/* $OpenBSD: control.c,v 1.20 2017/01/15 22:00:56 nicm Exp $ */ /* * Copyright (c) 2012 Nicholas Marriott * Copyright (c) 2012 George Nachman * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include "tmux.h" /* Write a line. */ void control_write(struct client *c, const char *fmt, ...) { va_list ap; va_start(ap, fmt); evbuffer_add_vprintf(c->stdout_data, fmt, ap); va_end(ap); evbuffer_add(c->stdout_data, "\n", 1); server_client_push_stdout(c); } /* Write a buffer, adding a terminal newline. Empties buffer. */ void control_write_buffer(struct client *c, struct evbuffer *buffer) { evbuffer_add_buffer(c->stdout_data, buffer); evbuffer_add(c->stdout_data, "\n", 1); server_client_push_stdout(c); } /* Control error callback. */ static enum cmd_retval control_error(struct cmdq_item *item, void *data) { struct client *c = item->client; char *error = data; cmdq_guard(item, "begin", 1); control_write(c, "parse error: %s", error); cmdq_guard(item, "error", 1); free(error); return (CMD_RETURN_NORMAL); } /* Control input callback. Read lines and fire commands. */ void control_callback(struct client *c, int closed, __unused void *data) { char *line, *cause; struct cmd_list *cmdlist; struct cmd *cmd; struct cmdq_item *item; if (closed) c->flags |= CLIENT_EXIT; for (;;) { line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF); if (line == NULL) break; if (*line == '\0') { /* empty line exit */ c->flags |= CLIENT_EXIT; break; } cmdlist = cmd_string_parse(line, NULL, 0, &cause); if (cmdlist == NULL) { item = cmdq_get_callback(control_error, cause); cmdq_append(c, item); } else { TAILQ_FOREACH(cmd, &cmdlist->list, qentry) cmd->flags |= CMD_CONTROL; item = cmdq_get_command(cmdlist, NULL, NULL, 0); cmdq_append(c, item); cmd_list_free(cmdlist); } free(line); } }