/* $OpenBSD$ */

/*

 * 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 <sys/stat.h>

#include <errno.h>

#include <fcntl.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "tmux.h"

/*

 * Saves a paste buffer to a file.

 */

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

const struct cmd_entry cmd_save_buffer_entry = {

  .name = "save-buffer",

  .alias = "saveb",

  .args = { "ab:", 1, 1, NULL },

  .usage = "[-a] " CMD_BUFFER_USAGE " path",

  .flags = CMD_AFTERHOOK,

  .exec = cmd_save_buffer_exec

};

const struct cmd_entry cmd_show_buffer_entry = {

  .name = "show-buffer",

  .alias = "showb",

  .args = { "b:", 0, 0, NULL },

  .usage = CMD_BUFFER_USAGE,

  .flags = CMD_AFTERHOOK,

  .exec = cmd_save_buffer_exec

};

static void

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

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

{

  struct cmdq_item  *item = data;

  if (!closed)

    return;

  if (error != 0)

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

  cmdq_continue(item);

}

static enum cmd_retval

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

{

  struct args   *args = cmd_get_args(self);

  struct client   *c = cmdq_get_client(item);

  struct paste_buffer *pb;

  int      flags;

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

  size_t       bufsize;

  char      *path;

  struct evbuffer   *evb;

  if (bufname == NULL) {

    if ((pb = paste_get_top(NULL)) == NULL) {

      cmdq_error(item, "no buffers");

      return (CMD_RETURN_ERROR);

    }

  } else {

    pb = paste_get_name(bufname);

    if (pb == NULL) {

      cmdq_error(item, "no buffer %s", bufname);

      return (CMD_RETURN_ERROR);

    }

  }

  bufdata = paste_buffer_data(pb, &bufsize);

  if (cmd_get_entry(self) == &cmd_show_buffer_entry) {

    if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {

      evb = evbuffer_new();

      if (evb == NULL)

        fatalx("out of memory");

      evbuffer_add(evb, bufdata, bufsize);

      cmdq_print_data(item, evb);

      evbuffer_free(evb);

      return (CMD_RETURN_NORMAL);

    }

    path = xstrdup("-");

  } else

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

  if (args_has(args, 'a'))

    flags = O_APPEND;

  else

    flags = O_TRUNC;

  file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,

      cmd_save_buffer_done, item);

  free(path);

  return (CMD_RETURN_WAIT);

}