/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2015 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <getopt.h> #include "sd-event.h" #include "event-util.h" #include "fd-util.h" #include "fs-util.h" #include "hostname-util.h" #include "import-raw.h" #include "import-tar.h" #include "import-util.h" #include "machine-image.h" #include "signal-util.h" #include "string-util.h" #include "verbs.h" static bool arg_force = false; static bool arg_read_only = false; static const char *arg_image_root = "/var/lib/machines"; static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { log_notice("Transfer aborted."); sd_event_exit(sd_event_source_get_event(s), EINTR); return 0; } static void on_tar_finished(TarImport *import, int error, void *userdata) { sd_event *event = userdata; assert(import); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int import_tar(int argc, char *argv[], void *userdata) { _cleanup_(tar_import_unrefp) TarImport *import = NULL; _cleanup_event_unref_ sd_event *event = NULL; const char *path = NULL, *local = NULL; _cleanup_free_ char *ll = NULL; _cleanup_close_ int open_fd = -1; int r, fd; if (argc >= 2) path = argv[1]; if (isempty(path) || streq(path, "-")) path = NULL; if (argc >= 3) local = argv[2]; else if (path) local = basename(path); if (isempty(local) || streq(local, "-")) local = NULL; if (local) { r = tar_strip_suffixes(local, &ll); if (r < 0) return log_oom(); local = ll; if (!machine_name_is_valid(local)) { log_error("Local image name '%s' is not valid.", local); return -EINVAL; } if (!arg_force) { r = image_find(local, NULL); if (r < 0) return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); else if (r > 0) { log_error_errno(EEXIST, "Image '%s' already exists.", local); return -EEXIST; } } } else local = "imported"; if (path) { open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); if (open_fd < 0) return log_error_errno(errno, "Failed to open tar image to import: %m"); fd = open_fd; log_info("Importing '%s', saving as '%s'.", path, local); } else { _cleanup_free_ char *pretty = NULL; fd = STDIN_FILENO; (void) readlink_malloc("/proc/self/fd/0", &pretty); log_info("Importing '%s', saving as '%s'.", strna(pretty), local); } r = sd_event_default(&event); if (r < 0) return log_error_errno(r, "Failed to allocate event loop: %m"); assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); r = tar_import_new(&import, event, arg_image_root, on_tar_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate importer: %m"); r = tar_import_start(import, fd, local, arg_force, arg_read_only); if (r < 0) return log_error_errno(r, "Failed to import image: %m"); r = sd_event_loop(event); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); log_info("Exiting."); return -r; } static void on_raw_finished(RawImport *import, int error, void *userdata) { sd_event *event = userdata; assert(import); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int import_raw(int argc, char *argv[], void *userdata) { _cleanup_(raw_import_unrefp) RawImport *import = NULL; _cleanup_event_unref_ sd_event *event = NULL; const char *path = NULL, *local = NULL; _cleanup_free_ char *ll = NULL; _cleanup_close_ int open_fd = -1; int r, fd; if (argc >= 2) path = argv[1]; if (isempty(path) || streq(path, "-")) path = NULL; if (argc >= 3) local = argv[2]; else if (path) local = basename(path); if (isempty(local) || streq(local, "-")) local = NULL; if (local) { r = raw_strip_suffixes(local, &ll); if (r < 0) return log_oom(); local = ll; if (!machine_name_is_valid(local)) { log_error("Local image name '%s' is not valid.", local); return -EINVAL; } if (!arg_force) { r = image_find(local, NULL); if (r < 0) return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); else if (r > 0) { log_error_errno(EEXIST, "Image '%s' already exists.", local); return -EEXIST; } } } else local = "imported"; if (path) { open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); if (open_fd < 0) return log_error_errno(errno, "Failed to open raw image to import: %m"); fd = open_fd; log_info("Importing '%s', saving as '%s'.", path, local); } else { _cleanup_free_ char *pretty = NULL; fd = STDIN_FILENO; (void) readlink_malloc("/proc/self/fd/0", &pretty); log_info("Importing '%s', saving as '%s'.", pretty, local); } r = sd_event_default(&event); if (r < 0) return log_error_errno(r, "Failed to allocate event loop: %m"); assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); (void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL); (void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL); r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate importer: %m"); r = raw_import_start(import, fd, local, arg_force, arg_read_only); if (r < 0) return log_error_errno(r, "Failed to import image: %m"); r = sd_event_loop(event); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); log_info("Exiting."); return -r; } static int help(int argc, char *argv[], void *userdata) { printf("%s [OPTIONS...] {COMMAND} ...\n\n" "Import container or virtual machine images.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --force Force creation of image\n" " --image-root=PATH Image root directory\n" " --read-only Create a read-only image\n\n" "Commands:\n" " tar FILE [NAME] Import a TAR image\n" " raw FILE [NAME] Import a RAW image\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_FORCE, ARG_IMAGE_ROOT, ARG_READ_ONLY, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "force", no_argument, NULL, ARG_FORCE }, { "image-root", required_argument, NULL, ARG_IMAGE_ROOT }, { "read-only", no_argument, NULL, ARG_READ_ONLY }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) switch (c) { case 'h': return help(0, NULL, NULL); case ARG_VERSION: return version(); case ARG_FORCE: arg_force = true; break; case ARG_IMAGE_ROOT: arg_image_root = optarg; break; case ARG_READ_ONLY: arg_read_only = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } return 1; } static int import_main(int argc, char *argv[]) { static const Verb verbs[] = { { "help", VERB_ANY, VERB_ANY, 0, help }, { "tar", 2, 3, 0, import_tar }, { "raw", 2, 3, 0, import_raw }, {} }; return dispatch_verb(argc, argv, verbs, NULL); } int main(int argc, char *argv[]) { int r; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; (void) ignore_signals(SIGPIPE, -1); r = import_main(argc, argv); finish: return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }