Annotation of src/usr.bin/tmux/cmd-queue.c, Revision 1.26
1.26 ! nicm 1: /* $OpenBSD: cmd-queue.c,v 1.25 2015/09/16 22:24:54 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2013 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 <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:
1.24 nicm 28: enum cmd_retval cmdq_continue_one(struct cmd_q *);
29:
1.1 nicm 30: /* Create new command queue. */
31: struct cmd_q *
32: cmdq_new(struct client *c)
33: {
34: struct cmd_q *cmdq;
35:
36: cmdq = xcalloc(1, sizeof *cmdq);
37: cmdq->references = 1;
1.25 nicm 38: cmdq->flags = 0;
1.1 nicm 39:
40: cmdq->client = c;
1.11 nicm 41: cmdq->client_exit = -1;
1.1 nicm 42:
43: TAILQ_INIT(&cmdq->queue);
44: cmdq->item = NULL;
45: cmdq->cmd = NULL;
46:
47: return (cmdq);
48: }
49:
50: /* Free command queue */
51: int
52: cmdq_free(struct cmd_q *cmdq)
53: {
1.25 nicm 54: if (--cmdq->references != 0) {
55: if (cmdq->flags & CMD_Q_DEAD)
56: return (1);
57: return (0);
58: }
1.1 nicm 59:
60: cmdq_flush(cmdq);
61: free(cmdq);
62: return (1);
63: }
64:
65: /* Show message from command. */
1.18 nicm 66: void
1.1 nicm 67: cmdq_print(struct cmd_q *cmdq, const char *fmt, ...)
68: {
69: struct client *c = cmdq->client;
70: struct window *w;
71: va_list ap;
72:
73: va_start(ap, fmt);
74:
75: if (c == NULL)
76: /* nothing */;
77: else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
78: evbuffer_add_vprintf(c->stdout_data, fmt, ap);
79:
80: evbuffer_add(c->stdout_data, "\n", 1);
81: server_push_stdout(c);
82: } else {
83: w = c->session->curw->window;
84: if (w->active->mode != &window_copy_mode) {
85: window_pane_reset_mode(w->active);
86: window_pane_set_mode(w->active, &window_copy_mode);
87: window_copy_init_for_output(w->active);
88: }
89: window_copy_vadd(w->active, fmt, ap);
90: }
91:
92: va_end(ap);
93: }
94:
95: /* Show error from command. */
1.18 nicm 96: void
1.1 nicm 97: cmdq_error(struct cmd_q *cmdq, const char *fmt, ...)
98: {
99: struct client *c = cmdq->client;
100: struct cmd *cmd = cmdq->cmd;
101: va_list ap;
1.20 nicm 102: char *msg;
1.1 nicm 103: size_t msglen;
104:
105: va_start(ap, fmt);
106: msglen = xvasprintf(&msg, fmt, ap);
107: va_end(ap);
108:
1.20 nicm 109: if (c == NULL)
110: cfg_add_cause("%s:%u: %s", cmd->file, cmd->line, msg);
111: else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
1.1 nicm 112: evbuffer_add(c->stderr_data, msg, msglen);
113: evbuffer_add(c->stderr_data, "\n", 1);
114:
115: server_push_stderr(c);
1.13 nicm 116: c->retval = 1;
1.1 nicm 117: } else {
118: *msg = toupper((u_char) *msg);
119: status_message_set(c, "%s", msg);
120: }
121:
122: free(msg);
123: }
124:
1.4 nicm 125: /* Print a guard line. */
1.21 nicm 126: void
1.10 nicm 127: cmdq_guard(struct cmd_q *cmdq, const char *guard, int flags)
1.4 nicm 128: {
129: struct client *c = cmdq->client;
130:
1.21 nicm 131: if (c == NULL || !(c->flags & CLIENT_CONTROL))
132: return;
1.4 nicm 133:
1.9 nicm 134: evbuffer_add_printf(c->stdout_data, "%%%s %ld %u %d\n", guard,
135: (long) cmdq->time, cmdq->number, flags);
1.4 nicm 136: server_push_stdout(c);
137: }
138:
1.1 nicm 139: /* Add command list to queue and begin processing if needed. */
140: void
1.23 nicm 141: cmdq_run(struct cmd_q *cmdq, struct cmd_list *cmdlist, struct mouse_event *m)
1.1 nicm 142: {
1.23 nicm 143: cmdq_append(cmdq, cmdlist, m);
1.1 nicm 144:
145: if (cmdq->item == NULL) {
