src/import/import.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 "fd-util.h"
  11 #include "fs-util.h"
  12 #include "hostname-util.h"
  13 #include "import-raw.h"
  14 #include "import-tar.h"
  15 #include "import-util.h"
  16 #include "machine-image.h"
  17 #include "main-func.h"
  18 #include "signal-util.h"
  19 #include "string-util.h"
  20 #include "verbs.h"
  21
  22 static bool arg_force = false;
  23 static bool arg_read_only = false;
  24 static const char *arg_image_root = "/var/lib/machines";
  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(TarImport *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
  39         sd_event_exit(event, abs(error));
  40 }
  41
  42 static int import_tar(int argc, char *argv[], void *userdata) {
  43         _cleanup_(tar_import_unrefp) TarImport *import = NULL;
  44         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
  45         const char *path = NULL, *local = NULL;
  46         _cleanup_free_ char *ll = NULL;
  47         _cleanup_close_ int open_fd = -1;
  48         int r, fd;
  49
  50         if (argc >= 2)
  51                 path = argv[1];
  52         if (isempty(path) || streq(path, "-"))
  53                 path = NULL;
  54
  55         if (argc >= 3)
  56                 local = argv[2];
  57         else if (path)
  58                 local = basename(path);
  59         if (isempty(local) || streq(local, "-"))
  60                 local = NULL;
  61
  62         if (local) {
  63                 r = tar_strip_suffixes(local, &ll);
  64                 if (r < 0)
  65                         return log_oom();
  66
  67                 local = ll;
  68
  69                 if (!machine_name_is_valid(local)) {
  70                         log_error("Local image name '%s' is not valid.", local);
  71                         return -EINVAL;
  72                 }
  73
  74                 if (!arg_force) {
  75                         r = image_find(IMAGE_MACHINE, local, NULL);
  76                         if (r < 0) {
  77                                 if (r != -ENOENT)
  78                                         return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
  79                         } else {
  80                                 log_error("Image '%s' already exists.", local);
  81                                 return -EEXIST;
  82                         }
  83                 }
  84         } else
  85                 local = "imported";
  86
  87         if (path) {
  88                 open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
  89                 if (open_fd < 0)
  90                         return log_error_errno(errno, "Failed to open tar image to import: %m");
  91
  92                 fd = open_fd;
  93
  94                 log_info("Importing '%s', saving as '%s'.", path, local);
  95         } else {
  96                 _cleanup_free_ char *pretty = NULL;
  97
  98                 fd = STDIN_FILENO;
  99
 100                 (void) fd_get_path(fd, &pretty);
 101                 log_info("Importing '%s', saving as '%s'.", strna(pretty), local);
 102         }
 103
 104         r = sd_event_default(&event);
 105         if (r < 0)
 106                 return log_error_errno(r, "Failed to allocate event loop: %m");
 107
 108         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 109         (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
 110         (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
 111
 112         r = tar_import_new(&import, event, arg_image_root, on_tar_finished, event);
 113         if (r < 0)
 114                 return log_error_errno(r, "Failed to allocate importer: %m");
 115
 116         r = tar_import_start(import, fd, local, arg_force, arg_read_only);
 117         if (r < 0)
 118                 return log_error_errno(r, "Failed to import image: %m");
 119
 120         r = sd_event_loop(event);
 121         if (r < 0)
 122                 return log_error_errno(r, "Failed to run event loop: %m");
 123
 124         log_info("Exiting.");
 125         return -r;
 126 }
 127
 128 static void on_raw_finished(RawImport *import, int error, void *userdata) {
 129         sd_event *event = userdata;
 130         assert(import);
 131
 132         if (error == 0)
 133                 log_info("Operation completed successfully.");
 134
 135         sd_event_exit(event, abs(error));
 136 }
 137
 138 static int import_raw(int argc, char *argv[], void *userdata) {
 139         _cleanup_(raw_import_unrefp) RawImport *import = NULL;
 140         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 141         const char *path = NULL, *local = NULL;
 142         _cleanup_free_ char *ll = NULL;
 143         _cleanup_close_ int open_fd = -1;
 144         int r, fd;
 145
 146         if (argc >= 2)
 147                 path = argv[1];
 148         if (isempty(path) || streq(path, "-"))
 149                 path = NULL;
 150
 151         if (argc >= 3)
 152                 local = argv[2];
 153         else if (path)
 154                 local = basename(path);
 155         if (isempty(local) || streq(local, "-"))
 156                 local = NULL;
 157
 158         if (local) {
 159                 r = raw_strip_suffixes(local, &ll);
 160                 if (r < 0)
 161                         return log_oom();
 162
 163                 local = ll;
 164
 165                 if (!machine_name_is_valid(local)) {
 166                         log_error("Local image name '%s' is not valid.", local);
 167                         return -EINVAL;
 168                 }
 169
 170                 if (!arg_force) {
