519 lines
16 KiB
C
519 lines
16 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <getopt.h>
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#include "sd-event.h"
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#include "event-util.h"
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#include "verbs.h"
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#include "build.h"
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#include "machine-image.h"
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#include "import-tar.h"
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#include "import-raw.h"
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#include "import-dkr.h"
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static bool arg_force = false;
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static const char *arg_image_root = "/var/lib/machines";
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static const char* arg_dkr_index_url = DEFAULT_DKR_INDEX_URL;
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static void on_tar_finished(TarImport *import, int error, void *userdata) {
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sd_event *event = userdata;
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assert(import);
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if (error == 0)
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log_info("Operation completed successfully.");
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else
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log_error_errno(error, "Operation failed: %m");
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sd_event_exit(event, error);
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}
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static int url_final_component(const char *url, char **ret) {
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const char *e, *p;
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char *s;
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e = strchrnul(url, '?');
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while (e > url && e[-1] == '/')
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e--;
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p = e;
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while (p > url && p[-1] != '/')
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p--;
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if (e <= p)
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return -EINVAL;
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s = strndup(p, e - p);
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if (!s)
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return -ENOMEM;
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*ret = s;
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return 0;
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}
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static int strip_tar_suffixes(const char *name, char **ret) {
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const char *e;
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char *s;
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e = endswith(name, ".tar");
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if (!e)
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e = endswith(name, ".tar.gz");
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if (!e)
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e = endswith(name, ".tar.xz");
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if (!e)
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e = endswith(name, ".tgz");
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if (!e)
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e = strchr(name, 0);
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if (e <= name)
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return -EINVAL;
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s = strndup(name, e - name);
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if (!s)
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return -ENOMEM;
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*ret = s;
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return 0;
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}
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static int pull_tar(int argc, char *argv[], void *userdata) {
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_cleanup_(tar_import_unrefp) TarImport *import = NULL;
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_cleanup_event_unref_ sd_event *event = NULL;
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const char *url, *local;
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_cleanup_free_ char *l = NULL, *ll = NULL;
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int r;
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url = argv[1];
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if (!http_url_is_valid(url)) {
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log_error("URL '%s' is not valid.", url);
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return -EINVAL;
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}
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if (argc >= 3)
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local = argv[2];
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else {
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r = url_final_component(url, &l);
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if (r < 0)
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return log_error_errno(r, "Failed get final component of URL: %m");
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local = l;
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}
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if (isempty(local) || streq(local, "-"))
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local = NULL;
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if (local) {
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r = strip_tar_suffixes(local, &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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if (!machine_name_is_valid(local)) {
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log_error("Local image name '%s' is not valid.", local);
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return -EINVAL;
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}
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if (!arg_force) {
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r = image_find(local, NULL);
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if (r < 0)
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return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local);
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else if (r > 0) {
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log_error_errno(EEXIST, "Image '%s' already exists.", local);
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return -EEXIST;
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}
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}
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log_info("Pulling '%s', saving as '%s'.", url, local);
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} else
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log_info("Pulling '%s'.", url);
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r = sd_event_default(&event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate event loop: %m");
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assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
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sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
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sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
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r = tar_import_new(&import, 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 importer: %m");
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r = tar_import_pull(import, url, local, arg_force);
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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 0;
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}
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static void on_raw_finished(RawImport *import, int error, void *userdata) {
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sd_event *event = userdata;
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assert(import);
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if (error == 0)
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log_info("Operation completed successfully.");
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else
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log_error_errno(error, "Operation failed: %m");
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sd_event_exit(event, error);
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}
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static int strip_raw_suffixes(const char *p, char **ret) {
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static const char suffixes[] =
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".xz\0"
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".raw\0"
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".qcow2\0"
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".img\0";
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_cleanup_free_ char *q = NULL;
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q = strdup(p);
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if (!q)
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return -ENOMEM;
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for (;;) {
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const char *sfx;
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bool changed = false;
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NULSTR_FOREACH(sfx, suffixes) {
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char *e;
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e = endswith(q, sfx);
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if (e) {
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*e = 0;
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changed = true;
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}
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}
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if (!changed)
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break;
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}
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*ret = q;
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q = NULL;
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return 0;
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}
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static int pull_raw(int argc, char *argv[], void *userdata) {
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_cleanup_(raw_import_unrefp) RawImport *import = NULL;
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_cleanup_event_unref_ sd_event *event = NULL;
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const char *url, *local;
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_cleanup_free_ char *l = NULL;
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int r;
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url = argv[1];
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if (!http_url_is_valid(url)) {
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log_error("URL '%s' is not valid.", url);
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return -EINVAL;
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}
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if (argc >= 3)
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local = argv[2];
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else {
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const char *e, *p;
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e = url + strlen(url);
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while (e > url && e[-1] == '/')
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e--;
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p = e;
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while (p > url && p[-1] != '/')
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p--;
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local = strndupa(p, e - p);
