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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 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" | |
25 | #include "event-util.h" | |
26 | #include "verbs.h" | |
27 | #include "build.h" | |
28 | #include "import-dck.h" | |
29 | ||
30 | static bool arg_force = false; | |
31 | ||
32 | static void on_finished(DckImport *import, int error, void *userdata) { | |
33 | sd_event *event = userdata; | |
34 | assert(import); | |
35 | ||
36 | if (error == 0) | |
37 | log_info("Operation completed successfully."); | |
38 | else | |
39 | log_info_errno(error, "Operation failed: %m"); | |
40 | ||
41 | sd_event_exit(event, error); | |
42 | } | |
43 | ||
44 | static int pull_dck(int argc, char *argv[], void *userdata) { | |
45 | _cleanup_(dck_import_unrefp) DckImport *import = NULL; | |
46 | _cleanup_event_unref_ sd_event *event = NULL; | |
47 | const char *name, *tag, *local; | |
48 | int r; | |
49 | ||
50 | tag = strchr(argv[1], ':'); | |
51 | if (tag) { | |
52 | name = strndupa(argv[1], tag - argv[1]); | |
53 | tag++; | |
54 | } else { | |
55 | name = argv[1]; | |
56 | tag = "latest"; | |
57 | } | |
58 | ||
59 | if (argc >= 3) | |
60 | local = argv[2]; | |
61 | else { | |
62 | local = strchr(name, '/'); | |
63 | if (local) | |
64 | local++; | |
65 | else | |
66 | local = name; | |
67 | } | |
68 | ||
69 | if (streq(local, "-") || isempty(local)) | |
70 | local = NULL; | |
71 | ||
72 | if (!dck_name_is_valid(name)) { | |
73 | log_error("Remote name '%s' is not valid.", name); | |
74 | return -EINVAL; | |
75 | } | |
76 | ||
77 | if (!dck_tag_is_valid(tag)) { | |
78 | log_error("Tag name '%s' is not valid.", tag); | |
79 | return -EINVAL; | |
80 | } | |
81 | ||
82 | if (local) { | |
83 | const char *p; | |
84 | ||
85 | if (!machine_name_is_valid(tag)) { | |
86 | log_error("Local image name '%s' is not valid.", local); | |
87 | return -EINVAL; | |
88 | } | |
89 | ||
90 | p = strappenda("/var/lib/container/", local); | |
91 | if (laccess(p, F_OK) >= 0) { | |
92 | if (!arg_force) { | |
93 | log_info("Image '%s' already exists.", local); | |
94 | return 0; | |
95 | } | |
96 | } else if (errno != ENOENT) | |
97 | return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local); | |
98 | ||
99 | log_info("Pulling '%s' with tag '%s', saving as '%s'.", name, tag, local); | |
100 | } else | |
101 | log_info("Pulling '%s' with tag '%s'.", name, tag); | |
102 | ||
103 | r = sd_event_default(&event); | |
104 | if (r < 0) | |
105 | return log_error_errno(r, "Failed to allocate event loop: %m"); | |
106 | ||
107 | assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0); | |
108 | sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); | |
109 | sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); | |
110 | ||
111 | r = dck_import_new(&import, event, on_finished, event); | |
112 | if (r < 0) | |
113 | return log_error_errno(r, "Failed to allocate importer: %m"); | |
114 | ||
115 | r = dck_import_pull(import, name, tag, local, arg_force); | |
116 | if (r < 0) | |
117 | return log_error_errno(r, "Failed to pull image: %m"); | |
118 | ||
119 | r = sd_event_loop(event); | |
120 | if (r < 0) | |
121 | return log_error_errno(r, "Failed to run event loop: %m"); | |
122 | ||
123 | log_info("Exiting."); | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static int help(int argc, char *argv[], void *userdata) { | |
129 | ||
130 | printf("%s [OPTIONS...] {COMMAND} ...\n\n" | |
131 | "Import container or virtual machine image.\n\n" | |
132 | " -h --help Show this help\n" | |
133 | " --version Show package version\n" | |
134 | " --force Force creation of image\n\n" | |
135 | "Commands:\n" | |
136 | " pull-dck REMOTE [NAME] Download an image\n", | |
137 | program_invocation_short_name); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int parse_argv(int argc, char *argv[]) { | |
143 | ||
144 | enum { | |
145 | ARG_VERSION = 0x100, | |
146 | ARG_FORCE, | |
147 | }; | |
148 | ||
149 | static const struct option options[] = { | |
150 | { "help", no_argument, NULL, 'h' }, | |
151 | { "version", no_argument, NULL, ARG_VERSION }, | |
152 | { "force", no_argument, NULL, ARG_FORCE }, | |
153 | {} | |
154 | }; | |
155 | ||
156 | int c; | |
157 | ||
158 | assert(argc >= 0); | |
159 | assert(argv); | |
160 | ||
161 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
162 | ||
163 | switch (c) { | |
164 | ||
165 | case 'h': | |
166 | return help(argc, argv, NULL); | |
167 | ||
168 | case ARG_VERSION: | |
169 | puts(PACKAGE_STRING); | |
170 | puts(SYSTEMD_FEATURES); | |
171 | return 0; | |
172 | ||
173 | case ARG_FORCE: | |
174 | arg_force = true; | |
175 | break; | |
176 | ||
177 | case '?': | |
178 | return -EINVAL; | |
179 | ||
180 | default: | |
181 | assert_not_reached("Unhandled option"); | |
182 | } | |
183 | ||
184 | return 1; | |
185 | } | |
186 | ||
187 | static int import_main(int argc, char *argv[]) { | |
188 | ||
189 | const Verb verbs[] = { | |
190 | { "help", VERB_ANY, VERB_ANY, 0, help }, | |
191 | { "pull-dck", 2, 3, 0, pull_dck }, | |
192 | {} | |
193 | }; | |
194 | ||
195 | return dispatch_verb(argc, argv, verbs, NULL); | |
196 | } | |
197 | ||
198 | int main(int argc, char *argv[]) { | |
199 | int r; | |
200 | ||
201 | setlocale(LC_ALL, ""); | |
202 | log_parse_environment(); | |
203 | log_open(); | |
204 | ||
205 | r = parse_argv(argc, argv); | |
206 | if (r <= 0) | |
207 | goto finish; | |
208 | ||
209 | r = import_main(argc, argv); | |
210 | ||
211 | finish: | |
212 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
213 | } |