text: /* $OpenBSD: cmd-respawn-pane.c,v 1.20 2016/01/19 15:59:12 nicm Exp $ */
  
  /*
   * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
   * Copyright (c) 2011 Marcel P. Partap <mpartap@gmx.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 <stdlib.h>
  #include <unistd.h>
  
  #include "tmux.h"
  
  /*
   * Respawn a pane (restart the command). Kill existing if -k given.
   */
  
  enum cmd_retval	 cmd_respawn_pane_exec(struct cmd *, struct cmd_q *);
  
  const struct cmd_entry cmd_respawn_pane_entry = {
  	.name = "respawn-pane",
  	.alias = "respawnp",
  
  	.args = { "kt:", 0, -1 },
  	.usage = "[-k] " CMD_TARGET_PANE_USAGE " [command]",
  
  	.tflag = CMD_PANE,
  
  	.flags = 0,
  	.exec = cmd_respawn_pane_exec
  };
  
  enum cmd_retval
  cmd_respawn_pane_exec(struct cmd *self, struct cmd_q *cmdq)
  {
  	struct args		*args = self->args;
  	struct winlink		*wl = cmdq->state.tflag.wl;
  	struct window		*w = wl->window;
  	struct window_pane	*wp = cmdq->state.tflag.wp;
  	struct session		*s = cmdq->state.tflag.s;
  	struct environ		*env;
  	const char		*path;
  	char			*cause;
  	u_int			 idx;
  	struct environ_entry	*envent;
  
  	if (!args_has(self->args, 'k') && wp->fd != -1) {
  		if (window_pane_index(wp, &idx) != 0)
  			fatalx("index not found");
  		cmdq_error(cmdq, "pane still active: %s:%d.%u",
  		    s->name, wl->idx, idx);
  		return (CMD_RETURN_ERROR);
  	}
  
  	env = environ_create();
  	environ_copy(global_environ, env);
  	environ_copy(s->environ, env);
  	server_fill_environ(s, env);
  
  	window_pane_reset_mode(wp);
  	screen_reinit(&wp->base);
  	input_init(wp);
  
  	path = NULL;
  	if (cmdq->client != NULL && cmdq->client->session == NULL)
  		envent = environ_find(cmdq->client->environ, "PATH");
  	else
  		envent = environ_find(s->environ, "PATH");
  	if (envent != NULL)
  		path = envent->value;
  
  	if (window_pane_spawn(wp, args->argc, args->argv, path, NULL, NULL, env,
  	    s->tio, &cause) != 0) {
  		cmdq_error(cmdq, "respawn pane failed: %s", cause);
  		free(cause);
  		environ_free(env);
  		return (CMD_RETURN_ERROR);
  	}
  	wp->flags |= PANE_REDRAW;
  	server_status_window(w);
  
  	environ_free(env);
  	return (CMD_RETURN_NORMAL);
  }
  