1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2015 Lennart Poettering
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.
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.
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/>.
25 #include "event-util.h"
26 #include "signal-util.h"
29 #include "machine-image.h"
30 #include "import-util.h"
31 #include "export-tar.h"
32 #include "export-raw.h"
34 static ImportCompressType arg_compress
= IMPORT_COMPRESS_UNKNOWN
;
36 static void determine_compression_from_filename(const char *p
) {
38 if (arg_compress
!= IMPORT_COMPRESS_UNKNOWN
)
42 arg_compress
= IMPORT_COMPRESS_UNCOMPRESSED
;
46 if (endswith(p
, ".xz"))
47 arg_compress
= IMPORT_COMPRESS_XZ
;
48 else if (endswith(p
, ".gz"))
49 arg_compress
= IMPORT_COMPRESS_GZIP
;
50 else if (endswith(p
, ".bz2"))
51 arg_compress
= IMPORT_COMPRESS_BZIP2
;
53 arg_compress
= IMPORT_COMPRESS_UNCOMPRESSED
;
56 static int interrupt_signal_handler(sd_event_source
*s
, const struct signalfd_siginfo
*si
, void *userdata
) {
57 log_notice("Transfer aborted.");
58 sd_event_exit(sd_event_source_get_event(s
), EINTR
);
62 static void on_tar_finished(TarExport
*export
, int error
, void *userdata
) {
63 sd_event
*event
= userdata
;
67 log_info("Operation completed successfully.");
69 sd_event_exit(event
, abs(error
));
72 static int export_tar(int argc
, char *argv
[], void *userdata
) {
73 _cleanup_(tar_export_unrefp
) TarExport
*export
= NULL
;
74 _cleanup_event_unref_ sd_event
*event
= NULL
;
75 _cleanup_(image_unrefp
) Image
*image
= NULL
;
76 const char *path
= NULL
, *local
= NULL
;
77 _cleanup_close_
int open_fd
= -1;
80 if (machine_name_is_valid(argv
[1])) {
81 r
= image_find(argv
[1], &image
);
83 return log_error_errno(r
, "Failed to look for machine %s: %m", argv
[1]);
85 log_error("Machine image %s not found.", argv
[1]);
95 if (isempty(path
) || streq(path
, "-"))
98 determine_compression_from_filename(path
);
101 open_fd
= open(path
, O_WRONLY
|O_CREAT
|O_TRUNC
|O_CLOEXEC
|O_NOCTTY
, 0666);
103 return log_error_errno(errno
, "Failed to open tar image for export: %m");
107 log_info("Exporting '%s', saving to '%s' with compression '%s'.", local
, path
, import_compress_type_to_string(arg_compress
));
109 _cleanup_free_
char *pretty
= NULL
;
113 (void) readlink_malloc("/proc/self/fd/1", &pretty
);
114 log_info("Exporting '%s', saving to '%s' with compression '%s'.", local
, strna(pretty
), import_compress_type_to_string(arg_compress
));
117 r
= sd_event_default(&event
);
119 return log_error_errno(r
, "Failed to allocate event loop: %m");
121 assert_se(sigprocmask_many(SIG_BLOCK
, SIGTERM
, SIGINT
, -1) == 0);
122 sd_event_add_signal(event
, NULL
, SIGTERM
, interrupt_signal_handler
, NULL
);
123 sd_event_add_signal(event
, NULL
, SIGINT
, interrupt_signal_handler
, NULL
);
125 r
= tar_export_new(&export
, event
, on_tar_finished
, event
);
127 return log_error_errno(r
, "Failed to allocate exporter: %m");
129 r
= tar_export_start(export
, local
, fd
, arg_compress
);
131 return log_error_errno(r
, "Failed to export image: %m");
133 r
= sd_event_loop(event
);
135 return log_error_errno(r
, "Failed to run event loop: %m");
137 log_info("Exiting.");
141 static void on_raw_finished(RawExport
*export
, int error
, void *userdata
) {
142 sd_event
*event
= userdata
;
146 log_info("Operation completed successfully.");
