-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2011 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <unistd.h>
-#include <sys/inotify.h>
-#include <poll.h>
-#include <sys/vfs.h>
-#include <linux/magic.h>
-
-#include "sd-journal.h"
-#include "journal-def.h"
-#include "journal-file.h"
-#include "hashmap.h"
-#include "list.h"
-#include "strv.h"
-#include "path-util.h"
-#include "lookup3.h"
-#include "compress.h"
-#include "journal-internal.h"
-#include "missing.h"
-#include "catalog.h"
-#include "replace-var.h"
-#include "fileio.h"
-
-#define JOURNAL_FILES_MAX 7168
-
-#define JOURNAL_FILES_RECHECK_USEC (2 * USEC_PER_SEC)
-
-#define REPLACE_VAR_MAX 256
-
-#define DEFAULT_DATA_THRESHOLD (64*1024)
-
-static void remove_file_real(sd_journal *j, JournalFile *f);
-
-static bool journal_pid_changed(sd_journal *j) {
- assert(j);
-
- /* We don't support people creating a journal object and
- * keeping it around over a fork(). Let's complain. */
-
- return j->original_pid != getpid();
-}
-
-/* We return an error here only if we didn't manage to
- memorize the real error. */
-static int set_put_error(sd_journal *j, int r) {
- int k;
-
- if (r >= 0)
- return r;
-
- k = set_ensure_allocated(&j->errors, NULL);
- if (k < 0)
- return k;
-
- return set_put(j->errors, INT_TO_PTR(r));
-}
-
-static void detach_location(sd_journal *j) {
- Iterator i;
- JournalFile *f;
-
- assert(j);
-
- j->current_file = NULL;
- j->current_field = 0;
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i)
- journal_file_reset_location(f);
-}
-
-static void reset_location(sd_journal *j) {
- assert(j);
-
- detach_location(j);
- zero(j->current_location);
-}
-
-static void init_location(Location *l, LocationType type, JournalFile *f, Object *o) {
- assert(l);
- assert(type == LOCATION_DISCRETE || type == LOCATION_SEEK);
- assert(f);
- assert(o->object.type == OBJECT_ENTRY);
-
- l->type = type;
- l->seqnum = le64toh(o->entry.seqnum);
- l->seqnum_id = f->header->seqnum_id;
- l->realtime = le64toh(o->entry.realtime);
- l->monotonic = le64toh(o->entry.monotonic);
- l->boot_id = o->entry.boot_id;
- l->xor_hash = le64toh(o->entry.xor_hash);
-
- l->seqnum_set = l->realtime_set = l->monotonic_set = l->xor_hash_set = true;
-}
-
-static void set_location(sd_journal *j, JournalFile *f, Object *o) {
- assert(j);
- assert(f);
- assert(o);
-
- init_location(&j->current_location, LOCATION_DISCRETE, f, o);
-
- j->current_file = f;
- j->current_field = 0;
-
- /* Let f know its candidate entry was picked. */
- assert(f->location_type == LOCATION_SEEK);
- f->location_type = LOCATION_DISCRETE;
-}
-
-static int match_is_valid(const void *data, size_t size) {
- const char *b, *p;
-
- assert(data);
-
- if (size < 2)
- return false;
-
- if (startswith(data, "__"))
- return false;
-
- b = data;
- for (p = b; p < b + size; p++) {
-
- if (*p == '=')
- return p > b;
-
- if (*p == '_')
- continue;
-
- if (*p >= 'A' && *p <= 'Z')
- continue;
-
- if (*p >= '0' && *p <= '9')
- continue;
-
- return false;
- }
-
- return false;
-}
-
-static bool same_field(const void *_a, size_t s, const void *_b, size_t t) {
- const uint8_t *a = _a, *b = _b;
- size_t j;
-
- for (j = 0; j < s && j < t; j++) {
-
- if (a[j] != b[j])
- return false;
-
- if (a[j] == '=')
- return true;
- }
-
- assert_not_reached("\"=\" not found");
-}
-
-static Match *match_new(Match *p, MatchType t) {
- Match *m;
-
- m = new0(Match, 1);
- if (!m)
- return NULL;
-
- m->type = t;
-
- if (p) {
- m->parent = p;
- LIST_PREPEND(matches, p->matches, m);
- }
-
- return m;
-}
