| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2012 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <microhttpd.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "sd-bus.h" |
| #include "sd-daemon.h" |
| #include "sd-journal.h" |
| |
| #include "alloc-util.h" |
| #include "bus-util.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "hostname-util.h" |
| #include "log.h" |
| #include "logs-show.h" |
| #include "microhttpd-util.h" |
| #include "parse-util.h" |
| #include "sigbus.h" |
| #include "util.h" |
| |
| #define JOURNAL_WAIT_TIMEOUT (10*USEC_PER_SEC) |
| |
| static char *arg_key_pem = NULL; |
| static char *arg_cert_pem = NULL; |
| static char *arg_trust_pem = NULL; |
| static char *arg_directory = NULL; |
| |
| typedef struct RequestMeta { |
| sd_journal *journal; |
| |
| OutputMode mode; |
| |
| char *cursor; |
| int64_t n_skip; |
| uint64_t n_entries; |
| bool n_entries_set; |
| |
| FILE *tmp; |
| uint64_t delta, size; |
| |
| int argument_parse_error; |
| |
| bool follow; |
| bool discrete; |
| |
| uint64_t n_fields; |
| bool n_fields_set; |
| } RequestMeta; |
| |
| static const char* const mime_types[_OUTPUT_MODE_MAX] = { |
| [OUTPUT_SHORT] = "text/plain", |
| [OUTPUT_JSON] = "application/json", |
| [OUTPUT_JSON_SSE] = "text/event-stream", |
| [OUTPUT_EXPORT] = "application/vnd.fdo.journal", |
| }; |
| |
| static RequestMeta *request_meta(void **connection_cls) { |
| RequestMeta *m; |
| |
| assert(connection_cls); |
| if (*connection_cls) |
| return *connection_cls; |
| |
| m = new0(RequestMeta, 1); |
| if (!m) |
| return NULL; |
| |
| *connection_cls = m; |
| return m; |
| } |
| |
| static void request_meta_free( |
| void *cls, |
| struct MHD_Connection *connection, |
| void **connection_cls, |
| enum MHD_RequestTerminationCode toe) { |
| |
| RequestMeta *m = *connection_cls; |
| |
| if (!m) |
| return; |
| |
| sd_journal_close(m->journal); |
| |
| safe_fclose(m->tmp); |
| |
| free(m->cursor); |
| free(m); |
| } |
| |
| static int open_journal(RequestMeta *m) { |
| assert(m); |
| |
| if (m->journal) |
| return 0; |
| |
| if (arg_directory) |
| return sd_journal_open_directory(&m->journal, arg_directory, 0); |
| else |
| return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); |
| } |
| |
| static int request_meta_ensure_tmp(RequestMeta *m) { |
| assert(m); |
| |
| if (m->tmp) |
| rewind(m->tmp); |
| else { |
| int fd; |
| |
| fd = open_tmpfile_unlinkable("/tmp", O_RDWR|O_CLOEXEC); |
| if (fd < 0) |
| return fd; |
| |
| m->tmp = fdopen(fd, "w+"); |
| if (!m->tmp) { |
| safe_close(fd); |
| return -errno; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static ssize_t request_reader_entries( |
| void *cls, |
| uint64_t pos, |
| char *buf, |
| size_t max) { |
| |
| RequestMeta *m = cls; |
| int r; |
| size_t n, k; |
| |
| assert(m); |
| assert(buf); |
| assert(max > 0); |
| assert(pos >= m->delta); |
| |
| pos -= m->delta; |
| |
| while (pos >= m->size) { |
| off_t sz; |
| |
| /* End of this entry, so let's serialize the next |
| * one */ |
| |
| if (m->n_entries_set && |
| m->n_entries <= 0) |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| |
| if (m->n_skip < 0) |
| r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); |
| else if (m->n_skip > 0) |
| r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
| else |
| r = sd_journal_next(m->journal); |
| |
| if (r < 0) { |
| log_error_errno(r, "Failed to advance journal pointer: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } else if (r == 0) { |
| |
| if (m->follow) { |
| r = sd_journal_wait(m->journal, (uint64_t) JOURNAL_WAIT_TIMEOUT); |
| if (r < 0) { |
| log_error_errno(r, "Couldn't wait for journal event: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| if (r == SD_JOURNAL_NOP) |
| break; |
| |
| continue; |
| } |
| |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| } |
| |
| if (m->discrete) { |
| assert(m->cursor); |
| |
| r = sd_journal_test_cursor(m->journal, m->cursor); |
| if (r < 0) { |
| log_error_errno(r, "Failed to test cursor: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| if (r == 0) |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| } |
| |
| pos -= m->size; |
| m->delta += m->size; |
| |
| if (m->n_entries_set) |
| m->n_entries -= 1; |
| |
| m->n_skip = 0; |
| |
| r = request_meta_ensure_tmp(m); |
| if (r < 0) { |
| log_error_errno(r, "Failed to create temporary file: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, |
| NULL, NULL, NULL); |
| if (r < 0) { |
| log_error_errno(r, "Failed to serialize item: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| sz = ftello(m->tmp); |
| if (sz == (off_t) -1) { |
| log_error_errno(errno, "Failed to retrieve file position: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| m->size = (uint64_t) sz; |
| } |
| |
| if (m->tmp == NULL && m->follow) |
| return 0; |
| |
| if (fseeko(m->tmp, pos, SEEK_SET) < 0) { |
| log_error_errno(errno, "Failed to seek to position: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| n = m->size - pos; |
| if (n < 1) |
| return 0; |
| if (n > max) |
| n = max; |
| |
| errno = 0; |
| k = fread(buf, 1, n, m->tmp); |
| if (k != n) { |
| log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| return (ssize_t) k; |
| } |
| |
| static int request_parse_accept( |
| RequestMeta *m, |
| struct MHD_Connection *connection) { |
| |
| const char *header; |
| |
| assert(m); |
| assert(connection); |
| |
| header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
| if (!header) |
| return 0; |
| |
| if (streq(header, mime_types[OUTPUT_JSON])) |
| m->mode = OUTPUT_JSON; |
| else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
| m->mode = OUTPUT_JSON_SSE; |
| else if (streq(header, mime_types[OUTPUT_EXPORT])) |
| m->mode = OUTPUT_EXPORT; |
| else |
| m->mode = OUTPUT_SHORT; |
| |
| return 0; |
| } |
| |
| static int request_parse_range( |
| RequestMeta *m, |
| struct MHD_Connection *connection) { |
| |
| const char *range, *colon, *colon2; |
| int r; |
| |
| assert(m); |
| assert(connection); |
| |
| range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); |
| if (!range) |
| return 0; |
| |
| if (!startswith(range, "entries=")) |
| return 0; |
| |
| range += 8; |
| range += strspn(range, WHITESPACE); |
| |
| colon = strchr(range, ':'); |
| if (!colon) |
| m->cursor = strdup(range); |
| else { |
| const char *p; |
| |
| colon2 = strchr(colon + 1, ':'); |
| if (colon2) { |
| _cleanup_free_ char *t; |
| |
| t = strndup(colon + 1, colon2 - colon - 1); |
| if (!t) |
| return -ENOMEM; |
| |
| r = safe_atoi64(t, &m->n_skip); |
| if (r < 0) |
| return r; |
| } |
| |
| p = (colon2 ? colon2 : colon) + 1; |
| if (*p) { |
| r = safe_atou64(p, &m->n_entries); |
| if (r < 0) |
| return r; |
| |
| if (m->n_entries <= 0) |
| return -EINVAL; |
| |
| m->n_entries_set = true; |
| } |
| |
| m->cursor = strndup(range, colon - range); |
| } |
| |
| if (!m->cursor) |
| return -ENOMEM; |
| |
| m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; |
| if (isempty(m->cursor)) |
| m->cursor = mfree(m->cursor); |
| |
| return 0; |
| } |
| |
| static int request_parse_arguments_iterator( |
| void *cls, |
| enum MHD_ValueKind kind, |
| const char *key, |
| const char *value) { |
| |
| RequestMeta *m = cls; |
| _cleanup_free_ char *p = NULL; |
| int r; |
| |
| assert(m); |
| |
| if (isempty(key)) { |
| m->argument_parse_error = -EINVAL; |
| return MHD_NO; |
| } |
| |
| if (streq(key, "follow")) { |
| if (isempty(value)) { |
| m->follow = true; |
| return MHD_YES; |
| } |
| |
| r = parse_boolean(value); |
| if (r < 0) { |
| m->argument_parse_error = r; |
| return MHD_NO; |
| } |
| |
| m->follow = r; |
| return MHD_YES; |
| } |
| |
| if (streq(key, "discrete")) { |
| if (isempty(value)) { |
| m->discrete = true; |
| return MHD_YES; |
| } |
| |
| r = parse_boolean(value); |
| if (r < 0) { |
| m->argument_parse_error = r; |
| return MHD_NO; |
| } |
| |
| m->discrete = r; |
| return MHD_YES; |
| } |
| |
| if (streq(key, "boot")) { |
| if (isempty(value)) |
| r = true; |
| else { |
| r = parse_boolean(value); |
| if (r < 0) { |
| m->argument_parse_error = r; |
| return MHD_NO; |
