/* $OpenBSD: cmd-kill-session.c,v 1.31 2026/06/09 12:57:40 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 "tmux.h"

/*
 * Destroy session, detaching all clients attached to it and destroying any
 * windows linked only to this session.
 *
 * Note this deliberately has no alias to make it hard to hit by accident.
 */

static enum cmd_retval  cmd_kill_session_exec(struct cmd *, struct cmdq_item *);
static enum cmd_retval  cmd_kill_session_all(struct cmdq_item *, const char *);
static int              cmd_kill_session_filter(struct cmdq_item *,
                            struct session *, const char *);

const struct cmd_entry cmd_kill_session_entry = {
        .name = "kill-session",
        .alias = NULL,

        .args = { "aCgf:t:", 0, 0, NULL },
        .usage = "[-aCg] [-f filter] " CMD_TARGET_SESSION_USAGE,

        .target = { 't', CMD_FIND_SESSION, 0 },

        .flags = 0,
        .exec = cmd_kill_session_exec
};

static enum cmd_retval
cmd_kill_session_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct session          *s = target->s, *sloop, *stmp;
        struct session_group    *sg;
        struct winlink          *wl;
        const char              *filter = args_get(args, 'f');

        if (filter != NULL && (!args_has(args, 'a') || args_has(args, 'C'))) {
                cmdq_error(item, "-f only valid with -a");
                return (CMD_RETURN_ERROR);
        }

        if (args_has(args, 'C')) {
                RB_FOREACH(wl, winlinks, &s->windows) {
                        wl->window->flags &= ~WINDOW_ALERTFLAGS;
                        wl->flags &= ~WINLINK_ALERTFLAGS;
                }
                server_redraw_session(s);
        } else if (args_has(args, 'a'))
                return (cmd_kill_session_all(item, filter));
        else if (args_has(args, 'g') &&
            (sg = session_group_contains(s)) != NULL) {
                TAILQ_FOREACH_SAFE(sloop, &sg->sessions, gentry, stmp) {
                        server_destroy_session(sloop);
                        session_destroy(sloop, 1, __func__);
                }
        } else {
                server_destroy_session(s);
                session_destroy(s, 1, __func__);
        }
        return (CMD_RETURN_NORMAL);
}

static enum cmd_retval
cmd_kill_session_all(struct cmdq_item *item, const char *filter)
{
        struct session  *s = cmdq_get_target(item)->s;
        struct session  *sloop, *stmp;

        RB_FOREACH_SAFE(sloop, sessions, &sessions, stmp) {
                if (sloop == s)
                        continue;
                if (!cmd_kill_session_filter(item, sloop, filter))
                        continue;
                server_destroy_session(sloop);
                session_destroy(sloop, 1, __func__);
        }
        return (CMD_RETURN_NORMAL);
}

static int
cmd_kill_session_filter(struct cmdq_item *item, struct session *s,
    const char *filter)
{
        struct format_tree      *ft;
        char                    *expanded;
        int                      flag;

        if (filter == NULL)
                return (1);

        ft = format_create(cmdq_get_client(item), item, FORMAT_NONE, 0);
        format_defaults(ft, NULL, s, NULL, NULL);

        expanded = format_expand(ft, filter);
        flag = format_true(expanded);
        free(expanded);

        format_free(ft);
        return (flag);
}