Return to cfg.c CVS log

Up to [local] / src / usr.bin / tmux

Rewrite command queue handling. Each client still has a command queue,
but there is also now a global command queue. Instead of command queues
being dispatched on demand from wherever the command happens to be
added, they are now all dispatched from the top level server
loop. Command queues may now also include callbacks as well as commands,
and items may be inserted after the current command as well as at the end.

This all makes command queues significantly more predictable and easier
to use, and avoids the complex multiple nested command queues used by
source-file, if-shell and friends.

A mass rename of struct cmdq to a better name (cmdq_item probably) is
coming.

/* $OpenBSD: cfg.c,v 1.49 2016/10/16 17:55:14 nicm Exp $ */

/*
 * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * 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 <sys/types.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>

#include "tmux.h"

char			 *cfg_file;
int			  cfg_finished;
static char		**cfg_causes;
static u_int		  cfg_ncauses;
struct client		 *cfg_client;

static enum cmd_retval
cfg_done(__unused struct cmd_q *cmdq, __unused void *data)
{
	if (cfg_finished)
		return (CMD_RETURN_NORMAL);
	cfg_finished = 1;

	if (!RB_EMPTY(&sessions))
		cfg_show_causes(RB_MIN(sessions, &sessions));

	if (cfg_client != NULL)
		server_client_unref(cfg_client);
	return (CMD_RETURN_NORMAL);
}

void
set_cfg_file(const char *path)
{
	free(cfg_file);
	cfg_file = xstrdup(path);
}

void
start_cfg(void)
{
	const char	*home;
	int		 quiet = 0;

	cfg_client = TAILQ_FIRST(&clients);
	if (cfg_client != NULL)
		cfg_client->references++;

	load_cfg(TMUX_CONF, cfg_client, NULL, 1);

	if (cfg_file == NULL && (home = find_home()) != NULL) {
		xasprintf(&cfg_file, "%s/.tmux.conf", home);
		quiet = 1;
	}
	if (cfg_file != NULL)
		load_cfg(cfg_file, cfg_client, NULL, quiet);

	cmdq_append(cfg_client, cmdq_get_callback(cfg_done, NULL));
}

int
load_cfg(const char *path, struct client *c, struct cmd_q *cmdq, int quiet)
{
	FILE		*f;
	char		 delim[3] = { '\\', '\\', '\0' };
	u_int		 found;
	size_t		 line = 0;
	char		*buf, *cause1, *p;
	struct cmd_list	*cmdlist;
	struct cmd_q	*new_cmdq;

	log_debug("loading %s", path);
	if ((f = fopen(path, "rb")) == NULL) {
		if (errno == ENOENT && quiet)
			return (0);
		cfg_add_cause("%s: %s", path, strerror(errno));
		return (-1);
	}

	found = 0;
	while ((buf = fparseln(f, NULL, &line, delim, 0)) != NULL) {
		log_debug("%s: %s", path, buf);

		/* Skip empty lines. */
		p = buf;
		while (isspace((u_char) *p))
			p++;
		if (*p == '\0') {
			free(buf);
			continue;
		}

		/* Parse and run the command. */
		if (cmd_string_parse(p, &cmdlist, path, line, &cause1) != 0) {
			free(buf);
			if (cause1 == NULL)
				continue;
			cfg_add_cause("%s:%zu: %s", path, line, cause1);
			free(cause1);
			continue;
		}
		free(buf);

		if (cmdlist == NULL)
			continue;
		new_cmdq = cmdq_get_command(cmdlist, NULL, NULL, 0);
		if (cmdq != NULL)
			cmdq_insert_after(cmdq, new_cmdq);
		else
			cmdq_append(c, new_cmdq);
		cmd_list_free(cmdlist);

		found++;
	}
	fclose(f);

	return (found);
}

void
cfg_add_cause(const char *fmt, ...)
{
	va_list	 ap;
	char	*msg;

	va_start(ap, fmt);
	xvasprintf(&msg, fmt, ap);
	va_end(ap);

	cfg_ncauses++;
	cfg_causes = xreallocarray(cfg_causes, cfg_ncauses, sizeof *cfg_causes);
	cfg_causes[cfg_ncauses - 1] = msg;
}

void
cfg_print_causes(struct cmd_q *cmdq)
{
	u_int	 i;

	for (i = 0; i < cfg_ncauses; i++) {
		cmdq_print(cmdq, "%s", cfg_causes[i]);
		free(cfg_causes[i]);
	}

	free(cfg_causes);
	cfg_causes = NULL;
	cfg_ncauses = 0;
}

void
cfg_show_causes(struct session *s)
{
	struct window_pane	*wp;
	u_int			 i;

	if (s == NULL || cfg_ncauses == 0)
		return;
	wp = s->curw->window->active;

	window_pane_set_mode(wp, &window_copy_mode);
	window_copy_init_for_output(wp);
	for (i = 0; i < cfg_ncauses; i++) {
		window_copy_add(wp, "%s", cfg_causes[i]);
		free(cfg_causes[i]);
	}

	free(cfg_causes);
	cfg_causes = NULL;
	cfg_ncauses = 0;
}