/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include "sd-daemon.h" #include "conf-parser.h" #include "daemon-util.h" #include "def.h" #include "fd-util.h" #include "fileio.h" #include "journal-remote-write.h" #include "journal-remote.h" #include "main-func.h" #include "memory-util.h" #include "parse-argument.h" #include "pretty-print.h" #include "process-util.h" #include "rlimit-util.h" #include "sigbus.h" #include "signal-util.h" #include "socket-netlink.h" #include "socket-util.h" #include "stat-util.h" #include "string-table.h" #include "strv.h" #define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-remote.pem" #define CERT_FILE CERTIFICATE_ROOT "/certs/journal-remote.pem" #define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem" static const char* arg_url = NULL; static const char* arg_getter = NULL; static const char* arg_listen_raw = NULL; static const char* arg_listen_http = NULL; static const char* arg_listen_https = NULL; static char** arg_files = NULL; /* Do not free this. */ static bool arg_compress = true; static bool arg_seal = false; static int http_socket = -1, https_socket = -1; static char** arg_gnutls_log = NULL; static JournalWriteSplitMode arg_split_mode = _JOURNAL_WRITE_SPLIT_INVALID; static const char* arg_output = NULL; static char *arg_key = NULL; static char *arg_cert = NULL; static char *arg_trust = NULL; #if HAVE_GNUTLS static bool arg_trust_all = false; #else static bool arg_trust_all = true; #endif STATIC_DESTRUCTOR_REGISTER(arg_gnutls_log, strv_freep); STATIC_DESTRUCTOR_REGISTER(arg_key, freep); STATIC_DESTRUCTOR_REGISTER(arg_cert, freep); STATIC_DESTRUCTOR_REGISTER(arg_trust, freep); static const char* const journal_write_split_mode_table[_JOURNAL_WRITE_SPLIT_MAX] = { [JOURNAL_WRITE_SPLIT_NONE] = "none", [JOURNAL_WRITE_SPLIT_HOST] = "host", }; DEFINE_PRIVATE_STRING_TABLE_LOOKUP(journal_write_split_mode, JournalWriteSplitMode); static DEFINE_CONFIG_PARSE_ENUM(config_parse_write_split_mode, journal_write_split_mode, JournalWriteSplitMode, "Failed to parse split mode setting"); /********************************************************************** ********************************************************************** **********************************************************************/ static int spawn_child(const char* child, char** argv) { pid_t child_pid; int fd[2], r; if (pipe(fd) < 0) return log_error_errno(errno, "Failed to create pager pipe: %m"); r = safe_fork("(remote)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &child_pid); if (r < 0) { safe_close_pair(fd); return r; } /* In the child */ if (r == 0) { fd[0] = safe_close(fd[0]); r = rearrange_stdio(STDIN_FILENO, TAKE_FD(fd[1]), STDERR_FILENO); if (r < 0) { log_error_errno(r, "Failed to dup pipe to stdout: %m"); _exit(EXIT_FAILURE); } (void) rlimit_nofile_safe(); execvp(child, argv); log_error_errno(errno, "Failed to exec child %s: %m", child); _exit(EXIT_FAILURE); } safe_close(fd[1]); r = fd_nonblock(fd[0], true); if (r < 0) log_warning_errno(errno, "Failed to set child pipe to non-blocking: %m"); return fd[0]; } static int spawn_curl(const char* url) { char **argv = STRV_MAKE("curl", "-HAccept: application/vnd.fdo.journal", "--silent", "--show-error", url); int r; r = spawn_child("curl", argv); if (r < 0) log_error_errno(r, "Failed to spawn curl: %m"); return r; } static int spawn_getter(const char *getter) { int r; _cleanup_strv_free_ char **words = NULL; assert(getter); r = strv_split_full(&words, getter, WHITESPACE, EXTRACT_UNQUOTE); if (r < 0) return log_error_errno(r, "Failed to split getter option: %m"); r = spawn_child(words[0], words); if (r < 0) log_error_errno(r, "Failed to spawn getter %s: %m", getter); return r; } /********************************************************************** ********************************************************************** **********************************************************************/ static int null_timer_event_handler(sd_event_source *s, uint64_t usec, void *userdata); static int dispatch_http_event(sd_event_source *event, int