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Annotation of src/usr.bin/tmux/control.c, Revision 1.19

1.19    ! nicm        1: /* $OpenBSD: control.c,v 1.18 2016/10/16 17:55:14 nicm Exp $ */
1.1       nicm        2:
                      3: /*
1.17      nicm        4:  * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1       nicm        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>
1.2       nicm       23: #include <stdlib.h>
1.1       nicm       24: #include <string.h>
1.10      nicm       25: #include <time.h>
1.1       nicm       26:
                     27: #include "tmux.h"
                     28:
                     29: /* Write a line. */
1.13      nicm       30: void
1.1       nicm       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:
1.4       nicm       39:        evbuffer_add(c->stdout_data, "\n", 1);
1.15      nicm       40:        server_client_push_stdout(c);
1.4       nicm       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);
1.1       nicm       48:        evbuffer_add(c->stdout_data, "\n", 1);
1.15      nicm       49:        server_client_push_stdout(c);
1.1       nicm       50: }
                     51:
1.18      nicm       52: /* Control error callback. */
                     53: static enum cmd_retval
1.19    ! nicm       54: control_error(struct cmdq_item *item, void *data)
1.18      nicm       55: {
1.19    ! nicm       56:        struct client   *c = item->client;
1.18      nicm       57:        char            *error = data;
                     58:
1.19    ! nicm       59:        cmdq_guard(item, "begin", 1);
1.18      nicm       60:        control_write(c, "parse error: %s", error);
1.19    ! nicm       61:        cmdq_guard(item, "error", 1);
1.18      nicm       62:
                     63:        free(error);
                     64:        return (CMD_RETURN_NORMAL);
                     65: }
                     66:
1.1       nicm       67: /* Control input callback. Read lines and fire commands. */
                     68: void
1.16      nicm       69: control_callback(struct client *c, int closed, __unused void *data)
1.1       nicm       70: {
1.19    ! nicm       71:        char                    *line, *cause;
        !            72:        struct cmd_list         *cmdlist;
        !            73:        struct cmd              *cmd;
        !            74:        struct cmdq_item        *item;
1.1       nicm       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:
1.8       nicm       88:                if (cmd_string_parse(line, &cmdlist, NULL, 0, &cause) != 0) {
1.19    ! nicm       89:                        item = cmdq_get_callback(control_error, cause);
        !            90:                        cmdq_append(c, item);
1.1       nicm       91:                } else {
1.11      nicm       92:                        TAILQ_FOREACH(cmd, &cmdlist->list, qentry)
                     93:                                cmd->flags |= CMD_CONTROL;
1.19    ! nicm       94:                        item = cmdq_get_command(cmdlist, NULL, NULL, 0);
        !            95:                        cmdq_append(c, item);
1.1       nicm       96:                        cmd_list_free(cmdlist);
                     97:                }
                     98:
1.2       nicm       99:                free(line);
1.1       nicm      100:        }
                    101: }