627 lines
24 KiB
C
627 lines
24 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <locale.h>
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#include <stdio.h>
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#include "sd-event.h"
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#include "alloc-util.h"
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#include "ansi-color.h"
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#include "build.h"
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#include "discover-image.h"
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#include "env-util.h"
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#include "format-table.h"
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#include "hexdecoct.h"
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#include "import-common.h"
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#include "import-util.h"
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#include "io-util.h"
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#include "iovec-util.h"
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#include "log.h"
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#include "main-func.h"
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#include "oci-util.h"
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#include "options.h"
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#include "parse-argument.h"
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#include "parse-util.h"
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#include "path-util.h"
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#include "pull-oci.h"
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#include "pull-raw.h"
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#include "pull-tar.h"
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#include "runtime-scope.h"
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#include "signal-util.h"
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#include "string-util.h"
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#include "verbs.h"
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#include "web-util.h"
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static char *arg_image_root = NULL;
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static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE;
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static ImportFlags arg_import_flags = IMPORT_PULL_SETTINGS | IMPORT_PULL_ROOTHASH | IMPORT_PULL_ROOTHASH_SIGNATURE | IMPORT_PULL_VERITY | IMPORT_BTRFS_SUBVOL | IMPORT_BTRFS_QUOTA | IMPORT_CONVERT_QCOW2 | IMPORT_SYNC;
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static uint64_t arg_offset = UINT64_MAX, arg_size_max = UINT64_MAX;
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static struct iovec arg_checksum = {};
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static ImageClass arg_class = IMAGE_MACHINE;
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static RuntimeScope arg_runtime_scope = _RUNTIME_SCOPE_INVALID;
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STATIC_DESTRUCTOR_REGISTER(arg_checksum, iovec_done);
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STATIC_DESTRUCTOR_REGISTER(arg_image_root, freep);
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static int normalize_local(const char *local, const char *url, char **ret) {
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_cleanup_free_ char *ll = NULL;
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int r;
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assert(ret);
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if (arg_import_flags & IMPORT_DIRECT) {
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if (!local)
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log_debug("Writing downloaded data to STDOUT.");
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else {
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if (!path_is_absolute(local)) {
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ll = path_join(arg_image_root, local);
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if (!ll)
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return log_oom();
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local = ll;
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}
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if (!path_is_valid(local))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Local path name '%s' is not valid.", local);
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}
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} else if (local) {
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if (!image_name_is_valid(local))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Local image name '%s' is not valid.",
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local);
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if (!FLAGS_SET(arg_import_flags, IMPORT_FORCE)) {
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r = image_find(arg_runtime_scope, arg_class, local, NULL, NULL);
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if (r < 0) {
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if (r != -ENOENT)
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return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
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} else
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return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
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"Image '%s' already exists.",
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local);
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}
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}
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if (!ll && local) {
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ll = strdup(local);
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if (!ll)
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return log_oom();
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}
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if (ll) {
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if (arg_offset != UINT64_MAX)
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log_info("Pulling '%s', saving at offset %" PRIu64 " in '%s'.", url, arg_offset, ll);
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else
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log_info("Pulling '%s', saving as '%s'.", url, ll);
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} else
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log_info("Pulling '%s'.", url);
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if (!FLAGS_SET(arg_import_flags, IMPORT_DIRECT))
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log_info("Operating on image directory '%s'.", arg_image_root);
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if (!FLAGS_SET(arg_import_flags, IMPORT_SYNC))
