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);
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);
382 } else if (same_field(term_match->data, term_match->size, m->data, m->size)) {
384 /* Same field as previous match... */
387 /* Find the earliest of the OR matches */
390 (direction == DIRECTION_DOWN && cp < tp) ||
391 (direction == DIRECTION_UP && cp > tp)) {
400 /* Previous term is finished, did anything match? */
404 /* Find the last of the AND matches */
406 (direction == DIRECTION_DOWN && tp > p) ||
407 (direction == DIRECTION_UP && tp < p)) {
424 /* Last term is finished, did anything match? */
429 (direction == DIRECTION_DOWN && tp > p) ||
430 (direction == DIRECTION_UP && tp < p)) {
448 static int next_with_matches(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
462 /* No matches is easy */
464 r = journal_file_next_entry(f, c, cp, direction, &c, &cp);
475 /* So there are matches we have to adhere to, let's find the
476 * first entry that matches all of them */
480 bool found, term_result = false;
481 Match *m, *term_match = NULL;
484 n = journal_file_entry_n_items(c);
486 /* Make sure we don't match the entry we are starting
488 found = cp > *offset;
491 LIST_FOREACH(matches, m, j->matches) {
495 /* Let's check if this is the beginning of a
496 * new term, i.e. has a different field prefix
497 * as the preceeding match. */
501 } else if (!same_field(term_match->data, term_match->size, m->data, m->size)) {
509 for (k = 0; k < n; k++)
510 if (c->entry.items[k].hash == m->le_hash)
514 /* Hmm, didn't find any field that
515 * matched this rule, so ignore this
516 * match. Go on with next match */
522 /* Hmm, so, this field matched, let's remember
523 * where we'd have to try next, in case the other
524 * matches are not OK */
526 r = journal_file_next_entry_for_data(f, c, cp, le64toh(c->entry.items[k].object_offset), direction, &qo, &q);
529 if (direction == DIRECTION_DOWN) {
535 if (np == 0 || q < np) {
543 /* Check the last term */
544 if (term_match && !term_result)
547 /* Did this entry match against all matches? */
556 /* Did we find a subsequent entry? */
560 /* Hmm, ok, this entry only matched partially, so
561 * let's try another one */
567 static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
570 int compare_value, r;
575 if (f->current_offset > 0) {
576 cp = f->current_offset;
578 r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c);
582 r = next_with_matches(j, f, direction, &c, &cp);
588 r = find_location(j, f, direction, &c, &cp);
598 if (j->current_location.type == LOCATION_DISCRETE) {
601 k = compare_with_location(f, c, &j->current_location);
602 if (direction == DIRECTION_DOWN)
603 found = k >= compare_value;
605 found = k <= -compare_value;
617 r = next_with_matches(j, f, direction, &c, &cp);
623 static int real_journal_next(sd_journal *j, direction_t direction) {
624 JournalFile *f, *new_current = NULL;
627 uint64_t new_offset = 0;
628 Object *new_entry = NULL;
633 HASHMAP_FOREACH(f, j->files, i) {
638 r = next_beyond_location(j, f, direction, &o, &p);
649 k = compare_order(f, o, new_current, new_entry);
651 if (direction == DIRECTION_DOWN)
667 set_location(j, new_current, new_entry, new_offset);
672 _public_ int sd_journal_next(sd_journal *j) {
673 return real_journal_next(j, DIRECTION_DOWN);
676 _public_ int sd_journal_previous(sd_journal *j) {
677 return real_journal_next(j, DIRECTION_UP);
680 _public_ int sd_journal_next_skip(sd_journal *j, uint64_t skip) {
687 r = sd_journal_next(j);
701 _public_ int sd_journal_previous_skip(sd_journal *j, uint64_t skip) {
708 r = sd_journal_previous(j);
722 _public_ int sd_journal_get_cursor(sd_journal *j, char **cursor) {
725 char bid[33], sid[33];
732 if (!j->current_file || j->current_file->current_offset <= 0)
733 return -EADDRNOTAVAIL;
735 r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o);
739 sd_id128_to_string(j->current_file->header->seqnum_id, sid);
740 sd_id128_to_string(o->entry.boot_id, bid);
743 "s=%s;i=%llx;b=%s;m=%llx;t=%llx;x=%llx;p=%s",
744 sid, (unsigned long long) le64toh(o->entry.seqnum),
745 bid, (unsigned long long) le64toh(o->entry.monotonic),
