/* $OpenBSD: cmd-load-buffer.c,v 1.68 2026/10/09 13:12:14 nicm Exp $ */

/*

 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>

 *

 * 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 <errno.h>

#include <fcntl.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "tmux.h"

/*

 * Loads a paste buffer from a file.

 */

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

const struct cmd_entry cmd_load_buffer_entry = {

  .name = "load-buffer",

  .description = "Load a file into a paste buffer.",

  .alias = "loadb",

  .args = { "b:t:w", 1, 1, NULL },

  .usage = CMD_BUFFER_USAGE " " CMD_TARGET_CLIENT_USAGE " path",

  .flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,

  .exec = cmd_load_buffer_exec

};

struct cmd_load_buffer_data {

  struct client   *client;

  struct cmdq_item  *item;

  char      *name;

};

static void

cmd_load_buffer_done(__unused struct client *c, const char *path, int error,

    int closed, struct evbuffer *buffer, void *data)

{

  struct cmd_load_buffer_data *cdata = data;

  struct client     *tc = cdata->client;

  struct cmdq_item    *item = cdata->item;

  void        *bdata = EVBUFFER_DATA(buffer);

  size_t         bsize = EVBUFFER_LENGTH(buffer);

  void        *copy;

  char        *cause;

  if (!closed)

    return;

  if (error != 0)

    cmdq_error(item, "%s: %s", strerror(error), path);

  else if (bsize != 0) {

    copy = xmalloc(bsize);

    memcpy(copy, bdata, bsize);

    if (paste_set(copy, bsize, cdata->name, &cause) != 0) {

      cmdq_error(item, "%s", cause);

      free(cause);

      free(copy);

    } else if (tc != NULL &&

        tc->session != NULL &&

        (~tc->flags & CLIENT_DEAD))

      tty_set_selection(&tc->tty, "", copy, bsize);

  }

  if (tc != NULL)

    server_client_unref(tc);

  cmdq_continue(item);

  free(cdata->name);

  free(cdata);

}

static enum cmd_retval

cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)

{

  struct args     *args = cmd_get_args(self);

  struct client     *tc = cmdq_get_target_client(item);

  struct cmd_load_buffer_data *cdata;

  const char      *bufname = args_get(args, 'b');

  char        *path;

  cdata = xcalloc(1, sizeof *cdata);

  cdata->item = item;

  if (bufname != NULL)

    cdata->name = xstrdup(bufname);

  if (args_has(args, 'w') && tc != NULL) {

    cdata->client = tc;

    cdata->client->references++;

  }

  path = format_single_from_target(item, args_string(args, 0));

  file_read(cmdq_get_client(item), path, cmd_load_buffer_done, cdata);

  free(path);

  return (CMD_RETURN_WAIT);

}