fd, uint32_t revents, void *userdata); static int request_meta(void **connection_cls, int fd, char *hostname) { RemoteSource *source; Writer *writer; int r; assert(connection_cls); if (*connection_cls) return 0; r = journal_remote_get_writer(journal_remote_server_global, hostname, &writer); if (r < 0) return log_warning_errno(r, "Failed to get writer for source %s: %m", hostname); source = source_new(fd, true, hostname, writer); if (!source) { writer_unref(writer); return log_oom(); } log_debug("Added RemoteSource as connection metadata %p", source); *connection_cls = source; return 0; } static void request_meta_free(void *cls, struct MHD_Connection *connection, void **connection_cls, enum MHD_RequestTerminationCode toe) { RemoteSource *s; assert(connection_cls); s = *connection_cls; if (s) { log_debug("Cleaning up connection metadata %p", s); source_free(s); *connection_cls = NULL; } } static int process_http_upload( struct MHD_Connection *connection, const char *upload_data, size_t *upload_data_size, RemoteSource *source) { bool finished = false; size_t remaining; int r; assert(source); log_trace("%s: connection %p, %zu bytes", __func__, connection, *upload_data_size); if (*upload_data_size) { log_trace("Received %zu bytes", *upload_data_size); r = journal_importer_push_data(&source->importer, upload_data, *upload_data_size); if (r < 0) return mhd_respond_oom(connection); *upload_data_size = 0; } else finished = true; for (;;) { r = process_source(source, journal_remote_server_global->file_flags); if (r == -EAGAIN) break; if (r < 0) { if (r == -ENOBUFS) log_warning_errno(r, "Entry is above the maximum of %u, aborting connection %p.", DATA_SIZE_MAX, connection); else if (r == -E2BIG) log_warning_errno(r, "Entry with more fields than the maximum of %u, aborting connection %p.", ENTRY_FIELD_COUNT_MAX, connection); else log_warning_errno(r, "Failed to process data, aborting connection %p: %m", connection); return MHD_NO; } } if (!finished) return MHD_YES; /* The upload is finished */ remaining = journal_importer_bytes_remaining(&source->importer); if (remaining > 0) { log_warning("Premature EOF byte. %zu bytes lost.", remaining); return mhd_respondf(connection, 0, MHD_HTTP_EXPECTATION_FAILED, "Premature EOF. %zu bytes of trailing data not processed.", remaining); } return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK."); }; static mhd_result request_handler( void *cls, struct MHD_Connection *connection, const char *url, const char *method, const char *version, const char *upload_data, size_t *upload_data_size, void **connection_cls) { const char *header; int r, code, fd; _cleanup_free_ char *hostname = NULL; bool chunked = false; assert(connection); assert(connection_cls); assert(url); assert(method); log_trace("Handling a connection %s %s %s", method, url, version); if (*connection_cls) return process_http_upload(connection, upload_data, upload_data_size, *connection_cls); if (!streq(method, "POST")) return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); if (!streq(url, "/upload")) return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Type"); if (!header || !streq(header, "application/vnd.fdo.journal")) return mhd_respond(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE, "Content-Type: application/vnd.fdo.journal is required."); header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Transfer-Encoding"); if (header) { if (!strcaseeq(header, "chunked")) return mhd_respondf(connection, 0, MHD_HTTP_BAD_REQUEST, "Unsupported Transfer-Encoding type: %s", header); chunked = true; } header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Content-Length"); if (header) { size_t len; if (chunked) return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Content-Length must not specified when Transfer-Encoding type is 'chuncked'"); r = safe_atozu(header, &len); if (r < 0) return mhd_respondf(connection, r, MHD_HTTP_LENGTH_REQUIRED, "Content-Length: %s cannot be parsed: %m", header); if (len > ENTRY_SIZE_MAX) /* When serialized, an entry of maximum size might be slightly