)
1529: break;
1530: }
1531: if (last == INT_MAX)
1532: return (-1);
1533:
1534: /* Move everything from last - 1 to idx up a bit. */
1535: for (; last > idx; last--) {
1536: wl = winlink_find_by_index(&s->windows, last - 1);
1537: server_link_window(s, wl, s, last, 0, 0, NULL);
1538: server_unlink_window(s, wl);
1539: }
1540:
1541: return (idx);
1542: }
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