[systemd.git] / src / import / export.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <getopt.h>

#include "sd-event.h"
#include "sd-id128.h"

#include "alloc-util.h"
#include "export-raw.h"
#include "export-tar.h"
#include "fd-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "import-util.h"
#include "machine-image.h"
#include "main-func.h"
#include "signal-util.h"
#include "string-util.h"
#include "verbs.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(IMAGE_MACHINE, argv[1], &image);
                if (r == -ENOENT)
                        return log_error_errno(r, "Machine image %s not found.", argv[1]);
                if (r < 0)
                        return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);

                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) fd_get_path(fd, &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(IMAGE_MACHINE, argv[1], &image);
                if (r == -ENOENT)
                        return log_error_errno(r, "Machine image %s not found.", argv[1]);
                if (r < 0)
                        return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);

                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) fd_get_path(fd, &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
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Unknown format: %s", optarg);
                        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);
}

static int run(int argc, char *argv[]) {
        int r;

        setlocale(LC_ALL, "");
        log_parse_environment();
        log_open();

        r = parse_argv(argc, argv);
        if (r <= 0)
                return r;

        (void) ignore_signals(SIGPIPE, -1);

        return export_main(argc, argv);
}

DEFINE_MAIN_FUNCTION(run);
Commit	Line	Data
52ad194e	1	/* SPDX-License-Identifier: LGPL-2.1+ */
e3bff60a MP	2
	3	#include <getopt.h>
	4
	5	#include "sd-event.h"
1d42b86d	6	#include "sd-id128.h"
6300502b	7
db2df898	8	#include "alloc-util.h"
6300502b MP	9	#include "export-raw.h"
6300502b MP	10	#include "export-tar.h"
db2df898 MP	11	#include "fd-util.h"
db2df898 MP	12	#include "fs-util.h"
13d276d0	13	#include "hostname-util.h"
e3bff60a	14	#include "import-util.h"
6300502b	15	#include "machine-image.h"
6e866b33	16	#include "main-func.h"
6300502b	17	#include "signal-util.h"
db2df898	18	#include "string-util.h"
6300502b	19	#include "verbs.h"
e3bff60a MP	20
	21	static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
	22
	23	static void determine_compression_from_filename(const char *p) {
	24
	25	if (arg_compress != IMPORT_COMPRESS_UNKNOWN)
	26	return;
	27
	28	if (!p) {
	29	arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
	30	return;
	31	}
	32
	33	if (endswith(p, ".xz"))
	34	arg_compress = IMPORT_COMPRESS_XZ;
	35	else if (endswith(p, ".gz"))
	36	arg_compress = IMPORT_COMPRESS_GZIP;
	37	else if (endswith(p, ".bz2"))
	38	arg_compress = IMPORT_COMPRESS_BZIP2;
	39	else
	40	arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
	41	}
	42
	43	static int interrupt_signal_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
	44	log_notice("Transfer aborted.");
	45	sd_event_exit(sd_event_source_get_event(s), EINTR);
	46	return 0;
	47	}
	48
	49	static void on_tar_finished(TarExport export, int error, void userdata) {
	50	sd_event *event = userdata;
	51	assert(export);
	52
	53	if (error == 0)
	54	log_info("Operation completed successfully.");
	55
	56	sd_event_exit(event, abs(error));
	57	}
	58
	59	static int export_tar(int argc, char argv[], void userdata) {
	60	_cleanup_(tar_export_unrefp) TarExport *export = NULL;
4c89c718	61	_cleanup_(sd_event_unrefp) sd_event *event = NULL;
e3bff60a MP	62	_cleanup_(image_unrefp) Image *image = NULL;
	63	const char path = NULL, local = NULL;
	64	_cleanup_close_ int open_fd = -1;
	65	int r, fd;
	66
	67	if (machine_name_is_valid(argv[1])) {
b012e921 MB	68	r = image_find(IMAGE_MACHINE, argv[1], &image);
	69	if (r == -ENOENT)
	70	return log_error_errno(r, "Machine image %s not found.", argv[1]);
e3bff60a MP	71	if (r < 0)
e3bff60a MP	72	return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
e3bff60a MP	73
	74	local = image->path;
	75	} else
	76	local = argv[1];
	77
	78	if (argc >= 3)
	79	path = argv[2];
	80	if (isempty(path) \|\| streq(path, "-"))
	81	path = NULL;
	82
	83	determine_compression_from_filename(path);
	84
	85	if (path) {
	86	open_fd = open(path, O_WRONLY\|O_CREAT\|O_TRUNC\|O_CLOEXEC\|O_NOCTTY, 0666);
	87	if (open_fd < 0)
	88	return log_error_errno(errno, "Failed to open tar image for export: %m");
	89
	90	fd = open_fd;
	91
	92	log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
	93	} else {
	94	_cleanup_free_ char *pretty = NULL;
	95
	96	fd = STDOUT_FILENO;
	97
6e866b33	98	(void) fd_get_path(fd, &pretty);
e3bff60a MP	99	log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
	100	}
	101
	102	r = sd_event_default(&event);
	103	if (r < 0)
	104	return log_error_errno(r, "Failed to allocate event loop: %m");
	105
86f210e9 MP	106	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
	107	(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
	108	(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
e3bff60a MP	109
	110	r = tar_export_new(&export, event, on_tar_finished, event);
	111	if (r < 0)
	112	return log_error_errno(r, "Failed to allocate exporter: %m");
	113
	114	r = tar_export_start(export, local, fd, arg_compress);
	115	if (r < 0)
	116	return log_error_errno(r, "Failed to export image: %m");
	117
	118	r = sd_event_loop(event);
	119	if (r < 0)
	120	return log_error_errno(r, "Failed to run event loop: %m");
	121
	122	log_info("Exiting.");
	123	return -r;
	124	}
	125
	126	static void on_raw_finished(RawExport export, int error, void userdata) {
	127	sd_event *event = userdata;
	128	assert(export);
	129
	130	if (error == 0)
	131	log_info("Operation completed successfully.");
	132
	133	sd_event_exit(event, abs(error));
	134	}
	135
	136	static int export_raw(int argc, char argv[], void userdata) {
	137	_cleanup_(raw_export_unrefp) RawExport *export = NULL;
4c89c718	138	_cleanup_(sd_event_unrefp) sd_event *event = NULL;
e3bff60a MP	139	_cleanup_(image_unrefp) Image *image = NULL;
	140	const char path = NULL, local = NULL;
	141	_cleanup_close_ int open_fd = -1;
	142	int r, fd;
	143
	144	if (machine_name_is_valid(argv[1])) {
b012e921 MB	145	r = image_find(IMAGE_MACHINE, argv[1], &image);
	146	if (r == -ENOENT)
	147	return log_error_errno(r, "Machine image %s not found.", argv[1]);
e3bff60a MP	148	if (r < 0)
e3bff60a MP	149	return log_error_errno(r, "Failed to look for machine %s: %m", argv[1]);
e3bff60a MP	150
	151	local = image->path;
	152	} else
	153	local = argv[1];
	154
	155	if (argc >= 3)
	156	path = argv[2];
	157	if (isempty(path) \|\| streq(path, "-"))
	158	path = NULL;
	159
	160	determine_compression_from_filename(path);
	161
	162	if (path) {
	163	open_fd = open(path, O_WRONLY\|O_CREAT\|O_TRUNC\|O_CLOEXEC\|O_NOCTTY, 0666);
	164	if (open_fd < 0)
	165	return log_error_errno(errno, "Failed to open raw image for export: %m");
	166
	167	fd = open_fd;
	168
	169	log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, path, import_compress_type_to_string(arg_compress));
