xref: /openbsd-src/usr.bin/tmux/cmd-set-buffer.c (revision 46035553bfdd96e63c94e32da0210227ec2e3cf1)
1 /* $OpenBSD: cmd-set-buffer.c,v 1.30 2020/09/02 13:46:35 nicm Exp $ */
2 
3 /*
4  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 
21 #include <stdlib.h>
22 #include <string.h>
23 
24 #include "tmux.h"
25 
26 /*
27  * Add, set, append to or delete a paste buffer.
28  */
29 
30 static enum cmd_retval	cmd_set_buffer_exec(struct cmd *, struct cmdq_item *);
31 
32 const struct cmd_entry cmd_set_buffer_entry = {
33 	.name = "set-buffer",
34 	.alias = "setb",
35 
36 	.args = { "ab:t:n:w", 0, 1 },
37 	.usage = "[-aw] " CMD_BUFFER_USAGE " [-n new-buffer-name] "
38 	         CMD_TARGET_CLIENT_USAGE " data",
39 
40 	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,
41 	.exec = cmd_set_buffer_exec
42 };
43 
44 const struct cmd_entry cmd_delete_buffer_entry = {
45 	.name = "delete-buffer",
46 	.alias = "deleteb",
47 
48 	.args = { "b:", 0, 0 },
49 	.usage = CMD_BUFFER_USAGE,
50 
51 	.flags = CMD_AFTERHOOK,
52 	.exec = cmd_set_buffer_exec
53 };
54 
55 static enum cmd_retval
56 cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
57 {
58 	struct args		*args = cmd_get_args(self);
59 	struct client		*tc = cmdq_get_target_client(item);
60 	struct paste_buffer	*pb;
61 	char			*bufdata, *cause;
62 	const char		*bufname, *olddata;
63 	size_t			 bufsize, newsize;
64 
65 	bufname = args_get(args, 'b');
66 	if (bufname == NULL)
67 		pb = NULL;
68 	else
69 		pb = paste_get_name(bufname);
70 
71 	if (cmd_get_entry(self) == &cmd_delete_buffer_entry) {
72 		if (pb == NULL)
73 			pb = paste_get_top(&bufname);
74 		if (pb == NULL) {
75 			cmdq_error(item, "no buffer");
76 			return (CMD_RETURN_ERROR);
77 		}
78 		paste_free(pb);
79 		return (CMD_RETURN_NORMAL);
80 	}
81 
82 	if (args_has(args, 'n')) {
83 		if (pb == NULL)
84 			pb = paste_get_top(&bufname);
85 		if (pb == NULL) {
86 			cmdq_error(item, "no buffer");
87 			return (CMD_RETURN_ERROR);
88 		}
89 		if (paste_rename(bufname, args_get(args, 'n'), &cause) != 0) {
90 			cmdq_error(item, "%s", cause);
91 			free(cause);
92 			return (CMD_RETURN_ERROR);
93 		}
94 		return (CMD_RETURN_NORMAL);
95 	}
96 
97 	if (args->argc != 1) {
98 		cmdq_error(item, "no data specified");
99 		return (CMD_RETURN_ERROR);
100 	}
101 	if ((newsize = strlen(args->argv[0])) == 0)
102 		return (CMD_RETURN_NORMAL);
103 
104 	bufsize = 0;
105 	bufdata = NULL;
106 
107 	if (args_has(args, 'a') && pb != NULL) {
108 		olddata = paste_buffer_data(pb, &bufsize);
109 		bufdata = xmalloc(bufsize);
110 		memcpy(bufdata, olddata, bufsize);
111 	}
112 
113 	bufdata = xrealloc(bufdata, bufsize + newsize);
114 	memcpy(bufdata + bufsize, args->argv[0], newsize);
115 	bufsize += newsize;
116 
117 	if (paste_set(bufdata, bufsize, bufname, &cause) != 0) {
118 		cmdq_error(item, "%s", cause);
119 		free(bufdata);
120 		free(cause);
121 		return (CMD_RETURN_ERROR);
122 	}
123 	if (args_has(args, 'w') && tc != NULL)
124  		tty_set_selection(&tc->tty, bufdata, bufsize);
125 
126 	return (CMD_RETURN_NORMAL);
127 }
128