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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <locale.h>
#include "sd-event.h"
#include "sd-id128.h"
#include "alloc-util.h"
#include "build.h"
#include "discover-image.h"
#include "export-raw.h"
#include "export-tar.h"
#include "fd-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "import-util.h"
#include "main-func.h"
#include "signal-util.h"
#include "string-util.h"
#include "terminal-util.h"
#include "verbs.h"
static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
static void determine_compression_from_filename(const char *p) {
if (arg_compress != IMPORT_COMPRESS_UNKNOWN)
return;
if (!p) {
arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
return;
}
if (endswith(p, ".xz"))
arg_compress = IMPORT_COMPRESS_XZ;
else if (endswith(p, ".gz"))
arg_compress = IMPORT_COMPRESS_GZIP;
else if (endswith(p, ".bz2"))
arg_compress = IMPORT_COMPRESS_BZIP2;
else
arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
}
static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
log_notice("Transfer aborted.");
sd_event_exit(sd_event_source_get_event(s), EINTR);
return 0;
}
static void on_tar_finished(TarExport *export, int error, void *userdata) {
sd_event *event = userdata;
assert(export);
if (error == 0)
log_info("Operation completed successfully.");
sd_event_exit(event, abs(error));
}
static int export_tar(int argc, char *argv[], void *userdata) {
_cleanup_(tar_export_unrefp) TarExport *export = NULL;
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
_cleanup_(image_unrefp) Image *image = NULL;
const char *path = NULL, *local = NULL;
_cleanup_close_ int open_fd = -EBADF;
int r, fd;
if (hostname_is_valid(argv[1], 0)) {
r = image_find(IMAGE_MACHINE, argv[1], NULL, &image);
if (r == -ENOENT)
return log_error_errno(r, "Machine image %s not found.", argv[1]);
if (r < 0)
return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
local = image->path;
} else
local = argv[1];
if (argc >= 3)
path = argv[2];
path = empty_or_dash_to_null(path);
determine_compression_from_filename(path);
if (path) {
open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
if (open_fd < 0)
return log_error_errno(errno, "Failed to open tar image for export: %m");
fd = open_fd;
log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
} else {
_cleanup_free_ char *pretty = NULL;
fd = STDOUT_FILENO;
(void) fd_get_path(fd, &pretty);
log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
}
r = sd_event_default(&event);
if (r < 0)
return log_error_errno(r, "Failed to allocate event loop: %m");
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
r = tar_export_new(&export, event, on_tar_finished, event);
if (r < 0)
return log_error_errno(r, "Failed to allocate exporter: %m");
r = tar_export_start(export, local, fd, arg_compress);
if (r < 0)
return log_error_errno(r, "Failed to export image: %m");
r = sd_event_loop(event);
if (r < 0)
return log_error_errno(r, "Failed to run event loop: %m");
log_info("Exiting.");
return -r;
}
static void on_raw_finished(RawExport *export, int error, void *userdata) {
sd_event *event = userdata;
assert(export);
if (error == 0)
log_info("Operation completed successfully.");
sd_event_exit(event, abs(error));
}
static int export_raw(int argc, char *argv[], void *userdata) {
_cleanup_(raw_export_unrefp) RawExport *export = NULL;
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
_cleanup_(image_unrefp) Image *image = NULL;
const char *path = NULL, *local = NULL;
_cleanup_close_ int open_fd = -EBADF;
int r, fd;
if (hostname_is_valid(argv[1], 0)) {
r = image_find(IMAGE_MACHINE, argv[1], NULL, &image);
if (r == -ENOENT)
return log_error_errno(r, "Machine image %s not found.", argv[1]);
if (r < 0)
return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
local = image->path;
} else
local = argv[1];
if (argc >= 3)
path = argv[2];
path = empty_or_dash_to_null(path);
determine_compression_from_filename(path);
if (path) {
open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
if (open_fd < 0)
return log_error_errno(errno, "Failed to open raw image for export: %m");
fd = open_fd;
log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
} else {
_cleanup_free_ char *pretty = NULL;
fd = STDOUT_FILENO;
(void) fd_get_path(fd, &pretty);
log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
}
r = sd_event_default(&event);
if (r < 0)
return log_error_errno(r, "Failed to allocate event loop: %m");
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
r = raw_export_new(&export, event, on_raw_finished, event);
if (r < 0)
return log_error_errno(r, "Failed to allocate exporter: %m");
r = raw_export_start(export, local, fd, arg_compress);
if (r < 0)
return log_error_errno(r, "Failed to export image: %m");
r = sd_event_loop(event);
if (r < 0)
return log_error_errno(r, "Failed to run event loop: %m");
log_info("Exiting.");
return -r;
}
static int help(int argc, char *argv[], void *userdata) {
printf("%1$s [OPTIONS...] {COMMAND} ...\n"
"\n%4$sExport container or virtual machine images.%5$s\n"
"\n%2$sCommands:%3$s\n"
" tar NAME [FILE] Export a TAR image\n"
" raw NAME [FILE] Export a RAW image\n"
"\n%2$sOptions:%3$s\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --format=FORMAT Select format\n\n",
program_invocation_short_name,
ansi_underline(),
ansi_normal(),
ansi_highlight(),
ansi_normal());
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_FORMAT,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "format", required_argument, NULL, ARG_FORMAT },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
return help(0, NULL, NULL);
case ARG_VERSION:
return version();
case ARG_FORMAT:
if (streq(optarg, "uncompressed"))
arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
else if (streq(optarg, "xz"))
arg_compress = IMPORT_COMPRESS_XZ;
else if (streq(optarg, "gzip"))
arg_compress = IMPORT_COMPRESS_GZIP;
else if (streq(optarg, "bzip2"))
arg_compress = IMPORT_COMPRESS_BZIP2;
else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown format: %s", optarg);
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
return 1;
}
static int export_main(int argc, char *argv[]) {
static const Verb verbs[] = {
{ "help", VERB_ANY, VERB_ANY, 0, help },
{ "tar", 2, 3, 0, export_tar },
{ "raw", 2, 3, 0, export_raw },
{}
};
return dispatch_verb(argc, argv, verbs, NULL);
}
static int run(int argc, char *argv[]) {
int r;
setlocale(LC_ALL, "");
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
(void) ignore_signals(SIGPIPE);
return export_main(argc, argv);
}
DEFINE_MAIN_FUNCTION(run);
|
