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587fec42 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2015 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <getopt.h> | |
23 | ||
24 | #include "sd-event.h" | |
3f6fd1ba | 25 | |
587fec42 | 26 | #include "event-util.h" |
3f6fd1ba LP |
27 | #include "export-raw.h" |
28 | #include "export-tar.h" | |
3ffd4af2 | 29 | #include "fd-util.h" |
f4f15635 | 30 | #include "fs-util.h" |
25300b5a | 31 | #include "hostname-util.h" |
587fec42 | 32 | #include "import-util.h" |
3f6fd1ba LP |
33 | #include "machine-image.h" |
34 | #include "signal-util.h" | |
07630cea | 35 | #include "string-util.h" |
3f6fd1ba | 36 | #include "verbs.h" |
587fec42 LP |
37 | |
38 | static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN; | |
39 | ||
40 | static void determine_compression_from_filename(const char *p) { | |
41 | ||
42 | if (arg_compress != IMPORT_COMPRESS_UNKNOWN) | |
43 | return; | |
44 | ||
45 | if (!p) { | |
46 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
47 | return; | |
48 | } | |
49 | ||
50 | if (endswith(p, ".xz")) | |
51 | arg_compress = IMPORT_COMPRESS_XZ; | |
52 | else if (endswith(p, ".gz")) | |
53 | arg_compress = IMPORT_COMPRESS_GZIP; | |
54 | else if (endswith(p, ".bz2")) | |
55 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
56 | else | |
57 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
58 | } | |
59 | ||
60 | static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { | |
61 | log_notice("Transfer aborted."); | |
62 | sd_event_exit(sd_event_source_get_event(s), EINTR); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static void on_tar_finished(TarExport *export, int error, void *userdata) { | |
67 | sd_event *event = userdata; | |
68 | assert(export); | |
69 | ||
70 | if (error == 0) | |
71 | log_info("Operation completed successfully."); | |
72 | ||
73 | sd_event_exit(event, abs(error)); | |
74 | } | |
75 | ||
76 | static int export_tar(int argc, char *argv[], void *userdata) { | |
77 | _cleanup_(tar_export_unrefp) TarExport *export = NULL; | |
78 | _cleanup_event_unref_ sd_event *event = NULL; | |
79 | _cleanup_(image_unrefp) Image *image = NULL; | |
80 | const char *path = NULL, *local = NULL; | |
81 | _cleanup_close_ int open_fd = -1; | |
82 | int r, fd; | |
83 | ||
84 | if (machine_name_is_valid(argv[1])) { | |
85 | r = image_find(argv[1], &image); | |
86 | if (r < 0) | |
87 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
88 | if (r == 0) { | |
89 | log_error("Machine image %s not found.", argv[1]); | |
90 | return -ENOENT; | |
91 | } | |
92 | ||
93 | local = image->path; | |
94 | } else | |
95 | local = argv[1]; | |
96 | ||
97 | if (argc >= 3) | |
98 | path = argv[2]; | |
99 | if (isempty(path) || streq(path, "-")) | |
100 | path = NULL; | |
101 | ||
102 | determine_compression_from_filename(path); | |
103 | ||
104 | if (path) { | |
105 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
106 | if (open_fd < 0) | |
107 | return log_error_errno(errno, "Failed to open tar image for export: %m"); | |
108 | ||
109 | fd = open_fd; | |
110 | ||
111 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
112 | } else { | |
113 | _cleanup_free_ char *pretty = NULL; | |
114 | ||
115 | fd = STDOUT_FILENO; | |
116 | ||
117 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
118 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
119 | } | |
120 | ||
121 | r = sd_event_default(&event); | |
122 | if (r < 0) | |
123 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
124 | ||
72c0a2c2 LP |
125 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
126 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
127 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
128 | |
129 | r = tar_export_new(&export, event, on_tar_finished, event); | |
130 | if (r < 0) | |
131 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
132 | ||
133 | r = tar_export_start(export, local, fd, arg_compress); | |
134 | if (r < 0) | |
135 | return log_error_errno(r, "Failed to export image: %m"); | |
136 | ||
137 | r = sd_event_loop(event); | |
138 | if (r < 0) | |
139 | return log_error_errno(r, "Failed to run event loop: %m"); | |
140 | ||
141 | log_info("Exiting."); | |
142 | return -r; | |
143 | } | |
144 | ||
145 | static void on_raw_finished(RawExport *export, int error, void *userdata) { | |
146 | sd_event *event = userdata; | |
147 | assert(export); | |
148 | ||
149 | if (error == 0) | |
150 | log_info("Operation completed successfully."); | |
151 | ||
152 | sd_event_exit(event, abs(error)); | |
153 | } | |
154 | ||
155 | static int export_raw(int argc, char *argv[], void *userdata) { | |
156 | _cleanup_(raw_export_unrefp) RawExport *export = NULL; | |
157 | _cleanup_event_unref_ sd_event *event = NULL; | |
158 | _cleanup_(image_unrefp) Image *image = NULL; | |
159 | const char *path = NULL, *local = NULL; | |