| } |
| } |
| |
| if (r) { |
| char match[9 + 32 + 1] = "_BOOT_ID="; |
| sd_id128_t bid; |
| |
| r = sd_id128_get_boot(&bid); |
| if (r < 0) { |
| log_error_errno(r, "Failed to get boot ID: %m"); |
| return MHD_NO; |
| } |
| |
| sd_id128_to_string(bid, match + 9); |
| r = sd_journal_add_match(m->journal, match, sizeof(match)-1); |
| if (r < 0) { |
| m->argument_parse_error = r; |
| return MHD_NO; |
| } |
| } |
| |
| return MHD_YES; |
| } |
| |
| p = strjoin(key, "=", strempty(value)); |
| if (!p) { |
| m->argument_parse_error = log_oom(); |
| return MHD_NO; |
| } |
| |
| r = sd_journal_add_match(m->journal, p, 0); |
| if (r < 0) { |
| m->argument_parse_error = r; |
| return MHD_NO; |
| } |
| |
| return MHD_YES; |
| } |
| |
| static int request_parse_arguments( |
| RequestMeta *m, |
| struct MHD_Connection *connection) { |
| |
| assert(m); |
| assert(connection); |
| |
| m->argument_parse_error = 0; |
| MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); |
| |
| return m->argument_parse_error; |
| } |
| |
| static int request_handler_entries( |
| struct MHD_Connection *connection, |
| void *connection_cls) { |
| |
| struct MHD_Response *response; |
| RequestMeta *m = connection_cls; |
| int r; |
| |
| assert(connection); |
| assert(m); |
| |
| r = open_journal(m); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
| |
| if (request_parse_accept(m, connection) < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
| |
| if (request_parse_range(m, connection) < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header."); |
| |
| if (request_parse_arguments(m, connection) < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments."); |
| |
| if (m->discrete) { |
| if (!m->cursor) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification."); |
| |
| m->n_entries = 1; |
| m->n_entries_set = true; |
| } |
| |
| if (m->cursor) |
| r = sd_journal_seek_cursor(m->journal, m->cursor); |
| else if (m->n_skip >= 0) |
| r = sd_journal_seek_head(m->journal); |
| else if (m->n_skip < 0) |
| r = sd_journal_seek_tail(m->journal); |
| if (r < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal."); |
| |
| response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); |
| if (!response) |
| return respond_oom(connection); |
| |
| MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); |
| |
| r = MHD_queue_response(connection, MHD_HTTP_OK, response); |
| MHD_destroy_response(response); |
| |
| return r; |
| } |
| |
| static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
| const char *eq; |
| size_t j; |
| |
| eq = memchr(d, '=', l); |
| if (!eq) |
| return -EINVAL; |
| |
| j = l - (eq - d + 1); |
| |
| if (m == OUTPUT_JSON) { |
| fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); |
| json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); |
| fputs(" }\n", f); |
| } else { |
| fwrite(eq+1, 1, j, f); |
| fputc('\n', f); |
| } |
| |
| return 0; |
| } |
| |
| static ssize_t request_reader_fields( |
| void *cls, |
| uint64_t pos, |
| char *buf, |
| size_t max) { |
| |
| RequestMeta *m = cls; |
| int r; |
| size_t n, k; |
| |
| assert(m); |
| assert(buf); |
| assert(max > 0); |
| assert(pos >= m->delta); |
| |
| pos -= m->delta; |
| |
| while (pos >= m->size) { |
| off_t sz; |
| const void *d; |
| size_t l; |
| |
| /* End of this field, so let's serialize the next |
| * one */ |
| |
| if (m->n_fields_set && |
| m->n_fields <= 0) |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| |
| r = sd_journal_enumerate_unique(m->journal, &d, &l); |
| if (r < 0) { |
| log_error_errno(r, "Failed to advance field index: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } else if (r == 0) |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| |
| pos -= m->size; |
| m->delta += m->size; |
| |
| if (m->n_fields_set) |
| m->n_fields -= 1; |
| |
| r = request_meta_ensure_tmp(m); |
| if (r < 0) { |
| log_error_errno(r, "Failed to create temporary file: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| r = output_field(m->tmp, m->mode, d, l); |
| if (r < 0) { |
