#include <getopt.h>

#include "sd-event.h"

#include "alloc-util.h"

#include "hostname-util.h"

#include "import-util.h"

#include "machine-image.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 bool arg_force = false;

static const char *arg_image_root = "/var/lib/machines";

static ImportVerify arg_verify = IMPORT_VERIFY_SIGNATURE;

static bool arg_settings = true;

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)) {

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, arg_settings);

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)) {

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, arg_settings);

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"

" --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,

};

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 },

{}

};

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_force = true;

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 ARG_SETTINGS:

r = parse_boolean(optarg);

if (r < 0)

return log_error_errno(r, "Failed to parse --settings= parameter '%s'", optarg);

arg_settings = r;

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 },

{}

};

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;

}