160 | _cleanup_close_ int open_fd = -1; | |
161 | int r, fd; | |
162 | ||
163 | if (machine_name_is_valid(argv[1])) { | |
164 | r = image_find(argv[1], &image); | |
165 | if (r < 0) | |
166 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
167 | if (r == 0) { | |
168 | log_error("Machine image %s not found.", argv[1]); | |
169 | return -ENOENT; | |
170 | } | |
171 | ||
172 | local = image->path; | |
173 | } else | |
174 | local = argv[1]; | |
175 | ||
176 | if (argc >= 3) | |
177 | path = argv[2]; | |
178 | if (isempty(path) || streq(path, "-")) | |
179 | path = NULL; | |
180 | ||
181 | determine_compression_from_filename(path); | |
182 | ||
183 | if (path) { | |
184 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
185 | if (open_fd < 0) | |
186 | return log_error_errno(errno, "Failed to open raw image for export: %m"); | |
187 | ||
188 | fd = open_fd; | |
189 | ||
190 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
191 | } else { | |
192 | _cleanup_free_ char *pretty = NULL; | |
193 | ||
194 | fd = STDOUT_FILENO; | |
195 | ||
196 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
197 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
198 | } | |
199 | ||
200 | r = sd_event_default(&event); | |
201 | if (r < 0) | |
202 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
203 | ||
72c0a2c2 LP |
204 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
205 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
206 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
207 | |
208 | r = raw_export_new(&export, event, on_raw_finished, event); | |
209 | if (r < 0) | |
210 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
211 | ||
212 | r = raw_export_start(export, local, fd, arg_compress); | |
213 | if (r < 0) | |
214 | return log_error_errno(r, "Failed to export image: %m"); | |
215 | ||
216 | r = sd_event_loop(event); | |
217 | if (r < 0) | |
218 | return log_error_errno(r, "Failed to run event loop: %m"); | |
219 | ||
220 | log_info("Exiting."); | |
221 | return -r; | |
222 | } | |
223 | ||
224 | static int help(int argc, char *argv[], void *userdata) { | |
225 | ||
226 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" | |
227 | "Export container or virtual machine images.\n\n" | |
228 | " -h --help Show this help\n" | |
229 | " --version Show package version\n" | |
230 | " --format=FORMAT Select format\n\n" | |
231 | "Commands:\n" | |
232 | " tar NAME [FILE] Export a TAR image\n" | |
233 | " raw NAME [FILE] Export a RAW image\n", | |
234 | program_invocation_short_name); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static int parse_argv(int argc, char *argv[]) { | |
240 | ||
241 | enum { | |
242 | ARG_VERSION = 0x100, | |
243 | ARG_FORMAT, | |
244 | }; | |
245 | ||
246 | static const struct option options[] = { | |
247 | { "help", no_argument, NULL, 'h' }, | |
248 | { "version", no_argument, NULL, ARG_VERSION }, | |
249 | { "format", required_argument, NULL, ARG_FORMAT }, | |
250 | {} | |
251 | }; | |
252 | ||
253 | int c; | |
254 | ||
255 | assert(argc >= 0); | |
256 | assert(argv); | |
257 | ||
258 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
259 | ||
260 | switch (c) { | |
261 | ||
262 | case 'h': | |
263 | return help(0, NULL, NULL); | |
264 | ||
265 | case ARG_VERSION: | |
3f6fd1ba | 266 | return version(); |
587fec42 LP |
267 | |
268 | case ARG_FORMAT: | |
269 | if (streq(optarg, "uncompressed")) | |
270 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
271 | else if (streq(optarg, "xz")) | |
272 | arg_compress = IMPORT_COMPRESS_XZ; | |
273 | else if (streq(optarg, "gzip")) | |
274 | arg_compress = IMPORT_COMPRESS_GZIP; | |
275 | else if (streq(optarg, "bzip2")) | |
276 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
277 | else { | |
278 | log_error("Unknown format: %s", optarg); | |
279 | return -EINVAL; | |
280 | } | |
281 | break; | |
282 | ||
283 | case '?': | |
284 | return -EINVAL; | |
285 | ||
286 | default: | |
287 | assert_not_reached("Unhandled option"); | |
288 | } | |
289 | ||
290 | return 1; | |
291 | } | |
292 | ||
293 | static int export_main(int argc, char *argv[]) { | |
294 | ||
295 | static const Verb verbs[] = { | |
296 | { "help", VERB_ANY, VERB_ANY, 0, help }, | |
297 | { "tar", 2, 3, 0, export_tar }, | |
298 | { "raw", 2, 3, 0, export_raw }, | |
299 | {} | |
300 | }; | |
301 | ||
302 | return dispatch_verb(argc, argv, verbs, NULL); | |
303 | } | |
304 | ||
305 | int main(int argc, char *argv[]) { | |
306 | int r; | |
307 | ||
308 | setlocale(LC_ALL, ""); | |
309 | log_parse_environment(); | |
310 | log_open(); | |
311 | ||
312 | r = parse_argv(argc, argv); | |
313 | if (r <= 0) | |
314 | goto finish; | |
315 | ||
ce30c8dc | 316 | (void) ignore_signals(SIGPIPE, -1); |
587fec42 LP |
317 | |
318 | r = export_main(argc, argv); | |
319 | ||
320 | finish: | |
321 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
322 | } |