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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
587fec42 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2015 Lennart Poettering | |
587fec42 LP |
6 | ***/ |
7 | ||
8 | #include <getopt.h> | |
9 | ||
10 | #include "sd-event.h" | |
dccca82b | 11 | #include "sd-id128.h" |
3f6fd1ba | 12 | |
b5efdb8a | 13 | #include "alloc-util.h" |
3f6fd1ba LP |
14 | #include "export-raw.h" |
15 | #include "export-tar.h" | |
3ffd4af2 | 16 | #include "fd-util.h" |
f4f15635 | 17 | #include "fs-util.h" |
25300b5a | 18 | #include "hostname-util.h" |
587fec42 | 19 | #include "import-util.h" |
3f6fd1ba LP |
20 | #include "machine-image.h" |
21 | #include "signal-util.h" | |
07630cea | 22 | #include "string-util.h" |
3f6fd1ba | 23 | #include "verbs.h" |
587fec42 LP |
24 | |
25 | static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN; | |
26 | ||
27 | static void determine_compression_from_filename(const char *p) { | |
28 | ||
29 | if (arg_compress != IMPORT_COMPRESS_UNKNOWN) | |
30 | return; | |
31 | ||
32 | if (!p) { | |
33 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
34 | return; | |
35 | } | |
36 | ||
37 | if (endswith(p, ".xz")) | |
38 | arg_compress = IMPORT_COMPRESS_XZ; | |
39 | else if (endswith(p, ".gz")) | |
40 | arg_compress = IMPORT_COMPRESS_GZIP; | |
41 | else if (endswith(p, ".bz2")) | |
42 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
43 | else | |
44 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
45 | } | |
46 | ||
47 | static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { | |
48 | log_notice("Transfer aborted."); | |
49 | sd_event_exit(sd_event_source_get_event(s), EINTR); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static void on_tar_finished(TarExport *export, int error, void *userdata) { | |
54 | sd_event *event = userdata; | |
55 | assert(export); | |
56 | ||
57 | if (error == 0) | |
58 | log_info("Operation completed successfully."); | |
59 | ||
60 | sd_event_exit(event, abs(error)); | |
61 | } | |
62 | ||
63 | static int export_tar(int argc, char *argv[], void *userdata) { | |
64 | _cleanup_(tar_export_unrefp) TarExport *export = NULL; | |
4afd3348 | 65 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; |
587fec42 LP |
66 | _cleanup_(image_unrefp) Image *image = NULL; |
67 | const char *path = NULL, *local = NULL; | |
68 | _cleanup_close_ int open_fd = -1; | |
69 | int r, fd; | |
70 | ||
71 | if (machine_name_is_valid(argv[1])) { | |
5ef46e5f | 72 | r = image_find(IMAGE_MACHINE, argv[1], &image); |
3a6ce860 LP |
73 | if (r == -ENOENT) |
74 | return log_error_errno(r, "Machine image %s not found.", argv[1]); | |
587fec42 LP |
75 | if (r < 0) |
76 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
587fec42 LP |
77 | |
78 | local = image->path; | |
79 | } else | |
80 | local = argv[1]; | |
81 | ||
82 | if (argc >= 3) | |
83 | path = argv[2]; | |
84 | if (isempty(path) || streq(path, "-")) | |
85 | path = NULL; | |
86 | ||
87 | determine_compression_from_filename(path); | |
88 | ||
89 | if (path) { | |
90 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
91 | if (open_fd < 0) | |
92 | return log_error_errno(errno, "Failed to open tar image for export: %m"); | |
93 | ||
94 | fd = open_fd; | |
95 | ||
96 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
97 | } else { | |
98 | _cleanup_free_ char *pretty = NULL; | |
99 | ||
100 | fd = STDOUT_FILENO; | |
101 | ||
102 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
103 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
104 | } | |
105 | ||
106 | r = sd_event_default(&event); | |
107 | if (r < 0) | |
108 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
109 | ||
72c0a2c2 LP |
110 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
111 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
112 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
113 | |
114 | r = tar_export_new(&export, event, on_tar_finished, event); | |
115 | if (r < 0) | |
116 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
117 | ||
118 | r = tar_export_start(export, local, fd, arg_compress); | |
119 | if (r < 0) | |
120 | return log_error_errno(r, "Failed to export image: %m"); | |
121 | ||
122 | r = sd_event_loop(event); | |
123 | if (r < 0) | |
124 | return log_error_errno(r, "Failed to run event loop: %m"); | |
125 | ||
126 | log_info("Exiting."); | |
127 | return -r; | |
128 | } | |
129 | ||
130 | static void on_raw_finished(RawExport *export, int error, void *userdata) { | |
131 | sd_event *event = userdata; | |
132 | assert(export); | |
133 | ||
134 | if (error == 0) | |
135 | log_info("Operation completed successfully."); | |
136 | ||
137 | sd_event_exit(event, abs(error)); | |
138 | } | |
139 | ||
140 | static int export_raw(int argc, char *argv[], void *userdata) { | |
141 | _cleanup_(raw_export_unrefp) RawExport *export = NULL; | |
4afd3348 | 142 | _cleanup_(sd_event_unrefp) sd_event *event = NULL; |
587fec42 LP |
143 | _cleanup_(image_unrefp) Image *image = NULL; |
144 | const char *path = NULL, *local = NULL; | |
145 | _cleanup_close_ int open_fd = -1; | |
146 | int r, fd; | |
147 | ||
148 | if (machine_name_is_valid(argv[1])) { | |
5ef46e5f | 149 | r = image_find(IMAGE_MACHINE, argv[1], &image); |
3a6ce860 LP |
150 | if (r == -ENOENT) |
151 | return log_error_errno(r, "Machine image %s not found.", argv[1]); | |
587fec42 LP |
152 | if (r < 0) |
153 | return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]); | |
587fec42 LP |
154 | |
155 | local = image->path; | |
156 | } else | |
157 | local = argv[1]; | |
158 | ||
159 | if (argc >= 3) | |
160 | path = argv[2]; | |
161 | if (isempty(path) || streq(path, "-")) | |
162 | path = NULL; | |
163 | ||
164 | determine_compression_from_filename(path); | |
165 | ||
166 | if (path) { | |
167 | open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666); | |
168 | if (open_fd < 0) | |
169 | return log_error_errno(errno, "Failed to open raw image for export: %m"); | |
170 | ||
171 | fd = open_fd; | |
172 | ||
173 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress)); | |
174 | } else { | |
175 | _cleanup_free_ char *pretty = NULL; | |
176 | ||
177 | fd = STDOUT_FILENO; | |
178 | ||
179 | (void) readlink_malloc("/proc/self/fd/1", &pretty); | |
180 | log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress)); | |
181 | } | |
182 | ||
183 | r = sd_event_default(&event); | |
184 | if (r < 0) | |
185 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
186 | ||
72c0a2c2 LP |
187 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
188 | (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); | |
189 | (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); | |
587fec42 LP |
190 | |
191 | r = raw_export_new(&export, event, on_raw_finished, event); | |
192 | if (r < 0) | |
193 | return log_error_errno(r, "Failed to allocate exporter: %m"); | |
194 | ||
195 | r = raw_export_start(export, local, fd, arg_compress); | |
196 | if (r < 0) | |
197 | return log_error_errno(r, "Failed to export image: %m"); | |
198 | ||
199 | r = sd_event_loop(event); | |
200 | if (r < 0) | |
201 | return log_error_errno(r, "Failed to run event loop: %m"); | |
202 | ||
203 | log_info("Exiting."); | |
204 | return -r; | |
205 | } | |
206 | ||
207 | static int help(int argc, char *argv[], void *userdata) { | |
208 | ||
209 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" | |
210 | "Export container or virtual machine images.\n\n" | |
211 | " -h --help Show this help\n" | |
212 | " --version Show package version\n" | |
213 | " --format=FORMAT Select format\n\n" | |
214 | "Commands:\n" | |
215 | " tar NAME [FILE] Export a TAR image\n" | |
216 | " raw NAME [FILE] Export a RAW image\n", | |
217 | program_invocation_short_name); | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int parse_argv(int argc, char *argv[]) { | |
223 | ||
224 | enum { | |
225 | ARG_VERSION = 0x100, | |
226 | ARG_FORMAT, | |
227 | }; | |
228 | ||
229 | static const struct option options[] = { | |
230 | { "help", no_argument, NULL, 'h' }, | |
231 | { "version", no_argument, NULL, ARG_VERSION }, | |
232 | { "format", required_argument, NULL, ARG_FORMAT }, | |
233 | {} | |
234 | }; | |
235 | ||
236 | int c; | |
237 | ||
238 | assert(argc >= 0); | |
239 | assert(argv); | |
240 | ||
241 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
242 | ||
243 | switch (c) { | |
244 | ||
245 | case 'h': | |
246 | return help(0, NULL, NULL); | |
247 | ||
248 | case ARG_VERSION: | |
3f6fd1ba | 249 | return version(); |
587fec42 LP |
250 | |
251 | case ARG_FORMAT: | |
252 | if (streq(optarg, "uncompressed")) | |
253 | arg_compress = IMPORT_COMPRESS_UNCOMPRESSED; | |
254 | else if (streq(optarg, "xz")) | |
255 | arg_compress = IMPORT_COMPRESS_XZ; | |
256 | else if (streq(optarg, "gzip")) | |
257 | arg_compress = IMPORT_COMPRESS_GZIP; | |
258 | else if (streq(optarg, "bzip2")) | |
259 | arg_compress = IMPORT_COMPRESS_BZIP2; | |
260 | else { | |
261 | log_error("Unknown format: %s", optarg); | |
262 | return -EINVAL; | |
263 | } | |
264 | break; | |
265 | ||
266 | case '?': | |
267 | return -EINVAL; | |
268 | ||
269 | default: | |
270 | assert_not_reached("Unhandled option"); | |
271 | } | |
272 | ||
273 | return 1; | |
274 | } | |
275 | ||
276 | static int export_main(int argc, char *argv[]) { | |
277 | ||
278 | static const Verb verbs[] = { | |
279 | { "help", VERB_ANY, VERB_ANY, 0, help }, | |
280 | { "tar", 2, 3, 0, export_tar }, | |
281 | { "raw", 2, 3, 0, export_raw }, | |
282 | {} | |
283 | }; | |
284 | ||
285 | return dispatch_verb(argc, argv, verbs, NULL); | |
286 | } | |
287 | ||
288 | int main(int argc, char *argv[]) { | |
289 | int r; | |
290 | ||
291 | setlocale(LC_ALL, ""); | |
292 | log_parse_environment(); | |
293 | log_open(); | |
294 | ||
295 | r = parse_argv(argc, argv); | |
296 | if (r <= 0) | |
297 | goto finish; | |
298 | ||
ce30c8dc | 299 | (void) ignore_signals(SIGPIPE, -1); |
587fec42 LP |
300 | |
301 | r = export_main(argc, argv); | |
302 | ||
303 | finish: | |
304 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
305 | } |