Annotation of src/usr.bin/tmux/cmd-queue.c, Revision 1.80
1.80 ! nicm 1: /* $OpenBSD: cmd-queue.c,v 1.79 2020/01/05 12:51:43 nicm Exp $ */
1.1 nicm 2:
3: /*
1.34 nicm 4: * Copyright (c) 2013 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 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 <stdlib.h>
1.23 nicm 23: #include <string.h>
1.7 nicm 24: #include <time.h>
1.1 nicm 25:
26: #include "tmux.h"
27:
1.43 nicm 28: /* Global command queue. */
1.44 nicm 29: static struct cmdq_list global_queue = TAILQ_HEAD_INITIALIZER(global_queue);
1.24 nicm 30:
1.43 nicm 31: /* Get command queue name. */
32: static const char *
33: cmdq_name(struct client *c)
34: {
1.70 nicm 35: static char s[256];
1.43 nicm 36:
37: if (c == NULL)
38: return ("<global>");
1.71 nicm 39: if (c->name != NULL)
40: xsnprintf(s, sizeof s, "<%s>", c->name);
41: else
42: xsnprintf(s, sizeof s, "<%p>", c);
1.43 nicm 43: return (s);
44: }
45:
46: /* Get command queue from client. */
1.44 nicm 47: static struct cmdq_list *
1.43 nicm 48: cmdq_get(struct client *c)
49: {
50: if (c == NULL)
51: return (&global_queue);
52: return (&c->queue);
53: }
54:
55: /* Append an item. */
1.78 nicm 56: struct cmdq_item *
1.44 nicm 57: cmdq_append(struct client *c, struct cmdq_item *item)
1.43 nicm 58: {
1.44 nicm 59: struct cmdq_list *queue = cmdq_get(c);
60: struct cmdq_item *next;
1.43 nicm 61:
62: do {
1.44 nicm 63: next = item->next;
64: item->next = NULL;
1.43 nicm 65:
66: if (c != NULL)
67: c->references++;
1.44 nicm 68: item->client = c;
1.43 nicm 69:
1.44 nicm 70: item->queue = queue;
71: TAILQ_INSERT_TAIL(queue, item, entry);
1.64 nicm 72: log_debug("%s %s: %s", __func__, cmdq_name(c), item->name);
1.43 nicm 73:
1.44 nicm 74: item = next;
75: } while (item != NULL);
1.78 nicm 76: return (TAILQ_LAST(queue, cmdq_list));
1.43 nicm 77: }
78:
79: /* Insert an item. */
1.78 nicm 80: struct cmdq_item *
1.44 nicm 81: cmdq_insert_after(struct cmdq_item *after, struct cmdq_item *item)
1.43 nicm 82: {
83: struct client *c = after->client;
1.44 nicm 84: struct cmdq_list *queue = after->queue;
85: struct cmdq_item *next;
1.43 nicm 86:
87: do {
1.44 nicm 88: next = item->next;
1.64 nicm 89: item->next = after->next;
90: after->next = item;
1.43 nicm 91:
92: if (c != NULL)
93: c->references++;
1.44 nicm 94: item->client = c;
1.43 nicm 95:
1.44 nicm 96: item->queue = queue;
1.64 nicm 97: TAILQ_INSERT_AFTER(queue, after, item, entry);
98: log_debug("%s %s: %s after %s", __func__, cmdq_name(c),
99: item->name, after->name);
1.43 nicm 100:
1.65 nicm 101: after = item;
1.44 nicm 102: item = next;
103: } while (item != NULL);
1.78 nicm 104: return (after);
1.43 nicm 105: }
1.63 nicm 106:
107: /* Insert a hook. */
108: void
109: cmdq_insert_hook(struct session *s, struct cmdq_item *item,
110: struct cmd_find_state *fs, const char *fmt, ...)
