int main_update()
{
int current_version = -1, server_version = -1;
struct manifest *current_manifest = NULL, *server_manifest = NULL;
struct list *updates = NULL;
int ret;
int lock_fd;
int retries = 0;
int timeout = 10;
srand(time(NULL));
ret = swupd_init(&lock_fd);
if (ret != 0) {
/* being here means we already close log by a previously caught error */
printf("Updater failed to initialize, exiting now.\n");
return ret;
}
if (!check_network()) {
printf("Error: Network issue, unable to proceed with update\n");
ret = EXIT_FAILURE;
goto clean_curl;
}
printf("Update started.\n");
read_subscriptions_alt();
if (!signature_initialize(UPDATE_CA_CERTS_PATH "/" SIGNATURE_CA_CERT)) {
goto clean_curl;
}
/* Step 1: get versions */
ret = check_versions(¤t_version, &server_version, path_prefix);
if (ret < 0) {
goto clean_curl;
}
if (server_version <= current_version) {
printf("Version on server (%i) is not newer than system version (%i)\n", server_version, current_version);
ret = EXIT_SUCCESS;
goto clean_curl;
}
printf("Preparing to update from %i to %i\n", current_version, server_version);
/* Step 2: housekeeping */
if (rm_staging_dir_contents("download")) {
goto clean_curl;
}
load_current_manifests:
/* Step 3: setup manifests */
/* get the from/to MoM manifests */
printf("Querying current manifest.\n");
ret = load_manifests(current_version, current_version, "MoM", NULL, ¤t_manifest);
if (ret) {
/* TODO: possibly remove this as not getting a "from" manifest is not fatal
* - we just don't apply deltas */
if (retries < MAX_TRIES) {
increment_retries(&retries, &timeout);
printf("Retry #%d downloading from/to MoM Manifests\n", retries);
goto load_current_manifests;
}
printf("Failure retrieving manifest from server\n");
goto clean_exit;
}
/* Reset the retries and timeout for subsequent download calls */
retries = 0;
timeout = 10;
load_server_manifests:
printf("Querying server manifest.\n");
ret = load_manifests(current_version, server_version, "MoM", NULL, &server_manifest);
if (ret) {
if (retries < MAX_TRIES) {
increment_retries(&retries, &timeout);
printf("Retry #%d downloading server Manifests\n", retries);
goto load_server_manifests;
}
printf("Failure retrieving manifest from server\n");
goto clean_exit;
}
if (current_manifest == NULL || server_manifest == NULL) {
printf("Unable to load manifest after retrying (config or network problem?)\n");
goto clean_exit;
}
retries = 0;
timeout = 10;
ret = add_included_manifests(server_manifest);
if (ret) {
goto clean_exit;
}
subscription_versions_from_MoM(current_manifest, 1);
subscription_versions_from_MoM(server_manifest, 0);
link_submanifests(current_manifest, server_manifest);
/* updating subscribed manifests is done as part of recurse_manifest */
/* read the current collective of manifests that we are subscribed to */
current_manifest->submanifests = recurse_manifest(current_manifest, NULL);
if (!current_manifest->submanifests) {
printf("Cannot load current MoM sub-manifests, (%s), exiting\n", strerror(errno));
goto clean_exit;
}
/* consolidate the current collective manifests down into one in memory */
current_manifest->files = files_from_bundles(current_manifest->submanifests);
current_manifest->files = consolidate_files(current_manifest->files);
/* read the new collective of manifests that we are subscribed to */
server_manifest->submanifests = recurse_manifest(server_manifest, NULL);
if (!server_manifest->submanifests) {
printf("Error: Cannot load server MoM sub-manifests, (%s), exiting\n", strerror(errno));
goto clean_exit;
}
/* consolidate the new collective manifests down into one in memory */
server_manifest->files = files_from_bundles(server_manifest->submanifests);
server_manifest->files = consolidate_files(server_manifest->files);
/* prepare for an update process based on comparing two in memory manifests */
link_manifests(current_manifest, server_manifest);
#if 0
debug_write_manifest(current_manifest, "debug_manifest_current.txt");
debug_write_manifest(server_manifest, "debug_manifest_server.txt");
#endif
/* Step 4: check disk state before attempting update */
run_preupdate_scripts(server_manifest);
download_packs:
/* Step 5: get the packs and untar */
ret = download_subscribed_packs(false);
if (ret) {
// packs don't always exist, tolerate that but not ENONET
if (retries < MAX_TRIES) {
increment_retries(&retries, &timeout);
