cmd-save-buffer.c revision 1.48 
1/* $OpenBSD: cmd-save-buffer.c,v 1.48 2020/04/13 08:26:27 nicm Exp $ */
2
3/*
4 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <sys/types.h>
20#include <sys/stat.h>
21
22#include <errno.h>
23#include <fcntl.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.h>
27#include <vis.h>
28
29#include "tmux.h"
30
31/*
32 * Saves a paste buffer to a file.
33 */
34
35static enum cmd_retval	cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
36
37const struct cmd_entry cmd_save_buffer_entry = {
38	.name = "save-buffer",
39	.alias = "saveb",
40
41	.args = { "ab:", 1, 1 },
42	.usage = "[-a] " CMD_BUFFER_USAGE " path",
43
44	.flags = CMD_AFTERHOOK,
45	.exec = cmd_save_buffer_exec
46};
47
48const struct cmd_entry cmd_show_buffer_entry = {
49	.name = "show-buffer",
50	.alias = "showb",
51
52	.args = { "b:", 0, 0 },
53	.usage = CMD_BUFFER_USAGE,
54
55	.flags = CMD_AFTERHOOK,
56	.exec = cmd_save_buffer_exec
57};
58
59static void
60cmd_save_buffer_done(__unused struct client *c, const char *path, int error,
61    __unused int closed, __unused struct evbuffer *buffer, void *data)
62{
63	struct cmdq_item	*item = data;
64
65	if (!closed)
66		return;
67
68	if (error != 0)
69		cmdq_error(item, "%s: %s", path, strerror(error));
70	cmdq_continue(item);
71}
72
73static enum cmd_retval
74cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
75{
76	struct args		*args = cmd_get_args(self);
77	struct client		*c = cmd_find_client(item, NULL, 1);
78	struct session		*s = item->target.s;
79	struct winlink		*wl = item->target.wl;
80	struct window_pane	*wp = item->target.wp;
81	struct paste_buffer	*pb;
82	int			 flags;
83	const char		*bufname = args_get(args, 'b'), *bufdata;
84	size_t			 bufsize;
85	char			*path;
86
87	if (bufname == NULL) {
88		if ((pb = paste_get_top(NULL)) == NULL) {
89			cmdq_error(item, "no buffers");
90			return (CMD_RETURN_ERROR);
91		}
92	} else {
93		pb = paste_get_name(bufname);
94		if (pb == NULL) {
95			cmdq_error(item, "no buffer %s", bufname);
96			return (CMD_RETURN_ERROR);
97		}
98	}
99	bufdata = paste_buffer_data(pb, &bufsize);
100
101	if (cmd_get_entry(self) == &cmd_show_buffer_entry)
102		path = xstrdup("-");
103	else
104		path = format_single(item, args->argv[0], c, s, wl, wp);
105	if (args_has(args, 'a'))
106		flags = O_APPEND;
107	else
108		flags = 0;
109	file_write(item->client, path, flags, bufdata, bufsize,
110	    cmd_save_buffer_done, item);
111	free(path);
112
113	return (CMD_RETURN_WAIT);
114}
115