146: cmdq->cmd = NULL;
147: cmdq_continue(cmdq);
148: }
149: }
150:
151: /* Add command list to queue. */
152: void
1.23 nicm 153: cmdq_append(struct cmd_q *cmdq, struct cmd_list *cmdlist, struct mouse_event *m)
1.1 nicm 154: {
155: struct cmd_q_item *item;
156:
157: item = xcalloc(1, sizeof *item);
158: item->cmdlist = cmdlist;
159: TAILQ_INSERT_TAIL(&cmdq->queue, item, qentry);
160: cmdlist->references++;
1.23 nicm 161:
162: if (m != NULL)
163: memcpy(&item->mouse, m, sizeof item->mouse);
164: else
165: item->mouse.valid = 0;
1.1 nicm 166: }
167:
1.24 nicm 168: /* Process one command. */
169: enum cmd_retval
170: cmdq_continue_one(struct cmd_q *cmdq)
171: {
172: struct cmd *cmd = cmdq->cmd;
173: enum cmd_retval retval;
174: char tmp[1024];
175: int flags = !!(cmd->flags & CMD_CONTROL);
176:
177: cmd_print(cmd, tmp, sizeof tmp);
178: log_debug("cmdq %p: %s", cmdq, tmp);
179:
180: cmdq->time = time(NULL);
181: cmdq->number++;
182:
183: cmdq_guard(cmdq, "begin", flags);
184:
185: retval = cmd->entry->exec(cmd, cmdq);
186:
187: if (retval == CMD_RETURN_ERROR)
188: cmdq_guard(cmdq, "error", flags);
189: else
190: cmdq_guard(cmdq, "end", flags);
191: return (retval);
192: }
193:
1.1 nicm 194: /* Continue processing command queue. Returns 1 if finishes empty. */
195: int
196: cmdq_continue(struct cmd_q *cmdq)
197: {
1.26 ! nicm 198: struct client *c = cmdq->client;
1.1 nicm 199: struct cmd_q_item *next;
200: enum cmd_retval retval;
1.24 nicm 201: int empty;
1.1 nicm 202:
1.22 nicm 203: cmdq->references++;
1.1 nicm 204: notify_disable();
1.26 ! nicm 205:
! 206: log_debug("continuing cmdq %p: flags=%#x, client=%d", cmdq, cmdq->flags,
! 207: c != NULL ? c->ibuf.fd : -1);
1.1 nicm 208:
209: empty = TAILQ_EMPTY(&cmdq->queue);
210: if (empty)
211: goto empty;
212:
213: if (cmdq->item == NULL) {
214: cmdq->item = TAILQ_FIRST(&cmdq->queue);
215: cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
216: } else
217: cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
218:
219: do {
220: while (cmdq->cmd != NULL) {
1.24 nicm 221: retval = cmdq_continue_one(cmdq);
1.1 nicm 222: if (retval == CMD_RETURN_ERROR)
223: break;
224: if (retval == CMD_RETURN_WAIT)
225: goto out;
226: if (retval == CMD_RETURN_STOP) {
227: cmdq_flush(cmdq);
228: goto empty;
229: }
230: cmdq->cmd = TAILQ_NEXT(cmdq->cmd, qentry);
231: }
1.19 nicm 232: next = TAILQ_NEXT(cmdq->item, qentry);
1.1 nicm 233:
234: TAILQ_REMOVE(&cmdq->queue, cmdq->item, qentry);
235: cmd_list_free(cmdq->item->cmdlist);
236: free(cmdq->item);
237:
238: cmdq->item = next;
239: if (cmdq->item != NULL)
240: cmdq->cmd = TAILQ_FIRST(&cmdq->item->cmdlist->list);
241: } while (cmdq->item != NULL);
242:
243: empty:
1.11 nicm 244: if (cmdq->client_exit > 0)
1.1 nicm 245: cmdq->client->flags |= CLIENT_EXIT;
246: if (cmdq->emptyfn != NULL)
1.22 nicm 247: cmdq->emptyfn(cmdq);
1.1 nicm 248: empty = 1;
249:
250: out:
251: notify_enable();
1.22 nicm 252: cmdq_free(cmdq);
253:
1.1 nicm 254: return (empty);
255: }
256:
257: /* Flush command queue. */
258: void
259: cmdq_flush(struct cmd_q *cmdq)
260: {
261: struct cmd_q_item *item, *item1;
262:
263: TAILQ_FOREACH_SAFE(item, &cmdq->queue, qentry, item1) {
264: TAILQ_REMOVE(&cmdq->queue, item, qentry);
265: cmd_list_free(item->cmdlist);
266: free(item);
267: }
268: cmdq->item = NULL;
269: }
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