111: {
112: struct options *oo;
113: va_list ap;
114: char *name;
115: struct cmdq_item *new_item;
116: struct options_entry *o;
117: struct options_array_item *a;
118: struct cmd_list *cmdlist;
119:
120: if (item->flags & CMDQ_NOHOOKS)
121: return;
122: if (s == NULL)
123: oo = global_s_options;
124: else
125: oo = s->options;
126:
127: va_start(ap, fmt);
128: xvasprintf(&name, fmt, ap);
129: va_end(ap);
130:
131: o = options_get(oo, name);
132: if (o == NULL) {
133: free(name);
134: return;
135: }
136: log_debug("running hook %s (parent %p)", name, item);
137:
138: a = options_array_first(o);
139: while (a != NULL) {
140: cmdlist = options_array_item_value(a)->cmdlist;
141: if (cmdlist == NULL) {
142: a = options_array_next(a);
143: continue;
144: }
145:
146: new_item = cmdq_get_command(cmdlist, fs, NULL, CMDQ_NOHOOKS);
147: cmdq_format(new_item, "hook", "%s", name);
1.78 nicm 148: if (item != NULL)
149: item = cmdq_insert_after(item, new_item);
150: else
151: item = cmdq_append(NULL, new_item);
1.63 nicm 152:
153: a = options_array_next(a);
154: }
155:
156: free(name);
1.74 nicm 157: }
158:
159: /* Continue processing command queue. */
160: void
161: cmdq_continue(struct cmdq_item *item)
162: {
163: item->flags &= ~CMDQ_WAITING;
1.63 nicm 164: }
165:
1.43 nicm 166: /* Remove an item. */
167: static void
1.44 nicm 168: cmdq_remove(struct cmdq_item *item)
1.43 nicm 169: {
1.49 nicm 170: if (item->shared != NULL && --item->shared->references == 0) {
171: if (item->shared->formats != NULL)
172: format_free(item->shared->formats);
173: free(item->shared);
174: }
1.43 nicm 175:
1.44 nicm 176: if (item->client != NULL)
177: server_client_unref(item->client);
1.43 nicm 178:
1.62 nicm 179: if (item->cmdlist != NULL)
1.44 nicm 180: cmd_list_free(item->cmdlist);
1.43 nicm 181:
1.44 nicm 182: TAILQ_REMOVE(item->queue, item, entry);
1.46 nicm 183:
1.64 nicm 184: free(item->name);
1.44 nicm 185: free(item);
1.43 nicm 186: }
187:
188: /* Remove all subsequent items that match this item's group. */
189: static void
1.44 nicm 190: cmdq_remove_group(struct cmdq_item *item)
1.43 nicm 191: {
1.44 nicm 192: struct cmdq_item *this, *next;
1.43 nicm 193:
1.69 nicm 194: if (item->group == 0)
195: return;
1.44 nicm 196: this = TAILQ_NEXT(item, entry);
1.43 nicm 197: while (this != NULL) {
198: next = TAILQ_NEXT(this, entry);
1.44 nicm 199: if (this->group == item->group)
1.43 nicm 200: cmdq_remove(this);
201: this = next;
202: }
203: }
204:
205: /* Get a command for the command queue. */
1.44 nicm 206: struct cmdq_item *
1.43 nicm 207: cmdq_get_command(struct cmd_list *cmdlist, struct cmd_find_state *current,
208: struct mouse_event *m, int flags)
209: {
1.44 nicm 210: struct cmdq_item *item, *first = NULL, *last = NULL;
211: struct cmd *cmd;
1.73 nicm 212: struct cmdq_shared *shared = NULL;
1.72 nicm 213: u_int group = 0;
1.49 nicm 214:
1.72 nicm 215: TAILQ_FOREACH(cmd, &cmdlist->list, qentry) {
216: if (cmd->group != group) {
217: shared = xcalloc(1, sizeof *shared);
218: if (current != NULL)
219: cmd_find_copy_state(&shared->current, current);
220: else
221: cmd_find_clear_state(&shared->current, 0);
222: if (m != NULL)
223: memcpy(&shared->mouse, m, sizeof shared->mouse);
224: group = cmd->group;
225: }
1.43 nicm 226:
1.44 nicm 227: item = xcalloc(1, sizeof *item);
1.64 nicm 228: xasprintf(&item->name, "[%s/%p]", cmd->entry->name, item);
