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817062e6211e7559ff91bcb7bb5dc4e472fc1646
systemd/src/import/export.c
T
Lennart Poettering 8f20b498bd importd: validate local image names with the right helper 
A while back we introduced image_name_is_valid() for validating image
file names. It's more liberal than hostname_is_valid() in many ways (and
allows version suffixes and such). Since importd deals in offline images
(as opposed to machined otherwise which deals in running machines),
let's hence use the right helper to validate the identifiers.
2024-03-01 22:25:42 +01:00

304 lines
9.8 KiB
C
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <locale.h>
#include "sd-event.h"
#include "sd-id128.h"
#include "alloc-util.h"
#include "build.h"
#include "discover-image.h"
#include "export-raw.h"
#include "export-tar.h"
#include "fd-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "import-common.h"
#include "import-util.h"
#include "main-func.h"
#include "signal-util.h"
#include "string-util.h"
#include "terminal-util.h"
#include "verbs.h"
static ImportCompressType arg_compress = IMPORT_COMPRESS_UNKNOWN;
static ImageClass arg_class = IMAGE_MACHINE;
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 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 = -EBADF;
int r, fd;
local = argv[1];
if (image_name_is_valid(local)) {
r = image_find(arg_class, local, NULL, &image);
if (r == -ENOENT)
return log_error_errno(r, "Image %s not found.", local);
if (r < 0)
return log_error_errno(r, "Failed to look for image %s: %m", local);
local = image->path;
} else
local = argv[1];
if (argc >= 3)
path = argv[2];
path = empty_or_dash_to_null(path);
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 = import_allocate_event_with_signals(&event);
if (r < 0)
return r;
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 = -EBADF;
int r, fd;
local = argv[1];
if (image_name_is_valid(local)) {
r = image_find(arg_class, local, NULL, &image);
if (r == -ENOENT)
return log_error_errno(r, "Image %s not found.", local);
if (r < 0)
return log_error_errno(r, "Failed to look for image %s: %m", local);
local = image->path;
} else
local = argv[1];
if (argc >= 3)
path = argv[2];
path = empty_or_dash_to_null(path);
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 = import_allocate_event_with_signals(&event);
if (r < 0)
return r;
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("%1$s [OPTIONS...] {COMMAND} ...\n"
"\n%4$sExport disk images.%5$s\n"
"\n%2$sCommands:%3$s\n"
" tar NAME [FILE] Export a TAR image\n"
" raw NAME [FILE] Export a RAW image\n"
"\n%2$sOptions:%3$s\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --format=FORMAT Select format\n"
" --class=CLASS Select image class (machine, sysext, confext,\n"
" portable)\n",
program_invocation_short_name,
ansi_underline(),
ansi_normal(),
ansi_highlight(),
ansi_normal());
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_FORMAT,
ARG_CLASS,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "format", required_argument, NULL, ARG_FORMAT },
{ "class", required_argument, NULL, ARG_CLASS },
{}
};
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 ARG_CLASS:
arg_class = image_class_from_string(optarg);
if (arg_class < 0)
return log_error_errno(arg_class, "Failed to parse --class= argument: %s", optarg);
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
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_setup();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
(void) ignore_signals(SIGPIPE);
return export_main(argc, argv);
}
DEFINE_MAIN_FUNCTION(run);
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