mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 08:26:52 +03:00
baaa35ad70
Ideally, coccinelle would strip unnecessary braces too. But I do not see any option in coccinelle for this, so instead, I edited the patch text using search&replace to remove the braces. Unfortunately this is not fully automatic, in particular it didn't deal well with if-else-if-else blocks and ifdefs, so there is an increased likelikehood be some bugs in such spots. I also removed part of the patch that coccinelle generated for udev, where we returns -1 for failure. This should be fixed independently.
283 lines
9.7 KiB
C
283 lines
9.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <getopt.h>
|
|
|
|
#include "architecture.h"
|
|
#include "dissect-image.h"
|
|
#include "hexdecoct.h"
|
|
#include "log.h"
|
|
#include "loop-util.h"
|
|
#include "main-func.h"
|
|
#include "string-util.h"
|
|
#include "strv.h"
|
|
#include "user-util.h"
|
|
#include "util.h"
|
|
|
|
static enum {
|
|
ACTION_DISSECT,
|
|
ACTION_MOUNT,
|
|
} arg_action = ACTION_DISSECT;
|
|
static const char *arg_image = NULL;
|
|
static const char *arg_path = NULL;
|
|
static DissectImageFlags arg_flags = DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_DISCARD_ON_LOOP;
|
|
static void *arg_root_hash = NULL;
|
|
static size_t arg_root_hash_size = 0;
|
|
|
|
STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep);
|
|
|
|
static void help(void) {
|
|
printf("%s [OPTIONS...] IMAGE\n"
|
|
"%s [OPTIONS...] --mount IMAGE PATH\n"
|
|
"Dissect a file system OS image.\n\n"
|
|
" -h --help Show this help\n"
|
|
" --version Show package version\n"
|
|
" -m --mount Mount the image to the specified directory\n"
|
|
" -r --read-only Mount read-only\n"
|
|
" --discard=MODE Choose 'discard' mode (disabled, loop, all, crypto)\n"
|
|
" --root-hash=HASH Specify root hash for verity\n",
|
|
program_invocation_short_name,
|
|
program_invocation_short_name);
|
|
}
|
|
|
|
static int parse_argv(int argc, char *argv[]) {
|
|
|
|
enum {
|
|
ARG_VERSION = 0x100,
|
|
ARG_DISCARD,
|
|
ARG_ROOT_HASH,
|
|
};
|
|
|
|
static const struct option options[] = {
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "version", no_argument, NULL, ARG_VERSION },
|
|
{ "mount", no_argument, NULL, 'm' },
|
|
{ "read-only", no_argument, NULL, 'r' },
|
|
{ "discard", required_argument, NULL, ARG_DISCARD },
|
|
{ "root-hash", required_argument, NULL, ARG_ROOT_HASH },
|
|
{}
|
|
};
|
|
|
|
int c, r;
|
|
|
|
assert(argc >= 0);
|
|
assert(argv);
|
|
|
|
while ((c = getopt_long(argc, argv, "hmr", options, NULL)) >= 0) {
|
|
|
|
switch (c) {
|
|
|
|
case 'h':
|
|
help();
|
|
return 0;
|
|
|
|
case ARG_VERSION:
|
|
return version();
|
|
|
|
case 'm':
|
|
arg_action = ACTION_MOUNT;
|
|
break;
|
|
|
|
case 'r':
|
|
arg_flags |= DISSECT_IMAGE_READ_ONLY;
|
|
break;
|
|
|
|
case ARG_DISCARD: {
|
|
DissectImageFlags flags;
|
|
|
|
if (streq(optarg, "disabled"))
|
|
flags = 0;
|
|
else if (streq(optarg, "loop"))
|
|
flags = DISSECT_IMAGE_DISCARD_ON_LOOP;
|
|
else if (streq(optarg, "all"))
|
|
flags = DISSECT_IMAGE_DISCARD_ON_LOOP | DISSECT_IMAGE_DISCARD;
|
|
else if (streq(optarg, "crypt"))
|
|
flags = DISSECT_IMAGE_DISCARD_ANY;
|
|
else
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Unknown --discard= parameter: %s",
|
|
optarg);
|
|
arg_flags = (arg_flags & ~DISSECT_IMAGE_DISCARD_ANY) | flags;
|
|
|
|
break;
|
|
}
|
|
|
|
case ARG_ROOT_HASH: {
|
|
void *p;
|
|
size_t l;
|
|
|
|
r = unhexmem(optarg, strlen(optarg), &p, &l);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse root hash '%s': %m", optarg);
|
|
if (l < sizeof(sd_id128_t)) {
|
|
log_error("Root hash must be at least 128bit long: %s", optarg);
|
|
free(p);
|
|
return -EINVAL;
|
|
}
|
|
|
|
free(arg_root_hash);
|
|
arg_root_hash = p;
|
|
arg_root_hash_size = l;
|
|