1.44 nicm 229: item->type = CMDQ_COMMAND;
1.46 nicm 230:
1.68 nicm 231: item->group = cmd->group;
1.44 nicm 232: item->flags = flags;
1.43 nicm 233:
1.49 nicm 234: item->shared = shared;
1.44 nicm 235: item->cmdlist = cmdlist;
236: item->cmd = cmd;
1.68 nicm 237:
238: log_debug("%s: %s group %u", __func__, item->name, item->group);
1.43 nicm 239:
1.49 nicm 240: shared->references++;
1.43 nicm 241: cmdlist->references++;
242:
243: if (first == NULL)
1.44 nicm 244: first = item;
1.43 nicm 245: if (last != NULL)
1.44 nicm 246: last->next = item;
247: last = item;
1.43 nicm 248: }
249: return (first);
250: }
251:
1.54 nicm 252: /* Fill in flag for a command. */
253: static enum cmd_retval
254: cmdq_find_flag(struct cmdq_item *item, struct cmd_find_state *fs,
255: const struct cmd_entry_flag *flag)
256: {
257: const char *value;
258:
259: if (flag->flag == 0) {
260: cmd_find_clear_state(fs, 0);
261: return (CMD_RETURN_NORMAL);
262: }
263:
264: value = args_get(item->cmd->args, flag->flag);
265: if (cmd_find_target(fs, item, value, flag->type, flag->flags) != 0) {
266: cmd_find_clear_state(fs, 0);
267: return (CMD_RETURN_ERROR);
268: }
269: return (CMD_RETURN_NORMAL);
270: }
271:
1.43 nicm 272: /* Fire command on command queue. */
273: static enum cmd_retval
1.44 nicm 274: cmdq_fire_command(struct cmdq_item *item)
1.43 nicm 275: {
1.44 nicm 276: struct client *c = item->client;
1.72 nicm 277: const char *name = cmdq_name(c);
1.66 nicm 278: struct cmdq_shared *shared = item->shared;
1.44 nicm 279: struct cmd *cmd = item->cmd;
1.54 nicm 280: const struct cmd_entry *entry = cmd->entry;
1.43 nicm 281: enum cmd_retval retval;
282: struct cmd_find_state *fsp, fs;
283: int flags;
1.72 nicm 284: char *tmp;
285:
286: if (log_get_level() > 1) {
287: tmp = cmd_print(cmd);
288: log_debug("%s %s: (%u) %s", __func__, name, item->group, tmp);
289: free(tmp);
290: }
1.43 nicm 291:
1.66 nicm 292: flags = !!(shared->flags & CMDQ_SHARED_CONTROL);
1.44 nicm 293: cmdq_guard(item, "begin", flags);
1.43 nicm 294:
1.53 nicm 295: if (item->client == NULL)
296: item->client = cmd_find_client(item, NULL, 1);
1.54 nicm 297: retval = cmdq_find_flag(item, &item->source, &entry->source);
298: if (retval == CMD_RETURN_ERROR)
299: goto out;
300: retval = cmdq_find_flag(item, &item->target, &entry->target);
301: if (retval == CMD_RETURN_ERROR)
1.43 nicm 302: goto out;
303:
1.54 nicm 304: retval = entry->exec(cmd, item);
1.43 nicm 305: if (retval == CMD_RETURN_ERROR)
306: goto out;
307:
1.54 nicm 308: if (entry->flags & CMD_AFTERHOOK) {
309: if (cmd_find_valid_state(&item->target))
310: fsp = &item->target;
1.51 nicm 311: else if (cmd_find_valid_state(&item->shared->current))
312: fsp = &item->shared->current;
1.58 nicm 313: else if (cmd_find_from_client(&fs, item->client, 0) == 0)
1.43 nicm 314: fsp = &fs;
1.51 nicm 315: else
316: goto out;
1.63 nicm 317: cmdq_insert_hook(fsp->s, item, fsp, "after-%s", entry->name);
1.43 nicm 318: }
319:
320: out:
1.44 nicm 321: item->client = c;
1.43 nicm 322: if (retval == CMD_RETURN_ERROR)
1.44 nicm 323: cmdq_guard(item, "error", flags);
1.43 nicm 324: else
1.44 nicm 325: cmdq_guard(item, "end", flags);
1.43 nicm 326: return (retval);
327: }
328:
329: /* Get a callback for the command queue. */
1.44 nicm 330: struct cmdq_item *
1.46 nicm 331: cmdq_get_callback1(const char *name, cmdq_cb cb, void *data)
