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);
532 if (direction == DIRECTION_DOWN) {
538 if (np == 0 || q < np) {
546 /* Check the last term */
547 if (term_match && !term_result)
550 /* Did this entry match against all matches? */
559 /* Did we find a subsequent entry? */
563 /* Hmm, ok, this entry only matched partially, so
564 * let's try another one */
570 static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) {
573 int compare_value, r;
578 if (f->current_offset > 0) {
579 cp = f->current_offset;
581 r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c);
585 r = next_with_matches(j, f, direction, &c, &cp);
591 r = find_location(j, f, direction, &c, &cp);
601 if (j->current_location.type == LOCATION_DISCRETE) {
604 k = compare_with_location(f, c, &j->current_location);
605 if (direction == DIRECTION_DOWN)
606 found = k >= compare_value;
608 found = k <= -compare_value;
620 r = next_with_matches(j, f, direction, &c, &cp);
626 static int real_journal_next(sd_journal *j, direction_t direction) {
627 JournalFile *f, *new_current = NULL;
630 uint64_t new_offset = 0;
631 Object *new_entry = NULL;
636 HASHMAP_FOREACH(f, j->files, i) {
641 r = next_beyond_location(j, f, direction, &o, &p);
652 k = compare_order(f, o, new_current, new_entry);
654 if (direction == DIRECTION_DOWN)
670 set_location(j, new_current, new_entry, new_offset);
675 _public_ int sd_journal_next(sd_journal *j) {
676 return real_journal_next(j, DIRECTION_DOWN);
679 _public_ int sd_journal_previous(sd_journal *j) {
680 return real_journal_next(j, DIRECTION_UP);
683 _public_ int sd_journal_next_skip(sd_journal *j, uint64_t skip) {
690 r = sd_journal_next(j);
704 _public_ int sd_journal_previous_skip(sd_journal *j, uint64_t skip) {
711 r = sd_journal_previous(j);
725 _public_ int sd_journal_get_cursor(sd_journal *j, char **cursor) {
728 char bid[33], sid[33];
735 if (!j->current_file || j->current_file->current_offset <= 0)
736 return -EADDRNOTAVAIL;
738 r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o);
742 sd_id128_to_string(j->current_file->header->seqnum_id, sid);
743 sd_id128_to_string(o->entry.boot_id, bid);
746 "s=%s;i=%llx;b=%s;m=%llx;t=%llx;x=%llx;p=%s",
747 sid, (unsigned long long) le64toh(o->entry.seqnum),
748 bid, (unsigned long long) le64toh(o->entry.monotonic),
749 (unsigned long long) le64toh(o->entry.realtime),
750 (unsigned long long) le64toh(o->entry.xor_hash),
751 file_name_from_path(j->current_file->path)) < 0)
757 _public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) {
761 unsigned long long seqnum, monotonic, realtime, xor_hash;
763 seqnum_id_set = false,
766 monotonic_set = false,
767 realtime_set = false,
768 xor_hash_set = false;
769 sd_id128_t seqnum_id, boot_id;
776 FOREACH_WORD_SEPARATOR(w, l, cursor, ";", state) {
780 if (l < 2 || w[1] != '=')
783 item = strndup(w, l);
790 seqnum_id_set = true;
791 k = sd_id128_from_string(w+2, &seqnum_id);
796 if (sscanf(w+2, "%llx", &seqnum) != 1)
802 k = sd_id128_from_string(w+2, &boot_id);
806 monotonic_set = true;
807 if (sscanf(w+2, "%llx", &monotonic) != 1)
813 if (sscanf(w+2, "%llx", &realtime) != 1)
819 if (sscanf(w+2, "%llx", &xor_hash) != 1)
830 if ((!seqnum_set || !seqnum_id_set) &&
831 (!monotonic_set || !boot_id_set) &&
837 j->current_location.type = LOCATION_DISCRETE;
840 j->current_location.realtime = (uint64_t) realtime;
841 j->current_location.realtime_set = true;
844 if (seqnum_set && seqnum_id_set) {
845 j->current_location.seqnum = (uint64_t) seqnum;
846 j->current_location.seqnum_id = seqnum_id;
847 j->current_location.seqnum_set = true;
850 if (monotonic_set && boot_id_set) {
851 j->current_location.monotonic = (uint64_t) monotonic;
852 j->current_location.boot_id = boot_id;