746 (unsigned long long) le64toh(o->entry.realtime),
747 (unsigned long long) le64toh(o->entry.xor_hash),
748 file_name_from_path(j->current_file->path)) < 0)
754 _public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) {
758 unsigned long long seqnum, monotonic, realtime, xor_hash;
760 seqnum_id_set = false,
763 monotonic_set = false,
764 realtime_set = false,
765 xor_hash_set = false;
766 sd_id128_t seqnum_id, boot_id;
773 FOREACH_WORD_SEPARATOR(w, l, cursor, ";", state) {
777 if (l < 2 || w[1] != '=')
780 item = strndup(w, l);
787 seqnum_id_set = true;
788 k = sd_id128_from_string(w+2, &seqnum_id);
793 if (sscanf(w+2, "%llx", &seqnum) != 1)
799 k = sd_id128_from_string(w+2, &boot_id);
803 monotonic_set = true;
804 if (sscanf(w+2, "%llx", &monotonic) != 1)
810 if (sscanf(w+2, "%llx", &realtime) != 1)
816 if (sscanf(w+2, "%llx", &xor_hash) != 1)
827 if ((!seqnum_set || !seqnum_id_set) &&
828 (!monotonic_set || !boot_id_set) &&
834 j->current_location.type = LOCATION_DISCRETE;
837 j->current_location.realtime = (uint64_t) realtime;
838 j->current_location.realtime_set = true;
841 if (seqnum_set && seqnum_id_set) {
842 j->current_location.seqnum = (uint64_t) seqnum;
843 j->current_location.seqnum_id = seqnum_id;
844 j->current_location.seqnum_set = true;
847 if (monotonic_set && boot_id_set) {
848 j->current_location.monotonic = (uint64_t) monotonic;
849 j->current_location.boot_id = boot_id;
850 j->current_location.monotonic_set = true;
854 j->current_location.xor_hash = (uint64_t) xor_hash;
855 j->current_location.xor_hash_set = true;
861 _public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) {
866 j->current_location.type = LOCATION_DISCRETE;
867 j->current_location.boot_id = boot_id;
868 j->current_location.monotonic = usec;
869 j->current_location.monotonic_set = true;
874 _public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) {
879 j->current_location.type = LOCATION_DISCRETE;
880 j->current_location.realtime = usec;
881 j->current_location.realtime_set = true;
886 _public_ int sd_journal_seek_head(sd_journal *j) {
891 j->current_location.type = LOCATION_HEAD;
896 _public_ int sd_journal_seek_tail(sd_journal *j) {
901 j->current_location.type = LOCATION_TAIL;
906 static int add_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
915 if ((j->flags & SD_JOURNAL_SYSTEM_ONLY) &&
916 !startswith(filename, "system.journal"))
920 fn = join(prefix, "/", dir, "/", filename, NULL);
922 fn = join(prefix, "/", filename, NULL);
927 if (hashmap_get(j->files, fn)) {
932 if (hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
933 log_debug("Too many open journal files, not adding %s, ignoring.", fn);
938 r = journal_file_open(fn, O_RDONLY, 0, NULL, &f);
948 /* journal_file_dump(f); */
950 r = hashmap_put(j->files, f->path, f);
952 journal_file_close(f);
956 log_debug("File %s got added.", f->path);
961 static int remove_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
970 fn = join(prefix, "/", dir, "/", filename, NULL);
972 fn = join(prefix, "/", filename, NULL);
977 f = hashmap_get(j->files, fn);
983 hashmap_remove(j->files, f->path);
984 journal_file_close(f);
986 log_debug("File %s got removed.", f->path);
990 static int add_directory(sd_journal *j, const char *prefix, const char *dir) {
1001 if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
1002 (sd_id128_from_string(dir, &id) < 0 ||
1003 sd_id128_get_machine(&mid) < 0 ||
1004 !sd_id128_equal(id, mid)))
1007 fn = join(prefix, "/", dir, NULL);
1015 if (errno == ENOENT)
1021 wd = inotify_add_watch(j->inotify_fd, fn,
1022 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1023 IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|
1024 IN_DONT_FOLLOW|IN_ONLYDIR);
1026 if (hashmap_put(j->inotify_wd_dirs, INT_TO_PTR(wd), fn) < 0)
1027 inotify_rm_watch(j->inotify_fd, wd);
1035 struct dirent buf, *de;
1037 r = readdir_r(d, &buf, &de);
1041 if (!dirent_is_file_with_suffix(de, ".journal"))
1044 r = add_file(j, prefix, dir, de->d_name);
1046 log_debug("Failed to add file %s/%s/%s: %s", prefix, dir, de->d_name, strerror(-r));
1051 log_debug("Directory %s/%s got added.", prefix, dir);
