b26fa1a2fb
This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.
321 lines
11 KiB
C
321 lines
11 KiB
C
/***
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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 "alloc-util.h"
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#include "export-raw.h"
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#include "export-tar.h"
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#include "fd-util.h"
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#include "fs-util.h"
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#include "hostname-util.h"
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#include "import-util.h"
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#include "machine-image.h"
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#include "signal-util.h"
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#include "string-util.h"
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#include "verbs.h"
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static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
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static void determine_compression_from_filename(const char *p) {
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if (arg_compress != IMPORT_COMPRESS_UNKNOWN)
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return;
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if (!p) {
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arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
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return;
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}
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if (endswith(p, ".xz"))
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arg_compress = IMPORT_COMPRESS_XZ;
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else if (endswith(p, ".gz"))
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arg_compress = IMPORT_COMPRESS_GZIP;
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else if (endswith(p, ".bz2"))
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arg_compress = IMPORT_COMPRESS_BZIP2;
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else
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arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
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}
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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(TarExport *export, int error, void *userdata) {
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sd_event *event = userdata;
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assert(export);
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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 export_tar(int argc, char *argv[], void *userdata) {
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_cleanup_(tar_export_unrefp) TarExport *export = NULL;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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_cleanup_(image_unrefp) Image *image = NULL;
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const char *path = NULL, *local = NULL;
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_cleanup_close_ int open_fd = -1;
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int r, fd;
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if (machine_name_is_valid(argv[1])) {
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r = image_find(argv[1], &image);
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if (r < 0)
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return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
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if (r == 0) {
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log_error("Machine image %s not found.", argv[1]);
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return -ENOENT;
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}
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local = image->path;
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} else
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local = argv[1];
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if (argc >= 3)
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path = argv[2];
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if (isempty(path) || streq(path, "-"))
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path = NULL;
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determine_compression_from_filename(path);
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if (path) {
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open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
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if (open_fd < 0)
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return log_error_errno(errno, "Failed to open tar image for export: %m");
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fd = open_fd;
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log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
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} else {
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_cleanup_free_ char *pretty = NULL;
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fd = STDOUT_FILENO;
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(void) readlink_malloc("/proc/self/fd/1", &pretty);
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log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
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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, NULL, SIGTERM, SIGINT, -1) >= 0);
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(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
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(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
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r = tar_export_new(&export, event, on_tar_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate exporter: %m");
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r = tar_export_start(export, local, fd, arg_compress);
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if (r < 0)
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return log_error_errno(r, "Failed to export 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(RawExport *export, int error, void *userdata) {
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sd_event *event = userdata;
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assert(export);
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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 export_raw(int argc, char *argv[], void *userdata) {
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_cleanup_(raw_export_unrefp) RawExport *export = NULL;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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_cleanup_(image_unrefp) Image *image = NULL;
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const char *path = NULL, *local = NULL;
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_cleanup_close_ int open_fd = -1;
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int r, fd;
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if (machine_name_is_valid(argv[1])) {
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r = image_find(argv[1], &image);
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if (r < 0)
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return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
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if (r == 0) {
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log_error("Machine image %s not found.", argv[1]);
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return -ENOENT;
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}
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local = image->path;
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} else
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local = argv[1];
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if (argc >= 3)
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path = argv[2];
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if (isempty(path) || streq(path, "-"))
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path = NULL;
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determine_compression_from_filename(path);
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if (path) {
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open_fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC|O_NOCTTY, 0666);
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if (open_fd < 0)
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return log_error_errno(errno, "Failed to open raw image for export: %m");
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fd = open_fd;
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log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
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} else {
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_cleanup_free_ char *pretty = NULL;
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fd = STDOUT_FILENO;
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(void) readlink_malloc("/proc/self/fd/1", &pretty);
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log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
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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, NULL, SIGTERM, SIGINT, -1) >= 0);
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(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
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(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
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r = raw_export_new(&export, event, on_raw_finished, event);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate exporter: %m");
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r = raw_export_start(export, local, fd, arg_compress);
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if (r < 0)
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return log_error_errno(r, "Failed to export 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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"Export container or virtual machine images.\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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" --format=FORMAT Select format\n\n"
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"Commands:\n"
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" tar NAME [FILE] Export a TAR image\n"
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" raw NAME [FILE] Export 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_FORMAT,
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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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{ "format", required_argument, NULL, ARG_FORMAT },
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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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return version();
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case ARG_FORMAT:
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if (streq(optarg, "uncompressed"))
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arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
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else if (streq(optarg, "xz"))
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arg_compress = IMPORT_COMPRESS_XZ;
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else if (streq(optarg, "gzip"))
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arg_compress = IMPORT_COMPRESS_GZIP;
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else if (streq(optarg, "bzip2"))
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arg_compress = IMPORT_COMPRESS_BZIP2;
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else {
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log_error("Unknown format: %s", optarg);
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return -EINVAL;
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}
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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 export_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, export_tar },
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{ "raw", 2, 3, 0, export_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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(void) ignore_signals(SIGPIPE, -1);
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r = export_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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