1.1 nicm 332: {
1.44 nicm 333: struct cmdq_item *item;
1.1 nicm 334:
1.44 nicm 335: item = xcalloc(1, sizeof *item);
1.64 nicm 336: xasprintf(&item->name, "[%s/%p]", name, item);
1.44 nicm 337: item->type = CMDQ_CALLBACK;
1.46 nicm 338:
1.44 nicm 339: item->group = 0;
340: item->flags = 0;
1.1 nicm 341:
1.44 nicm 342: item->cb = cb;
343: item->data = data;
1.1 nicm 344:
1.44 nicm 345: return (item);
1.67 nicm 346: }
347:
348: /* Generic error callback. */
349: static enum cmd_retval
350: cmdq_error_callback(struct cmdq_item *item, void *data)
351: {
352: char *error = data;
353:
354: cmdq_error(item, "%s", error);
355: free(error);
356:
357: return (CMD_RETURN_NORMAL);
358: }
359:
360: /* Get an error callback for the command queue. */
361: struct cmdq_item *
362: cmdq_get_error(const char *error)
363: {
364: return (cmdq_get_callback(cmdq_error_callback, xstrdup(error)));
1.43 nicm 365: }
1.1 nicm 366:
1.43 nicm 367: /* Fire callback on callback queue. */
368: static enum cmd_retval
1.44 nicm 369: cmdq_fire_callback(struct cmdq_item *item)
1.43 nicm 370: {
1.44 nicm 371: return (item->cb(item, item->data));
1.43 nicm 372: }
1.45 nicm 373:
374: /* Add a format to command queue. */
375: void
376: cmdq_format(struct cmdq_item *item, const char *key, const char *fmt, ...)
377: {
1.49 nicm 378: struct cmdq_shared *shared = item->shared;
1.45 nicm 379: va_list ap;
380: char *value;
381:
382: va_start(ap, fmt);
383: xvasprintf(&value, fmt, ap);
384: va_end(ap);
385:
1.49 nicm 386: if (shared->formats == NULL)
1.55 nicm 387: shared->formats = format_create(NULL, NULL, FORMAT_NONE, 0);
1.49 nicm 388: format_add(shared->formats, key, "%s", value);
1.45 nicm 389:
390: free(value);
391: }
1.33 nicm 392:
1.43 nicm 393: /* Process next item on command queue. */
394: u_int
395: cmdq_next(struct client *c)
396: {
1.44 nicm 397: struct cmdq_list *queue = cmdq_get(c);
1.43 nicm 398: const char *name = cmdq_name(c);
1.44 nicm 399: struct cmdq_item *item;
1.43 nicm 400: enum cmd_retval retval;
401: u_int items = 0;
402: static u_int number;
1.1 nicm 403:
1.43 nicm 404: if (TAILQ_EMPTY(queue)) {
405: log_debug("%s %s: empty", __func__, name);
1.25 nicm 406: return (0);
407: }
1.44 nicm 408: if (TAILQ_FIRST(queue)->flags & CMDQ_WAITING) {
1.43 nicm 409: log_debug("%s %s: waiting", __func__, name);
410: return (0);
411: }
412:
413: log_debug("%s %s: enter", __func__, name);
414: for (;;) {
1.44 nicm 415: item = TAILQ_FIRST(queue);
416: if (item == NULL)
1.43 nicm 417: break;
1.46 nicm 418: log_debug("%s %s: %s (%d), flags %x", __func__, name,
419: item->name, item->type, item->flags);
1.43 nicm 420:
421: /*
422: * Any item with the waiting flag set waits until an external
423: * event clears the flag (for example, a job - look at
424: * run-shell).
425: */
1.44 nicm 426: if (item->flags & CMDQ_WAITING)
1.43 nicm 427: goto waiting;
428:
429: /*
430: * Items are only fired once, once the fired flag is set, a
431: * waiting flag can only be cleared by an external event.
432: */
1.44 nicm 433: if (~item->flags & CMDQ_FIRED) {
434: item->time = time(NULL);
435: item->number = ++number;
1.43 nicm 436:
1.50 nicm 437: switch (item->type) {
1.44 nicm 438: case CMDQ_COMMAND:
439: retval = cmdq_fire_command(item);
1.43 nicm 440:
441: /*
442: * If a command returns an error, remove any
443: * subsequent commands in the same group.
