1 /* $OpenBSD$ */
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
28 #include "tmux.h"
29
30 /*
31 * Saves a paste buffer to a file.
32 */
33
34 enum cmd_retval cmd_save_buffer_exec(struct cmd *, struct cmd_q *);
35
36 const struct cmd_entry cmd_save_buffer_entry = {
37 .name = "save-buffer",
38 .alias = "saveb",
39
40 .args = { "ab:", 1, 1 },
41 .usage = "[-a] " CMD_BUFFER_USAGE " path",
42
43 .flags = 0,
44 .exec = cmd_save_buffer_exec
45 };
46
47 const struct cmd_entry cmd_show_buffer_entry = {
48 .name = "show-buffer",
49 .alias = "showb",
50
51 .args = { "b:", 0, 0 },
52 .usage = CMD_BUFFER_USAGE,
53
54 .flags = 0,
55 .exec = cmd_save_buffer_exec
56 };
57
58 enum cmd_retval
cmd_save_buffer_exec(struct cmd * self,struct cmd_q * cmdq)59 cmd_save_buffer_exec(struct cmd *self, struct cmd_q *cmdq)
60 {
61 struct args *args = self->args;
62 struct client *c = cmdq->client;
63 struct session *s;
64 struct paste_buffer *pb;
65 const char *path, *bufname, *bufdata, *start, *end, *cwd;
66 const char *flags;
67 char *msg, *file, resolved[PATH_MAX];
68 size_t size, used, msglen, bufsize;
69 FILE *f;
70
71 if (!args_has(args, 'b')) {
72 if ((pb = paste_get_top(NULL)) == NULL) {
73 cmdq_error(cmdq, "no buffers");
74 return (CMD_RETURN_ERROR);
75 }
76 } else {
77 bufname = args_get(args, 'b');
78 pb = paste_get_name(bufname);
79 if (pb == NULL) {
80 cmdq_error(cmdq, "no buffer %s", bufname);
81 return (CMD_RETURN_ERROR);
82 }
83 }
84 bufdata = paste_buffer_data(pb, &bufsize);
85
86 if (self->entry == &cmd_show_buffer_entry)
87 path = "-";
88 else
89 path = args->argv[0];
90 if (strcmp(path, "-") == 0) {
91 if (c == NULL) {
92 cmdq_error(cmdq, "can't write to stdout");
93 return (CMD_RETURN_ERROR);
94 }
95 if (c->session == NULL || (c->flags & CLIENT_CONTROL))
96 goto do_stdout;
97 goto do_print;
98 }
99
100 if (c != NULL && c->session == NULL && c->cwd != NULL)
101 cwd = c->cwd;
102 else if ((s = c->session) != NULL && s->cwd != NULL)
103 cwd = s->cwd;
104 else
105 cwd = ".";
106
107 flags = "wb";
108 if (args_has(self->args, 'a'))
109 flags = "ab";
110
111 if (*path == '/')
112 file = xstrdup(path);
113 else
114 xasprintf(&file, "%s/%s", cwd, path);
115 if (realpath(file, resolved) == NULL &&
116 strlcpy(resolved, file, sizeof resolved) >= sizeof resolved) {
117 cmdq_error(cmdq, "%s: %s", file, strerror(ENAMETOOLONG));
118 return (CMD_RETURN_ERROR);
119 }
120 f = fopen(resolved, flags);
121 free(file);
122 if (f == NULL) {
123 cmdq_error(cmdq, "%s: %s", resolved, strerror(errno));
124 return (CMD_RETURN_ERROR);
125 }
126
127 if (fwrite(bufdata, 1, bufsize, f) != bufsize) {
128 cmdq_error(cmdq, "%s: write error", resolved);
129 fclose(f);
130 return (CMD_RETURN_ERROR);
131 }
132 fclose(f);
133
134 return (CMD_RETURN_NORMAL);
135
136 do_stdout:
137 evbuffer_add(c->stdout_data, bufdata, bufsize);
138 server_client_push_stdout(c);
139 return (CMD_RETURN_NORMAL);
140
141 do_print:
142 if (bufsize > (INT_MAX / 4) - 1) {
143 cmdq_error(cmdq, "buffer too big");
144 return (CMD_RETURN_ERROR);
145 }
146 msg = NULL;
147
148 used = 0;
149 while (used != bufsize) {
150 start = bufdata + used;
151 end = memchr(start, '\n', bufsize - used);
152 if (end != NULL)
153 size = end - start;
154 else
155 size = bufsize - used;
156
157 msglen = size * 4 + 1;
158 msg = xrealloc(msg, msglen);
159
160 strvisx(msg, start, size, VIS_OCTAL|VIS_TAB);
161 cmdq_print(cmdq, "%s", msg);
162
163 used += size + (end != NULL);
164 }
165
166 free(msg);
167 return (CMD_RETURN_NORMAL);
168 }
169