break;
|
|
}
|
|
|
|
case '?':
|
|
return -EINVAL;
|
|
|
|
default:
|
|
assert_not_reached("Unhandled option");
|
|
}
|
|
|
|
}
|
|
|
|
switch (arg_action) {
|
|
|
|
case ACTION_DISSECT:
|
|
if (optind + 1 != argc)
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"Expected a file path as only argument.");
|
|
|
|
arg_image = argv[optind];
|
|
arg_flags |= DISSECT_IMAGE_READ_ONLY;
|
|
break;
|
|
|
|
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.");
|
|
|
|
arg_image = argv[optind];
|
|
arg_path = argv[optind + 1];
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Unknown action.");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int run(int argc, char *argv[]) {
|
|
_cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
|
|
_cleanup_(decrypted_image_unrefp) DecryptedImage *di = NULL;
|
|
_cleanup_(dissected_image_unrefp) DissectedImage *m = NULL;
|
|
int r;
|
|
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
r = parse_argv(argc, argv);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
r = loop_device_make_by_path(arg_image, (arg_flags & DISSECT_IMAGE_READ_ONLY) ? O_RDONLY : O_RDWR, &d);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to set up loopback device: %m");
|
|
|
|
if (!arg_root_hash) {
|
|
r = root_hash_load(arg_image, &arg_root_hash, &arg_root_hash_size);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to read root hash file for %s: %m", arg_image);
|
|
}
|
|
|
|
r = dissect_image_and_warn(d->fd, arg_image, arg_root_hash, arg_root_hash_size, arg_flags, &m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
switch (arg_action) {
|
|
|
|
case ACTION_DISSECT: {
|
|
unsigned i;
|
|
|
|
for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) {
|
|
DissectedPartition *p = m->partitions + i;
|
|
int k;
|
|
|
|
if (!p->found)
|
|
continue;
|
|
|
|
printf("Found %s '%s' partition",
|
|
p->rw ? "writable" : "read-only",
|
|
partition_designator_to_string(i));
|
|
|
|
if (!sd_id128_is_null(p->uuid))
|
|
printf(" (UUID " SD_ID128_FORMAT_STR ")", SD_ID128_FORMAT_VAL(p->uuid));
|
|
|
|
if (p->fstype)
|
|
printf(" of type %s", p->fstype);
|
|
|
|
if (p->architecture != _ARCHITECTURE_INVALID)
|
|
printf(" for %s", architecture_to_string(p->architecture));
|
|
|
|
k = PARTITION_VERITY_OF(i);
|
|
if (k >= 0)
|
|
printf(" %s verity", m->partitions[k].found ? "with" : "without");
|
|
|
|
if (p->partno >= 0)
|
|
printf(" on partition #%i", p->partno);
|
|
|
|
if (p->node)
|
|
printf(" (%s)", p->node);
|
|
|
|
putchar('\n');
|
|
}
|
|
|
|
r = dissected_image_acquire_metadata(m);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to acquire image metadata: %m");
|
|
|
|
if (m->hostname)
|
|
printf(" Hostname: %s\n", m->hostname);
|
|
|
|
if (!sd_id128_is_null(m->machine_id))
|
|
printf("Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(m->machine_id));
|
|
|
|
if (!strv_isempty(m->machine_info)) {
|
|
char **p, **q;
|
|
|
|
STRV_FOREACH_PAIR(p, q, m->machine_info)
|
|
printf("%s %s=%s\n",
|
|
p == m->machine_info ? "Mach. Info:" : " ",
|
|
*p, *q);
|
|
}
|
|
|
|
if (!strv_isempty(m->os_release)) {
|
|
char **p, **q;
|
|
|
|
STRV_FOREACH_PAIR(p, q, m->os_release)
|
|
printf("%s %s=%s\n",
|
|
p == m->os_release ? "OS Release:" : " ",
|
|
*p, *q);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case ACTION_MOUNT:
|
|
r = dissected_image_decrypt_interactively(m, NULL, arg_root_hash, arg_root_hash_size, arg_flags, &di);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dissected_image_mount(m, arg_path, UID_INVALID, arg_flags);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to mount image: %m");
|
|
|
|
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);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Unknown action.");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_MAIN_FUNCTION(run);
|