 171                         r = image_find(IMAGE_MACHINE, local, NULL);
 172                         if (r < 0) {
 173                                 if (r != -ENOENT)
 174                                         return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
 175                         } else {
 176                                 log_error("Image '%s' already exists.", local);
 177                                 return -EEXIST;
 178                         }
 179                 }
 180         } else
 181                 local = "imported";
 182
 183         if (path) {
 184                 open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
 185                 if (open_fd < 0)
 186                         return log_error_errno(errno, "Failed to open raw image to import: %m");
 187
 188                 fd = open_fd;
 189
 190                 log_info("Importing '%s', saving as '%s'.", path, local);
 191         } else {
 192                 _cleanup_free_ char *pretty = NULL;
 193
 194                 fd = STDIN_FILENO;
 195
 196                 (void) fd_get_path(fd, &pretty);
 197                 log_info("Importing '%s', saving as '%s'.", strempty(pretty), local);
 198         }
 199
 200         r = sd_event_default(&event);
 201         if (r < 0)
 202                 return log_error_errno(r, "Failed to allocate event loop: %m");
 203
 204         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 205         (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
 206         (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
 207
 208         r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event);
 209         if (r < 0)
 210                 return log_error_errno(r, "Failed to allocate importer: %m");
 211
 212         r = raw_import_start(import, fd, local, arg_force, arg_read_only);
 213         if (r < 0)
 214                 return log_error_errno(r, "Failed to import image: %m");
 215
 216         r = sd_event_loop(event);
 217         if (r < 0)
 218                 return log_error_errno(r, "Failed to run event loop: %m");
 219
 220         log_info("Exiting.");
 221         return -r;
 222 }
 223
 224 static int help(int argc, char *argv[], void *userdata) {
 225
 226         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
 227                "Import container or virtual machine images.\n\n"
 228                "  -h --help                   Show this help\n"
 229                "     --version                Show package version\n"
 230                "     --force                  Force creation of image\n"
 231                "     --image-root=PATH        Image root directory\n"
 232                "     --read-only              Create a read-only image\n\n"
 233                "Commands:\n"
 234                "  tar FILE [NAME]             Import a TAR image\n"
 235                "  raw FILE [NAME]             Import a RAW image\n",
 236                program_invocation_short_name);
 237
 238         return 0;
 239 }
 240
 241 static int parse_argv(int argc, char *argv[]) {
 242
 243         enum {
 244                 ARG_VERSION = 0x100,
 245                 ARG_FORCE,
 246                 ARG_IMAGE_ROOT,
 247                 ARG_READ_ONLY,
 248         };
 249
 250         static const struct option options[] = {
 251                 { "help",            no_argument,       NULL, 'h'                 },
 252                 { "version",         no_argument,       NULL, ARG_VERSION         },
 253                 { "force",           no_argument,       NULL, ARG_FORCE           },
 254                 { "image-root",      required_argument, NULL, ARG_IMAGE_ROOT      },
 255                 { "read-only",       no_argument,       NULL, ARG_READ_ONLY       },
 256                 {}
 257         };
 258
 259         int c;
 260
 261         assert(argc >= 0);
 262         assert(argv);
 263
 264         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 265
 266                 switch (c) {
 267
 268                 case 'h':
 269                         return help(0, NULL, NULL);
 270
 271                 case ARG_VERSION:
 272                         return version();
 273
 274                 case ARG_FORCE:
 275                         arg_force = true;
 276                         break;
 277
 278                 case ARG_IMAGE_ROOT:
 279                         arg_image_root = optarg;
 280                         break;
 281
 282                 case ARG_READ_ONLY:
 283                         arg_read_only = true;
 284                         break;
 285
 286                 case '?':
 287                         return -EINVAL;
 288
 289                 default:
 290                         assert_not_reached("Unhandled option");
 291                 }
 292
 293         return 1;
 294 }
 295
 296 static int import_main(int argc, char *argv[]) {
 297         static const Verb verbs[] = {
 298                 { "help", VERB_ANY, VERB_ANY, 0, help       },
 299                 { "tar",  2,        3,        0, import_tar },
 300                 { "raw",  2,        3,        0, import_raw },
 301                 {}
 302         };
 303
 304         return dispatch_verb(argc, argv, verbs, NULL);
 305 }
 306
 307 static int run(int argc, char *argv[]) {
 308         int r;
 309
 310         setlocale(LC_ALL, "");
 311         log_parse_environment();
 312         log_open();
 313
 314         r = parse_argv(argc, argv);
 315         if (r <= 0)
 316                 return 0;
 317
 318         (void) ignore_signals(SIGPIPE, -1);
 319
 320         return import_main(argc, argv);
 321 }
 322
 323 DEFINE_MAIN_FUNCTION(run);