printf("Retry #%d downloading packs\n", retries);
goto download_packs;
}
printf("No network, or server unavailable for pack downloads\n");
goto clean_exit;
}
/* Step 6: some more housekeeping */
/* TODO: consider trying to do less sorting of manifests */
updates = create_update_list(current_manifest, server_manifest);
link_renames(updates, current_manifest); /* TODO: Have special lists for candidate and renames */
print_statistics(current_version, server_version);
/* Step 7: apply the update */
ret = update_loop(updates, server_manifest);
if (ret == 0) {
ret = update_device_latest_version(server_version);
printf("Update was applied.\n");
}
delete_motd();
/* Run any scripts that are needed to complete update */
run_scripts();
clean_exit:
list_free_list(updates);
free_manifest(current_manifest);
free_manifest(server_manifest);
clean_curl:
signature_terminate();
swupd_curl_cleanup();
free_subscriptions();
free_globals();
v_lockfile(lock_fd);
dump_file_descriptor_leaks();
if ((current_version < server_version) && (ret == 0)) {
printf("Update successful. System updated from version %d to version %d\n",
current_version, server_version);
} else if (ret == 0) {
printf("Update complete. System already up-to-date at version %d\n", current_version);
}
return ret;
}
/* This function does a simple verification of files listed in the
* subscribed bundle manifests. If the optional "fix" or "install" parameter
* is specified, the disk will be modified at each point during the
* sequential comparison of manifest files to disk files, where the disk is
* found to not match the manifest. This is notably different from update,
* which attempts to atomically (or nearly atomically) activate a set of
* pre-computed and validated staged changes as a group. */
int verify_main(int argc, char **argv)
{
struct manifest *official_manifest = NULL;
int ret;
int lock_fd;
struct list *subs = NULL;
copyright_header("software verify");
if (!parse_options(argc, argv)) {
return EINVALID_OPTION;
}
/* parse command line options */
assert(argc >= 0);
assert(argv != NULL);
ret = swupd_init(&lock_fd);
if (ret != 0) {
printf("Failed verify initialization, exiting now.\n");
return ret;
}
/* Gather current manifests */
if (!version) {
version = get_current_version(path_prefix);
if (version < 0) {
printf("Error: Unable to determine current OS version\n");
ret = ECURRENT_VERSION;
goto clean_and_exit;
}
}
if (version == -1) {
version = get_latest_version();
if (version < 0) {
printf("Unable to get latest version for install\n");
ret = EXIT_FAILURE;
goto clean_and_exit;
}
}
printf("Verifying version %i\n", version);
if (!check_network()) {
printf("Error: Network issue, unable to download manifest\n");
ret = ENOSWUPDSERVER;
goto clean_and_exit;
}
read_subscriptions_alt(&subs);
/*
* FIXME: We need a command line option to override this in case the
* certificate is hosed and the admin knows it and wants to recover.
*/
ret = rm_staging_dir_contents("download");
if (ret != 0) {
printf("Failed to remove prior downloads, carrying on anyway\n");
}
official_manifest = load_mom(version);
if (!official_manifest) {
/* This is hit when or if an OS version is specified for --fix which
* is not available, or if there is a server error and a manifest is
* not provided.
*/
printf("Unable to download/verify %d Manifest.MoM\n", version);
ret = EMOM_NOTFOUND;
/* No repair is possible without a manifest, nor is accurate reporting
* of the state of the system. Therefore cleanup, report failure and exit
*/
goto clean_and_exit;
}
ret = add_included_manifests(official_manifest, &subs);
if (ret) {
ret = EMANIFEST_LOAD;
goto clean_and_exit;
}
set_subscription_versions(official_manifest, NULL, &subs);
official_manifest->submanifests = recurse_manifest(official_manifest, subs, NULL);
if (!official_manifest->submanifests) {
printf("Error: Cannot load MoM sub-manifests\n");
ret = ERECURSE_MANIFEST;
goto clean_and_exit;
}
official_manifest->files = files_from_bundles(official_manifest->submanifests);
official_manifest->files = consolidate_files(official_manifest->files);
/* when fixing or installing we need input files. */
if (cmdline_option_fix || cmdline_option_install) {
ret = get_required_files(official_manifest, subs);
if (ret != 0) {
ret = -ret;
goto clean_and_exit;
}
}
/* preparation work complete. */
/*
* NOTHING ELSE IS ALLOWED TO FAIL/ABORT after this line.
