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Use a char **,u_int pair for cfg_causes.

/* $OpenBSD: cfg.c,v 1.35 2015/04/25 18:47:01 nicm Exp $ */

/*
 * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * 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 <util.h>

#include "tmux.h"

struct cmd_q		*cfg_cmd_q;
int			 cfg_finished;
int			 cfg_references;
char**			 cfg_causes;
u_int			 cfg_ncauses;
struct client		*cfg_client;

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

	log_debug("loading %s", path);
	if ((f = fopen(path, "rb")) == NULL) {
		xasprintf(cause, "%s: %s", path, strerror(errno));
		return (-1);
	}

	found = 0;
	while ((buf = fparseln(f, NULL, &line, delim, 0))) {
		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;
		cmdq_append(cmdq, cmdlist, NULL);
		cmd_list_free(cmdlist);
		found++;
	}
	fclose(f);

	return (found);
}

void
cfg_default_done(unused struct cmd_q *cmdq)
{
	if (--cfg_references != 0)
		return;
	cfg_finished = 1;

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

	cmdq_free(cfg_cmd_q);
	cfg_cmd_q = NULL;

	if (cfg_client != NULL) {
		/*
		 * The client command queue starts with client_exit set to 1 so
		 * only continue if not empty (that is, we have been delayed
		 * during configuration parsing for long enough that the
		 * MSG_COMMAND has arrived), else the client will exit before
		 * the MSG_COMMAND which might tell it not to.
		 */
		if (!TAILQ_EMPTY(&cfg_client->cmdq->queue))
			cmdq_continue(cfg_client->cmdq);
		cfg_client->references--;
		cfg_client = NULL;
	}
}

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;
}

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;
}