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/*-*- 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 "import-dkr.h"
static bool arg_force = false;
static const char* arg_dkr_index_url = DEFAULT_DKR_INDEX_URL;
static void on_finished(DkrImport *import, int error, void *userdata) {
sd_event *event = userdata;
assert(import);
if (error == 0)
log_info("Operation completed successfully.");
else
log_info_errno(error, "Operation failed: %m");
sd_event_exit(event, error);
}
static int pull_dkr(int argc, char *argv[], void *userdata) {
_cleanup_(dkr_import_unrefp) DkrImport *import = NULL;
_cleanup_event_unref_ sd_event *event = NULL;
const char *name, *tag, *local;
int r;
if (!arg_dkr_index_url) {
log_error("Please specify an index URL with --dkr-index-url=");
return -EINVAL;
}
tag = strchr(argv[1], ':');
if (tag) {
name = strndupa(argv[1], tag - argv[1]);
tag++;
} else {
name = argv[1];
tag = "latest";
}
if (argc >= 3)
local = argv[2];
else {
local = strchr(name, '/');
if (local)
local++;
else
local = name;
}
if (isempty(local) || streq(local, "-"))
local = NULL;
if (!dkr_name_is_valid(name)) {
log_error("Remote name '%s' is not valid.", name);
return -EINVAL;
}
if (!dkr_tag_is_valid(tag)) {
log_error("Tag name '%s' is not valid.", tag);
return -EINVAL;
}
if (local) {
const char *p;
if (!machine_name_is_valid(local)) {
log_error("Local image name '%s' is not valid.", local);
return -EINVAL;
}
p = strappenda("/var/lib/container/", local);
if (laccess(p, F_OK) >= 0) {
if (!arg_force) {
log_info("Image '%s' already exists.", local);
return 0;
}
} else if (errno != ENOENT)
return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local);
log_info("Pulling '%s' with tag '%s', saving as '%s'.", name, tag, local);
} else
log_info("Pulling '%s' with tag '%s'.", name, tag);
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, SIGTERM, SIGINT, -1) == 0);
sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
r = dkr_import_new(&import, event, arg_dkr_index_url, on_dkr_finished, event);
if (r < 0)
return log_error_errno(r, "Failed to allocate importer: %m");
r = dkr_import_pull(import, name, tag, local, arg_force);
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 0;
}
static int help(int argc, char *argv[], void *userdata) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Import container or virtual machine image.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --force Force creation of image\n"
" --dkr-index-url=URL Specify index URL to use for downloads\n\n"
"Commands:\n"
" pull-dkr REMOTE [NAME] Download an 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,
};
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 },
{}
};
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 (!dkr_url_is_valid(optarg)) {
log_error("Index URL is not valid: %s", optarg);
return -EINVAL;
}
arg_dkr_index_url = optarg;
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 },
{ "pull-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;
r = import_main(argc, argv);
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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