1056 static void remove_directory_wd(sd_journal *j, int wd) {
1062 if (j->inotify_fd >= 0)
1063 inotify_rm_watch(j->inotify_fd, wd);
1065 p = hashmap_remove(j->inotify_wd_dirs, INT_TO_PTR(wd));
1068 log_debug("Directory %s got removed.", p);
1073 static void add_root_wd(sd_journal *j, const char *p) {
1080 wd = inotify_add_watch(j->inotify_fd, p,
1081 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1082 IN_DONT_FOLLOW|IN_ONLYDIR);
1087 if (!k || hashmap_put(j->inotify_wd_roots, INT_TO_PTR(wd), k) < 0) {
1088 inotify_rm_watch(j->inotify_fd, wd);
1093 static void remove_root_wd(sd_journal *j, int wd) {
1099 if (j->inotify_fd >= 0)
1100 inotify_rm_watch(j->inotify_fd, wd);
1102 p = hashmap_remove(j->inotify_wd_roots, INT_TO_PTR(wd));
1105 log_debug("Root %s got removed.", p);
1110 _public_ int sd_journal_open(sd_journal **ret, int flags) {
1113 const char search_paths[] =
1114 "/run/log/journal\0"
1115 "/var/log/journal\0";
1121 if (flags & ~(SD_JOURNAL_LOCAL_ONLY|
1122 SD_JOURNAL_RUNTIME_ONLY|
1123 SD_JOURNAL_SYSTEM_ONLY))
1126 j = new0(sd_journal, 1);
1132 j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
1133 if (j->inotify_fd < 0) {
1138 j->files = hashmap_new(string_hash_func, string_compare_func);
1144 j->inotify_wd_dirs = hashmap_new(trivial_hash_func, trivial_compare_func);
1145 j->inotify_wd_roots = hashmap_new(trivial_hash_func, trivial_compare_func);
1147 if (!j->inotify_wd_dirs || !j->inotify_wd_roots) {
1152 /* We ignore most errors here, since the idea is to only open
1153 * what's actually accessible, and ignore the rest. */
1155 NULSTR_FOREACH(p, search_paths) {
1158 if ((flags & SD_JOURNAL_RUNTIME_ONLY) &&
1159 !path_startswith(p, "/run"))
1164 if (errno != ENOENT)
1165 log_debug("Failed to open %s: %m", p);
1172 struct dirent buf, *de;
1175 r = readdir_r(d, &buf, &de);
1179 if (dirent_is_file_with_suffix(de, ".journal")) {
1180 r = add_file(j, p, NULL, de->d_name);
1182 log_debug("Failed to add file %s/%s: %s", p, de->d_name, strerror(-r));
1184 } else if ((de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) &&
1185 sd_id128_from_string(de->d_name, &id) >= 0) {
1187 r = add_directory(j, p, de->d_name);
1189 log_debug("Failed to add directory %s/%s: %s", p, de->d_name, strerror(-r));
1200 sd_journal_close(j);
1205 _public_ void sd_journal_close(sd_journal *j) {
1209 if (j->inotify_wd_dirs) {
1212 while ((k = hashmap_first_key(j->inotify_wd_dirs)))
1213 remove_directory_wd(j, PTR_TO_INT(k));
1215 hashmap_free(j->inotify_wd_dirs);
1218 if (j->inotify_wd_roots) {
1221 while ((k = hashmap_first_key(j->inotify_wd_roots)))
1222 remove_root_wd(j, PTR_TO_INT(k));
1224 hashmap_free(j->inotify_wd_roots);
1230 while ((f = hashmap_steal_first(j->files)))
1231 journal_file_close(f);
1233 hashmap_free(j->files);
1236 sd_journal_flush_matches(j);
1238 if (j->inotify_fd >= 0)
1239 close_nointr_nofail(j->inotify_fd);
1244 _public_ int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) {
1254 f = j->current_file;
1256 return -EADDRNOTAVAIL;
1258 if (f->current_offset <= 0)
1259 return -EADDRNOTAVAIL;
1261 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1265 *ret = le64toh(o->entry.realtime);
1269 _public_ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) {
1280 f = j->current_file;
1282 return -EADDRNOTAVAIL;
1284 if (f->current_offset <= 0)
1285 return -EADDRNOTAVAIL;
1287 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1292 *ret_boot_id = o->entry.boot_id;
1294 r = sd_id128_get_boot(&id);
1298 if (!sd_id128_equal(id, o->entry.boot_id))
1302 *ret = le64toh(o->entry.monotonic);
1306 _public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) {
1309 size_t field_length;
1322 if (isempty(field) || strchr(field, '='))
1325 f = j->current_file;
1327 return -EADDRNOTAVAIL;
1329 if (f->current_offset <= 0)
1330 return -EADDRNOTAVAIL;
1332 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1336 field_length = strlen(field);
1338 n = journal_file_entry_n_items(o);
1339 for (i = 0; i < n; i++) {
1340 uint64_t p, l, le_hash;
1343 p = le64toh(o->entry.items[i].object_offset);
1344 le_hash = o->entry.items[i].hash;
1345 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1349 if (le_hash != o->data.hash)
