src/import/pull.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <getopt.h>
   4
   5 #include "sd-event.h"
   6 #include "sd-id128.h"
   7
   8 #include "alloc-util.h"
   9 #include "hostname-util.h"
  10 #include "import-util.h"
  11 #include "machine-image.h"
  12 #include "parse-util.h"
  13 #include "pull-raw.h"
  14 #include "pull-tar.h"
  15 #include "signal-util.h"
  16 #include "string-util.h"
  17 #include "verbs.h"
  18 #include "web-util.h"
  19
  20 static bool arg_force = false;
  21 static const char *arg_image_root = "/var/lib/machines";
  22 static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE;
  23 static bool arg_settings = true;
  24 static bool arg_roothash = true;
  25
  26 static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
  27         log_notice("Transfer aborted.");
  28         sd_event_exit(sd_event_source_get_event(s), EINTR);
  29         return 0;
  30 }
  31
  32 static void on_tar_finished(TarPull *pull, int error, void *userdata) {
  33         sd_event *event = userdata;
  34         assert(pull);
  35
  36         if (error == 0)
  37                 log_info("Operation completed successfully.");
  38
  39         sd_event_exit(event, abs(error));
  40 }
  41
  42 static int pull_tar(int argc, char *argv[], void *userdata) {
  43         _cleanup_(tar_pull_unrefp) TarPull *pull = NULL;
  44         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
  45         const char *url, *local;
  46         _cleanup_free_ char *l = NULL, *ll = NULL;
  47         int r;
  48
  49         url = argv[1];
  50         if (!http_url_is_valid(url)) {
  51                 log_error("URL '%s' is not valid.", url);
  52                 return -EINVAL;
  53         }
  54
  55         if (argc >= 3)
  56                 local = argv[2];
  57         else {
  58                 r = import_url_last_component(url, &l);
  59                 if (r < 0)
  60                         return log_error_errno(r, "Failed get final component of URL: %m");
  61
  62                 local = l;
  63         }
  64
  65         if (isempty(local) || streq(local, "-"))
  66                 local = NULL;
  67
  68         if (local) {
  69                 r = tar_strip_suffixes(local, &ll);
  70                 if (r < 0)
  71                         return log_oom();
  72
  73                 local = ll;
  74
  75                 if (!machine_name_is_valid(local)) {
  76                         log_error("Local image name '%s' is not valid.", local);
  77                         return -EINVAL;
  78                 }
  79
  80                 if (!arg_force) {
  81                         r = image_find(IMAGE_MACHINE, local, NULL);
  82                         if (r < 0) {
  83                                 if (r != -ENOENT)
  84                                         return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
  85                         } else {
  86                                 log_error("Image '%s' already exists.", local);
  87                                 return -EEXIST;
  88                         }
  89                 }
  90
  91                 log_info("Pulling '%s', saving as '%s'.", url, local);
  92         } else
  93                 log_info("Pulling '%s'.", url);
  94
  95         r = sd_event_default(&event);
  96         if (r < 0)
  97                 return log_error_errno(r, "Failed to allocate event loop: %m");
  98
  99         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 100         (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
 101         (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
 102
 103         r = tar_pull_new(&pull, event, arg_image_root, on_tar_finished, event);
 104         if (r < 0)
 105                 return log_error_errno(r, "Failed to allocate puller: %m");
 106
 107         r = tar_pull_start(pull, url, local, arg_force, arg_verify, arg_settings);
 108         if (r < 0)
 109                 return log_error_errno(r, "Failed to pull image: %m");
 110
 111         r = sd_event_loop(event);
 112         if (r < 0)
 113                 return log_error_errno(r, "Failed to run event loop: %m");
 114
 115         log_info("Exiting.");
 116         return -r;
 117 }
 118
 119 static void on_raw_finished(RawPull *pull, int error, void *userdata) {
 120         sd_event *event = userdata;
 121         assert(pull);
 122
 123         if (error == 0)
 124                 log_info("Operation completed successfully.");
 125
 126         sd_event_exit(event, abs(error));
 127 }
 128
 129 static int pull_raw(int argc, char *argv[], void *userdata) {
 130         _cleanup_(raw_pull_unrefp) RawPull *pull = NULL;
 131         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 132         const char *url, *local;
 133         _cleanup_free_ char *l = NULL, *ll = NULL;
 134         int r;
 135
 136         url = argv[1];
 137         if (!http_url_is_valid(url)) {
 138                 log_error("URL '%s' is not valid.", url);
 139                 return -EINVAL;
 140         }
 141
 142         if (argc >= 3)
 143                 local = argv[2];
 144         else {
 145                 r = import_url_last_component(url, &l);
 146                 if (r < 0)
 147                         return log_error_errno(r, "Failed get final component of URL: %m");
 148
 149                 local = l;
 150         }
 151
 152         if (isempty(local) || streq(local, "-"))
 153                 local = NULL;
 154
 155         if (local) {
 156                 r = raw_strip_suffixes(local, &ll);
 157                 if (r < 0)
 158                         return log_oom();
 159
 160                 local = ll;
 161
 162                 if (!machine_name_is_valid(local)) {
 163                         log_error("Local image name '%s' is not valid.", local);
 164                         return -EINVAL;
 165                 }
 166
 167                 if (!arg_force) {
 168                         r = image_find(IMAGE_MACHINE, local, NULL);
 169                         if (r < 0) {
 170                                 if (r != -ENOENT)
 171                                         return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
 172                         } else {
