/* $OpenBSD: cmd-load-buffer.c,v 1.66 2025/10/28 07:32:26 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",
        .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);
}