larger, * so this does not correspond exactly to the limit in journald. Oh well. */ return mhd_respondf(connection, 0, MHD_HTTP_CONTENT_TOO_LARGE, "Payload larger than maximum size of %u bytes", ENTRY_SIZE_MAX); } { const union MHD_ConnectionInfo *ci; ci = MHD_get_connection_info(connection, MHD_CONNECTION_INFO_CONNECTION_FD); if (!ci) { log_error("MHD_get_connection_info failed: cannot get remote fd"); return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Cannot check remote address."); } fd = ci->connect_fd; assert(fd >= 0); } if (journal_remote_server_global->check_trust) { r = check_permissions(connection, &code, &hostname); if (r < 0) return code; } else { r = getpeername_pretty(fd, false, &hostname); if (r < 0) return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Cannot check remote hostname."); } assert(hostname); r = request_meta(connection_cls, fd, hostname); if (r == -ENOMEM) return respond_oom(connection); else if (r < 0) return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "%m"); hostname = NULL; return MHD_YES; } static int setup_microhttpd_server(RemoteServer *s, int fd, const char *key, const char *cert, const char *trust) { struct MHD_OptionItem opts[] = { { MHD_OPTION_NOTIFY_COMPLETED, (intptr_t) request_meta_free}, { MHD_OPTION_EXTERNAL_LOGGER, (intptr_t) microhttpd_logger}, { MHD_OPTION_LISTEN_SOCKET, fd}, { MHD_OPTION_CONNECTION_MEMORY_LIMIT, 128*1024}, { MHD_OPTION_END}, { MHD_OPTION_END}, { MHD_OPTION_END}, { MHD_OPTION_END}, { MHD_OPTION_END}}; int opts_pos = 4; int flags = MHD_USE_DEBUG | MHD_USE_DUAL_STACK | MHD_USE_EPOLL | MHD_USE_ITC; const union MHD_DaemonInfo *info; int r, epoll_fd; MHDDaemonWrapper *d; assert(fd >= 0); r = fd_nonblock(fd, true); if (r < 0) return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd); /* MHD_OPTION_STRICT_FOR_CLIENT is introduced in microhttpd 0.9.54, * and MHD_USE_PEDANTIC_CHECKS will be deprecated in future. * If MHD_USE_PEDANTIC_CHECKS is '#define'd, then it is deprecated * and we should use MHD_OPTION_STRICT_FOR_CLIENT. On the other hand, * if MHD_USE_PEDANTIC_CHECKS is not '#define'd, then it is not * deprecated yet and there exists an enum element with the same name. * So we can safely use it. */ #ifdef MHD_USE_PEDANTIC_CHECKS opts[opts_pos++] = (struct MHD_OptionItem) {MHD_OPTION_STRICT_FOR_CLIENT, 1}; #else flags |= MHD_USE_PEDANTIC_CHECKS; #endif if (key) { assert(cert); opts[opts_pos++] = (struct MHD_OptionItem) {MHD_OPTION_HTTPS_MEM_KEY, 0, (char*) key}; opts[opts_pos++] = (struct MHD_OptionItem) {MHD_OPTION_HTTPS_MEM_CERT, 0, (char*) cert}; flags |= MHD_USE_TLS; if (trust) opts[opts_pos++] = (struct MHD_OptionItem) {MHD_OPTION_HTTPS_MEM_TRUST, 0, (char*) trust}; } d = new(MHDDaemonWrapper, 1); if (!d) return log_oom(); d->fd = (uint64_t) fd; d->daemon = MHD_start_daemon(flags, 0, NULL, NULL, request_handler, NULL, MHD_OPTION_ARRAY, opts, MHD_OPTION_END); if (!d->daemon) { log_error("Failed to start µhttp daemon"); r = -EINVAL; goto error; } log_debug("Started MHD %s daemon on fd:%d (wrapper @ %p)", key ? "HTTPS" : "HTTP", fd, d); info = MHD_get_daemon_info(d->daemon, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY); if (!info) { log_error("µhttp returned NULL daemon info"); r = -EOPNOTSUPP; goto error; } epoll_fd = info->listen_fd; if (epoll_fd < 0) { log_error("µhttp epoll fd is invalid"); r = -EUCLEAN; goto error; } r = sd_event_add_io(s->events, &d->io_event, epoll_fd, EPOLLIN, dispatch_http_event, d); if (r < 0) { log_error_errno(r, "Failed to add event callback: %m"); goto error; } r = sd_event_source_set_description(d->io_event, "io_event"); if (r < 0) { log_error_errno(r, "Failed to set source name: %m"); goto error; } r = sd_event_add_time(s->events, &d->timer_event, CLOCK_MONOTONIC, UINT64_MAX, 0, null_timer_event_handler, d); if (r < 0) { log_error_errno(r, "Failed to add timer_event: %m"); goto error; } r = sd_event_source_set_description(d->timer_event, "timer_event"); if (r < 0) { log_error_errno(r, "Failed to set source name: %m"); goto error; } r = hashmap_ensure_put(&s->daemons, &uint64_hash_ops, &d->fd, d); if (r == -ENOMEM) { log_oom(); goto error; } if (r < 0) { log_error_errno(r, "Failed to add daemon to hashmap: %m"); goto error; } s->active++; return 0; error: MHD_stop_daemon(d->daemon); free(d->daemon); free(d); return r; } static int setup_microhttpd_socket(RemoteServer *s, const char *address, const char *key, const char *cert, const char *trust) { int fd; fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM, SOCK_CLOEXEC); if (fd < 0) return fd; return setup_microhttpd_server(s, fd, key, cert, trust); } static int null_timer_event_handler(sd_event_source *timer_event, uint64_t usec, void *userdata) { return dispatch_http_event(timer_event, 0, 0, userdata); } static int dispatch_http_event(sd_event_source *event, int fd, uint32_t revents, void *userdata) { MHDDaemonWrapper *d = ASSERT_PTR(userdata); int r; MHD_UNSIGNED_LONG_LONG timeout = ULLONG_MAX; r = MHD_run(d->daemon); if (r == MHD_NO) // FIXME: unregister daemon return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "MHD_run failed!"); if (MHD_get_timeout(d->daemon, &timeout) == MHD_NO) timeout = ULLONG_MAX; r = sd_event_source_set_time(d->timer_event, timeout); if (r < 0) { log_warning_errno(r, "Unable to set event loop timeout: %m, this may result in indefinite blocking!"); return 1; } r = sd_event_source_set_enabled(d->timer_event, SD_EVENT_ON); if (r < 0) log_warning_errno(r, "Unable to enable timer_event: %m, this may result in indefinite blocking!"); return 1; /* work to do */ } /********************************************************************** ********************************************************************** **********************************************************************/ static int setup_signals(RemoteServer *s) { int r; assert(s); assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0); r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s); if (r < 0) return r; r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s); if (r < 0) return r; return 0; } static int setup_raw_socket(RemoteServer *s, const char *address) { int fd; fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM, SOCK_CLOEXEC); if (fd < 0) return fd; return journal_remote_add_raw_socket(s, fd); } static int create_remoteserver( RemoteServer *s, const char* key, const char* cert, const char* trust) { int r, n, fd; r = journal_remote_server_init( s, arg_output, arg_split_mode, (arg_compress ? JOURNAL_COMPRESS : 0) | (arg_seal ? JOURNAL_SEAL : 0)); if (r < 0) return r; r = setup_signals(s); if (r < 0) return log_error_errno(r, "Failed to set up signals: %m"); n = sd_listen_fds(true); if (n < 0) return log_error_errno(n, "Failed to read listening file descriptors from environment: %m"); else log_debug("Received %d descriptors", n); if (MAX(http_socket, https_socket) >= SD_LISTEN_FDS_START + n) return log_error_errno(SYNTHETIC_ERRNO(EBADFD), "Received fewer sockets than expected"); for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { if (sd_is_socket(fd, AF_UNSPEC, 0, true)) { log_debug("Received a listening socket (fd:%d)", fd); if (fd == http_socket) r = setup_microhttpd_server(s, fd, NULL, NULL, NULL); else if (fd == https_socket) r = setup_microhttpd_server(s, fd, key, cert, trust); else r = journal_remote_add_raw_socket(s, fd); } else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) { char *hostname; r = getpeername_pretty(fd, false, &hostname); if (r < 0) return log_error_errno(r, "Failed to retrieve remote name: %m"); log_debug("Received a connection socket (fd:%d) from %s", fd, hostname); r = journal_remote_add_source(s, fd, hostname, true); } else return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown socket passed on fd:%d", fd); if (r < 0) return log_error_errno(r, "Failed to register socket (fd:%d): %m", fd); } if (arg_getter) { log_info("Spawning getter %s...", arg_getter); fd = spawn_getter(arg_getter); if (fd < 0) return fd; r = journal_remote_add_source(s, fd, (char*) arg_output, false); if (r < 0) return r; } if (arg_url) { const char *url, *hostname; if (!strstr(arg_url, "/entries")) { if (endswith(arg_url, "/")) url = strjoina(arg_url, "entries"); else url = strjoina(arg_url, "/entries"); } else url = strdupa_safe(arg_url); log_info("Spawning curl %s...", url); fd = spawn_curl(url); if (fd < 0) return fd; hostname = STARTSWITH_SET(arg_url, "https://", "http://"); if (!hostname) hostname = arg_url; hostname = strndupa_safe(hostname, strcspn(hostname, "/:")); r = journal_remote_add_source(s, fd, (char *) hostname, false); if (r < 0) return r; } if (arg_listen_raw) { log_debug("Listening on a socket..."); r = setup_raw_socket(s, arg_listen_raw); if (r < 0) return r; } if (arg_listen_http) { r = setup_microhttpd_socket(s, arg_listen_http, NULL, NULL, NULL); if (r < 0) return r; } if (arg_listen_https) { r = setup_microhttpd_socket(s, arg_listen_https, key, cert, trust); if (r < 0) return r; } STRV_FOREACH(file, arg_files) { const char *output_name; if (streq(*file, "-")) { log_debug("Using standard input as source."); fd = STDIN_FILENO; output_name = "stdin"; } else { log_debug("Reading file %s...", *file); fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK); if (fd < 0) return log_error_errno(errno, "Failed to open %s: %m", *file); output_name = *file; } r = journal_remote_add_source(s, fd, (char*) output_name, false); if (r < 0) return r; } if (s->active == 0) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Zero sources specified"); if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE) { /* In this case we know what the writer will be called, so we can create it and verify that we can create output as expected. */ r = journal_remote_get_writer(s, NULL, &s->_single_writer); if (r < 0) return r; } return 0; } static int negative_fd(const char *spec) { /* Return a non-positive number as its inverse, -EINVAL otherwise. */ int fd, r; r = safe_atoi(spec, &fd); if (r < 0) return r; if (fd > 0) return -EINVAL; else return -fd; } static int parse_config(void) { const ConfigTableItem items[] = { { "Remote", "Seal", config_parse_bool, 0, &arg_seal }, { "Remote", "SplitMode", config_parse_write_split_mode, 0, &arg_split_mode }, { "Remote", "ServerKeyFile", config_parse_path, 0, &arg_key }, { "Remote", "ServerCertificateFile", config_parse_path, 0, &arg_cert }, { "Remote", "TrustedCertificateFile", config_parse_path, 0, &arg_trust }, {} }; return config_parse_many_nulstr( PKGSYSCONFDIR "/journal-remote.conf", CONF_PATHS_NULSTR("systemd/journal-remote.conf.d"), "Remote\0", config_item_table_lookup, items, CONFIG_PARSE_WARN, NULL, NULL); } static int help(void) { _cleanup_free_ char *link = NULL; int r; r = terminal_urlify_man("systemd-journal-remote.service", "8", &link); if (r < 0) return log_oom(); printf("%s [OPTIONS...] {FILE|-}...\n\n" "Write external journal events to journal file(s).\n\n" " -h --help Show this help\n" " --version Show package version\n" " --url=URL Read events from systemd-journal-gatewayd at URL\n" " --getter=COMMAND Read events from the output of COMMAND\n" " --listen-raw=ADDR Listen for connections at ADDR\n" " --listen-http=ADDR Listen for HTTP connections at ADDR\n" " --listen-https=ADDR Listen for HTTPS connections at ADDR\n" " -o --output=FILE|DIR Write output to FILE or DIR/external-*.journal\n" " --compress[=BOOL] Use compression in the output journal (default: yes)\n" " --seal[=BOOL] Use event sealing (default: no)\n" " --key=FILENAME SSL key in PEM format (default:\n" " \"" PRIV_KEY_FILE "\")\n" " --cert=FILENAME SSL certificate in PEM format (default:\n" " \"" CERT_FILE "\")\n" " --trust=FILENAME|all SSL CA certificate or disable checking (default:\n" " \"" TRUST_FILE "\")\n" " --gnutls-log=CATEGORY...\n" " Specify a list of gnutls logging categories\n" " --split-mode=none|host How many output files to create\n" "\nNote: file descriptors from sd_listen_fds() will be consumed, too.\n" "\nSee the %s for details.