summaryrefslogtreecommitdiff
path: root/src/import/import.c
blob: e457adf6294f640f24d49ed296011ecddf621572 (plain)
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
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2014 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <getopt.h>

#include "sd-event.h"
#include "event-util.h"
#include "verbs.h"
#include "build.h"
#include "import-raw.h"
#include "import-dkr.h"

static bool arg_force = false;
static const char *arg_image_root = "/var/lib/machines";

static const char* arg_dkr_index_url = DEFAULT_DKR_INDEX_URL;

static void on_raw_finished(RawImport *import, int error, void *userdata) {
        sd_event *event = userdata;
        assert(import);

        if (error == 0)
                log_info("Operation completed successfully.");
        else
                log_info_errno(error, "Operation failed: %m");

        sd_event_exit(event, error);
}

static int pull_raw(int argc, char *argv[], void *userdata) {
        _cleanup_(raw_import_unrefp) RawImport *import = NULL;
        _cleanup_event_unref_ sd_event *event = NULL;
        const char *url, *local, *suffix;
        int r;

        url = argv[1];
        if (!raw_url_is_valid(url)) {
                log_error("URL '%s' is not valid.", url);
                return -EINVAL;
        }

        if (argc >= 3)
                local = argv[2];
        else {
                const char *e, *p;

                e = url + strlen(url);
                while (e > url && e[-1] == '/')
                        e--;

                p = e;
                while (p > url && p[-1] != '/')
                        p--;

                local = strndupa(p, e - p);
        }

        if (isempty(local) || streq(local, "-"))
                local = NULL;

        if (local) {
                const char *p;

                suffix = endswith(local, ".raw.xz");
                if (!suffix)
                        suffix = endswith(local, ".raw");
                if (!suffix)
                        suffix = endswith(local, ".xz");
                if (suffix)
                        local = strndupa(local, suffix - local);

                if (!machine_name_is_valid(local)) {
                        log_error("Local image name '%s' is not valid.", local);
                        return -EINVAL;
                }

                p = strappenda(arg_image_root, "/", local, ".raw");
                if (laccess(p, F_OK) >= 0) {
                        if (!arg_force) {
                                log_info("Image '%s' already exists.", local);
                                return 0;
                        }
                } else if (errno != ENOENT)
                        return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local);

                log_info("Pulling '%s', saving as '%s'.", url, local);
        } else
                log_info("Pulling '%s'.", url);

        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, SIGTERM, SIGINT, -1) == 0);
        sd_event_add_signal(event, NULL, SIGTERM, NULL,  NULL);
        sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);

        r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event);
        if (r < 0)
                return log_error_errno(r, "Failed to allocate importer: %m");

        r = raw_import_pull(import, url, local, arg_force);
        if (r < 0)
                return log_error_errno(r, "Failed to pull 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 0;
}

static void on_dkr_finished(DkrImport *import, int error, void *userdata) {
        sd_event *event = userdata;
        assert(import);

        if (error == 0)
                log_info("Operation completed successfully.");
        else
                log_info_errno(error, "Operation failed: %m");

        sd_event_exit(event, error);
}

static int pull_dkr(int argc, char *argv[], void *userdata) {
        _cleanup_(dkr_import_unrefp) DkrImport *import = NULL;
        _cleanup_event_unref_ sd_event *event = NULL;
        const char *name, *tag, *local;
        int r;

        if (!arg_dkr_index_url) {
                log_error("Please specify an index URL with --dkr-index-url=");
                return -EINVAL;
        }

        tag = strchr(argv[1], ':');
        if (tag) {
                name = strndupa(argv[1], tag - argv[1]);
                tag++;
        } else {
                name = argv[1];
                tag = "latest";
        }

        if (!dkr_name_is_valid(name)) {
                log_error("Remote name '%s' is not valid.", name);
                return -EINVAL;
        }

        if (!dkr_tag_is_valid(tag)) {
                log_error("Tag name '%s' is not valid.", tag);
                return -EINVAL;
        }