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log_info("File system synchronization on completion is off.");
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*ret = TAKE_PTR(ll);
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return 0;
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}
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static void on_tar_finished(TarPull *pull, int error, void *userdata) {
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sd_event *event = userdata;
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assert(pull);
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if (error == 0)
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log_info("Operation completed successfully.");
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sd_event_exit(event, ABS(error));
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}
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VERB(verb_tar, "tar", "URL [NAME]", 2, 3, 0, "Download a TAR image");
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static int verb_tar(int argc, char *argv[], uintptr_t _data, void *userdata) {
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_cleanup_free_ char *ll = NULL, *normalized = NULL;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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_cleanup_(tar_pull_unrefp) TarPull *pull = NULL;
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const char *url, *local;
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int r;
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url = argv[1];
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if (!http_url_is_valid(url) && !file_url_is_valid(url))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "URL '%s' is not valid.", url);
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if (argc >= 3)
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local = empty_or_dash_to_null(argv[2]);
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else {
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_cleanup_free_ char *l = NULL;
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r = import_url_last_component(url, &l);
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if (r < 0)
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return log_error_errno(r, "Failed to get final component of URL: %m");
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r = tar_strip_suffixes(l, &ll);
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if (r < 0)
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return log_oom();
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local = ll;
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}
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if (!local && FLAGS_SET(arg_import_flags, IMPORT_DIRECT))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Pulling tar images to STDOUT is not supported.");
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r = normalize_local(local, url, &normalized);
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if (r < 0)
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return r;
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r = import_allocate_event_with_signals(&event);
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if (r < 0)
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return r;
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r = tar_pull_new(&pull, event, arg_image_root, on_tar_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate puller: %m");
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r = tar_pull_start(
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pull,
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url,
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normalized,
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arg_import_flags & IMPORT_PULL_FLAGS_MASK_TAR,
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arg_verify,
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&arg_checksum);
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if (r < 0)
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return log_error_errno(r, "Failed to pull image: %m");
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r = sd_event_loop(event);
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if (r < 0)
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return log_error_errno(r, "Failed to run event loop: %m");
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log_info("Exiting.");
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return -r;
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}
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static void on_raw_finished(RawPull *pull, int error, void *userdata) {
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sd_event *event = userdata;
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assert(pull);
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if (error == 0)
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log_info("Operation completed successfully.");
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sd_event_exit(event, ABS(error));
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}
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VERB(verb_raw, "raw", "URL [NAME]", 2, 3, 0, "Download a RAW image");
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static int verb_raw(int argc, char *argv[], uintptr_t _data, void *userdata) {
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_cleanup_free_ char *ll = NULL, *normalized = NULL;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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_cleanup_(raw_pull_unrefp) RawPull *pull = NULL;
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const char *url, *local;
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int r;
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url = argv[1];
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if (!http_url_is_valid(url) && !file_url_is_valid(url))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "URL '%s' is not valid.", url);
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if (argc >= 3)
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local = empty_or_dash_to_null(argv[2]);
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else {
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_cleanup_free_ char *l = NULL;
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r = import_url_last_component(url, &l);
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if (r < 0)
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return log_error_errno(r, "Failed to get final component of URL: %m");
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r = raw_strip_suffixes(l, &ll);
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if (r < 0)
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return log_oom();
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local = ll;