-
-static void match_free(Match *m) {
- assert(m);
-
- while (m->matches)
- match_free(m->matches);
-
- if (m->parent)
- LIST_REMOVE(matches, m->parent->matches, m);
-
- free(m->data);
- free(m);
-}
-
-static void match_free_if_empty(Match *m) {
- if (!m || m->matches)
- return;
-
- match_free(m);
-}
-
-_public_ int sd_journal_add_match(sd_journal *j, const void *data, size_t size) {
- Match *l3, *l4, *add_here = NULL, *m;
- le64_t le_hash;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(data, -EINVAL);
-
- if (size == 0)
- size = strlen(data);
-
- assert_return(match_is_valid(data, size), -EINVAL);
-
- /* level 0: AND term
- * level 1: OR terms
- * level 2: AND terms
- * level 3: OR terms
- * level 4: concrete matches */
-
- if (!j->level0) {
- j->level0 = match_new(NULL, MATCH_AND_TERM);
- if (!j->level0)
- return -ENOMEM;
- }
-
- if (!j->level1) {
- j->level1 = match_new(j->level0, MATCH_OR_TERM);
- if (!j->level1)
- return -ENOMEM;
- }
-
- if (!j->level2) {
- j->level2 = match_new(j->level1, MATCH_AND_TERM);
- if (!j->level2)
- return -ENOMEM;
- }
-
- assert(j->level0->type == MATCH_AND_TERM);
- assert(j->level1->type == MATCH_OR_TERM);
- assert(j->level2->type == MATCH_AND_TERM);
-
- le_hash = htole64(hash64(data, size));
-
- LIST_FOREACH(matches, l3, j->level2->matches) {
- assert(l3->type == MATCH_OR_TERM);
-
- LIST_FOREACH(matches, l4, l3->matches) {
- assert(l4->type == MATCH_DISCRETE);
-
- /* Exactly the same match already? Then ignore
- * this addition */
- if (l4->le_hash == le_hash &&
- l4->size == size &&
- memcmp(l4->data, data, size) == 0)
- return 0;
-
- /* Same field? Then let's add this to this OR term */
- if (same_field(data, size, l4->data, l4->size)) {
- add_here = l3;
- break;
- }
- }
-
- if (add_here)
- break;
- }
-
- if (!add_here) {
- add_here = match_new(j->level2, MATCH_OR_TERM);
- if (!add_here)
- goto fail;
- }
-
- m = match_new(add_here, MATCH_DISCRETE);
- if (!m)
- goto fail;
-
- m->le_hash = le_hash;
- m->size = size;
- m->data = memdup(data, size);
- if (!m->data)
- goto fail;
-
- detach_location(j);
-
- return 0;
-
-fail:
- match_free_if_empty(add_here);
- match_free_if_empty(j->level2);
- match_free_if_empty(j->level1);
- match_free_if_empty(j->level0);
-
- return -ENOMEM;
-}
-
-_public_ int sd_journal_add_conjunction(sd_journal *j) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- if (!j->level0)
- return 0;
-
- if (!j->level1)
- return 0;
-
- if (!j->level1->matches)
- return 0;
-
- j->level1 = NULL;
- j->level2 = NULL;
-
- return 0;
-}
-
-_public_ int sd_journal_add_disjunction(sd_journal *j) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- if (!j->level0)
- return 0;
-
- if (!j->level1)
- return 0;
-
- if (!j->level2)
- return 0;
-
- if (!j->level2->matches)
- return 0;
-
- j->level2 = NULL;
- return 0;
-}
-
-static char *match_make_string(Match *m) {
- char *p, *r;
- Match *i;
- bool enclose = false;
-
- if (!m)
- return strdup("none");
-
- if (m->type == MATCH_DISCRETE)
- return strndup(m->data, m->size);
-
- p = NULL;
- LIST_FOREACH(matches, i, m->matches) {
- char *t, *k;
-
- t = match_make_string(i);
- if (!t) {
- free(p);
- return NULL;
- }
-
- if (p) {
- k = strjoin(p, m->type == MATCH_OR_TERM ? " OR " : " AND ", t, NULL);
- free(p);
- free(t);
-
- if (!k)
- return NULL;
-
- p = k;
-
- enclose = true;
- } else
- p = t;
- }
-
- if (enclose) {
- r = strjoin("(", p, ")", NULL);
- free(p);
- return r;
- }
-
- return p;
-}
-
-char *journal_make_match_string(sd_journal *j) {
- assert(j);
-
- return match_make_string(j->level0);
