src/import/pull.c

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