853 j->current_location.monotonic_set = true;
857 j->current_location.xor_hash = (uint64_t) xor_hash;
858 j->current_location.xor_hash_set = true;
864 _public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) {
869 j->current_location.type = LOCATION_DISCRETE;
870 j->current_location.boot_id = boot_id;
871 j->current_location.monotonic = usec;
872 j->current_location.monotonic_set = true;
877 _public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) {
882 j->current_location.type = LOCATION_DISCRETE;
883 j->current_location.realtime = usec;
884 j->current_location.realtime_set = true;
889 _public_ int sd_journal_seek_head(sd_journal *j) {
894 j->current_location.type = LOCATION_HEAD;
899 _public_ int sd_journal_seek_tail(sd_journal *j) {
904 j->current_location.type = LOCATION_TAIL;
909 static int add_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
918 if ((j->flags & SD_JOURNAL_SYSTEM_ONLY) &&
919 !startswith(filename, "system.journal"))
923 fn = join(prefix, "/", dir, "/", filename, NULL);
925 fn = join(prefix, "/", filename, NULL);
930 if (hashmap_get(j->files, fn)) {
935 if (hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
936 log_debug("Too many open journal files, not adding %s, ignoring.", fn);
941 r = journal_file_open(fn, O_RDONLY, 0, NULL, &f);
951 /* journal_file_dump(f); */
953 r = hashmap_put(j->files, f->path, f);
955 journal_file_close(f);
959 log_debug("File %s got added.", f->path);
964 static int remove_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) {
973 fn = join(prefix, "/", dir, "/", filename, NULL);
975 fn = join(prefix, "/", filename, NULL);
980 f = hashmap_get(j->files, fn);
986 hashmap_remove(j->files, f->path);
987 journal_file_close(f);
989 log_debug("File %s got removed.", f->path);
993 static int add_directory(sd_journal *j, const char *prefix, const char *dir) {
1004 if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
1005 (sd_id128_from_string(dir, &id) < 0 ||
1006 sd_id128_get_machine(&mid) < 0 ||
1007 !sd_id128_equal(id, mid)))
1010 fn = join(prefix, "/", dir, NULL);
1018 if (errno == ENOENT)
1024 wd = inotify_add_watch(j->inotify_fd, fn,
1025 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1026 IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|
1027 IN_DONT_FOLLOW|IN_ONLYDIR);
1029 if (hashmap_put(j->inotify_wd_dirs, INT_TO_PTR(wd), fn) < 0)
1030 inotify_rm_watch(j->inotify_fd, wd);
1038 struct dirent buf, *de;
1040 r = readdir_r(d, &buf, &de);
1044 if (!dirent_is_file_with_suffix(de, ".journal"))
1047 r = add_file(j, prefix, dir, de->d_name);
1049 log_debug("Failed to add file %s/%s/%s: %s", prefix, dir, de->d_name, strerror(-r));
1054 log_debug("Directory %s/%s got added.", prefix, dir);
1059 static void remove_directory_wd(sd_journal *j, int wd) {
1065 if (j->inotify_fd >= 0)
1066 inotify_rm_watch(j->inotify_fd, wd);
1068 p = hashmap_remove(j->inotify_wd_dirs, INT_TO_PTR(wd));
1071 log_debug("Directory %s got removed.", p);
1076 static void add_root_wd(sd_journal *j, const char *p) {
1083 wd = inotify_add_watch(j->inotify_fd, p,
1084 IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
1085 IN_DONT_FOLLOW|IN_ONLYDIR);
1090 if (!k || hashmap_put(j->inotify_wd_roots, INT_TO_PTR(wd), k) < 0) {
1091 inotify_rm_watch(j->inotify_fd, wd);
1096 static void remove_root_wd(sd_journal *j, int wd) {
1102 if (j->inotify_fd >= 0)
1103 inotify_rm_watch(j->inotify_fd, wd);
1105 p = hashmap_remove(j->inotify_wd_roots, INT_TO_PTR(wd));
1108 log_debug("Root %s got removed.", p);
1113 _public_ int sd_journal_open(sd_journal **ret, int flags) {
1116 const char search_paths[] =
1117 "/run/log/journal\0"
1118 "/var/log/journal\0";
1124 if (flags & ~(SD_JOURNAL_LOCAL_ONLY|