	170	} else {
	171	_cleanup_free_ char *pretty = NULL;
	172
	173	fd = STDOUT_FILENO;
	174
6e866b33	175	(void) fd_get_path(fd, &pretty);
e3bff60a MP	176	log_info("Exporting '%s', saving to '%s' with compression '%s'.", local, strna(pretty), import_compress_type_to_string(arg_compress));
	177	}
	178
	179	r = sd_event_default(&event);
	180	if (r < 0)
	181	return log_error_errno(r, "Failed to allocate event loop: %m");
	182
86f210e9 MP	183	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
	184	(void) sd_event_add_signal(event, NULL, SIGTERM, interrupt_signal_handler, NULL);
	185	(void) sd_event_add_signal(event, NULL, SIGINT, interrupt_signal_handler, NULL);
e3bff60a MP	186
	187	r = raw_export_new(&export, event, on_raw_finished, event);
	188	if (r < 0)
	189	return log_error_errno(r, "Failed to allocate exporter: %m");
	190
	191	r = raw_export_start(export, local, fd, arg_compress);
	192	if (r < 0)
	193	return log_error_errno(r, "Failed to export image: %m");
	194
	195	r = sd_event_loop(event);
	196	if (r < 0)
	197	return log_error_errno(r, "Failed to run event loop: %m");
	198
	199	log_info("Exiting.");
	200	return -r;
	201	}
	202
	203	static int help(int argc, char argv[], void userdata) {
	204
	205	printf("%s [OPTIONS...] {COMMAND} ...\n\n"
	206	"Export container or virtual machine images.\n\n"
	207	" -h --help Show this help\n"
	208	" --version Show package version\n"
	209	" --format=FORMAT Select format\n\n"
	210	"Commands:\n"
	211	" tar NAME [FILE] Export a TAR image\n"
	212	" raw NAME [FILE] Export a RAW image\n",
	213	program_invocation_short_name);
	214
	215	return 0;
	216	}
	217
	218	static int parse_argv(int argc, char *argv[]) {
	219
	220	enum {
	221	ARG_VERSION = 0x100,
	222	ARG_FORMAT,
	223	};
	224
	225	static const struct option options[] = {
	226	{ "help", no_argument, NULL, 'h' },
	227	{ "version", no_argument, NULL, ARG_VERSION },
	228	{ "format", required_argument, NULL, ARG_FORMAT },
	229	{}
	230	};
	231
	232	int c;
	233
	234	assert(argc >= 0);
	235	assert(argv);
	236
	237	while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
	238
	239	switch (c) {
	240
	241	case 'h':
	242	return help(0, NULL, NULL);
	243
	244	case ARG_VERSION:
6300502b	245	return version();
e3bff60a MP	246
	247	case ARG_FORMAT:
	248	if (streq(optarg, "uncompressed"))
	249	arg_compress = IMPORT_COMPRESS_UNCOMPRESSED;
	250	else if (streq(optarg, "xz"))
	251	arg_compress = IMPORT_COMPRESS_XZ;
	252	else if (streq(optarg, "gzip"))
	253	arg_compress = IMPORT_COMPRESS_GZIP;
	254	else if (streq(optarg, "bzip2"))
	255	arg_compress = IMPORT_COMPRESS_BZIP2;
6e866b33 MB	256	else
	257	return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
	258	"Unknown format: %s", optarg);
e3bff60a MP	259	break;
	260
	261	case '?':
	262	return -EINVAL;
	263
	264	default:
	265	assert_not_reached("Unhandled option");
	266	}
	267
	268	return 1;
	269	}
	270
	271	static int export_main(int argc, char *argv[]) {
e3bff60a MP	272	static const Verb verbs[] = {
	273	{ "help", VERB_ANY, VERB_ANY, 0, help },
	274	{ "tar", 2, 3, 0, export_tar },
	275	{ "raw", 2, 3, 0, export_raw },
	276	{}
	277	};
	278
	279	return dispatch_verb(argc, argv, verbs, NULL);
	280	}
	281
6e866b33	282	static int run(int argc, char *argv[]) {
e3bff60a MP	283	int r;
	284
	285	setlocale(LC_ALL, "");
	286	log_parse_environment();
	287	log_open();
	288
	289	r = parse_argv(argc, argv);
	290	if (r <= 0)
6e866b33	291	return r;
e3bff60a	292
86f210e9	293	(void) ignore_signals(SIGPIPE, -1);
e3bff60a	294
6e866b33	295	return export_main(argc, argv);
e3bff60a	296	}
6e866b33 MB	297
6e866b33 MB	298	DEFINE_MAIN_FUNCTION(run);