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}
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if (isempty(local) || streq(local, "-"))
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local = NULL;
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if (local) {
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const char *p;
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r = strip_raw_suffixes(local, &l);
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if (r < 0)
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return log_oom();
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local = l;
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if (!machine_name_is_valid(local)) {
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log_error("Local image name '%s' is not valid.", local);
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return -EINVAL;
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}
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p = strappenda(arg_image_root, "/", local, ".raw");
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if (laccess(p, F_OK) >= 0) {
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if (!arg_force) {
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log_info("Image '%s' already exists.", local);
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return 0;
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}
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} else if (errno != ENOENT)
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return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local);
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log_info("Pulling '%s', saving as '%s'.", url, local);
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} else
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log_info("Pulling '%s'.", url);
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r = sd_event_default(&event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate event loop: %m");
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assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
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sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
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sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
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r = raw_import_new(&import, 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 importer: %m");
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r = raw_import_pull(import, url, local, arg_force);
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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 0;
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}
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static void on_dkr_finished(DkrImport *import, int error, void *userdata) {
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sd_event *event = userdata;
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assert(import);
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if (error == 0)
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log_info("Operation completed successfully.");
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else
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log_error_errno(error, "Operation failed: %m");
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sd_event_exit(event, error);
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}
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static int pull_dkr(int argc, char *argv[], void *userdata) {
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_cleanup_(dkr_import_unrefp) DkrImport *import = NULL;
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_cleanup_event_unref_ sd_event *event = NULL;
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const char *name, *tag, *local;
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int r;
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if (!arg_dkr_index_url) {
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log_error("Please specify an index URL with --dkr-index-url=");
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return -EINVAL;
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}
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tag = strchr(argv[1], ':');
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if (tag) {
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name = strndupa(argv[1], tag - argv[1]);
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tag++;
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} else {
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name = argv[1];
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tag = "latest";
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}
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if (!dkr_name_is_valid(name)) {
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log_error("Remote name '%s' is not valid.", name);
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return -EINVAL;
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}
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if (!dkr_tag_is_valid(tag)) {
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log_error("Tag name '%s' is not valid.", tag);
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return -EINVAL;
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}
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if (argc >= 3)
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local = argv[2];
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else {
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local = strchr(name, '/');
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if (local)
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local++;
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else
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local = name;
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}
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if (isempty(local) || streq(local, "-"))
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local = NULL;
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if (local) {
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const char *p;
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if (!machine_name_is_valid(local)) {
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log_error("Local image name '%s' is not valid.", local);
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return -EINVAL;
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}
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p = strappenda(arg_image_root, "/", local);
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if (laccess(p, F_OK) >= 0) {
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if (!arg_force) {
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log_info("Image '%s' already exists.", local);
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return 0;
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}
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} else if (errno != ENOENT)
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return log_error_errno(errno, "Can't check if image '%s' already exists: %m", local);
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log_info("Pulling '%s' with tag '%s', saving as '%s'.", name, tag, local);
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} else
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log_info("Pulling '%s' with tag '%s'.", name, tag);
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r = sd_event_default(&event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate event loop: %m");
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assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
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sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
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sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
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r = dkr_import_new(&import, event, arg_dkr_index_url, arg_image_root, on_dkr_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate importer: %m");
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r = dkr_import_pull(import, name, tag, local, arg_force);
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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 0;
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}
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static int help(int argc, char *argv[], void *userdata) {
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printf("%s [OPTIONS...] {COMMAND} ...\n\n"
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"Import container or virtual machine image.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --force Force creation of image\n"
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" --image-root= Image root directory\n"
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" --dkr-index-url=URL Specify index URL to use for downloads\n\n"
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"Commands:\n"
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" pull-tar URL Download a TAR image\n"
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" pull-raw URL [NAME] Download a RAW image\n"
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" pull-dkr REMOTE [NAME] Download a DKR image\n",
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program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_FORCE,
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ARG_DKR_INDEX_URL,
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ARG_IMAGE_ROOT,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "force", no_argument, NULL, ARG_FORCE },
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{ "dkr-index-url", required_argument, NULL, ARG_DKR_INDEX_URL },
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{ "image-root", required_argument, NULL, ARG_IMAGE_ROOT },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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return help(0, NULL, NULL);
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(SYSTEMD_FEATURES);
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return 0;
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case ARG_FORCE:
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arg_force = true;
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break;
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case ARG_DKR_INDEX_URL:
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if (!dkr_url_is_valid(optarg)) {
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log_error("Index URL is not valid: %s", optarg);
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return -EINVAL;
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}
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arg_dkr_index_url = optarg;
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break;
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case ARG_IMAGE_ROOT:
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arg_image_root = optarg;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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return 1;
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}
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static int import_main(int argc, char *argv[]) {
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static const Verb verbs[] = {
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{ "help", VERB_ANY, VERB_ANY, 0, help },
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{ "pull-tar", 2, 3, 0, pull_tar },
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{ "pull-raw", 2, 3, 0, pull_raw },
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{ "pull-dkr", 2, 3, 0, pull_dkr },
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{}
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};
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return dispatch_verb(argc, argv, verbs, NULL);
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}
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int main(int argc, char *argv[]) {
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int r;
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setlocale(LC_ALL, "");
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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r = import_main(argc, argv);
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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