1125 SD_JOURNAL_RUNTIME_ONLY|
1126 SD_JOURNAL_SYSTEM_ONLY))
1129 j = new0(sd_journal, 1);
1135 j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
1136 if (j->inotify_fd < 0) {
1141 j->files = hashmap_new(string_hash_func, string_compare_func);
1147 j->inotify_wd_dirs = hashmap_new(trivial_hash_func, trivial_compare_func);
1148 j->inotify_wd_roots = hashmap_new(trivial_hash_func, trivial_compare_func);
1150 if (!j->inotify_wd_dirs || !j->inotify_wd_roots) {
1155 /* We ignore most errors here, since the idea is to only open
1156 * what's actually accessible, and ignore the rest. */
1158 NULSTR_FOREACH(p, search_paths) {
1161 if ((flags & SD_JOURNAL_RUNTIME_ONLY) &&
1162 !path_startswith(p, "/run"))
1167 if (errno != ENOENT)
1168 log_debug("Failed to open %s: %m", p);
1175 struct dirent buf, *de;
1178 r = readdir_r(d, &buf, &de);
1182 if (dirent_is_file_with_suffix(de, ".journal")) {
1183 r = add_file(j, p, NULL, de->d_name);
1185 log_debug("Failed to add file %s/%s: %s", p, de->d_name, strerror(-r));
1187 } else if ((de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) &&
1188 sd_id128_from_string(de->d_name, &id) >= 0) {
1190 r = add_directory(j, p, de->d_name);
1192 log_debug("Failed to add directory %s/%s: %s", p, de->d_name, strerror(-r));
1203 sd_journal_close(j);
1208 _public_ void sd_journal_close(sd_journal *j) {
1212 if (j->inotify_wd_dirs) {
1215 while ((k = hashmap_first_key(j->inotify_wd_dirs)))
1216 remove_directory_wd(j, PTR_TO_INT(k));
1218 hashmap_free(j->inotify_wd_dirs);
1221 if (j->inotify_wd_roots) {
1224 while ((k = hashmap_first_key(j->inotify_wd_roots)))
1225 remove_root_wd(j, PTR_TO_INT(k));
1227 hashmap_free(j->inotify_wd_roots);
1233 while ((f = hashmap_steal_first(j->files)))
1234 journal_file_close(f);
1236 hashmap_free(j->files);
1239 sd_journal_flush_matches(j);
1241 if (j->inotify_fd >= 0)
1242 close_nointr_nofail(j->inotify_fd);
1247 _public_ int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) {
1257 f = j->current_file;
1259 return -EADDRNOTAVAIL;
1261 if (f->current_offset <= 0)
1262 return -EADDRNOTAVAIL;
1264 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1268 *ret = le64toh(o->entry.realtime);
1272 _public_ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) {
1283 f = j->current_file;
1285 return -EADDRNOTAVAIL;
1287 if (f->current_offset <= 0)
1288 return -EADDRNOTAVAIL;
1290 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1295 *ret_boot_id = o->entry.boot_id;
1297 r = sd_id128_get_boot(&id);
1301 if (!sd_id128_equal(id, o->entry.boot_id))
1305 *ret = le64toh(o->entry.monotonic);
1309 _public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) {
1312 size_t field_length;
1325 if (isempty(field) || strchr(field, '='))
1328 f = j->current_file;
1330 return -EADDRNOTAVAIL;
1332 if (f->current_offset <= 0)
1333 return -EADDRNOTAVAIL;
1335 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1339 field_length = strlen(field);
1341 n = journal_file_entry_n_items(o);
1342 for (i = 0; i < n; i++) {
1343 uint64_t p, l, le_hash;
1346 p = le64toh(o->entry.items[i].object_offset);
1347 le_hash = o->entry.items[i].hash;
1348 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1352 if (le_hash != o->data.hash)
1355 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1357 if (o->object.flags & OBJECT_COMPRESSED) {
1360 if (uncompress_startswith(o->data.payload, l,
1361 &f->compress_buffer, &f->compress_buffer_size,
1362 field, field_length, '=')) {
1366 if (!uncompress_blob(o->data.payload, l,
1367 &f->compress_buffer, &f->compress_buffer_size, &rsize))
1370 *data = f->compress_buffer;
1371 *size = (size_t) rsize;
1376 return -EPROTONOSUPPORT;
1379 } else if (l >= field_length+1 &&
