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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <locale.h>
#include "sd-event.h"
#include "sd-id128.h"
#include "alloc-util.h"
#include "discover-image.h"
#include "hostname-util.h"
#include "import-util.h"
#include "main-func.h"
#include "parse-util.h"
#include "pull-raw.h"
#include "pull-tar.h"
#include "signal-util.h"
#include "string-util.h"
#include "verbs.h"
#include "web-util.h"
static const char *arg_image_root = "/var/lib/machines";
static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE;
static PullFlags arg_pull_flags = PULL_SETTINGS | PULL_ROOTHASH | PULL_ROOTHASH_SIGNATURE | PULL_VERITY;
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_(sd_event_unrefp) 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))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"URL '%s' is not valid.", url);
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;
}
local = empty_or_dash_to_null(local);
if (local) {
r = tar_strip_suffixes(local, &ll);
if (r < 0)
return log_oom();
local = ll;
if (!hostname_is_valid(local, 0))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Local image name '%s' is not valid.",
local);
if (!FLAGS_SET(arg_pull_flags, PULL_FORCE)) {
r = image_find(IMAGE_MACHINE, local, NULL, NULL);
if (r < 0) {
if (r != -ENOENT)
return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
} else {
return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
"Image '%s' already exists.",
local);
}
}
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_pull_flags & PULL_FLAGS_MASK_TAR, 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_(sd_event_unrefp) 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))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"URL '%s' is not valid.", url);
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;
}
local = empty_or_dash_to_null(local);
if (local) {
r = raw_strip_suffixes(local, &ll);
if (r < 0)
return log_oom();
local = ll;
if (!hostname_is_valid(local, 0))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Local image name '%s' is not valid.",
local);
if (!FLAGS_SET(arg_pull_flags, PULL_FORCE)) {
r = image_find(IMAGE_MACHINE, local, NULL, NULL);
if (r < 0) {
if (r != -ENOENT)
return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
} else {
return log_error_errno(SYNTHETIC_ERRNO(EEXIST),
"Image '%s' already exists.",
local);
}
}
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_pull_flags & PULL_FLAGS_MASK_RAW, 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 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=MODE Verify downloaded image, one of: 'no',\n"
" 'checksum', 'signature'\n"
" --settings=BOOL Download settings file with image\n"
" --roothash=BOOL Download root hash file with image\n"
" --roothash-signature=BOOL\n"
" Download root hash signature file with image\n"
" --verity=BOOL Download verity file with image\n"
" --image-root=PATH Image root directory\n\n"
"Commands:\n"
" tar URL [NAME] Download a TAR image\n"
" raw URL [NAME] Download 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_VERIFY,
ARG_SETTINGS,
ARG_ROOTHASH,
ARG_ROOTHASH_SIGNATURE,
ARG_VERITY,
};
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 },
{ "verify", required_argument, NULL, ARG_VERIFY },
{ "settings", required_argument, NULL, ARG_SETTINGS },
{ "roothash", required_argument, NULL, ARG_ROOTHASH },
{ "roothash-signature", required_argument, NULL, ARG_ROOTHASH_SIGNATURE },
{ "verity", required_argument, NULL, ARG_VERITY },
{}
};
int c, r;
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_pull_flags |= PULL_FORCE;
break;
case ARG_IMAGE_ROOT:
arg_image_root = optarg;
break;
case ARG_VERIFY:
arg_verify = import_verify_from_string(optarg);
if (arg_verify < 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Invalid verification setting '%s'", optarg);
break;
case ARG_SETTINGS:
r = parse_boolean(optarg);
if (r < 0)
return log_error_errno(r, "Failed to parse --settings= parameter '%s': %m", optarg);
SET_FLAG(arg_pull_flags, PULL_SETTINGS, r);
break;
case ARG_ROOTHASH:
r = parse_boolean(optarg);
if (r < 0)
return log_error_errno(r, "Failed to parse --roothash= parameter '%s': %m", optarg);
SET_FLAG(arg_pull_flags, PULL_ROOTHASH, r);
/* If we were asked to turn off the root hash, implicitly also turn off the root hash signature */
if (!r)
SET_FLAG(arg_pull_flags, PULL_ROOTHASH_SIGNATURE, false);
break;
case ARG_ROOTHASH_SIGNATURE:
r = parse_boolean(optarg);
if (r < 0)
return log_error_errno(r, "Failed to parse --roothash-signature= parameter '%s': %m", optarg);
SET_FLAG(arg_pull_flags, PULL_ROOTHASH_SIGNATURE, r);
break;
case ARG_VERITY:
r = parse_boolean(optarg);
if (r < 0)
return log_error_errno(r, "Failed to parse --verity= parameter '%s': %m", optarg);
SET_FLAG(arg_pull_flags, PULL_VERITY, r);
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
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 },
{}
};
return dispatch_verb(argc, argv, verbs, NULL);
}
static int run(int argc, char *argv[]) {
int r;
setlocale(LC_ALL, "");
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
(void) ignore_signals(SIGPIPE);
return pull_main(argc, argv);
}
DEFINE_MAIN_FUNCTION(run);
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