src/import/import.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 "fd-util.h"
  10 #include "fs-util.h"
  11 #include "hostname-util.h"
  12 #include "import-raw.h"
  13 #include "import-tar.h"
  14 #include "import-util.h"
  15 #include "machine-image.h"
  16 #include "signal-util.h"
  17 #include "string-util.h"
  18 #include "verbs.h"
  19
  20 static bool arg_force = false;
  21 static bool arg_read_only = false;
  22 static const char *arg_image_root = "/var/lib/machines";
  23
  24 static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
  25         log_notice("Transfer aborted.");
  26         sd_event_exit(sd_event_source_get_event(s), EINTR);
  27         return 0;
  28 }
  29
  30 static void on_tar_finished(TarImport *import, int error, void *userdata) {
  31         sd_event *event = userdata;
  32         assert(import);
  33
  34         if (error == 0)
  35                 log_info("Operation completed successfully.");
  36
  37         sd_event_exit(event, abs(error));
  38 }
  39
  40 static int import_tar(int argc, char *argv[], void *userdata) {
  41         _cleanup_(tar_import_unrefp) TarImport *import = NULL;
  42         _cleanup_(sd_event_unrefp) sd_event *event = NULL;
  43         const char *path = NULL, *local = NULL;
  44         _cleanup_free_ char *ll = NULL;
  45         _cleanup_close_ int open_fd = -1;
  46         int r, fd;
  47
  48         if (argc >= 2)
  49                 path = argv[1];
  50         if (isempty(path) || streq(path, "-"))
  51                 path = NULL;
  52
  53         if (argc >= 3)
  54                 local = argv[2];
  55         else if (path)
  56                 local = basename(path);
  57         if (isempty(local) || streq(local, "-"))
  58                 local = NULL;
  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) readlink_malloc("/proc/self/fd/0", &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         if (isempty(path) || streq(path, "-"))
 147                 path = NULL;
 148
 149         if (argc >= 3)
 150                 local = argv[2];
 151         else if (path)
 152                 local = basename(path);
 153         if (isempty(local) || streq(local, "-"))
 154                 local = NULL;
 155
 156         if (local) {
 157                 r = raw_strip_suffixes(local, &ll);
 158                 if (r < 0)
 159                         return log_oom();
 160
 161                 local = ll;
 162
 163                 if (!machine_name_is_valid(local)) {
 164                         log_error("Local image name '%s' is not valid.", local);
 165                         return -EINVAL;
 166                 }
 167
 168                 if (!arg_force) {
 169                         r = image_find(IMAGE_MACHINE, local, NULL);
 170                         if (r < 0) {
 171                                 if (r != -ENOENT)
 172                                         return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
 173                         } else {
 174                                 log_error("Image '%s' already exists.", local);
 175                                 return -EEXIST;
 176                         }
 177                 }
 178         } else
 179                 local = "imported";
 180
 181         if (path) {
 182                 open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
 183                 if (open_fd < 0)
 184                         return log_error_errno(errno, "Failed to open raw image to import: %m");
 185
 186                 fd = open_fd;
 187
 188                 log_info("Importing '%s', saving as '%s'.", path, local);
 189         } else {
 190                 _cleanup_free_ char *pretty = NULL;
 191
 192                 fd = STDIN_FILENO;
 193
 194                 (void) readlink_malloc("/proc/self/fd/0", &pretty);
 195                 log_info("Importing '%s', saving as '%s'.", strempty(pretty), local);
 196         }
 197
 198         r = sd_event_default(&event);
 199         if (r < 0)
 200                 return log_error_errno(r, "Failed to allocate event loop: %m");
 201
 202         assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
 203         (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler,  NULL);
 204         (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
 205
 206         r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event);
 207         if (r < 0)
 208                 return log_error_errno(r, "Failed to allocate importer: %m");
 209
 210         r = raw_import_start(import, fd, local, arg_force, arg_read_only);
 211         if (r < 0)
 212                 return log_error_errno(r, "Failed to import image: %m");
 213
 214         r = sd_event_loop(event);
 215         if (r < 0)
 216                 return log_error_errno(r, "Failed to run event loop: %m");
 217
 218         log_info("Exiting.");
 219         return -r;
 220 }
 221
 222 static int help(int argc, char *argv[], void *userdata) {
 223
 224         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
 225                "Import container or virtual machine images.\n\n"
 226                "  -h --help                   Show this help\n"
 227                "     --version                Show package version\n"
 228                "     --force                  Force creation of image\n"
 229                "     --image-root=PATH        Image root directory\n"
 230                "     --read-only              Create a read-only image\n\n"
 231                "Commands:\n"
 232                "  tar FILE [NAME]             Import a TAR image\n"
 233                "  raw FILE [NAME]             Import a RAW image\n",
 234                program_invocation_short_name);
 235
 236         return 0;
 237 }
 238
 239 static int parse_argv(int argc, char *argv[]) {
 240
 241         enum {
 242                 ARG_VERSION = 0x100,
 243                 ARG_FORCE,
 244                 ARG_IMAGE_ROOT,
 245                 ARG_READ_ONLY,
 246         };
 247
 248         static const struct option options[] = {
 249                 { "help",            no_argument,       NULL, 'h'                 },
 250                 { "version",         no_argument,       NULL, ARG_VERSION         },
 251                 { "force",           no_argument,       NULL, ARG_FORCE           },
 252                 { "image-root",      required_argument, NULL, ARG_IMAGE_ROOT      },
 253                 { "read-only",       no_argument,       NULL, ARG_READ_ONLY       },
 254                 {}
 255         };
 256
 257         int c;
 258
 259         assert(argc >= 0);
 260         assert(argv);
 261
 262         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
 263
 264                 switch (c) {
 265
 266                 case 'h':
 267                         return help(0, NULL, NULL);
 268
 269                 case ARG_VERSION:
 270                         return version();
 271
 272                 case ARG_FORCE:
 273                         arg_force = true;
 274                         break;
 275
 276                 case ARG_IMAGE_ROOT:
 277                         arg_image_root = optarg;
 278                         break;
 279
 280                 case ARG_READ_ONLY:
 281                         arg_read_only = true;
 282                         break;
 283
 284                 case '?':
 285                         return -EINVAL;
 286
 287                 default:
 288                         assert_not_reached("Unhandled option");
 289                 }
 290
 291         return 1;
 292 }
 293
 294 static int import_main(int argc, char *argv[]) {
 295
 296         static const Verb verbs[] = {
 297                 { "help", VERB_ANY, VERB_ANY, 0, help       },
 298                 { "tar",  2,        3,        0, import_tar },
 299                 { "raw",  2,        3,        0, import_raw },
 300                 {}
 301         };
 302
 303         return dispatch_verb(argc, argv, verbs, NULL);
 304 }
 305
 306 int main(int argc, char *argv[]) {
 307         int r;
 308
 309         setlocale(LC_ALL, "");
 310         log_parse_environment();
 311         log_open();
 312
 313         r = parse_argv(argc, argv);
 314         if (r <= 0)
 315                 goto finish;
 316
 317         (void) ignore_signals(SIGPIPE, -1);
 318
 319         r = import_main(argc, argv);
 320
 321 finish:
 322         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 323 }