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-rw-r--r--src/journal-remote/journal-gatewayd.c1045
1 files changed, 1045 insertions, 0 deletions
diff --git a/src/journal-remote/journal-gatewayd.c b/src/journal-remote/journal-gatewayd.c
new file mode 100644
index 0000000..af45fa5
--- /dev/null
+++ b/src/journal-remote/journal-gatewayd.c
@@ -0,0 +1,1045 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#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 "main-func.h"
+#include "microhttpd-util.h"
+#include "os-util.h"
+#include "parse-util.h"
+#include "pretty-print.h"
+#include "sigbus.h"
+#include "tmpfile-util.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 const char *arg_directory = NULL;
+
+STATIC_DESTRUCTOR_REGISTER(arg_key_pem, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_cert_pem, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_trust_pem, freep);
+
+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_JSON_SEQ] = "application/json-seq",
+ [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 = show_journal_entry(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_JSON_SEQ]))
+ m->mode = OUTPUT_JSON_SEQ;
+ 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) {
+
+ _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL;
+ 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]);
+ return MHD_queue_response(connection, MHD_HTTP_OK, response);
+}
+
+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) {
+
+ _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL;
+ 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]);
+ return MHD_queue_response(connection, MHD_HTTP_OK, response);
+}
+
+static int request_handler_redirect(
+ struct MHD_Connection *connection,
+ const char *target) {
+
+ char *page;
+ _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL;
+
+ 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);
+ return MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response);
+}
+
+static int request_handler_file(
+ struct MHD_Connection *connection,
+ const char *path,
+ const char *mime_type) {
+
+ _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL;
+ _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);
+ TAKE_FD(fd);
+
+ MHD_add_response_header(response, "Content-Type", mime_type);
+ return MHD_queue_response(connection, MHD_HTTP_OK, response);
+}
+
+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) {
+
+ _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL;
+ RequestMeta *m = connection_cls;
+ int r;
+ _cleanup_free_ char* hostname = NULL, *os_name = NULL;
+ uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0;
+ sd_id128_t mid, bid;
+ _cleanup_free_ char *v = NULL, *json = 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");
+
+ (void) parse_os_release(NULL, "PRETTY_NAME", &os_name, NULL);
+ (void) 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)
+ return respond_oom(connection);
+ TAKE_PTR(json);
+
+ MHD_add_response_header(response, "Content-Type", "application/json");
+ return MHD_queue_response(connection, MHD_HTTP_OK, response);
+}
+
+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 int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-journal-gatewayd.service", "8", &link);
+ if (r < 0)
+ return log_oom();
+
+ 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"
+ "\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_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':
+ return help();
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_KEY:
+ if (arg_key_pem)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Key file specified twice");
+ 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)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Certificate file specified twice");
+ 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)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "CA certificate file specified twice");
+ 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
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Option --trust is not available.");
+#endif
+ case 'D':
+ arg_directory = optarg;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (optind < argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "This program does not take arguments.");
+
+ if (!!arg_key_pem != !!arg_cert_pem)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Certificate and key files must be specified together");
+
+ if (arg_trust_pem && !arg_key_pem)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "CA certificate can only be used with certificate file");
+
+ return 1;
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(MHD_stop_daemonp) struct MHD_Daemon *d = NULL;
+ 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;
+ int r, n;
+
+ log_setup_service();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ sigbus_install();
+
+ r = setup_gnutls_logger(NULL);
+ if (r < 0)
+ return r;
+
+ n = sd_listen_fds(1);
+ if (n < 0)
+ return log_error_errno(n, "Failed to determine passed sockets: %m");
+ if (n > 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Can't listen on more than one socket.");
+
+ if (n == 1)
+ 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)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to start daemon!");
+
+ pause();
+
+ return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 12:53:02 +0000