148 sd_event_exit(event
, abs(error
));
151 static int export_raw(int argc
, char *argv
[], void *userdata
) {
152 _cleanup_(raw_export_unrefp
) RawExport
*export
= NULL
;
153 _cleanup_event_unref_ sd_event
*event
= NULL
;
154 _cleanup_(image_unrefp
) Image
*image
= NULL
;
155 const char *path
= NULL
, *local
= NULL
;
156 _cleanup_close_
int open_fd
= -1;
159 if (machine_name_is_valid(argv
[1])) {
160 r
= image_find(argv
[1], &image
);
162 return log_error_errno(r
, "Failed to look for machine %s: %m", argv
[1]);
164 log_error("Machine image %s not found.", argv
[1]);
174 if (isempty(path
) || streq(path
, "-"))
177 determine_compression_from_filename(path
);
180 open_fd
= open(path
, O_WRONLY
|O_CREAT
|O_TRUNC
|O_CLOEXEC
|O_NOCTTY
, 0666);
182 return log_error_errno(errno
, "Failed to open raw image for export: %m");
186 log_info("Exporting '%s', saving to '%s' with compression '%s'.", local
, path
, import_compress_type_to_string(arg_compress
));
188 _cleanup_free_
char *pretty
= NULL
;
192 (void) readlink_malloc("/proc/self/fd/1", &pretty
);
193 log_info("Exporting '%s', saving to '%s' with compression '%s'.", local
, strna(pretty
), import_compress_type_to_string(arg_compress
));
196 r
= sd_event_default(&event
);
198 return log_error_errno(r
, "Failed to allocate event loop: %m");
200 assert_se(sigprocmask_many(SIG_BLOCK
, SIGTERM
, SIGINT
, -1) == 0);
201 sd_event_add_signal(event
, NULL
, SIGTERM
, interrupt_signal_handler
, NULL
);
202 sd_event_add_signal(event
, NULL
, SIGINT
, interrupt_signal_handler
, NULL
);
204 r
= raw_export_new(&export
, event
, on_raw_finished
, event
);
206 return log_error_errno(r
, "Failed to allocate exporter: %m");
208 r
= raw_export_start(export
, local
, fd
, arg_compress
);
210 return log_error_errno(r
, "Failed to export image: %m");
212 r
= sd_event_loop(event
);
214 return log_error_errno(r
, "Failed to run event loop: %m");
216 log_info("Exiting.");
220 static int help(int argc
, char *argv
[], void *userdata
) {
222 printf("%s [OPTIONS...] {COMMAND} ...\n\n"
223 "Export container or virtual machine images.\n\n"
224 " -h --help Show this help\n"
225 " --version Show package version\n"
226 " --format=FORMAT Select format\n\n"
228 " tar NAME [FILE] Export a TAR image\n"
229 " raw NAME [FILE] Export a RAW image\n",
230 program_invocation_short_name
);
235 static int parse_argv(int argc
, char *argv
[]) {
242 static const struct option options
[] = {
243 { "help", no_argument
, NULL
, 'h' },
244 { "version", no_argument
, NULL
, ARG_VERSION
},
245 { "format", required_argument
, NULL
, ARG_FORMAT
},
254 while ((c
= getopt_long(argc
, argv
, "h", options
, NULL
)) >= 0)
259 return help(0, NULL
, NULL
);
262 puts(PACKAGE_STRING
);
263 puts(SYSTEMD_FEATURES
);
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
;
276 log_error("Unknown format: %s", optarg
);
285 assert_not_reached("Unhandled option");
291 static int export_main(int argc
, char *argv
[]) {
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
},
300 return dispatch_verb(argc
, argv
, verbs
, NULL
);
303 int main(int argc
, char *argv
[]) {
306 setlocale(LC_ALL
, "");
307 log_parse_environment();
310 r
= parse_argv(argc
, argv
);
314 (void) ignore_signals(SIGPIPE
, -1);
316 r
= export_main(argc
, argv
);
319 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;