\n", program_invocation_short_name, link); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_URL, ARG_LISTEN_RAW, ARG_LISTEN_HTTP, ARG_LISTEN_HTTPS, ARG_GETTER, ARG_SPLIT_MODE, ARG_COMPRESS, ARG_SEAL, ARG_KEY, ARG_CERT, ARG_TRUST, ARG_GNUTLS_LOG, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "url", required_argument, NULL, ARG_URL }, { "getter", required_argument, NULL, ARG_GETTER }, { "listen-raw", required_argument, NULL, ARG_LISTEN_RAW }, { "listen-http", required_argument, NULL, ARG_LISTEN_HTTP }, { "listen-https", required_argument, NULL, ARG_LISTEN_HTTPS }, { "output", required_argument, NULL, 'o' }, { "split-mode", required_argument, NULL, ARG_SPLIT_MODE }, { "compress", optional_argument, NULL, ARG_COMPRESS }, { "seal", optional_argument, NULL, ARG_SEAL }, { "key", required_argument, NULL, ARG_KEY }, { "cert", required_argument, NULL, ARG_CERT }, { "trust", required_argument, NULL, ARG_TRUST }, { "gnutls-log", required_argument, NULL, ARG_GNUTLS_LOG }, {} }; int c, r; bool type_a, type_b; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "ho:", options, NULL)) >= 0) switch (c) { case 'h': return help(); case ARG_VERSION: return version(); case ARG_URL: if (arg_url) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot currently set more than one --url"); arg_url = optarg; break; case ARG_GETTER: if (arg_getter) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot currently use --getter more than once"); arg_getter = optarg; break; case ARG_LISTEN_RAW: if (arg_listen_raw) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot currently use --listen-raw more than once"); arg_listen_raw = optarg; break; case ARG_LISTEN_HTTP: if (arg_listen_http || http_socket >= 0) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot currently use --listen-http more than once"); r = negative_fd(optarg); if (r >= 0) http_socket = r; else arg_listen_http = optarg; break; case ARG_LISTEN_HTTPS: if (arg_listen_https || https_socket >= 0) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot currently use --listen-https more than once"); r = negative_fd(optarg); if (r >= 0) https_socket = r; else arg_listen_https = optarg; break; case ARG_KEY: if (arg_key) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Key file specified twice"); arg_key = strdup(optarg); if (!arg_key) return log_oom(); break; case ARG_CERT: if (arg_cert) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Certificate file specified twice"); arg_cert = strdup(optarg); if (!arg_cert) return log_oom(); break; case ARG_TRUST: #if HAVE_GNUTLS if (arg_trust || arg_trust_all) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Confusing trusted CA configuration"); if (streq(optarg, "all")) arg_trust_all = true; else { arg_trust = strdup(optarg); if (!arg_trust) return log_oom(); } #else return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --trust is not available."); #endif break; case 'o': if (arg_output) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "cannot use --output/-o more than once"); arg_output = optarg; break; case ARG_SPLIT_MODE: arg_split_mode = journal_write_split_mode_from_string(optarg); if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID) return log_error_errno(arg_split_mode, "Invalid split mode: %s", optarg); break; case ARG_COMPRESS: r = parse_boolean_argument("--compress", optarg, &arg_compress); if (r < 0) return r; break; case ARG_SEAL: r = parse_boolean_argument("--seal", optarg, &arg_seal); if (r < 0) return r; break; case ARG_GNUTLS_LOG: #if HAVE_GNUTLS for (const char* p = optarg;;) { _cleanup_free_ char *word = NULL; r = extract_first_word(&p, &word, ",", 0); if (r < 0) return log_error_errno(r, "Failed to parse --gnutls-log= argument: %m"); if (r == 0) break; if (strv_push(&arg_gnutls_log, word) < 0) return log_oom(); word = NULL; } break; #else return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --gnutls-log is not available."); #endif case '?': return -EINVAL; default: assert_not_reached(); } if (optind < argc) arg_files = argv + optind; type_a = arg_getter || !strv_isempty(arg_files); type_b = arg_url || arg_listen_raw || arg_listen_http || arg_listen_https || sd_listen_fds(false) > 0; if (type_a && type_b) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot use file input or --getter with " "--arg-listen-... or socket activation."); if (type_a) { if (!arg_output) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --output must be specified with file input or --getter."); if (!IN_SET(arg_split_mode, JOURNAL_WRITE_SPLIT_NONE, _JOURNAL_WRITE_SPLIT_INVALID)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "For active sources, only --split-mode=none is allowed."); arg_split_mode = JOURNAL_WRITE_SPLIT_NONE; } if (arg_split_mode == _JOURNAL_WRITE_SPLIT_INVALID) arg_split_mode = JOURNAL_WRITE_SPLIT_HOST; if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE && arg_output) { if (is_dir(arg_output, true) > 0) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "For SplitMode=none, output must be a file."); if (!endswith(arg_output, ".journal")) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "For SplitMode=none, output file name must end with .journal."); } if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST && arg_output && is_dir(arg_output, true) <= 0) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "For SplitMode=host, output must be a directory."); log_debug("Full config: SplitMode=%s Key=%s Cert=%s Trust=%s", journal_write_split_mode_to_string(arg_split_mode), strna(arg_key), strna(arg_cert), strna(arg_trust)); return 1 /* work to do */; } static int load_certificates(char **key, char **cert, char **trust) { int r; r = read_full_file_full( AT_FDCWD, arg_key ?: PRIV_KEY_FILE, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_SECURE|READ_FULL_FILE_WARN_WORLD_READABLE|READ_FULL_FILE_CONNECT_SOCKET, NULL, key, NULL); if (r < 0) return log_error_errno(r, "Failed to read key from file '%s': %m", arg_key ?: PRIV_KEY_FILE); r = read_full_file_full( AT_FDCWD, arg_cert ?: CERT_FILE, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_CONNECT_SOCKET, NULL, cert, NULL); if (r < 0) return log_error_errno(r, "Failed to read certificate from file '%s': %m", arg_cert ?: CERT_FILE); if (arg_trust_all) log_info("Certificate checking disabled."); else { r = read_full_file_full( AT_FDCWD, arg_trust ?: TRUST_FILE, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_CONNECT_SOCKET, NULL, trust, NULL); if (r < 0) return log_error_errno(r, "Failed to read CA certificate file '%s': %m", arg_trust ?: TRUST_FILE); } if ((arg_listen_raw || arg_listen_http) && *trust) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --trust makes all non-HTTPS connections untrusted."); return 0; } static int run(int argc, char **argv) { _cleanup_(journal_remote_server_destroy) RemoteServer s = {}; _unused_ _cleanup_(notify_on_cleanup) const char *notify_message = NULL; _cleanup_(erase_and_freep) char *key = NULL; _cleanup_free_ char *cert = NULL, *trust = NULL; int r; log_show_color(true); log_parse_environment(); /* The journal merging logic potentially needs a lot of fds. */ (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE); sigbus_install(); r = parse_config(); if (r < 0) return r; r = parse_argv(argc, argv); if (r <= 0) return r; if (arg_listen_http || arg_listen_https) { r = setup_gnutls_logger(arg_gnutls_log); if (r < 0) return r; } if (arg_listen_https || https_socket >= 0) { r = load_certificates(&key, &cert, &trust); if (r < 0) return r; s.check_trust = !arg_trust_all; } r = create_remoteserver(&s, key, cert, trust); if (r < 0) return r; r = sd_event_set_watchdog(s.events, true); if (r < 0) return log_error_errno(r, "Failed to enable watchdog: %m"); log_debug("Watchdog is %sd.", enable_disable(r > 0)); log_debug("%s running as pid "PID_FMT, program_invocation_short_name, getpid_cached()); notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING); while (s.active) { r = sd_event_get_state(s.events); if (r < 0) return r; if (r == SD_EVENT_FINISHED) break; r = sd_event_run(s.events, -1); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); } notify_message = NULL; (void) sd_notifyf(false, "STOPPING=1\n" "STATUS=Shutting down after writing %" PRIu64 " entries...", s.event_count); log_info("Finishing after writing %" PRIu64 " entries", s.event_count); return 0; } DEFINE_MAIN_FUNCTION(run);