1352 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1354 if (o->object.flags & OBJECT_COMPRESSED) {
1357 if (uncompress_startswith(o->data.payload, l,
1358 &f->compress_buffer, &f->compress_buffer_size,
1359 field, field_length, '=')) {
1363 if (!uncompress_blob(o->data.payload, l,
1364 &f->compress_buffer, &f->compress_buffer_size, &rsize))
1367 *data = f->compress_buffer;
1368 *size = (size_t) rsize;
1373 return -EPROTONOSUPPORT;
1376 } else if (l >= field_length+1 &&
1377 memcmp(o->data.payload, field, field_length) == 0 &&
1378 o->data.payload[field_length] == '=') {
1382 if ((uint64_t) t != l)
1385 *data = o->data.payload;
1391 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1399 _public_ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
1401 uint64_t p, l, n, le_hash;
1413 f = j->current_file;
1415 return -EADDRNOTAVAIL;
1417 if (f->current_offset <= 0)
1418 return -EADDRNOTAVAIL;
1420 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1424 n = journal_file_entry_n_items(o);
1425 if (j->current_field >= n)
1428 p = le64toh(o->entry.items[j->current_field].object_offset);
1429 le_hash = o->entry.items[j->current_field].hash;
1430 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1434 if (le_hash != o->data.hash)
1437 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1440 /* We can't read objects larger than 4G on a 32bit machine */
1441 if ((uint64_t) t != l)
1444 if (o->object.flags & OBJECT_COMPRESSED) {
1448 if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize))
1451 *data = f->compress_buffer;
1452 *size = (size_t) rsize;
1454 return -EPROTONOSUPPORT;
1457 *data = o->data.payload;
1461 j->current_field ++;
1466 _public_ void sd_journal_restart_data(sd_journal *j) {
1470 j->current_field = 0;
1473 _public_ int sd_journal_get_fd(sd_journal *j) {
1477 return j->inotify_fd;
1480 static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
1487 /* Is this a subdirectory we watch? */
1488 p = hashmap_get(j->inotify_wd_dirs, INT_TO_PTR(e->wd));
1491 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1493 /* Event for a journal file */
1495 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1496 r = add_file(j, p, NULL, e->name);
1498 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1499 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1501 r = remove_file(j, p, NULL, e->name);
1503 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1506 } else if (e->len == 0) {
1508 /* Event for the directory itself */
1510 if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT))
1511 remove_directory_wd(j, e->wd);
1517 /* Must be the root directory then? */
1518 p = hashmap_get(j->inotify_wd_roots, INT_TO_PTR(e->wd));
1522 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1524 /* Event for a journal file */
1526 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1527 r = add_file(j, p, NULL, e->name);
1529 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1530 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1532 r = remove_file(j, p, NULL, e->name);
1534 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1537 } else if ((e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) {
1539 /* Event for subdirectory */
1541 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1543 r = add_directory(j, p, e->name);
1545 log_debug("Failed to add directory %s/%s: %s", p, e->name, strerror(-r));
1552 if (e->mask & IN_IGNORED)
1555 log_warning("Unknown inotify event.");
1558 _public_ int sd_journal_process(sd_journal *j) {
1559 uint8_t buffer[sizeof(struct inotify_event) + FILENAME_MAX];
1565 struct inotify_event *e;
1568 l = read(j->inotify_fd, buffer, sizeof(buffer));
1570 if (errno == EINTR || errno == EAGAIN)
1576 e = (struct inotify_event*) buffer;
1580 process_inotify_event(j, e);
1582 step = sizeof(struct inotify_event) + e->len;
1583 assert(step <= (size_t) l);
1585 e = (struct inotify_event*) ((uint8_t*) e + step);
1591 _public_ int sd_journal_query_unique(sd_journal *j, const char *field) {
1600 _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l) {
1611 _public_ void sd_journal_restart_unique(sd_journal *j) {