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587fec42 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2015 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <getopt.h> | |
21 | ||
22 | #include "sd-event.h" | |
3f6fd1ba | 23 | |
b5efdb8a | 24 | #include "alloc-util.h" |
3f6fd1ba LP |
25 | #include "export-raw.h" |
26 | #include "export-tar.h" | |
3ffd4af2 | 27 | #include "fd-util.h" |
f4f15635 | 28 | #include "fs-util.h" |
25300b5a | 29 | #include "hostname-util.h" |
587fec42 | 30 | #include "import-util.h" |
3f6fd1ba LP |
31 | #include "machine-image.h" |
32 | #include "signal-util.h" | |
07630cea | 33 | #include "string-util.h" |
3f6fd1ba | 34 | #include "verbs.h" |
587fec42 LP |
35 | |
36 | static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN; | |
37 | ||
38 | static void determine_compression_from_filename(const char *p) { | |
39 | ||
40 | if (arg_compress != IMPORT_COMPRESS_UNKNOWN) | |
41 | return; | |
42 | ||
43 | if (!p) { | |
44 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
45 | return; | |
46 | } | |
47 | ||
48 | if (endswith(p, ".xz")) | |
49 | arg_compress = IMPORT_COMPRESS_XZ; | |
50 | else if (endswith(p, ".gz")) | |
51 | arg_compress = IMPORT_COMPRESS_GZIP; | |
52 | else if (endswith(p, ".bz2")) | |
53 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
54 | else | |
55 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
56 | } | |
57 | ||
58 | static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { | |
59 | log_notice("Transfer aborted."); | |
60 | sd_event_exit(sd_event_source_get_event(s), EINTR); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static void on_tar_finished(TarExport *export, int error, void *userdata) { | |
65 | sd_event *event = userdata; | |
66 | assert(export); | |
67 | ||
68 | if (error == 0) | |
69 | log_info("Operation completed successfully."); | |
70 | ||
71 | sd_event_exit(event, abs(error)); | |
72 | } | |
73 | ||
74 | static int export_tar(int argc, char *argv[], void *userdata) { | |
75 | _cleanup_(tar_export_unrefp) TarExport *export = NULL; | |
4afd3348 | 76 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; |
587fec42 LP |
77 | _cleanup_(image_unrefp) Image *image = NULL; |
78 | const char *path = NULL, *local = NULL; | |
79 | _cleanup_close_ int open_fd = -1; | |
80 | int r, fd; | |
81 | ||
82 | if (machine_name_is_valid(argv[1])) { | |
83 | r = image_find(argv[1], &image); | |
84 | if (r < 0) | |
85 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
86 | if (r == 0) { | |
87 | log_error("Machine image %s not found.", argv[1]); | |
88 | return -ENOENT; | |
89 | } | |
90 | ||
91 | local = image->path; | |
92 | } else | |
93 | local = argv[1]; | |
94 | ||
95 | if (argc >= 3) | |
96 | path = argv[2]; | |
97 | if (isempty(path) || streq(path, "-")) | |
98 | path = NULL; | |
99 | ||
100 | determine_compression_from_filename(path); | |
101 | ||
102 | if (path) { | |
103 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
104 | if (open_fd < 0) | |
105 | return log_error_errno(errno, "Failed to open tar image for export: %m"); | |
106 | ||
107 | fd = open_fd; | |
108 | ||
109 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
110 | } else { | |
111 | _cleanup_free_ char *pretty = NULL; | |
112 | ||
113 | fd = STDOUT_FILENO; | |
114 | ||
115 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
116 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
117 | } | |
118 | ||
119 | r = sd_event_default(&event); | |
120 | if (r < 0) | |
121 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
122 | ||
72c0a2c2 LP |
123 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
124 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
125 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
126 | |
127 | r = tar_export_new(&export, event, on_tar_finished, event); | |
128 | if (r < 0) | |
129 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
130 | ||
131 | r = tar_export_start(export, local, fd, arg_compress); | |
132 | if (r < 0) | |
133 | return log_error_errno(r, "Failed to export image: %m"); | |
134 | ||
135 | r = sd_event_loop(event); | |
136 | if (r < 0) | |
137 | return log_error_errno(r, "Failed to run event loop: %m"); | |
138 | ||
139 | log_info("Exiting."); | |
140 | return -r; | |
141 | } | |
142 | ||
143 | static void on_raw_finished(RawExport *export, int error, void *userdata) { | |
144 | sd_event *event = userdata; | |
145 | assert(export); | |
146 | ||
147 | if (error == 0) | |
148 | log_info("Operation completed successfully."); | |
149 | ||
150 | sd_event_exit(event, abs(error)); | |
151 | } | |
152 | ||
153 | static int export_raw(int argc, char *argv[], void *userdata) { | |
154 | _cleanup_(raw_export_unrefp) RawExport *export = NULL; | |
4afd3348 | 155 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; |
587fec42 LP |
156 | _cleanup_(image_unrefp) Image *image = NULL; |
157 | const char *path = NULL, *local = NULL; | |