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}
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r = normalize_local(local, url, &normalized);
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if (r < 0)
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return r;
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r = import_allocate_event_with_signals(&event);
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if (r < 0)
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return r;
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r = raw_pull_new(&pull, event, arg_image_root, on_raw_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate puller: %m");
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r = raw_pull_start(
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pull,
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url,
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normalized,
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arg_offset,
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arg_size_max,
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arg_import_flags & IMPORT_PULL_FLAGS_MASK_RAW,
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arg_verify,
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&arg_checksum);
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if (r < 0)
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return log_error_errno(r, "Failed to pull image: %m");
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r = sd_event_loop(event);
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if (r < 0)
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return log_error_errno(r, "Failed to run event loop: %m");
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log_info("Exiting.");
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return -r;
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}
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static void on_oci_finished(OciPull *pull, int error, void *userdata) {
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sd_event *event = userdata;
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assert(pull);
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if (error == 0)
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log_info("Operation completed successfully.");
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sd_event_exit(event, ABS(error));
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}
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VERB(verb_oci, "oci", "REF [NAME]", 2, 3, 0, "Download an OCI image");
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static int verb_oci(int argc, char *argv[], uintptr_t _data, void *userdata) {
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int r;
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const char *ref = argv[1];
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_cleanup_free_ char *image = NULL;
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r = oci_ref_parse(ref, /* ret_registry= */ NULL, &image, /* ret_tag= */ NULL);
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if (r == -EINVAL)
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return log_error_errno(r, "OCI ref '%s' is invalid.", ref);
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if (r < 0)
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return log_error_errno(r, "Failed to check of OCI ref '%s' is valid: %m", ref);
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_cleanup_free_ char *l = NULL;
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const char *local;
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if (argc >= 3)
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local = empty_or_dash_to_null(argv[2]);
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else {
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r = path_extract_filename(image, &l);
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if (r < 0)
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return log_error_errno(r, "Failed to get extract final component of '%s': %m", image);
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local = l;
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}
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_cleanup_free_ char *normalized = NULL;
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r = normalize_local(local, ref, &normalized);
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if (r < 0)
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return r;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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r = import_allocate_event_with_signals(&event);
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if (r < 0)
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return r;
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_cleanup_(oci_pull_unrefp) OciPull *pull = NULL;
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r = oci_pull_new(&pull, event, arg_image_root, on_oci_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate puller: %m");
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r = oci_pull_start(
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pull,
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ref,
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normalized,
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arg_import_flags & IMPORT_PULL_FLAGS_MASK_OCI);
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if (r < 0)
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return log_error_errno(r, "Failed to pull image: %m");
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r = sd_event_loop(event);
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if (r < 0)
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return log_error_errno(r, "Failed to run event loop: %m");
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log_info("Exiting.");
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return -r;
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}
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static int help(void) {
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_cleanup_(table_unrefp) Table *options = NULL, *verbs = NULL;
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int r;
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r = verbs_get_help_table(&verbs);
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if (r < 0)
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return r;
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r = option_parser_get_help_table(&options);
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if (r < 0)
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return r;
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(void) table_sync_column_widths(0, verbs, options);
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printf("%s [OPTIONS...] {COMMAND} ...\n\n"
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"%sDownload disk images.%s\n"
