/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 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 "verbs.h" #include "build.h" #include "signal-util.h" #include "machine-image.h" #include "import-util.h" #include "pull-tar.h" #include "pull-raw.h" #include "pull-dkr.h" static bool arg_force = false; static const char *arg_image_root = "/var/lib/machines"; static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE; static const char* arg_dkr_index_url = DEFAULT_DKR_INDEX_URL; 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(TarPull *pull, int error, void *userdata) { sd_event *event = userdata; assert(pull); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int pull_tar(int argc, char *argv[], void *userdata) { _cleanup_(tar_pull_unrefp) TarPull *pull = NULL; _cleanup_event_unref_ sd_event *event = NULL; const char *url, *local; _cleanup_free_ char *l = NULL, *ll = NULL; int r; url = argv[1]; if (!http_url_is_valid(url)) { log_error("URL '%s' is not valid.", url); return -EINVAL; } if (argc >= 3) local = argv[2]; else { r = import_url_last_component(url, &l); if (r < 0) return log_error_errno(r, "Failed get final component of URL: %m"); local = l; } 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; } } log_info("Pulling '%s', saving as '%s'.", url, local); } else log_info("Pulling '%s'.", url); 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_pull_new(&pull, event, arg_image_root, on_tar_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate puller: %m"); r = tar_pull_start(pull, url, local, arg_force, arg_verify); if (r < 0) return log_error_errno(r, "Failed to pull 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(RawPull *pull, int error, void *userdata) { sd_event *event = userdata; assert(pull); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int pull_raw(int argc, char *argv[], void *userdata) { _cleanup_(raw_pull_unrefp) RawPull *pull = NULL; _cleanup_event_unref_ sd_event *event = NULL; const char *url, *local; _cleanup_free_ char *l = NULL, *ll = NULL; int r; url = argv[1]; if (!http_url_is_valid(url)) { log_error("URL '%s' is not valid.", url); return -EINVAL; } if (argc >= 3) local = argv[2]; else { r = import_url_last_component(url, &l); if (r < 0) return log_error_errno(r, "Failed get final component of URL: %m"); local = l; } 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; } } log_info("Pulling '%s', saving as '%s'.", url, local); } else log_info("Pulling '%s'.", url); 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_pull_new(&pull, event, arg_image_root, on_raw_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate puller: %m"); r = raw_pull_start(pull, url, local, arg_force, arg_verify); if (r < 0) return log_error_errno(r, "Failed to pull 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_dkr_finished(DkrPull *pull, int error, void *userdata) { sd_event *event = userdata; assert(pull); if (error == 0) log_info("Operation completed successfully."); sd_event_exit(event, abs(error)); } static int pull_dkr(int argc, char *argv[], void *userdata) { _cleanup_(dkr_pull_unrefp) DkrPull *pull = NULL; _cleanup_event_unref_ sd_event *event = NULL; const char *name, *reference, *local, *digest; int r; if (!arg_dkr_index_url) { log_error("Please specify an index URL with --dkr-index-url="); return -EINVAL; } if (arg_verify != IMPORT_VERIFY_NO) { log_error("Pulls from dkr do not support image verification, please pass --verify=no."); return -EINVAL; } digest = strchr(argv[1], '@'); if (digest) { reference = digest + 1; name = strndupa(argv[1], digest - argv[1]); } else { reference = strchr(argv[1], ':'); if (reference) { name = strndupa(argv[1], reference - argv[1]); reference++; } else { name = argv[1]; reference = "latest"; } } if (!dkr_name_is_valid(name)) { log_error("Remote name '%s' is not valid.", name); return -EINVAL; } if (!dkr_ref_is_valid(reference)) { log_error("Tag name '%s' is not valid.", reference); return -EINVAL; } if (argc >= 3) local = argv[2]; else { local = strchr(name, '/'); if (local) local++; else local = name; } if (isempty(local) || streq(local, "-")) local = NULL; if (local) { 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; } } log_info("Pulling '%s' with reference '%s', saving as '%s'.", name, reference, local); } else log_info("Pulling '%s' with reference '%s'.", name, reference); 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 = dkr_pull_new(&pull, event, arg_dkr_index_url, arg_image_root, on_dkr_finished, event); if (r < 0) return log_error_errno(r, "Failed to allocate puller: %m"); r = dkr_pull_start(pull, name, reference, local, arg_force, DKR_PULL_V2); if (r < 0) return log_error_errno(r, "Failed to pull 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" "Download container or virtual machine images.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --force Force creation of image\n" " --verify= Verify downloaded image, one of: 'no',\n" " 'checksum', 'signature'.\n" " --image-root=PATH Image root directory\n" " --dkr-index-url=URL Specify index URL to use for downloads\n\n" "Commands:\n" " tar URL [NAME] Download a TAR image\n" " raw URL [NAME] Download a RAW image\n" " dkr REMOTE [NAME] Download a DKR image\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_FORCE, ARG_DKR_INDEX_URL, ARG_IMAGE_ROOT, ARG_VERIFY, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "force", no_argument, NULL, ARG_FORCE }, { "dkr-index-url", required_argument, NULL, ARG_DKR_INDEX_URL }, { "image-root", required_argument, NULL, ARG_IMAGE_ROOT }, { "verify", required_argument, NULL, ARG_VERIFY }, {} }; 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: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_FORCE: arg_force = true; break; case ARG_DKR_INDEX_URL: if (!http_url_is_valid(optarg)) { log_error("Index URL is not valid: %s", optarg); return -EINVAL; } arg_dkr_index_url = optarg; break; case ARG_IMAGE_ROOT: arg_image_root = optarg; break; case ARG_VERIFY: arg_verify = import_verify_from_string(optarg); if (arg_verify < 0) { log_error("Invalid verification setting '%s'", optarg); return -EINVAL; } break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } return 1; } static int pull_main(int argc, char *argv[]) { static const Verb verbs[] = { { "help", VERB_ANY, VERB_ANY, 0, help }, { "tar", 2, 3, 0, pull_tar }, { "raw", 2, 3, 0, pull_raw }, { "dkr", 2, 3, 0, pull_dkr }, {} }; 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 = pull_main(argc, argv); finish: return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }