1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/inotify.h>
28 #include "sd-journal.h"
29 #include "journal-def.h"
30 #include "journal-file.h"
35 #include "journal-internal.h"
37 #define JOURNAL_FILES_MAX 1024
39 static void detach_location(sd_journal *j) {
45 j->current_file = NULL;
48 HASHMAP_FOREACH(f, j->files, i)
49 f->current_offset = 0;
52 static void reset_location(sd_journal *j) {
56 zero(j->current_location);
59 static void init_location(Location *l, JournalFile *f, Object *o) {
62 assert(o->object.type == OBJECT_ENTRY);
64 l->type = LOCATION_DISCRETE;
65 l->seqnum = le64toh(o->entry.seqnum);
66 l->seqnum_id = f->header->seqnum_id;
67 l->realtime = le64toh(o->entry.realtime);
68 l->monotonic = le64toh(o->entry.monotonic);
69 l->boot_id = le64toh(o->entry.boot_id);
70 l->xor_hash = le64toh(o->entry.xor_hash);
72 l->seqnum_set = l->realtime_set = l->monotonic_set = l->xor_hash_set = true;
75 static void set_location(sd_journal *j, JournalFile *f, Object *o, uint64_t offset) {
80 init_location(&j->current_location, f, o);
85 f->current_offset = offset;
88 static int same_field(const void *_a, size_t s, const void *_b, size_t t) {
89 const uint8_t *a = _a, *b = _b;
91 bool a_good = false, b_good = false, different = false;
93 for (j = 0; j < s && j < t; j++) {
102 if (a_good && b_good)
103 return different ? 0 : 1;
109 _public_ int sd_journal_add_match(sd_journal *j, const void *data, size_t size) {
110 Match *m, *after = NULL;
120 le_hash = htole64(hash64(data, size));
122 LIST_FOREACH(matches, m, j->matches) {
125 if (m->le_hash == le_hash &&
127 memcmp(m->data, data, size) == 0)
130 r = same_field(data, size, m->data, m->size);
143 m->data = malloc(m->size);
149 memcpy(m->data, data, size);
150 m->le_hash = le_hash;
152 /* Matches for the same fields we order adjacent to each
154 LIST_INSERT_AFTER(Match, matches, j->matches, after, m);
162 _public_ void sd_journal_flush_matches(sd_journal *j) {
167 Match *m = j->matches;
169 LIST_REMOVE(Match, matches, j->matches, m);
179 static int compare_order(JournalFile *af, Object *ao,
180 JournalFile *bf, Object *bo) {
189 /* We operate on two different files here, hence we can access
190 * two objects at the same time, which we normally can't.
192 * If contents and timestamps match, these entries are
193 * identical, even if the seqnum does not match */
195 if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id) &&
196 ao->entry.monotonic == bo->entry.monotonic &&
197 ao->entry.realtime == bo->entry.realtime &&
198 ao->entry.xor_hash == bo->entry.xor_hash)
201 if (sd_id128_equal(af->header->seqnum_id, bf->header->seqnum_id)) {
203 /* If this is from the same seqnum source, compare
205 a = le64toh(ao->entry.seqnum);
206 b = le64toh(bo->entry.seqnum);
213 /* Wow! This is weird, different data but the same
214 * seqnums? Something is borked, but let's make the
215 * best of it and compare by time. */
218 if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id)) {
220 /* If the boot id matches compare monotonic time */
221 a = le64toh(ao->entry.monotonic);
222 b = le64toh(bo->entry.monotonic);
230 /* Otherwise compare UTC time */
231 a = le64toh(ao->entry.realtime);
232 b = le64toh(ao->entry.realtime);
239 /* Finally, compare by contents */
240 a = le64toh(ao->entry.xor_hash);
241 b = le64toh(ao->entry.xor_hash);
251 static int compare_with_location(JournalFile *af, Object *ao, Location *l) {
257 assert(l->type == LOCATION_DISCRETE);
259 if (l->monotonic_set &&
260 sd_id128_equal(ao->entry.boot_id, l->boot_id) &&
262 le64toh(ao->entry.realtime) == l->realtime &&
264 le64toh(ao->entry.xor_hash) == l->xor_hash)
268 sd_id128_equal(af->header->seqnum_id, l->seqnum_id)) {
270 a = le64toh(ao->entry.seqnum);
278 if (l->monotonic_set &&
279 sd_id128_equal(ao->entry.boot_id, l->boot_id)) {
281 a = le64toh(ao->entry.monotonic);
283 if (a < l->monotonic)
285 if (a > l->monotonic)
289 if (l->realtime_set) {
291 a = le64toh(ao->entry.realtime);
299 if (l->xor_hash_set) {
300 a = le64toh(ao->entry.xor_hash);
311 static int find_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
319 /* No matches is simple */
321 if (j->current_location.type == LOCATION_HEAD)
322 r = journal_file_next_entry(f, NULL, 0, DIRECTION_DOWN, &o, &p);
323 else if (j->current_location.type == LOCATION_TAIL)
324 r = journal_file_next_entry(f, NULL, 0, DIRECTION_UP, &o, &p);
325 else if (j->current_location.seqnum_set &&
326 sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
327 r = journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, &o, &p);
328 else if (j->current_location.monotonic_set)
329 r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p);
330 else if (j->current_location.realtime_set)
331 r = journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, &o, &p);
333 r = journal_file_next_entry(f, NULL, 0, direction, &o, &p);
339 Match *m, *term_match = NULL;
343 /* We have matches, first, let's jump to the monotonic
344 * position if we have any, since it implies a
347 if (j->current_location.type == LOCATION_DISCRETE &&
348 j->current_location.monotonic_set) {
350 r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p);
352 return r == -ENOENT ? 0 : r;
355 LIST_FOREACH(matches, m, j->matches) {
359 r = journal_file_find_data_object_with_hash(f, m->data, m->size, m->le_hash, &d, &dp);
363 if (j->current_location.type == LOCATION_HEAD)
364 r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, &c, &cp);
365 else if (j->current_location.type == LOCATION_TAIL)
366 r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, &c, &cp);
367 else if (j->current_location.seqnum_set &&
368 sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
369 r = journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, &c, &cp);
370 else if (j->current_location.realtime_set)
371 r = journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, &c, &cp);
373 r = journal_file_next_entry_for_data(f, NULL, 0, dp, direction, &c, &cp);
385 } else if (same_field(term_match->data, term_match->size, m->data, m->size)) {
387 /* Same field as previous match... */
390 /* Find the earliest of the OR matches */
393 (direction == DIRECTION_DOWN && cp < tp) ||
394 (direction == DIRECTION_UP && cp > tp)) {
403 /* Previous term is finished, did anything match? */
407 /* Find the last of the AND matches */
409 (direction == DIRECTION_DOWN && tp > p) ||
410 (direction == DIRECTION_UP && tp < p)) {
427 /* Last term is finished, did anything match? */
432 (direction == DIRECTION_DOWN && tp > p) ||
433 (direction == DIRECTION_UP && tp < p)) {
451 static int next_with_matches(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
465 /* No matches is easy */
467 r = journal_file_next_entry(f, c, cp, direction, &c, &cp);
478 /* So there are matches we have to adhere to, let's find the
479 * first entry that matches all of them */
483 bool found, term_result = false;
484 Match *m, *term_match = NULL;
487 n = journal_file_entry_n_items(c);
489 /* Make sure we don't match the entry we are starting
491 found = cp != *offset;
494 LIST_FOREACH(matches, m, j->matches) {
498 /* Let's check if this is the beginning of a
499 * new term, i.e. has a different field prefix
500 * as the preceeding match. */
504 } else if (!same_field(term_match->data, term_match->size, m->data, m->size)) {
512 for (k = 0; k < n; k++)
513 if (c->entry.items[k].hash == m->le_hash)
517 /* Hmm, didn't find any field that
518 * matched this rule, so ignore this
519 * match. Go on with next match */
525 /* Hmm, so, this field matched, let's remember
526 * where we'd have to try next, in case the other
527 * matches are not OK */
529 r = journal_file_next_entry_for_data(f, c, cp, le64toh(c->entry.items[k].object_offset), direction, &qo, &q);
535 if (direction == DIRECTION_DOWN) {
541 if (np == 0 || q < np) {
549 /* Check the last term */
550 if (term_match && !term_result)
553 /* Did this entry match against all matches? */
562 /* Did we find a subsequent entry? */
566 /* Hmm, ok, this entry only matched partially, so
567 * let's try another one */
573 static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
576 int compare_value, r;
581 if (f->current_offset > 0) {
582 cp = f->current_offset;
584 r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c);
588 r = next_with_matches(j, f, direction, &c, &cp);
594 r = find_location(j, f, direction, &c, &cp);
604 if (j->current_location.type == LOCATION_DISCRETE) {
607 k = compare_with_location(f, c, &j->current_location);
608 if (direction == DIRECTION_DOWN)
609 found = k >= compare_value;
611 found = k <= -compare_value;
623 r = next_with_matches(j, f, direction, &c, &cp);
629 static int real_journal_next(sd_journal *j, direction_t direction) {
630 JournalFile *f, *new_current = NULL;
633 uint64_t new_offset = 0;
634 Object *new_entry = NULL;
639 HASHMAP_FOREACH(f, j->files, i) {
644 r = next_beyond_location(j, f, direction, &o, &p);
655 k = compare_order(f, o, new_current, new_entry);
657 if (direction == DIRECTION_DOWN)
673 set_location(j, new_current, new_entry, new_offset);
678 _public_ int sd_journal_next(sd_journal *j) {
679 return real_journal_next(j, DIRECTION_DOWN);
682 _public_ int sd_journal_previous(sd_journal *j) {
683 return real_journal_next(j, DIRECTION_UP);
686 static int real_journal_next_skip(sd_journal *j, direction_t direction, uint64_t skip) {
693 /* If this is not a discrete skip, then at least
694 * resolve the current location */
695 if (j->current_location.type != LOCATION_DISCRETE)
696 return real_journal_next(j, direction);
702 r = real_journal_next(j, direction);
716 _public_ int sd_journal_next_skip(sd_journal *j, uint64_t skip) {
717 return real_journal_next_skip(j, DIRECTION_DOWN, skip);
720 _public_ int sd_journal_previous_skip(sd_journal *j, uint64_t skip) {
721 return real_journal_next_skip(j, DIRECTION_UP, skip);
724 _public_ int sd_journal_get_cursor(sd_journal *j, char **cursor) {
727 char bid[33], sid[33];
734 if (!j->current_file || j->current_file->current_offset <= 0)
735 return -EADDRNOTAVAIL;
737 r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o);
741 sd_id128_to_string(j->current_file->header->seqnum_id, sid);
742 sd_id128_to_string(o->entry.boot_id, bid);
745 "s=%s;i=%llx;b=%s;m=%llx;t=%llx;x=%llx;p=%s",
746 sid, (unsigned long long) le64toh(o->entry.seqnum),
747 bid, (unsigned long long) le64toh(o->entry.monotonic),
748 (unsigned long long) le64toh(o->entry.realtime),
749 (unsigned long long) le64toh(o->entry.xor_hash),
750 file_name_from_path(j->current_file->path)) < 0)
756 _public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) {
760 unsigned long long seqnum, monotonic, realtime, xor_hash;
762 seqnum_id_set = false,
765 monotonic_set = false,
766 realtime_set = false,
767 xor_hash_set = false;
768 sd_id128_t seqnum_id, boot_id;
775 FOREACH_WORD_SEPARATOR(w, l, cursor, ";", state) {
779 if (l < 2 || w[1] != '=')
782 item = strndup(w, l);
789 seqnum_id_set = true;
790 k = sd_id128_from_string(w+2, &seqnum_id);
795 if (sscanf(w+2, "%llx", &seqnum) != 1)
801 k = sd_id128_from_string(w+2, &boot_id);
805 monotonic_set = true;
806 if (sscanf(w+2, "%llx", &monotonic) != 1)
812 if (sscanf(w+2, "%llx", &realtime) != 1)
818 if (sscanf(w+2, "%llx", &xor_hash) != 1)
829 if ((!seqnum_set || !seqnum_id_set) &&
830 (!monotonic_set || !boot_id_set) &&
836 j->current_location.type = LOCATION_DISCRETE;
839 j->current_location.realtime = (uint64_t) realtime;
840 j->current_location.realtime_set = true;
843 if (seqnum_set && seqnum_id_set) {
844 j->current_location.seqnum = (uint64_t) seqnum;
845 j->current_location.seqnum_id = seqnum_id;
846 j->current_location.seqnum_set = true;
849 if (monotonic_set && boot_id_set) {
850 j->current_location.monotonic = (uint64_t) monotonic;
851 j->current_location.boot_id = boot_id;
852 j->current_location.monotonic_set = true;
856 j->current_location.xor_hash = (uint64_t) xor_hash;
857 j->current_location.xor_hash_set = true;
863 _public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) {
868 j->current_location.type = LOCATION_DISCRETE;
869 j->current_location.boot_id = boot_id;
870 j->current_location.monotonic = usec;
871 j->current_location.monotonic_set = true;
876 _public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) {
881 j->current_location.type = LOCATION_DISCRETE;
882 j->current_location.realtime = usec;
883 j->current_location.realtime_set = true;
888 _public_ int sd_journal_seek_head(sd_journal *j) {
893 j->current_location.type = LOCATION_HEAD;
898 _public_ int sd_journal_seek_tail(sd_journal *j) {
903 j->current_location.type = LOCATION_TAIL;
908 static int add_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
917 if ((j->flags & SD_JOURNAL_SYSTEM_ONLY) &&
918 !startswith(filename, "system.journal"))
922 fn = join(prefix, "/", dir, "/", filename, NULL);
924 fn = join(prefix, "/", filename, NULL);
929 if (hashmap_get(j->files, fn)) {
934 if (hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
935 log_debug("Too many open journal files, not adding %s, ignoring.", fn);
940 r = journal_file_open(fn, O_RDONLY, 0, NULL, &f);
950 /* journal_file_dump(f); */
952 r = hashmap_put(j->files, f->path, f);
954 journal_file_close(f);
958 log_debug("File %s got added.", f->path);
963 static int remove_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
972 fn = join(prefix, "/", dir, "/", filename, NULL);
974 fn = join(prefix, "/", filename, NULL);
979 f = hashmap_get(j->files, fn);
985 hashmap_remove(j->files, f->path);
986 journal_file_close(f);
988 log_debug("File %s got removed.", f->path);
992 static int add_directory(sd_journal *j, const char *prefix, const char *dir) {
1003 if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
1004 (sd_id128_from_string(dir, &id) < 0 ||
1005 sd_id128_get_machine(&mid) < 0 ||
1006 !sd_id128_equal(id, mid)))
1009 fn = join(prefix, "/", dir, NULL);
1017 if (errno == ENOENT)
1023 wd = inotify_add_watch(j->inotify_fd, fn,
1024 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1025 IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|
1026 IN_DONT_FOLLOW|IN_ONLYDIR);
1028 if (hashmap_put(j->inotify_wd_dirs, INT_TO_PTR(wd), fn) < 0)
1029 inotify_rm_watch(j->inotify_fd, wd);
1037 struct dirent buf, *de;
1039 r = readdir_r(d, &buf, &de);
1043 if (!dirent_is_file_with_suffix(de, ".journal"))
1046 r = add_file(j, prefix, dir, de->d_name);
1048 log_debug("Failed to add file %s/%s/%s: %s", prefix, dir, de->d_name, strerror(-r));
1053 log_debug("Directory %s/%s got added.", prefix, dir);
1058 static void remove_directory_wd(sd_journal *j, int wd) {
1064 if (j->inotify_fd >= 0)
1065 inotify_rm_watch(j->inotify_fd, wd);
1067 p = hashmap_remove(j->inotify_wd_dirs, INT_TO_PTR(wd));
1070 log_debug("Directory %s got removed.", p);
1075 static void add_root_wd(sd_journal *j, const char *p) {
1082 wd = inotify_add_watch(j->inotify_fd, p,
1083 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1084 IN_DONT_FOLLOW|IN_ONLYDIR);
1089 if (!k || hashmap_put(j->inotify_wd_roots, INT_TO_PTR(wd), k) < 0) {
1090 inotify_rm_watch(j->inotify_fd, wd);
1095 static void remove_root_wd(sd_journal *j, int wd) {
1101 if (j->inotify_fd >= 0)
1102 inotify_rm_watch(j->inotify_fd, wd);
1104 p = hashmap_remove(j->inotify_wd_roots, INT_TO_PTR(wd));
1107 log_debug("Root %s got removed.", p);
1112 _public_ int sd_journal_open(sd_journal **ret, int flags) {
1115 const char search_paths[] =
1116 "/run/log/journal\0"
1117 "/var/log/journal\0";
1123 if (flags & ~(SD_JOURNAL_LOCAL_ONLY|
1124 SD_JOURNAL_RUNTIME_ONLY|
1125 SD_JOURNAL_SYSTEM_ONLY))
1128 j = new0(sd_journal, 1);
1134 j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
1135 if (j->inotify_fd < 0) {
1140 j->files = hashmap_new(string_hash_func, string_compare_func);
1146 j->inotify_wd_dirs = hashmap_new(trivial_hash_func, trivial_compare_func);
1147 j->inotify_wd_roots = hashmap_new(trivial_hash_func, trivial_compare_func);
1149 if (!j->inotify_wd_dirs || !j->inotify_wd_roots) {
1154 /* We ignore most errors here, since the idea is to only open
1155 * what's actually accessible, and ignore the rest. */
1157 NULSTR_FOREACH(p, search_paths) {
1160 if ((flags & SD_JOURNAL_RUNTIME_ONLY) &&
1161 !path_startswith(p, "/run"))
1166 if (errno != ENOENT)
1167 log_debug("Failed to open %s: %m", p);
1174 struct dirent buf, *de;
1177 r = readdir_r(d, &buf, &de);
1181 if (dirent_is_file_with_suffix(de, ".journal")) {
1182 r = add_file(j, p, NULL, de->d_name);
1184 log_debug("Failed to add file %s/%s: %s", p, de->d_name, strerror(-r));
1186 } else if ((de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) &&
1187 sd_id128_from_string(de->d_name, &id) >= 0) {
1189 r = add_directory(j, p, de->d_name);
1191 log_debug("Failed to add directory %s/%s: %s", p, de->d_name, strerror(-r));
1202 sd_journal_close(j);
1207 _public_ void sd_journal_close(sd_journal *j) {
1211 if (j->inotify_wd_dirs) {
1214 while ((k = hashmap_first_key(j->inotify_wd_dirs)))
1215 remove_directory_wd(j, PTR_TO_INT(k));
1217 hashmap_free(j->inotify_wd_dirs);
1220 if (j->inotify_wd_roots) {
1223 while ((k = hashmap_first_key(j->inotify_wd_roots)))
1224 remove_root_wd(j, PTR_TO_INT(k));
1226 hashmap_free(j->inotify_wd_roots);
1232 while ((f = hashmap_steal_first(j->files)))
1233 journal_file_close(f);
1235 hashmap_free(j->files);
1238 sd_journal_flush_matches(j);
1240 if (j->inotify_fd >= 0)
1241 close_nointr_nofail(j->inotify_fd);
1246 _public_ int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) {
1256 f = j->current_file;
1258 return -EADDRNOTAVAIL;
1260 if (f->current_offset <= 0)
1261 return -EADDRNOTAVAIL;
1263 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1267 *ret = le64toh(o->entry.realtime);
1271 _public_ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) {
1282 f = j->current_file;
1284 return -EADDRNOTAVAIL;
1286 if (f->current_offset <= 0)
1287 return -EADDRNOTAVAIL;
1289 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1294 *ret_boot_id = o->entry.boot_id;
1296 r = sd_id128_get_boot(&id);
1300 if (!sd_id128_equal(id, o->entry.boot_id))
1304 *ret = le64toh(o->entry.monotonic);
1308 _public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) {
1311 size_t field_length;
1324 if (isempty(field) || strchr(field, '='))
1327 f = j->current_file;
1329 return -EADDRNOTAVAIL;
1331 if (f->current_offset <= 0)
1332 return -EADDRNOTAVAIL;
1334 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1338 field_length = strlen(field);
1340 n = journal_file_entry_n_items(o);
1341 for (i = 0; i < n; i++) {
1342 uint64_t p, l, le_hash;
1345 p = le64toh(o->entry.items[i].object_offset);
1346 le_hash = o->entry.items[i].hash;
1347 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1351 if (le_hash != o->data.hash)
1354 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1356 if (o->object.flags & OBJECT_COMPRESSED) {
1359 if (uncompress_startswith(o->data.payload, l,
1360 &f->compress_buffer, &f->compress_buffer_size,
1361 field, field_length, '=')) {
1365 if (!uncompress_blob(o->data.payload, l,
1366 &f->compress_buffer, &f->compress_buffer_size, &rsize))
1369 *data = f->compress_buffer;
1370 *size = (size_t) rsize;
1375 return -EPROTONOSUPPORT;
1378 } else if (l >= field_length+1 &&
1379 memcmp(o->data.payload, field, field_length) == 0 &&
1380 o->data.payload[field_length] == '=') {
1384 if ((uint64_t) t != l)
1387 *data = o->data.payload;
1393 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1401 _public_ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
1403 uint64_t p, l, n, le_hash;
1415 f = j->current_file;
1417 return -EADDRNOTAVAIL;
1419 if (f->current_offset <= 0)
1420 return -EADDRNOTAVAIL;
1422 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1426 n = journal_file_entry_n_items(o);
1427 if (j->current_field >= n)
1430 p = le64toh(o->entry.items[j->current_field].object_offset);
1431 le_hash = o->entry.items[j->current_field].hash;
1432 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1436 if (le_hash != o->data.hash)
1439 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1442 /* We can't read objects larger than 4G on a 32bit machine */
1443 if ((uint64_t) t != l)
1446 if (o->object.flags & OBJECT_COMPRESSED) {
1450 if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize))
1453 *data = f->compress_buffer;
1454 *size = (size_t) rsize;
1456 return -EPROTONOSUPPORT;
1459 *data = o->data.payload;
1463 j->current_field ++;
1468 _public_ void sd_journal_restart_data(sd_journal *j) {
1472 j->current_field = 0;
1475 _public_ int sd_journal_get_fd(sd_journal *j) {
1479 return j->inotify_fd;
1482 static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
1489 /* Is this a subdirectory we watch? */
1490 p = hashmap_get(j->inotify_wd_dirs, INT_TO_PTR(e->wd));
1493 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1495 /* Event for a journal file */
1497 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1498 r = add_file(j, p, NULL, e->name);
1500 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1501 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1503 r = remove_file(j, p, NULL, e->name);
1505 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1508 } else if (e->len == 0) {
1510 /* Event for the directory itself */
1512 if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT))
1513 remove_directory_wd(j, e->wd);
1519 /* Must be the root directory then? */
1520 p = hashmap_get(j->inotify_wd_roots, INT_TO_PTR(e->wd));
1524 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1526 /* Event for a journal file */
1528 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1529 r = add_file(j, p, NULL, e->name);
1531 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1532 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1534 r = remove_file(j, p, NULL, e->name);
1536 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1539 } else if ((e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) {
1541 /* Event for subdirectory */
1543 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1545 r = add_directory(j, p, e->name);
1547 log_debug("Failed to add directory %s/%s: %s", p, e->name, strerror(-r));
1554 if (e->mask & IN_IGNORED)
1557 log_warning("Unknown inotify event.");
1560 _public_ int sd_journal_process(sd_journal *j) {
1561 uint8_t buffer[sizeof(struct inotify_event) + FILENAME_MAX];
1567 struct inotify_event *e;
1570 l = read(j->inotify_fd, buffer, sizeof(buffer));
1572 if (errno == EINTR || errno == EAGAIN)
1578 e = (struct inotify_event*) buffer;
1582 process_inotify_event(j, e);
1584 step = sizeof(struct inotify_event) + e->len;
1585 assert(step <= (size_t) l);
1587 e = (struct inotify_event*) ((uint8_t*) e + step);
1593 _public_ int sd_journal_query_unique(sd_journal *j, const char *field) {
1602 _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l) {
1613 _public_ void sd_journal_restart_unique(sd_journal *j) {