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