| log_error_errno(r, "Failed to serialize item: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| sz = ftello(m->tmp); |
| if (sz == (off_t) -1) { |
| log_error_errno(errno, "Failed to retrieve file position: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| m->size = (uint64_t) sz; |
| } |
| |
| if (fseeko(m->tmp, pos, SEEK_SET) < 0) { |
| log_error_errno(errno, "Failed to seek to position: %m"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| n = m->size - pos; |
| if (n > max) |
| n = max; |
| |
| errno = 0; |
| k = fread(buf, 1, n, m->tmp); |
| if (k != n) { |
| log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| } |
| |
| return (ssize_t) k; |
| } |
| |
| static int request_handler_fields( |
| struct MHD_Connection *connection, |
| const char *field, |
| void *connection_cls) { |
| |
| struct MHD_Response *response; |
| RequestMeta *m = connection_cls; |
| int r; |
| |
| assert(connection); |
| assert(m); |
| |
| r = open_journal(m); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
| |
| if (request_parse_accept(m, connection) < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
| |
| r = sd_journal_query_unique(m->journal, field); |
| if (r < 0) |
| return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields."); |
| |
| response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); |
| if (!response) |
| return respond_oom(connection); |
| |
| MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); |
| |
| r = MHD_queue_response(connection, MHD_HTTP_OK, response); |
| MHD_destroy_response(response); |
| |
| return r; |
| } |
| |
| static int request_handler_redirect( |
| struct MHD_Connection *connection, |
| const char *target) { |
| |
| char *page; |
| struct MHD_Response *response; |
| int ret; |
| |
| assert(connection); |
| assert(target); |
| |
| if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) |
| return respond_oom(connection); |
| |
| response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); |
| if (!response) { |
| free(page); |
| return respond_oom(connection); |
| } |
| |
| MHD_add_response_header(response, "Content-Type", "text/html"); |
| MHD_add_response_header(response, "Location", target); |
| |
| ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); |
| MHD_destroy_response(response); |
| |
| return ret; |
| } |
| |
| static int request_handler_file( |
| struct MHD_Connection *connection, |
| const char *path, |
| const char *mime_type) { |
| |
| struct MHD_Response *response; |
| int ret; |
| _cleanup_close_ int fd = -1; |
| struct stat st; |
| |
| assert(connection); |
| assert(path); |
| assert(mime_type); |
| |
| fd = open(path, O_RDONLY|O_CLOEXEC); |
| if (fd < 0) |
| return mhd_respondf(connection, errno, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m", path); |
| |
| if (fstat(fd, &st) < 0) |
| return mhd_respondf(connection, errno, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m"); |
| |
| response = MHD_create_response_from_fd_at_offset64(st.st_size, fd, 0); |
| if (!response) |
| return respond_oom(connection); |
| |
| fd = -1; |
| |
| MHD_add_response_header(response, "Content-Type", mime_type); |
| |
| ret = MHD_queue_response(connection, MHD_HTTP_OK, response); |
| MHD_destroy_response(response); |
| |
| return ret; |
| } |
| |
| static int get_virtualization(char **v) { |
| _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL; |
| char *b = NULL; |
| int r; |
| |
| r = sd_bus_default_system(&bus); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_get_property_string( |
| bus, |
| "org.freedesktop.systemd1", |
| "/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "Virtualization", |
| NULL, |
| &b); |
| if (r < 0) |
| return r; |
| |
| if (isempty(b)) { |
| free(b); |
| *v = NULL; |
| return 0; |
| } |
| |
| *v = b; |
| return 1; |
| } |
| |
| static int request_handler_machine( |
| struct MHD_Connection *connection, |
| void *connection_cls) { |
| |
| struct MHD_Response *response; |
| RequestMeta *m = connection_cls; |
| int r; |
| _cleanup_free_ char* hostname = NULL, *os_name = NULL; |
| uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; |
| char *json; |
| sd_id128_t mid, bid; |
| _cleanup_free_ char *v = NULL; |
| |
| assert(connection); |
| assert(m); |
| |
| r = open_journal(m); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
| |
| r = sd_id128_get_machine(&mid); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %m"); |
| |
| r = sd_id128_get_boot(&bid); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %m"); |
| |
| hostname = gethostname_malloc(); |
| if (!hostname) |
| return respond_oom(connection); |
| |
| r = sd_journal_get_usage(m->journal, &usage); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
| |
| r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); |
| if (r < 0) |
| return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
| |
| if (parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL) == -ENOENT) |
| (void) parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); |
| |
| get_virtualization(&v); |
| |
| r = asprintf(&json, |
| "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," |
| "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," |
| "\"hostname\" : \"%s\"," |
| "\"os_pretty_name\" : \"%s\"," |
| "\"virtualization\" : \"%s\"," |
| "\"usage\" : \"%"PRIu64"\"," |
| "\"cutoff_from_realtime\" : \"%"PRIu64"\"," |
| "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", |
| SD_ID128_FORMAT_VAL(mid), |
| SD_ID128_FORMAT_VAL(bid), |
| hostname_cleanup(hostname), |
| os_name ? os_name : "Linux", |
| v ? v : "bare", |
| usage, |
| cutoff_from, |
| cutoff_to); |
| |
| if (r < 0) |
| return respond_oom(connection); |
| |
| response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); |
| if (!response) { |
| free(json); |
| return respond_oom(connection); |
| } |
| |
| MHD_add_response_header(response, "Content-Type", "application/json"); |
| r = MHD_queue_response(connection, MHD_HTTP_OK, response); |
| MHD_destroy_response(response); |
| |
| return r; |
| } |
| |
| static int 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) { |
| int r, code; |
| |
| assert(connection); |
| assert(connection_cls); |
| assert(url); |
| assert(method); |
| |
| if (!streq(method, "GET")) |
| return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); |
| |
| |
| if (!*connection_cls) { |
| if (!request_meta(connection_cls)) |
| return respond_oom(connection); |
| return MHD_YES; |
| } |
| |
| if (arg_trust_pem) { |
| r = check_permissions(connection, &code, NULL); |
| if (r < 0) |
| return code; |
| } |
| |
| if (streq(url, "/")) |
| return request_handler_redirect(connection, "/browse"); |
| |
| if (streq(url, "/entries")) |
| return request_handler_entries(connection, *connection_cls); |
| |
| if (startswith(url, "/fields/")) |
| return request_handler_fields(connection, url + 8, *connection_cls); |
| |
| if (streq(url, "/browse")) |
| return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); |
| |
| if (streq(url, "/machine")) |
| return request_handler_machine(connection, *connection_cls); |
| |
| return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); |
| } |
| |
| static void help(void) { |
| printf("%s [OPTIONS...] ...\n\n" |
| "HTTP server for journal events.\n\n" |
| " -h --help Show this help\n" |
| " --version Show package version\n" |
| " --cert=CERT.PEM Server certificate in PEM format\n" |
| " --key=KEY.PEM Server key in PEM format\n" |
| " --trust=CERT.PEM Certificate authority certificate in PEM format\n" |
| " -D --directory=PATH Serve journal files in directory\n", |
| program_invocation_short_name); |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| enum { |
| ARG_VERSION = 0x100, |
| ARG_KEY, |
| ARG_CERT, |
| ARG_TRUST, |
| }; |
| |
| int r, c; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "key", required_argument, NULL, ARG_KEY }, |
| { "cert", required_argument, NULL, ARG_CERT }, |
| { "trust", required_argument, NULL, ARG_TRUST }, |
| { "directory", required_argument, NULL, 'D' }, |
| {} |
| }; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "hD:", options, NULL)) >= 0) |
| |
| switch(c) { |
