/* $OpenBSD: cmd-kill-session.c,v 1.32 2026/10/09 13:12:14 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",

  .description = "Destroy one or more sessions.",

  .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);

}