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Annotation of embedaddon/tmux/control.c, revision 1.1.1.1

1.1       misho       1: /* $OpenBSD$ */
                      2: 
                      3: /*
                      4:  * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
                      5:  * Copyright (c) 2012 George Nachman <tmux@georgester.com>
                      6:  *
                      7:  * Permission to use, copy, modify, and distribute this software for any
                      8:  * purpose with or without fee is hereby granted, provided that the above
                      9:  * copyright notice and this permission notice appear in all copies.
                     10:  *
                     11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     15:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
                     16:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
                     17:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     18:  */
                     19: 
                     20: #include <sys/types.h>
                     21: 
                     22: #include <event.h>
                     23: #include <stdlib.h>
                     24: #include <string.h>
                     25: #include <time.h>
                     26: 
                     27: #include "tmux.h"
                     28: 
                     29: /* Write a line. */
                     30: void
                     31: control_write(struct client *c, const char *fmt, ...)
                     32: {
                     33:        va_list          ap;
                     34: 
                     35:        va_start(ap, fmt);
                     36:        evbuffer_add_vprintf(c->stdout_data, fmt, ap);
                     37:        va_end(ap);
                     38: 
                     39:        evbuffer_add(c->stdout_data, "\n", 1);
                     40:        server_client_push_stdout(c);
                     41: }
                     42: 
                     43: /* Write a buffer, adding a terminal newline. Empties buffer. */
                     44: void
                     45: control_write_buffer(struct client *c, struct evbuffer *buffer)
                     46: {
                     47:        evbuffer_add_buffer(c->stdout_data, buffer);
                     48:        evbuffer_add(c->stdout_data, "\n", 1);
                     49:        server_client_push_stdout(c);
                     50: }
                     51: 
                     52: /* Control error callback. */
                     53: static enum cmd_retval
                     54: control_error(struct cmdq_item *item, void *data)
                     55: {
                     56:        struct client   *c = item->client;
                     57:        char            *error = data;
                     58: 
                     59:        cmdq_guard(item, "begin", 1);
                     60:        control_write(c, "parse error: %s", error);
                     61:        cmdq_guard(item, "error", 1);
                     62: 
                     63:        free(error);
                     64:        return (CMD_RETURN_NORMAL);
                     65: }
                     66: 
                     67: /* Control input callback. Read lines and fire commands. */
                     68: void
                     69: control_callback(struct client *c, int closed, __unused void *data)
                     70: {
                     71:        char                    *line, *cause;
                     72:        struct cmd_list         *cmdlist;
                     73:        struct cmd              *cmd;
                     74:        struct cmdq_item        *item;
                     75: 
                     76:        if (closed)
                     77:                c->flags |= CLIENT_EXIT;
                     78: 
                     79:        for (;;) {
                     80:                line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF);
                     81:                if (line == NULL)
                     82:                        break;
                     83:                if (*line == '\0') { /* empty line exit */
                     84:                        c->flags |= CLIENT_EXIT;
                     85:                        break;
                     86:                }
                     87: 
                     88:                cmdlist = cmd_string_parse(line, NULL, 0, &cause);
                     89:                if (cmdlist == NULL) {
                     90:                        item = cmdq_get_callback(control_error, cause);
                     91:                        cmdq_append(c, item);
                     92:                } else {
                     93:                        TAILQ_FOREACH(cmd, &cmdlist->list, qentry)
                     94:                                cmd->flags |= CMD_CONTROL;
                     95:                        item = cmdq_get_command(cmdlist, NULL, NULL, 0);
                     96:                        cmdq_append(c, item);
                     97:                        cmd_list_free(cmdlist);
                     98:                }
                     99: 
                    100:                free(line);
                    101:        }
                    102: }