1 /* $OpenBSD: cmd-save-buffer.c,v 1.56 2024/11/22 12:58:05 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
35 static enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);
36
37 const 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
48 const 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
59 static void
cmd_save_buffer_done(__unused struct client * c,const char * path,int error,__unused int closed,__unused struct evbuffer * buffer,void * data)60 cmd_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
73 static enum cmd_retval
cmd_save_buffer_exec(struct cmd * self,struct cmdq_item * item)74 cmd_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;
83 struct evbuffer *evb;
84
85 if (bufname == NULL) {
86 if ((pb = paste_get_top(NULL)) == NULL) {
87 cmdq_error(item, "no buffers");
88 return (CMD_RETURN_ERROR);
89 }
90 } else {
91 pb = paste_get_name(bufname);
92 if (pb == NULL) {
93 cmdq_error(item, "no buffer %s", bufname);
94 return (CMD_RETURN_ERROR);
95 }
96 }
97 bufdata = paste_buffer_data(pb, &bufsize);
98
99 if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
100 if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
101 evb = evbuffer_new();
102 if (evb == NULL)
103 fatalx("out of memory");
104 evbuffer_add(evb, bufdata, bufsize);
105 cmdq_print_data(item, evb);
106 evbuffer_free(evb);
107 return (CMD_RETURN_NORMAL);
108 }
109 path = xstrdup("-");
110 } else
111 path = format_single_from_target(item, args_string(args, 0));
112 if (args_has(args, 'a'))
113 flags = O_APPEND;
114 else
115 flags = O_TRUNC;
116 file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
117 cmd_save_buffer_done, item);
118 free(path);
119
120 return (CMD_RETURN_WAIT);
121 }
122