cmd-save-buffer.c revision 1.54 
1/* $OpenBSD: cmd-save-buffer.c,v 1.54 2021/08/21 10:22:39 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, NULL },
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, NULL },
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 = cmdq_get_client(item);
78	struct paste_buffer	*pb;
79	int			 flags;
80	const char		*bufname = args_get(args, 'b'), *bufdata;
81	size_t			 bufsize;
82	char			*path, *tmp;
83
84	if (bufname == NULL) {
85		if ((pb = paste_get_top(NULL)) == NULL) {
86			cmdq_error(item, "no buffers");
87			return (CMD_RETURN_ERROR);
88		}
89	} else {
90		pb = paste_get_name(bufname);
91		if (pb == NULL) {
92			cmdq_error(item, "no buffer %s", bufname);
93			return (CMD_RETURN_ERROR);
94		}
95	}
96	bufdata = paste_buffer_data(pb, &bufsize);
97
98	if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
99		if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
100			utf8_stravisx(&tmp, bufdata, bufsize,
101			    VIS_OCTAL|VIS_CSTYLE|VIS_TAB);
102			cmdq_print(item, "%s", tmp);
103			free(tmp);
104			return (CMD_RETURN_NORMAL);
105		}
106		path = xstrdup("-");
107	} else
108		path = format_single_from_target(item, args_string(args, 0));
109	if (args_has(args, 'a'))
110		flags = O_APPEND;
111	else
112		flags = O_TRUNC;
113	file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
114	    cmd_save_buffer_done, item);
115	free(path);
116
117	return (CMD_RETURN_WAIT);
118}
119