1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* guestfish - the filesystem interactive shell
* Copyright (C) 2009 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#define _GNU_SOURCE // for strndup, asprintf
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_LIBREADLINE
#include <readline/readline.h>
#endif
#include <guestfs.h>
#include "fish.h"
/* Readline completion for paths on the guest filesystem, also for
* devices and LVM names.
*/
int complete_dest_paths = 0; /* SEE NOTE */
/* NOTE: This is currently disabled by default (with no way to
* enable it). That's because it's not particularly natural.
*
* Also there is a quite serious performance problem. When listing
* even moderately long directories, this takes many seconds. The
* reason is because it calls guestfs_is_dir on each directory
* entry, thus lots of round trips to the server. We could have
* a "readdir and stat each entry" call to ease this.
*/
char *
complete_dest_paths_generator (const char *text, int state)
{
#ifdef HAVE_LIBREADLINE
static int len, index;
static char **words = NULL;
static int nr_words = 0;
char *word;
guestfs_error_handler_cb old_error_cb;
void *old_error_cb_data;
/* Temporarily replace the error handler so that messages don't
* get printed to stderr while we are issuing commands.
*/
#define SAVE_ERROR_CB \
old_error_cb = guestfs_get_error_handler (g, &old_error_cb_data); \
guestfs_set_error_handler (g, NULL, NULL);
/* Restore error handler. */
#define RESTORE_ERROR_CB \
guestfs_set_error_handler (g, old_error_cb, old_error_cb_data);
if (!state) {
char **strs;
int i, n;
len = strlen (text);
index = 0;
if (words) {
/* NB. 'words' array is NOT NULL-terminated. */
for (i = 0; i < nr_words; ++i)
free (words[i]);
free (words);
}
words = NULL;
nr_words = 0;
SAVE_ERROR_CB
#define APPEND_STRS_AND_FREE \
if (strs) { \
n = count_strings (strs); \
words = realloc (words, sizeof (char *) * (nr_words + n)); \
for (i = 0; i < n; ++i) \
words[nr_words++] = strs[i]; \
free (strs); \
}
/* Is it a device? */
if (len < 5 || strncmp (text, "/dev/", 5) == 0) {
/* Get a list of everything that can possibly begin with /dev/ */
strs = guestfs_list_devices (g);
APPEND_STRS_AND_FREE
strs = guestfs_list_partitions (g);
APPEND_STRS_AND_FREE
strs = guestfs_lvs (g);
APPEND_STRS_AND_FREE
}
if (len < 1 || text[0] == '/') {
/* If we've got a partial path already, we need to list everything
* in that directory, otherwise list everything in /
*/
char *p, *dir;
p = strrchr (text, '/');
dir = p && p > text ? strndup (text, p - text) : strdup ("/");
strs = guestfs_ls (g, dir);
/* Prepend directory to names. */
if (strs) {
for (i = 0; strs[i]; ++i) {
p = NULL;
if (strcmp (dir, "/") == 0)
asprintf (&p, "/%s", strs[i]);
else
asprintf (&p, "%s/%s", dir, strs[i]);
free (strs[i]);
strs[i] = p;
}
}
free (dir);
APPEND_STRS_AND_FREE
}
/* else ... In theory we could complete other things here such as VG
* names. At the moment we don't do that.
*/
RESTORE_ERROR_CB
}
/* This inhibits ordinary (local filename) completion. */
rl_attempted_completion_over = 1;
/* Complete the string. */
while (index < nr_words) {
word = words[index];
index++;
if (strncasecmp (word, text, len) == 0) {
/* Is it a directory? */
if (strncmp (word, "/dev/", 5) != 0) {
SAVE_ERROR_CB
if (guestfs_is_dir (g, word) > 0)
rl_completion_append_character = '/';
RESTORE_ERROR_CB
}
return strdup (word);
}
}
#endif /* HAVE_LIBREADLINE */
return NULL;
}
|