| |
| case 'h': |
| help(); |
| return 0; |
| |
| case ARG_VERSION: |
| return version(); |
| |
| case ARG_KEY: |
| if (arg_key_pem) { |
| log_error("Key file specified twice"); |
| return -EINVAL; |
| } |
| r = read_full_file(optarg, &arg_key_pem, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to read key file: %m"); |
| assert(arg_key_pem); |
| break; |
| |
| case ARG_CERT: |
| if (arg_cert_pem) { |
| log_error("Certificate file specified twice"); |
| return -EINVAL; |
| } |
| r = read_full_file(optarg, &arg_cert_pem, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to read certificate file: %m"); |
| assert(arg_cert_pem); |
| break; |
| |
| case ARG_TRUST: |
| #if HAVE_GNUTLS |
| if (arg_trust_pem) { |
| log_error("CA certificate file specified twice"); |
| return -EINVAL; |
| } |
| r = read_full_file(optarg, &arg_trust_pem, NULL); |
| if (r < 0) |
| return log_error_errno(r, "Failed to read CA certificate file: %m"); |
| assert(arg_trust_pem); |
| break; |
| #else |
| log_error("Option --trust is not available."); |
| return -EINVAL; |
| #endif |
| case 'D': |
| arg_directory = optarg; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unhandled option"); |
| } |
| |
| if (optind < argc) { |
| log_error("This program does not take arguments."); |
| return -EINVAL; |
| } |
| |
| if (!!arg_key_pem != !!arg_cert_pem) { |
| log_error("Certificate and key files must be specified together"); |
| return -EINVAL; |
| } |
| |
| if (arg_trust_pem && !arg_key_pem) { |
| log_error("CA certificate can only be used with certificate file"); |
| return -EINVAL; |
| } |
| |
| return 1; |
| } |
| |
| int main(int argc, char *argv[]) { |
| struct MHD_Daemon *d = NULL; |
| int r, n; |
| |
| log_set_target(LOG_TARGET_AUTO); |
| log_parse_environment(); |
| log_open(); |
| |
| r = parse_argv(argc, argv); |
| if (r < 0) |
| return EXIT_FAILURE; |
| if (r == 0) |
| return EXIT_SUCCESS; |
| |
| sigbus_install(); |
| |
| r = setup_gnutls_logger(NULL); |
| if (r < 0) |
| return EXIT_FAILURE; |
| |
| n = sd_listen_fds(1); |
| if (n < 0) { |
| log_error_errno(n, "Failed to determine passed sockets: %m"); |
| goto finish; |
| } else if (n > 1) { |
| log_error("Can't listen on more than one socket."); |
| goto finish; |
| } else { |
| struct MHD_OptionItem opts[] = { |
| { MHD_OPTION_NOTIFY_COMPLETED, |
| (intptr_t) request_meta_free, NULL }, |
| { MHD_OPTION_EXTERNAL_LOGGER, |
| (intptr_t) microhttpd_logger, NULL }, |
| { MHD_OPTION_END, 0, NULL }, |
| { MHD_OPTION_END, 0, NULL }, |
| { MHD_OPTION_END, 0, NULL }, |
| { MHD_OPTION_END, 0, NULL }, |
| { MHD_OPTION_END, 0, NULL }}; |
| int opts_pos = 2; |
| |
| /* We force MHD_USE_ITC here, in order to make sure |
| * libmicrohttpd doesn't use shutdown() on our listening |
| * socket, which would break socket re-activation. See |
| * |
| * https://lists.gnu.org/archive/html/libmicrohttpd/2015-09/msg00014.html |
| * https://github.com/systemd/systemd/pull/1286 |
| */ |
| |
| int flags = |
| MHD_USE_DEBUG | |
| MHD_USE_DUAL_STACK | |
| MHD_USE_ITC | |
| MHD_USE_POLL_INTERNAL_THREAD | |
| MHD_USE_THREAD_PER_CONNECTION; |
| |
| if (n > 0) |
| opts[opts_pos++] = (struct MHD_OptionItem) |
| {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; |
| if (arg_key_pem) { |
| assert(arg_cert_pem); |
| opts[opts_pos++] = (struct MHD_OptionItem) |
| {MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem}; |
| opts[opts_pos++] = (struct MHD_OptionItem) |
| {MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem}; |
| flags |= MHD_USE_TLS; |
| } |
| if (arg_trust_pem) { |
| assert(flags & MHD_USE_TLS); |
| opts[opts_pos++] = (struct MHD_OptionItem) |
| {MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem}; |
| } |
| |
| d = MHD_start_daemon(flags, 19531, |
| NULL, NULL, |
| request_handler, NULL, |
| MHD_OPTION_ARRAY, opts, |
| MHD_OPTION_END); |
| } |
| |
| if (!d) { |
| log_error("Failed to start daemon!"); |
| goto finish; |
| } |
| |
| pause(); |
| |
| r = EXIT_SUCCESS; |
| |
| finish: |
| if (d) |
| MHD_stop_daemon(d); |
| |
| return r; |
| } |