#include <stdio.h>
#include "architecture.h"
+#include "copy.h"
#include "dissect-image.h"
+#include "fd-util.h"
+#include "fs-util.h"
#include "hexdecoct.h"
#include "log.h"
#include "loop-util.h"
#include "main-func.h"
+#include "mkdir.h"
+#include "mount-util.h"
+#include "namespace-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "pretty-print.h"
+#include "stat-util.h"
#include "string-util.h"
#include "strv.h"
#include "terminal-util.h"
+#include "tmpfile-util.h"
#include "user-util.h"
#include "util.h"
static enum {
ACTION_DISSECT,
ACTION_MOUNT,
+ ACTION_COPY_FROM,
+ ACTION_COPY_TO,
} arg_action = ACTION_DISSECT;
static const char *arg_image = NULL;
static const char *arg_path = NULL;
+static const char *arg_source = NULL;
+static const char *arg_target = NULL;
static DissectImageFlags arg_flags = DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_DISCARD_ON_LOOP|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK;
static void *arg_root_hash = NULL;
static char *arg_verity_data = NULL;
return log_oom();
printf("%1$s [OPTIONS...] IMAGE\n"
- "%1$s [OPTIONS...] --mount IMAGE PATH\n\n"
+ "%1$s [OPTIONS...] --mount IMAGE PATH\n"
+ "%1$s [OPTIONS...] --copy-from IMAGE PATH [TARGET]\n"
+ "%1$s [OPTIONS...] --copy-to IMAGE [SOURCE] PATH\n\n"
"%5$sDissect a file system OS image.%6$s\n\n"
"%3$sOptions:%4$s\n"
" -r --read-only Mount read-only\n"
" --version Show package version\n"
" -m --mount Mount the image to the specified directory\n"
" -M Shortcut for --mount --mkdir\n"
+ " -x --copy-from Copy files from image to host\n"
+ " -a --copy-to Copy files from host to image\n"
"\nSee the %2$s for details.\n"
, program_invocation_short_name
, link
{ "verity-data", required_argument, NULL, ARG_VERITY_DATA },
{ "root-hash-sig", required_argument, NULL, ARG_ROOT_HASH_SIG },
{ "mkdir", no_argument, NULL, ARG_MKDIR },
+ { "copy-from", no_argument, NULL, 'x' },
+ { "copy-to", no_argument, NULL, 'a' },
{}
};
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hmrM", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "hmrMxa", options, NULL)) >= 0) {
switch (c) {
arg_flags |= DISSECT_IMAGE_MKDIR;
break;
+ case 'x':
+ arg_action = ACTION_COPY_FROM;
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case 'a':
+ arg_action = ACTION_COPY_TO;
+ break;
+
case 'r':
arg_flags |= DISSECT_IMAGE_READ_ONLY;
break;
case ACTION_DISSECT:
if (optind + 1 != argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
- "Expected a file path as only argument.");
+ "Expected an image file path as only argument.");
arg_image = argv[optind];
arg_flags |= DISSECT_IMAGE_READ_ONLY;
case ACTION_MOUNT:
if (optind + 2 != argc)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
- "Expected a file path and mount point path as only arguments.");
+ "Expected an image file path and mount point path as only arguments.");
arg_image = argv[optind];
arg_path = argv[optind + 1];
break;
+ case ACTION_COPY_FROM:
+ if (argc < optind + 2 || argc > optind + 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path, a source path and an optional destination path as only arguments.");
+
+ arg_image = argv[optind];
+ arg_source = argv[optind + 1];
+ arg_target = argc > optind + 2 ? argv[optind + 2] : "-" /* this means stdout */ ;
+
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case ACTION_COPY_TO:
+ if (argc < optind + 2 || argc > optind + 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path, an optional source path and a destination path as only arguments.");
+
+ arg_image = argv[optind];
+
+ if (argc > optind + 2) {
+ arg_source = argv[optind + 1];
+ arg_target = argv[optind + 2];
+ } else {
+ arg_source = "-"; /* this means stdin */
+ arg_target = argv[optind + 1];
+ }
+
+ break;
+
default:
assert_not_reached("Unknown action.");
}
}
case ACTION_MOUNT:
- r = dissected_image_decrypt_interactively(m, NULL, arg_root_hash, arg_root_hash_size, arg_verity_data, arg_root_hash_sig_path, arg_root_hash_sig, arg_root_hash_sig_size, arg_flags, &di);
+ r = dissected_image_decrypt_interactively(
+ m, NULL,
+ arg_root_hash, arg_root_hash_size,
+ arg_verity_data,
+ arg_root_hash_sig_path, arg_root_hash_sig, arg_root_hash_sig_size,
+ arg_flags,
+ &di);
if (r < 0)
return r;
loop_device_relinquish(d);
break;
+ case ACTION_COPY_FROM:
+ case ACTION_COPY_TO: {
+ _cleanup_(umount_and_rmdir_and_freep) char *mounted_dir = NULL;
+ _cleanup_(rmdir_and_freep) char *created_dir = NULL;
+ _cleanup_free_ char *temp = NULL;
+
+ r = dissected_image_decrypt_interactively(
+ m, NULL,
+ arg_root_hash, arg_root_hash_size,
+ arg_verity_data,
+ arg_root_hash_sig_path, arg_root_hash_sig, arg_root_hash_sig_size,
+ arg_flags,
+ &di);
+ if (r < 0)
+ return r;
+
+ r = detach_mount_namespace();
+ if (r < 0)
+ return log_error_errno(r, "Failed to detach mount namespace: %m");
+
+ r = tempfn_random_child(NULL, program_invocation_short_name, &temp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate temporary mount directory: %m");
+
+ r = mkdir_p(temp, 0700);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create mount point: %m");
+
+ created_dir = TAKE_PTR(temp);