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"\n%sCommands:%s\n",
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program_invocation_short_name,
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ansi_highlight(),
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ansi_normal(),
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ansi_underline(),
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ansi_normal());
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r = table_print_or_warn(verbs);
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if (r < 0)
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return r;
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printf("\n%sOptions:%s\n",
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ansi_underline(),
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ansi_normal());
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r = table_print_or_warn(options);
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if (r < 0)
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return r;
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return 0;
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}
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VERB_COMMON_HELP_HIDDEN(help);
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static int parse_argv(int argc, char *argv[], char ***ret_args) {
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int r;
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bool auto_settings = true, auto_keep_download = true;
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assert(argc >= 0);
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assert(argv);
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OptionParser opts = { argc, argv };
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FOREACH_OPTION_OR_RETURN(c, &opts)
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switch (c) {
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OPTION_COMMON_HELP:
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return help();
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OPTION_COMMON_VERSION:
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return version();
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OPTION_LONG("force", NULL, "Force creation of image"):
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arg_import_flags |= IMPORT_FORCE;
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break;
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OPTION_LONG("image-root", "PATH", "Image root directory"):
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r = parse_path_argument(opts.arg, /* suppress_root= */ false, &arg_image_root);
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if (r < 0)
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return r;
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break;
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OPTION_LONG("verify", "MODE",
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"Verify downloaded image, one of: 'no', 'checksum', 'signature' or literal SHA256 hash"): {
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ImportVerify v;
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v = import_verify_from_string(opts.arg);
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if (v < 0) {
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_cleanup_free_ void *h = NULL;
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size_t n;
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/* If this is not a valid verification mode, maybe it's a literally specified
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* SHA256 hash? We can handle that too... */
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r = unhexmem(opts.arg, &h, &n);
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if (r < 0 || n == 0)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Invalid verification setting: %s", opts.arg);
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if (n != 32)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"64 hex character SHA256 hash required when specifying explicit checksum, %zu specified", n * 2);
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iovec_done(&arg_checksum);
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arg_checksum = IOVEC_MAKE(TAKE_PTR(h), n);
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arg_import_flags &= ~(IMPORT_PULL_SETTINGS|IMPORT_PULL_ROOTHASH|IMPORT_PULL_ROOTHASH_SIGNATURE|IMPORT_PULL_VERITY);
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arg_verify = _IMPORT_VERIFY_INVALID;
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} else
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arg_verify = v;
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break;
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}
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OPTION_LONG("settings", "BOOL", "Download settings file with image"):
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r = parse_boolean_argument("--settings=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_PULL_SETTINGS, r);
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auto_settings = false;
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break;
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OPTION_LONG("roothash", "BOOL", "Download root hash file with image"):
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r = parse_boolean_argument("--roothash=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_PULL_ROOTHASH, r);
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/* If we were asked to turn off the root hash, implicitly also turn off the root hash signature */
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if (!r)
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SET_FLAG(arg_import_flags, IMPORT_PULL_ROOTHASH_SIGNATURE, false);
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break;
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OPTION_LONG("roothash-signature", "BOOL",
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"Download root hash signature file with image"):
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r = parse_boolean_argument("--roothash-signature=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_PULL_ROOTHASH_SIGNATURE, r);
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break;
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OPTION_LONG("verity", "BOOL", "Download verity file with image"):
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r = parse_boolean_argument("--verity=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_PULL_VERITY, r);
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break;
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OPTION_LONG("read-only", NULL, "Create a read-only image"):
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arg_import_flags |= IMPORT_READ_ONLY;
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break;
