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-rw-r--r--src/grp-machine/grp-import/systemd-export/export.c321
1 files changed, 321 insertions, 0 deletions
diff --git a/src/grp-machine/grp-import/systemd-export/export.c b/src/grp-machine/grp-import/systemd-export/export.c
new file mode 100644
index 0000000000..a07273da7c
--- /dev/null
+++ b/src/grp-machine/grp-import/systemd-export/export.c
@@ -0,0 +1,321 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2015 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 <systemd/sd-event.h>
+
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/hostname-util.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/verbs.h"
+#include "systemd-shared/import-util.h"
+#include "systemd-shared/machine-image.h"
+
+#include "export-raw.h"
+#include "export-tar.h"
+
+static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
+
+static void determine_compression_from_filename(const char *p) {
+
+ if (arg_compress != IMPORT_COMPRESS_UNKNOWN)
+ return;
+
+ if (!p) {
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+ return;
+ }
+
+ if (endswith(p, ".xz"))
+ arg_compress = IMPORT_COMPRESS_XZ;
+ else if (endswith(p, ".gz"))
+ arg_compress = IMPORT_COMPRESS_GZIP;
+ else if (endswith(p, ".bz2"))
+ arg_compress = IMPORT_COMPRESS_BZIP2;
+ else
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+}
+
+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(TarExport *export, int error, void *userdata) {
+ sd_event *event = userdata;
+ assert(export);
+
+ if (error == 0)
+ log_info("Operation completed successfully.");
+
+ sd_event_exit(event, abs(error));
+}
+
+static int export_tar(int argc, char *argv[], void *userdata) {
+ _cleanup_(tar_export_unrefp) TarExport *export = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ _cleanup_(image_unrefp) Image *image = NULL;
+ const char *path = NULL, *local = NULL;
+ _cleanup_close_ int open_fd = -1;
+ int r, fd;
+
+ if (machine_name_is_valid(argv[1])) {
+ r = image_find(argv[1], &image);
+ if (r < 0)
+ return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
+ if (r == 0) {
+ log_error("Machine image %s not found.", argv[1]);
+ return -ENOENT;
+ }
+
+ local = image->path;
+ } else
+ local = argv[1];
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ determine_compression_from_filename(path);
+
+ if (path) {
+ open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (open_fd < 0)
+ return log_error_errno(errno, "Failed to open tar image for export: %m");
+
+ fd = open_fd;
+
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
+ } else {
+ _cleanup_free_ char *pretty = NULL;
+
+ fd = STDOUT_FILENO;
+
+ (void) readlink_malloc("/proc/self/fd/1", &pretty);
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
+ }
+
+ 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_export_new(&export, event, on_tar_finished, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate exporter: %m");
+
+ r = tar_export_start(export, local, fd, arg_compress);
+ if (r < 0)
+ return log_error_errno(r, "Failed to export 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(RawExport *export, int error, void *userdata) {
+ sd_event *event = userdata;
+ assert(export);
+
+ if (error == 0)
+ log_info("Operation completed successfully.");
+
+ sd_event_exit(event, abs(error));
+}
+
+static int export_raw(int argc, char *argv[], void *userdata) {
+ _cleanup_(raw_export_unrefp) RawExport *export = NULL;
+ _cleanup_(sd_event_unrefp) sd_event *event = NULL;
+ _cleanup_(image_unrefp) Image *image = NULL;
+ const char *path = NULL, *local = NULL;
+ _cleanup_close_ int open_fd = -1;
+ int r, fd;
+
+ if (machine_name_is_valid(argv[1])) {
+ r = image_find(argv[1], &image);
+ if (r < 0)
+ return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
+ if (r == 0) {
+ log_error("Machine image %s not found.", argv[1]);
+ return -ENOENT;
+ }
+
+ local = image->path;
+ } else
+ local = argv[1];
+
+ if (argc >= 3)
+ path = argv[2];
+ if (isempty(path) || streq(path, "-"))
+ path = NULL;
+
+ determine_compression_from_filename(path);
+
+ if (path) {
+ open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
+ if (open_fd < 0)
+ return log_error_errno(errno, "Failed to open raw image for export: %m");
+
+ fd = open_fd;
+
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
+ } else {
+ _cleanup_free_ char *pretty = NULL;
+
+ fd = STDOUT_FILENO;
+
+ (void) readlink_malloc("/proc/self/fd/1", &pretty);
+ log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
+ }
+
+ 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_export_new(&export, event, on_raw_finished, event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate exporter: %m");
+
+ r = raw_export_start(export, local, fd, arg_compress);
+ if (r < 0)
+ return log_error_errno(r, "Failed to export 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"
+ "Export container or virtual machine images.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --format=FORMAT Select format\n\n"
+ "Commands:\n"
+ " tar NAME [FILE] Export a TAR image\n"
+ " raw NAME [FILE] Export a RAW image\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_FORMAT,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "format", required_argument, NULL, ARG_FORMAT },
+ {}
+ };
+
+ 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:
+ return version();
+
+ case ARG_FORMAT:
+ if (streq(optarg, "uncompressed"))
+ arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
+ else if (streq(optarg, "xz"))
+ arg_compress = IMPORT_COMPRESS_XZ;
+ else if (streq(optarg, "gzip"))
+ arg_compress = IMPORT_COMPRESS_GZIP;
+ else if (streq(optarg, "bzip2"))
+ arg_compress = IMPORT_COMPRESS_BZIP2;
+ else {
+ log_error("Unknown format: %s", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ return 1;
+}
+
+static int export_main(int argc, char *argv[]) {
+
+ static const Verb verbs[] = {
+ { "help", VERB_ANY, VERB_ANY, 0, help },
+ { "tar", 2, 3, 0, export_tar },
+ { "raw", 2, 3, 0, export_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 = export_main(argc, argv);
+
+finish:
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
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