+
+ r = dissected_image_mount(m, created_dir, UID_INVALID, arg_flags);
+ if (r == -EUCLEAN)
+ return log_error_errno(r, "File system check on image failed: %m");
+ if (r < 0)
+ return log_error_errno(r, "Failed to mount image: %m");
+
+ mounted_dir = TAKE_PTR(created_dir);
+
+ if (di) {
+ r = decrypted_image_relinquish(di);
+ if (r < 0)
+ return log_error_errno(r, "Failed to relinquish DM devices: %m");
+ }
+
+ loop_device_relinquish(d);
+
+ if (arg_action == ACTION_COPY_FROM) {
+ _cleanup_close_ int source_fd = -1, target_fd = -1;
+
+ source_fd = chase_symlinks_and_open(arg_source, mounted_dir, CHASE_PREFIX_ROOT|CHASE_WARN, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL);
+ if (source_fd < 0)
+ return log_error_errno(source_fd, "Failed to open source path '%s' in image '%s': %m", arg_source, arg_image);
+
+ /* Copying to stdout? */
+ if (streq(arg_target, "-")) {
+ r = copy_bytes(source_fd, STDOUT_FILENO, (uint64_t) -1, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from %s in mage '%s' to stdout: %m", arg_source, arg_image);
+
+ /* When we copy to stdou we don't copy any attributes (i.e. no access mode, no ownership, no xattr, no times) */
+ break;
+ }
+
+ /* Try to copy as directory? */
+ r = copy_directory_fd(source_fd, arg_target, COPY_REFLINK|COPY_MERGE_EMPTY|COPY_SIGINT);
+ if (r >= 0)
+ break;
+ if (r != -ENOTDIR)
+ return log_error_errno(r, "Failed to copy %s in image '%s' to '%s': %m", arg_source, arg_image, arg_target);
+
+ r = fd_verify_regular(source_fd);
+ if (r == -EISDIR)
+ return log_error_errno(r, "Target '%s' exists already and is not a directory.", arg_target);
+ if (r < 0)
+ return log_error_errno(r, "Source path %s in image '%s' is neither regular file nor directory, refusing: %m", arg_source, arg_image);
+
+ /* Nah, it's a plain file! */
+ target_fd = open(arg_target, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to create regular file at target path '%s': %m", arg_target);
+
+ r = copy_bytes(source_fd, target_fd, (uint64_t) -1, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from %s in mage '%s' to '%s': %m", arg_source, arg_image, arg_target);
+
+ (void) copy_xattr(source_fd, target_fd);
+ (void) copy_access(source_fd, target_fd);
+ (void) copy_times(source_fd, target_fd, 0);
+
+ /* When this is a regular file we don't copy ownership! */
+
+ } else {
+ _cleanup_close_ int source_fd = -1, target_fd = -1;
+ _cleanup_close_ int dfd = -1;
+ _cleanup_free_ char *dn = NULL;
+
+ assert(arg_action == ACTION_COPY_TO);
+
+ dn = dirname_malloc(arg_target);
+ if (!dn)
+ return log_oom();
+
+ r = chase_symlinks(dn, mounted_dir, CHASE_PREFIX_ROOT|CHASE_WARN, NULL, &dfd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to open '%s': %m", dn);
+
+ /* Are we reading from stdin? */
+ if (streq(arg_source, "-")) {
+ target_fd = openat(dfd, basename(arg_target), O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_EXCL, 0644);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to open target file '%s': %m", arg_target);
+
+ r = copy_bytes(STDIN_FILENO, target_fd, (uint64_t) -1, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from stdin to '%s' in image '%s': %m", arg_target, arg_image);
+
+ /* When we copy from stdin we don't copy any attributes (i.e. no access mode, no ownership, no xattr, no times) */
+ break;
+ }
+
+ source_fd = open(arg_source, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (source_fd < 0)
+ return log_error_errno(source_fd, "Failed to open source path '%s': %m", arg_source);
+
+ r = fd_verify_regular(source_fd);
+ if (r < 0) {
+ if (r != -EISDIR)
+ return log_error_errno(r, "Source '%s' is neither regular file nor directory: %m", arg_source);
+
+ /* We are looking at a directory. */
+
+ target_fd = openat(dfd, basename(arg_target), O_RDONLY|O_DIRECTORY|O_CLOEXEC);
+ if (target_fd < 0) {
+ if (errno != ENOENT)
+ return log_error_errno(errno, "Failed to open destination '%s': %m", arg_target);
+
+ r = copy_tree_at(source_fd, ".", dfd, basename(arg_target), UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_SIGINT);
+ } else
+ r = copy_tree_at(source_fd, ".", target_fd, ".", UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_SIGINT);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy '%s' to '%s' in image '%s': %m", arg_source, arg_target, arg_image);
+
+ break;
+ }
+
+ /* We area looking at a regular file */
+ target_fd = openat(dfd, basename(arg_target), O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_EXCL, 0600);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to open target file '%s': %m", arg_target);
+
+ r = copy_bytes(source_fd, target_fd, (uint64_t) -1, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from '%s' to '%s' in image '%s': %m", arg_source, arg_target, arg_image);
+
+ (void) copy_xattr(source_fd, target_fd);
+ (void) copy_access(source_fd, target_fd);
+ (void) copy_times(source_fd, target_fd, 0);
+
+ /* When this is a regular file we don't copy ownership! */
+ }
+
+ break;
+ }
+
default:
assert_not_reached("Unknown action.");
}
projects / thirdparty / systemd.git / commitdiff