* This tool is there to recover a nearly-bricked system. Aborting
* from this point forward, for any reason, will result in a bricked system.
*
* I don't care what your static analysis tools says
* I don't care what valgrind tells you
*
* There shall be no "goto fail;" from this point on.
*
* *** THE SHOW MUST GO ON ***
*/
if (cmdline_option_fix || cmdline_option_install) {
/*
* Next put the files in place that are missing completely.
* This is to avoid updating a symlink to a library before the new full file
* is already there. It's also the most safe operation, adding files rarely
* has unintended side effect. So lets do the safest thing first.
*/
printf("Adding any missing files\n");
add_missing_files(official_manifest);
}
if (cmdline_option_quick) {
/* quick only replaces missing files, so it is done here */
goto brick_the_system_and_clean_curl;
}
if (cmdline_option_fix) {
bool repair = true;
printf("Fixing modified files\n");
deal_with_hash_mismatches(official_manifest, repair);
/* removing files could be risky, so only do it if the
* prior phases had no problems */
if ((file_not_fixed_count == 0) && (file_not_replaced_count == 0)) {
remove_orphaned_files(official_manifest);
}
} else {
bool repair = false;
printf("Verifying files\n");
deal_with_hash_mismatches(official_manifest, repair);
}
free_manifest(official_manifest);
brick_the_system_and_clean_curl:
/* clean up */
/*
* naming convention: All exit goto labels must follow the "brick_the_system_and_FOO:" pattern
*/
/* report a summary of what we managed to do and not do */
printf("Inspected %i files\n", file_checked_count);
if (cmdline_option_fix || cmdline_option_install) {
printf(" %i files were missing\n", file_missing_count);
if (file_missing_count) {
printf(" %i of %i missing files were replaced\n", file_replaced_count, file_missing_count);
printf(" %i of %i missing files were not replaced\n", file_not_replaced_count, file_missing_count);
}
}
if (!cmdline_option_quick && file_mismatch_count > 0) {
printf(" %i files did not match\n", file_mismatch_count);
if (cmdline_option_fix) {
printf(" %i of %i files were fixed\n", file_fixed_count, file_mismatch_count);
printf(" %i of %i files were not fixed\n", file_not_fixed_count, file_mismatch_count);
}
}
if ((file_not_fixed_count == 0) && (file_not_replaced_count == 0) &&
cmdline_option_fix && !cmdline_option_quick) {
printf(" %i files found which should be deleted\n", file_extraneous_count);
if (file_extraneous_count) {
printf(" %i of %i files were deleted\n", file_deleted_count, file_extraneous_count);
printf(" %i of %i files were not deleted\n", file_not_deleted_count, file_extraneous_count);
}
}
if (cmdline_option_fix || cmdline_option_install) {
// always run in a fix or install case
need_update_boot = true;
need_update_bootloader = true;
run_scripts();
}
sync();
if ((file_not_fixed_count == 0) &&
(file_not_replaced_count == 0) &&
(file_not_deleted_count == 0)) {
ret = EXIT_SUCCESS;
} else {
ret = EXIT_FAILURE;
}
/* this concludes the critical section, after this point it's clean up time, the disk content is finished and final */
clean_and_exit:
telemetry(ret ? TELEMETRY_CRIT : TELEMETRY_INFO,
"verify",
"fix=%d\nret=%d\n"
"current_version=%d\n"
"file_replaced_count=%d\n"
"file_not_replaced_count=%d\n"
"file_missing_count=%d\n"
"file_fixed_count=%d\n"
"file_not_fixed_count=%d\n"
"file_deleted_count=%d\n"
"file_not_deleted_count=%d\n"
"file_mismatch_count=%d\n"
"file_extraneous_count=%d\n",
cmdline_option_fix || cmdline_option_install,
ret,
version,
file_replaced_count,
file_not_replaced_count,
file_missing_count,
file_fixed_count,
file_not_fixed_count,
file_deleted_count,
file_not_deleted_count,
file_mismatch_count,
file_extraneous_count);
if (ret == EXIT_SUCCESS) {
if (cmdline_option_fix || cmdline_option_install) {
printf("Fix successful\n");
} else {
/* This is just a verification */
printf("Verify successful\n");
}
} else {
if (cmdline_option_fix || cmdline_option_install) {
printf("Error: Fix did not fully succeed\n");
} else {
/* This is just a verification */
printf("Error: Verify did not fully succeed\n");
}
}
swupd_deinit(lock_fd, &subs);
return ret;
}