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Give each client a name. This defaults to the tty name as before but
falls back to an alternative if the tty name is not available. This is
clearer than overloading the client ttyname member and allows us to
remove the path stored in the tty struct, it should always be the same
as the client.

/* $OpenBSD: cmd-list-clients.c,v 1.32 2017/04/05 10:49:46 nicm Exp $ */

/*
 * Copyright (c) 2007 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 <stdlib.h>
#include <string.h>
#include <time.h>

#include "tmux.h"

/*
 * List all clients.
 */

#define LIST_CLIENTS_TEMPLATE					\
	"#{client_name}: #{session_name} "			\
	"[#{client_width}x#{client_height} #{client_termname}]"	\
	"#{?client_utf8, (utf8),} #{?client_readonly, (ro),}"

static enum cmd_retval	cmd_list_clients_exec(struct cmd *, struct cmdq_item *);

const struct cmd_entry cmd_list_clients_entry = {
	.name = "list-clients",
	.alias = "lsc",

	.args = { "F:t:", 0, 0 },
	.usage = "[-F format] " CMD_TARGET_SESSION_USAGE,

	.tflag = CMD_SESSION,

	.flags = CMD_READONLY|CMD_AFTERHOOK,
	.exec = cmd_list_clients_exec
};

static enum cmd_retval
cmd_list_clients_exec(struct cmd *self, struct cmdq_item *item)
{
	struct args 		*args = self->args;
	struct client		*c;
	struct session		*s;
	struct format_tree	*ft;
	const char		*template;
	u_int			 idx;
	char			*line;

	if (args_has(args, 't'))
		s = item->state.tflag.s;
	else
		s = NULL;

	if ((template = args_get(args, 'F')) == NULL)
		template = LIST_CLIENTS_TEMPLATE;

	idx = 0;
	TAILQ_FOREACH(c, &clients, entry) {
		if (c->session == NULL || (s != NULL && s != c->session))
			continue;

		ft = format_create(item, FORMAT_NONE, 0);
		format_add(ft, "line", "%u", idx);
		format_defaults(ft, c, NULL, NULL, NULL);

		line = format_expand(ft, template);
		cmdq_print(item, "%s", line);
		free(line);

		format_free(ft);

		idx++;
	}

	return (CMD_RETURN_NORMAL);
}