 173                                 log_error("Image '%s' already exists.", local);
 174                                 return -EEXIST;
 175                         }
 176                 }
 177
 178                 log_info("Pulling '%s', saving as '%s'.", url, local);
 179         } else
 180                 log_info("Pulling '%s'.", url);
 181
 182         r = sd_event_default(&event);
 183         if (r < 0)
 184                 return log_error_errno(r, "Failed to allocate event loop: %m");
 185
 186         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 187         (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
 188         (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
 189
 190         r = raw_pull_new(&pull, event, arg_image_root, on_raw_finished, event);
 191         if (r < 0)
 192                 return log_error_errno(r, "Failed to allocate puller: %m");
 193
 194         r = raw_pull_start(pull, url, local, arg_force, arg_verify, arg_settings, arg_roothash);
 195         if (r < 0)
 196                 return log_error_errno(r, "Failed to pull image: %m");
 197
 198         r = sd_event_loop(event);
 199         if (r < 0)
 200                 return log_error_errno(r, "Failed to run event loop: %m");
 201
 202         log_info("Exiting.");
 203         return -r;
 204 }
 205
 206 static int help(int argc, char *argv[], void *userdata) {
 207
 208         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
 209                "Download container or virtual machine images.\n\n"
 210                "  -h --help                   Show this help\n"
 211                "     --version                Show package version\n"
 212                "     --force                  Force creation of image\n"
 213                "     --verify=MODE            Verify downloaded image, one of: 'no',\n"
 214                "                              'checksum', 'signature'\n"
 215                "     --settings=BOOL          Download settings file with image\n"
 216                "     --roothash=BOOL          Download root hash file with image\n"
 217                "     --image-root=PATH        Image root directory\n\n"
 218                "Commands:\n"
 219                "  tar URL [NAME]              Download a TAR image\n"
 220                "  raw URL [NAME]              Download a RAW image\n",
 221                program_invocation_short_name);
 222
 223         return 0;
 224 }
 225
 226 static int parse_argv(int argc, char *argv[]) {
 227
 228         enum {
 229                 ARG_VERSION = 0x100,
 230                 ARG_FORCE,
 231                 ARG_IMAGE_ROOT,
 232                 ARG_VERIFY,
 233                 ARG_SETTINGS,
 234                 ARG_ROOTHASH,
 235         };
 236
 237         static const struct option options[] = {
 238                 { "help",            no_argument,       NULL, 'h'                 },
 239                 { "version",         no_argument,       NULL, ARG_VERSION         },
 240                 { "force",           no_argument,       NULL, ARG_FORCE           },
 241                 { "image-root",      required_argument, NULL, ARG_IMAGE_ROOT      },
 242                 { "verify",          required_argument, NULL, ARG_VERIFY          },
 243                 { "settings",        required_argument, NULL, ARG_SETTINGS        },
 244                 { "roothash",        required_argument, NULL, ARG_ROOTHASH        },
 245                 {}
 246         };
 247
 248         int c, r;
 249
 250         assert(argc >= 0);
 251         assert(argv);
 252
 253         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 254
 255                 switch (c) {
 256
 257                 case 'h':
 258                         return help(0, NULL, NULL);
 259
 260                 case ARG_VERSION:
 261                         return version();
 262
 263                 case ARG_FORCE:
 264                         arg_force = true;
 265                         break;
 266
 267                 case ARG_IMAGE_ROOT:
 268                         arg_image_root = optarg;
 269                         break;
 270
 271                 case ARG_VERIFY:
 272                         arg_verify = import_verify_from_string(optarg);
 273                         if (arg_verify < 0) {
 274                                 log_error("Invalid verification setting '%s'", optarg);
 275                                 return -EINVAL;
 276                         }
 277
 278                         break;
 279
 280                 case ARG_SETTINGS:
 281                         r = parse_boolean(optarg);
 282                         if (r < 0)
 283                                 return log_error_errno(r, "Failed to parse --settings= parameter '%s': %m", optarg);
 284
 285                         arg_settings = r;
 286                         break;
 287
 288                 case ARG_ROOTHASH:
 289                         r = parse_boolean(optarg);
 290                         if (r < 0)
 291                                 return log_error_errno(r, "Failed to parse --roothash= parameter '%s': %m", optarg);
 292
 293                         arg_roothash = r;
 294                         break;
 295
 296                 case '?':
 297                         return -EINVAL;
 298
 299                 default:
 300                         assert_not_reached("Unhandled option");
 301                 }
 302
 303         return 1;
 304 }
 305
 306 static int pull_main(int argc, char *argv[]) {
 307
 308         static const Verb verbs[] = {
 309                 { "help", VERB_ANY, VERB_ANY, 0, help     },
 310                 { "tar",  2,        3,        0, pull_tar },
 311                 { "raw",  2,        3,        0, pull_raw },
 312                 {}
 313         };
 314
 315         return dispatch_verb(argc, argv, verbs, NULL);
 316 }
 317
 318 int main(int argc, char *argv[]) {
 319         int r;
 320
 321         setlocale(LC_ALL, "");
 322         log_parse_environment();
 323         log_open();
 324
 325         r = parse_argv(argc, argv);
 326         if (r <= 0)
 327                 goto finish;
 328
 329         (void) ignore_signals(SIGPIPE, -1);
 330
 331         r = pull_main(argc, argv);
 332
 333 finish:
 334         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 335 }