        if (argc >= 3)
                local = argv[2];
        else {
                local = strchr(name, '/');
                if (local)
                        local++;
                else
                        local = name;
        }

        if (isempty(local) || streq(local, "-"))
                local = NULL;

        if (local) {
                const char *p;

                if (!machine_name_is_valid(local)) {
                        log_error("Local image name '%s' is not valid.", local);
                        return -EINVAL;
                }

                p = strappenda(arg_image_root, "/", local);
                if (laccess(p, F_OK) >= 0) {
                        if (!arg_force) {
                                log_info("Image '%s' already exists.", local);
                                return 0;
                        }
                } else if (errno != ENOENT)
                        return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local);

                log_info("Pulling '%s' with tag '%s', saving as '%s'.", name, tag, local);
        } else
                log_info("Pulling '%s' with tag '%s'.", name, tag);

        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, SIGTERM, SIGINT, -1) == 0);
        sd_event_add_signal(event, NULL, SIGTERM, NULL,  NULL);
        sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);

        r = dkr_import_new(&import, event, arg_dkr_index_url, arg_image_root, on_dkr_finished, event);
        if (r < 0)
                return log_error_errno(r, "Failed to allocate importer: %m");

        r = dkr_import_pull(import, name, tag, local, arg_force);
        if (r < 0)
                return log_error_errno(r, "Failed to pull 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 0;
}

static int help(int argc, char *argv[], void *userdata) {

        printf("%s [OPTIONS...] {COMMAND} ...\n\n"
               "Import container or virtual machine image.\n\n"
               "  -h --help                   Show this help\n"
               "     --version                Show package version\n"
               "     --force                  Force creation of image\n"
               "     --image-root=            Image root directory\n"
               "     --dkr-index-url=URL      Specify index URL to use for downloads\n\n"
               "Commands:\n"
               "  pull-dkr REMOTE [NAME]      Download a DKR image\n"
               "  pull-raw URL [NAME]         Download a RAW image\n",
               program_invocation_short_name);

        return 0;
}

static int parse_argv(int argc, char *argv[]) {

        enum {
                ARG_VERSION = 0x100,
                ARG_FORCE,
                ARG_DKR_INDEX_URL,
                ARG_IMAGE_ROOT,
        };

        static const struct option options[] = {
                { "help",            no_argument,       NULL, 'h'                 },
                { "version",         no_argument,       NULL, ARG_VERSION         },
                { "force",           no_argument,       NULL, ARG_FORCE           },
                { "dkr-index-url",   required_argument, NULL, ARG_DKR_INDEX_URL   },
                { "image-root",      required_argument, NULL, ARG_IMAGE_ROOT      },
                {}
        };

        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:
                        puts(PACKAGE_STRING);
                        puts(SYSTEMD_FEATURES);
                        return 0;

                case ARG_FORCE:
                        arg_force = true;
                        break;

                case ARG_DKR_INDEX_URL:
                        if (!dkr_url_is_valid(optarg)) {
                                log_error("Index URL is not valid: %s", optarg);
                                return -EINVAL;
                        }

                        arg_dkr_index_url = optarg;
                        break;

                case ARG_IMAGE_ROOT:
                        arg_image_root = optarg;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        assert_not_reached("Unhandled option");
                }

        return 1;
}

static int import_main(int argc, char *argv[]) {

        static const Verb verbs[] = {
                { "help",     VERB_ANY, VERB_ANY, 0, help     },
                { "pull-dkr", 2,        3,        0, pull_dkr },
                { "pull-raw", 2,        3,        0, pull_raw },
                {}
        };

        return dispatch_verb(argc, argv, verbs, NULL);
}

int main(int argc, char *argv[]) {
        int r;

        setlocale(LC_ALL, "");
        log_parse_environment();
        log_open();

        r = parse_argv(argc, argv);
        if (r <= 0)
                goto finish;

        r = import_main(argc, argv);

finish:
        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}