158 | _cleanup_close_ int open_fd = -1; | |
159 | int r, fd; | |
160 | ||
161 | if (machine_name_is_valid(argv[1])) { | |
162 | r = image_find(argv[1], &image); | |
163 | if (r < 0) | |
164 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
165 | if (r == 0) { | |
166 | log_error("Machine image %s not found.", argv[1]); | |
167 | return -ENOENT; | |
168 | } | |
169 | ||
170 | local = image->path; | |
171 | } else | |
172 | local = argv[1]; | |
173 | ||
174 | if (argc >= 3) | |
175 | path = argv[2]; | |
176 | if (isempty(path) || streq(path, "-")) | |
177 | path = NULL; | |
178 | ||
179 | determine_compression_from_filename(path); | |
180 | ||
181 | if (path) { | |
182 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
183 | if (open_fd < 0) | |
184 | return log_error_errno(errno, "Failed to open raw image for export: %m"); | |
185 | ||
186 | fd = open_fd; | |
187 | ||
188 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
189 | } else { | |
190 | _cleanup_free_ char *pretty = NULL; | |
191 | ||
192 | fd = STDOUT_FILENO; | |
193 | ||
194 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
195 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
196 | } | |
197 | ||
198 | r = sd_event_default(&event); | |
199 | if (r < 0) | |
200 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
201 | ||
72c0a2c2 LP |
202 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
203 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
204 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
205 | |
206 | r = raw_export_new(&export, event, on_raw_finished, event); | |
207 | if (r < 0) | |
208 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
209 | ||
210 | r = raw_export_start(export, local, fd, arg_compress); | |
211 | if (r < 0) | |
212 | return log_error_errno(r, "Failed to export image: %m"); | |
213 | ||
214 | r = sd_event_loop(event); | |
215 | if (r < 0) | |
216 | return log_error_errno(r, "Failed to run event loop: %m"); | |
217 | ||
218 | log_info("Exiting."); | |
219 | return -r; | |
220 | } | |
221 | ||
222 | static int help(int argc, char *argv[], void *userdata) { | |
223 | ||
224 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" | |
225 | "Export container or virtual machine images.\n\n" | |
226 | " -h --help Show this help\n" | |
227 | " --version Show package version\n" | |
228 | " --format=FORMAT Select format\n\n" | |
229 | "Commands:\n" | |
230 | " tar NAME [FILE] Export a TAR image\n" | |
231 | " raw NAME [FILE] Export a RAW image\n", | |
232 | program_invocation_short_name); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int parse_argv(int argc, char *argv[]) { | |
238 | ||
239 | enum { | |
240 | ARG_VERSION = 0x100, | |
241 | ARG_FORMAT, | |
242 | }; | |
243 | ||
244 | static const struct option options[] = { | |
245 | { "help", no_argument, NULL, 'h' }, | |
246 | { "version", no_argument, NULL, ARG_VERSION }, | |
247 | { "format", required_argument, NULL, ARG_FORMAT }, | |
248 | {} | |
249 | }; | |
250 | ||
251 | int c; | |
252 | ||
253 | assert(argc >= 0); | |
254 | assert(argv); | |
255 | ||
256 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
257 | ||
258 | switch (c) { | |
259 | ||
260 | case 'h': | |
261 | return help(0, NULL, NULL); | |
262 | ||
263 | case ARG_VERSION: | |
3f6fd1ba | 264 | return version(); |
587fec42 LP |
265 | |
266 | case ARG_FORMAT: | |
267 | if (streq(optarg, "uncompressed")) | |
268 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
269 | else if (streq(optarg, "xz")) | |
270 | arg_compress = IMPORT_COMPRESS_XZ; | |
271 | else if (streq(optarg, "gzip")) | |
272 | arg_compress = IMPORT_COMPRESS_GZIP; | |
273 | else if (streq(optarg, "bzip2")) | |
274 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
275 | else { | |
276 | log_error("Unknown format: %s", optarg); | |
277 | return -EINVAL; | |
278 | } | |
279 | break; | |
280 | ||
281 | case '?': | |
282 | return -EINVAL; | |
283 | ||
284 | default: | |
285 | assert_not_reached("Unhandled option"); | |
286 | } | |
287 | ||
288 | return 1; | |
289 | } | |
290 | ||
291 | static int export_main(int argc, char *argv[]) { | |
292 | ||
293 | static const Verb verbs[] = { | |
294 | { "help", VERB_ANY, VERB_ANY, 0, help }, | |
295 | { "tar", 2, 3, 0, export_tar }, | |
296 | { "raw", 2, 3, 0, export_raw }, | |
297 | {} | |
298 | }; | |
299 | ||
300 | return dispatch_verb(argc, argv, verbs, NULL); | |
301 | } | |
302 | ||
303 | int main(int argc, char *argv[]) { | |
304 | int r; | |
305 | ||
306 | setlocale(LC_ALL, ""); | |
307 | log_parse_environment(); | |
308 | log_open(); | |
309 | ||
310 | r = parse_argv(argc, argv); | |
311 | if (r <= 0) | |
312 | goto finish; | |
313 | ||
ce30c8dc | 314 | (void) ignore_signals(SIGPIPE, -1); |
587fec42 LP |
315 | |
316 | r = export_main(argc, argv); | |
317 | ||
318 | finish: | |
319 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
320 | } |