mirror of
https://github.com/systemd/systemd.git
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337 lines
11 KiB
C
337 lines
11 KiB
C
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/*-*- 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 2015 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-util.h"
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#include "import-tar.h"
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#include "import-raw.h"
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static bool arg_force = false;
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static bool arg_read_only = false;
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static const char *arg_image_root = "/var/lib/machines";
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static int interrupt_signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
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log_notice("Transfer aborted.");
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sd_event_exit(sd_event_source_get_event(s), EINTR);
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return 0;
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}
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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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sd_event_exit(event, abs(error));
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}
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static int import_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 *path = NULL, *local = NULL;
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_cleanup_free_ char *ll = NULL;
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_cleanup_close_ int open_fd = -1;
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int r, fd;
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if (argc >= 2)
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path = argv[1];
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if (isempty(path) || streq(path, "-"))
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path = NULL;
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if (argc >= 3)
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local = argv[2];
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else if (path)
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local = basename(path);
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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 = tar_strip_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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} else
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local = "imported";
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if (path) {
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open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
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if (open_fd < 0)
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return log_error_errno(errno, "Failed to open tar image to import: %m");
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fd = open_fd;
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log_info("Importing '%s', saving as '%s'.", path, local);
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} else {
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_cleanup_free_ char *pretty = NULL;
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fd = STDIN_FILENO;
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(void) readlink_malloc("/proc/self/fd/0", &pretty);
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log_info("Importing '%s', saving as '%s'.", strna(pretty), local);
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}
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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, interrupt_signal_handler, NULL);
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sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, 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_start(import, fd, local, arg_force, arg_read_only);
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if (r < 0)
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return log_error_errno(r, "Failed to import 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(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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sd_event_exit(event, abs(error));
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}
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static int import_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 *path = NULL, *local = NULL;
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_cleanup_free_ char *ll = NULL;
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_cleanup_close_ int open_fd = -1;
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int r, fd;
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if (argc >= 2)
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path = argv[1];
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if (isempty(path) || streq(path, "-"))
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path = NULL;
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if (argc >= 3)
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local = argv[2];
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else if (path)
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local = basename(path);
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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 = raw_strip_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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} else
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local = "imported";
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if (path) {
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open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY);
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if (open_fd < 0)
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return log_error_errno(errno, "Failed to open raw image to import: %m");
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fd = open_fd;
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log_info("Importing '%s', saving as '%s'.", path, local);
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} else {
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_cleanup_free_ char *pretty = NULL;
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fd = STDIN_FILENO;
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(void) readlink_malloc("/proc/self/fd/0", &pretty);
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log_info("Importing '%s', saving as '%s'.", pretty, local);
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}
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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, interrupt_signal_handler, NULL);
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sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, 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_start(import, fd, local, arg_force, arg_read_only);
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if (r < 0)
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return log_error_errno(r, "Failed to import 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(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=PATH Image root directory\n"
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" --read-only Create a read-only image\n\n"
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"Commands:\n"
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" tar FILE [NAME] Download a TAR image\n"
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" raw FILE [NAME] Download a RAW 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_IMAGE_ROOT,
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ARG_READ_ONLY,
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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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{ "image-root", required_argument, NULL, ARG_IMAGE_ROOT },
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{ "read-only", no_argument, NULL, ARG_READ_ONLY },
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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_IMAGE_ROOT:
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arg_image_root = optarg;
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break;
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case ARG_READ_ONLY:
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arg_read_only = true;
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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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{ "tar", 2, 3, 0, import_tar },
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{ "raw", 2, 3, 0, import_raw },
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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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ignore_signals(SIGPIPE, -1);
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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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