1380 memcmp(o->data.payload, field, field_length) == 0 &&
1381 o->data.payload[field_length] == '=') {
1385 if ((uint64_t) t != l)
1388 *data = o->data.payload;
1394 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1402 _public_ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
1404 uint64_t p, l, n, le_hash;
1416 f = j->current_file;
1418 return -EADDRNOTAVAIL;
1420 if (f->current_offset <= 0)
1421 return -EADDRNOTAVAIL;
1423 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1427 n = journal_file_entry_n_items(o);
1428 if (j->current_field >= n)
1431 p = le64toh(o->entry.items[j->current_field].object_offset);
1432 le_hash = o->entry.items[j->current_field].hash;
1433 r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
1437 if (le_hash != o->data.hash)
1440 l = le64toh(o->object.size) - offsetof(Object, data.payload);
1443 /* We can't read objects larger than 4G on a 32bit machine */
1444 if ((uint64_t) t != l)
1447 if (o->object.flags & OBJECT_COMPRESSED) {
1451 if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize))
1454 *data = f->compress_buffer;
1455 *size = (size_t) rsize;
1457 return -EPROTONOSUPPORT;
1460 *data = o->data.payload;
1464 j->current_field ++;
1469 _public_ void sd_journal_restart_data(sd_journal *j) {
1473 j->current_field = 0;
1476 _public_ int sd_journal_get_fd(sd_journal *j) {
1480 return j->inotify_fd;
1483 static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
1490 /* Is this a subdirectory we watch? */
1491 p = hashmap_get(j->inotify_wd_dirs, INT_TO_PTR(e->wd));
1494 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1496 /* Event for a journal file */
1498 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1499 r = add_file(j, p, NULL, e->name);
1501 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1502 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1504 r = remove_file(j, p, NULL, e->name);
1506 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1509 } else if (e->len == 0) {
1511 /* Event for the directory itself */
1513 if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT))
1514 remove_directory_wd(j, e->wd);
1520 /* Must be the root directory then? */
1521 p = hashmap_get(j->inotify_wd_roots, INT_TO_PTR(e->wd));
1525 if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) {
1527 /* Event for a journal file */
1529 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1530 r = add_file(j, p, NULL, e->name);
1532 log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r));
1533 } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) {
1535 r = remove_file(j, p, NULL, e->name);
1537 log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r));
1540 } else if ((e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) {
1542 /* Event for subdirectory */
1544 if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
1546 r = add_directory(j, p, e->name);
1548 log_debug("Failed to add directory %s/%s: %s", p, e->name, strerror(-r));
1555 if (e->mask & IN_IGNORED)
1558 log_warning("Unknown inotify event.");
1561 _public_ int sd_journal_process(sd_journal *j) {
1562 uint8_t buffer[sizeof(struct inotify_event) + FILENAME_MAX];
1568 struct inotify_event *e;
1571 l = read(j->inotify_fd, buffer, sizeof(buffer));
1573 if (errno == EINTR || errno == EAGAIN)
1579 e = (struct inotify_event*) buffer;
1583 process_inotify_event(j, e);
1585 step = sizeof(struct inotify_event) + e->len;
1586 assert(step <= (size_t) l);
1588 e = (struct inotify_event*) ((uint8_t*) e + step);
1594 _public_ int sd_journal_query_unique(sd_journal *j, const char *field) {
1603 _public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l) {
1614 _public_ void sd_journal_restart_unique(sd_journal *j) {