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OPTION_LONG("direct", NULL, "Download directly to specified file"):
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arg_import_flags |= IMPORT_DIRECT;
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arg_import_flags &= ~(IMPORT_PULL_SETTINGS|IMPORT_PULL_ROOTHASH|IMPORT_PULL_ROOTHASH_SIGNATURE|IMPORT_PULL_VERITY);
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break;
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OPTION_LONG("btrfs-subvol", "BOOL",
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"Controls whether to create a btrfs subvolume instead of a directory"):
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r = parse_boolean_argument("--btrfs-subvol=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r);
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break;
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OPTION_LONG("btrfs-quota", "BOOL",
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"Controls whether to set up quota for btrfs subvolume"):
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r = parse_boolean_argument("--btrfs-quota=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r);
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break;
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OPTION_LONG("convert-qcow2", "BOOL",
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"Controls whether to convert QCOW2 images to regular disk images"):
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r = parse_boolean_argument("--convert-qcow2=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_CONVERT_QCOW2, r);
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break;
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OPTION_LONG("sync", "BOOL", "Controls whether to sync() before completing"):
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r = parse_boolean_argument("--sync=", opts.arg, NULL);
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if (r < 0)
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return r;
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SET_FLAG(arg_import_flags, IMPORT_SYNC, r);
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break;
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OPTION_LONG("offset", "BYTES", "Offset to seek to in destination"): {
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uint64_t u;
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r = safe_atou64(opts.arg, &u);
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if (r < 0)
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return log_error_errno(r, "Failed to parse --offset= argument: %s", opts.arg);
|
|
if (!FILE_SIZE_VALID(u))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --offset= switch too large: %s", opts.arg);
|
|
|
|
arg_offset = u;
|
|
break;
|
|
}
|
|
|
|
OPTION_LONG("size-max", "BYTES", "Maximum number of bytes to write to destination"): {
|
|
uint64_t u;
|
|
|
|
r = parse_size(opts.arg, 1024, &u);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --size-max= argument: %s", opts.arg);
|
|
if (!FILE_SIZE_VALID(u))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --size-max= switch too large: %s", opts.arg);
|
|
|
|
arg_size_max = u;
|
|
break;
|
|
}
|
|
|
|
OPTION_LONG("class", "CLASS",
|
|
"Select image class (machine, sysext, confext, portable)"):
|
|
arg_class = image_class_from_string(opts.arg);
|
|
if (arg_class < 0)
|
|
return log_error_errno(arg_class, "Failed to parse --class= argument: %s", opts.arg);
|
|
break;
|
|
|
|
OPTION_LONG("keep-download", "BOOL",
|
|
"Keep a pristine copy of the downloaded file around"):
|
|
r = parse_boolean(opts.arg);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse --keep-download= argument: %s", opts.arg);
|
|
|
|
SET_FLAG(arg_import_flags, IMPORT_PULL_KEEP_DOWNLOAD, r);
|
|
auto_keep_download = false;
|
|
break;
|
|
|
|
OPTION_COMMON_SYSTEM:
|
|
arg_runtime_scope = RUNTIME_SCOPE_SYSTEM;
|
|
break;
|
|
|
|
OPTION_COMMON_USER:
|
|
arg_runtime_scope = RUNTIME_SCOPE_USER;
|
|
break;
|
|
}
|
|
|
|
/* Make sure offset+size is still in the valid range if both set */
|
|
if (arg_offset != UINT64_MAX && arg_size_max != UINT64_MAX &&
|
|
((arg_size_max > (UINT64_MAX - arg_offset)) ||
|
|
!FILE_SIZE_VALID(arg_offset + arg_size_max)))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset und maximum size out of range.");
|
|
|
|
if (arg_offset != UINT64_MAX && !FLAGS_SET(arg_import_flags, IMPORT_DIRECT))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset only supported in --direct mode.");
|
|
|
|
if (iovec_is_set(&arg_checksum) && (arg_import_flags & (IMPORT_PULL_SETTINGS|IMPORT_PULL_ROOTHASH|IMPORT_PULL_ROOTHASH_SIGNATURE|IMPORT_PULL_VERITY)) != 0)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Literal checksum verification only supported if no associated files are downloaded.");
|
|
|
|
if (!arg_image_root) {
|
|
r = image_root_pick(arg_runtime_scope < 0 ? RUNTIME_SCOPE_SYSTEM : arg_runtime_scope, arg_class, /* runtime= */ false, &arg_image_root);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to pick image root: %m");
|
|
}
|
|
|
|
/* .nspawn settings files only really make sense for machine images, not for sysext/confext/portable */
|
|
if (auto_settings && arg_class != IMAGE_MACHINE)
|
|
arg_import_flags &= ~IMPORT_PULL_SETTINGS;
|
|
|
|
/* Keep the original pristine downloaded file as a copy only when dealing with machine images,
|
|
* because unlike sysext/confext/portable they are typically modified during runtime. */
|
|
if (auto_keep_download)
|
|
SET_FLAG(arg_import_flags, IMPORT_PULL_KEEP_DOWNLOAD, arg_class == IMAGE_MACHINE);
|
|
|
|
if (arg_runtime_scope == RUNTIME_SCOPE_USER)
|
|
arg_import_flags |= IMPORT_FOREIGN_UID;
|
|
|
|
*ret_args = option_parser_get_args(&opts);
|
|
return 1;
|
|
}
|
|
|
|
static void parse_env(void) {
|
|
int r;
|
|
|
|
/* Let's make these relatively low-level settings also controllable via env vars. User can then set
|
|
* them for systemd-importd.service if they like to tweak behaviour */
|
|
|
|
r = getenv_bool("SYSTEMD_IMPORT_BTRFS_SUBVOL");
|
|
if (r >= 0)
|
|
SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r);
|
|
else if (r != -ENXIO)
|
|
log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_SUBVOL: %m");
|
|
|
|
r = getenv_bool("SYSTEMD_IMPORT_BTRFS_QUOTA");
|
|
if (r >= 0)
|
|
SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r);
|
|
else if (r != -ENXIO)
|
|
log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_QUOTA: %m");
|
|
|
|
r = getenv_bool("SYSTEMD_IMPORT_SYNC");
|
|
if (r >= 0)
|
|
SET_FLAG(arg_import_flags, IMPORT_SYNC, r);
|
|
else if (r != -ENXIO)
|
|
log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_SYNC: %m");
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
int r;
|
|
|
|
setlocale(LC_ALL, "");
|
|
log_setup();
|
|
|
|
parse_env();
|
|
|
|
char **args = NULL;
|
|
r = parse_argv(argc, argv, &args);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
(void) ignore_signals(SIGPIPE);
|
|
|
|
return dispatch_verb(args, NULL);
|
|
}
|
|
|
|
DEFINE_MAIN_FUNCTION(run);
|