444: */
445: if (retval == CMD_RETURN_ERROR)
1.44 nicm 446: cmdq_remove_group(item);
1.43 nicm 447: break;
1.44 nicm 448: case CMDQ_CALLBACK:
449: retval = cmdq_fire_callback(item);
1.43 nicm 450: break;
451: default:
452: retval = CMD_RETURN_ERROR;
453: break;
454: }
1.44 nicm 455: item->flags |= CMDQ_FIRED;
1.43 nicm 456:
457: if (retval == CMD_RETURN_WAIT) {
1.44 nicm 458: item->flags |= CMDQ_WAITING;
1.43 nicm 459: goto waiting;
460: }
461: items++;
462: }
1.44 nicm 463: cmdq_remove(item);
1.43 nicm 464: }
465:
466: log_debug("%s %s: exit (empty)", __func__, name);
467: return (items);
1.1 nicm 468:
1.43 nicm 469: waiting:
470: log_debug("%s %s: exit (wait)", __func__, name);
471: return (items);
472: }
473:
474: /* Print a guard line. */
475: void
1.44 nicm 476: cmdq_guard(struct cmdq_item *item, const char *guard, int flags)
1.43 nicm 477: {
1.44 nicm 478: struct client *c = item->client;
1.76 nicm 479: long t = item->time;
480: u_int number = item->number;
1.43 nicm 481:
1.76 nicm 482: if (c != NULL && (c->flags & CLIENT_CONTROL))
483: file_print(c, "%%%s %ld %u %d\n", guard, t, number, flags);
1.1 nicm 484: }
485:
486: /* Show message from command. */
1.18 nicm 487: void
1.44 nicm 488: cmdq_print(struct cmdq_item *item, const char *fmt, ...)
1.1 nicm 489: {
1.61 nicm 490: struct client *c = item->client;
491: struct window_pane *wp;
492: struct window_mode_entry *wme;
493: va_list ap;
494: char *tmp, *msg;
1.1 nicm 495:
496: va_start(ap, fmt);
1.76 nicm 497: xvasprintf(&msg, fmt, ap);
498: va_end(ap);
499:
500: log_debug("%s: %s", __func__, msg);
1.1 nicm 501:
502: if (c == NULL)
503: /* nothing */;
504: else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
1.28 nicm 505: if (~c->flags & CLIENT_UTF8) {
1.76 nicm 506: tmp = msg;
1.28 nicm 507: msg = utf8_sanitize(tmp);
508: free(tmp);
1.76 nicm 509: }
510: file_print(c, "%s\n", msg);
1.1 nicm 511: } else {
1.60 nicm 512: wp = c->session->curw->window->active;
1.61 nicm 513: wme = TAILQ_FIRST(&wp->modes);
514: if (wme == NULL || wme->mode != &window_view_mode)
1.60 nicm 515: window_pane_set_mode(wp, &window_view_mode, NULL, NULL);
1.77 nicm 516: window_copy_add(wp, "%s", msg);
1.1 nicm 517: }
518:
1.76 nicm 519: free(msg);
1.1 nicm 520: }
521:
522: /* Show error from command. */
1.18 nicm 523: void
1.44 nicm 524: cmdq_error(struct cmdq_item *item, const char *fmt, ...)
1.1 nicm 525: {
1.44 nicm 526: struct client *c = item->client;
527: struct cmd *cmd = item->cmd;
1.1 nicm 528: va_list ap;
1.20 nicm 529: char *msg;
1.28 nicm 530: char *tmp;
1.1 nicm 531:
532: va_start(ap, fmt);
1.76 nicm 533: xvasprintf(&msg, fmt, ap);
1.1 nicm 534: va_end(ap);
1.57 nicm 535:
536: log_debug("%s: %s", __func__, msg);
1.1 nicm 537:
1.20 nicm 538: if (c == NULL)
539: cfg_add_cause("%s:%u: %s", cmd->file, cmd->line, msg);
540: else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
1.28 nicm 541: if (~c->flags & CLIENT_UTF8) {
542: tmp = msg;
543: msg = utf8_sanitize(tmp);
544: free(tmp);
545: }
1.79 nicm 546: if (c->flags & CLIENT_CONTROL)
547: file_print(c, "%s\n", msg);
548: else
549: file_error(c, "%s\n", msg);
1.13 nicm 550: c->retval = 1;
1.1 nicm 551: } else {
552: *msg = toupper((u_char) *msg);
553: status_message_set(c, "%s", msg);
554: }
555:
556: free(msg);
557: }
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