-}
-
-_public_ void sd_journal_flush_matches(sd_journal *j) {
- if (!j)
- return;
-
- if (j->level0)
- match_free(j->level0);
-
- j->level0 = j->level1 = j->level2 = NULL;
-
- detach_location(j);
-}
-
-_pure_ static int compare_with_location(JournalFile *f, Location *l) {
- assert(f);
- assert(l);
- assert(f->location_type == LOCATION_SEEK);
- assert(l->type == LOCATION_DISCRETE || l->type == LOCATION_SEEK);
-
- if (l->monotonic_set &&
- sd_id128_equal(f->current_boot_id, l->boot_id) &&
- l->realtime_set &&
- f->current_realtime == l->realtime &&
- l->xor_hash_set &&
- f->current_xor_hash == l->xor_hash)
- return 0;
-
- if (l->seqnum_set &&
- sd_id128_equal(f->header->seqnum_id, l->seqnum_id)) {
-
- if (f->current_seqnum < l->seqnum)
- return -1;
- if (f->current_seqnum > l->seqnum)
- return 1;
- }
-
- if (l->monotonic_set &&
- sd_id128_equal(f->current_boot_id, l->boot_id)) {
-
- if (f->current_monotonic < l->monotonic)
- return -1;
- if (f->current_monotonic > l->monotonic)
- return 1;
- }
-
- if (l->realtime_set) {
-
- if (f->current_realtime < l->realtime)
- return -1;
- if (f->current_realtime > l->realtime)
- return 1;
- }
-
- if (l->xor_hash_set) {
-
- if (f->current_xor_hash < l->xor_hash)
- return -1;
- if (f->current_xor_hash > l->xor_hash)
- return 1;
- }
-
- return 0;
-}
-
-static int next_for_match(
- sd_journal *j,
- Match *m,
- JournalFile *f,
- uint64_t after_offset,
- direction_t direction,
- Object **ret,
- uint64_t *offset) {
-
- int r;
- uint64_t np = 0;
- Object *n;
-
- assert(j);
- assert(m);
- assert(f);
-
- if (m->type == MATCH_DISCRETE) {
- uint64_t dp;
-
- r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp);
- if (r <= 0)
- return r;
-
- return journal_file_move_to_entry_by_offset_for_data(f, dp, after_offset, direction, ret, offset);
-
- } else if (m->type == MATCH_OR_TERM) {
- Match *i;
-
- /* Find the earliest match beyond after_offset */
-
- LIST_FOREACH(matches, i, m->matches) {
- uint64_t cp;
-
- r = next_for_match(j, i, f, after_offset, direction, NULL, &cp);
- if (r < 0)
- return r;
- else if (r > 0) {
- if (np == 0 || (direction == DIRECTION_DOWN ? cp < np : cp > np))
- np = cp;
- }
- }
-
- if (np == 0)
- return 0;
-
- } else if (m->type == MATCH_AND_TERM) {
- Match *i, *last_moved;
-
- /* Always jump to the next matching entry and repeat
- * this until we find an offset that matches for all
- * matches. */
-
- if (!m->matches)
- return 0;
-
- r = next_for_match(j, m->matches, f, after_offset, direction, NULL, &np);
- if (r <= 0)
- return r;
-
- assert(direction == DIRECTION_DOWN ? np >= after_offset : np <= after_offset);
- last_moved = m->matches;
-
- LIST_LOOP_BUT_ONE(matches, i, m->matches, last_moved) {
- uint64_t cp;
-
- r = next_for_match(j, i, f, np, direction, NULL, &cp);
- if (r <= 0)
- return r;
-
- assert(direction == DIRECTION_DOWN ? cp >= np : cp <= np);
- if (direction == DIRECTION_DOWN ? cp > np : cp < np) {
- np = cp;
- last_moved = i;
- }
- }
- }
-
- assert(np > 0);
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n);
- if (r < 0)
- return r;
-
- if (ret)
- *ret = n;
- if (offset)
- *offset = np;
-
- return 1;
-}
-
-static int find_location_for_match(
- sd_journal *j,
- Match *m,
- JournalFile *f,
- direction_t direction,
- Object **ret,
- uint64_t *offset) {
-
- int r;
-
- assert(j);
- assert(m);
- assert(f);
-
- if (m->type == MATCH_DISCRETE) {
- uint64_t dp;
-
- r = journal_file_find_data_object_with_hash(f, m->data, m->size, le64toh(m->le_hash), NULL, &dp);
- if (r <= 0)
- return r;
-
- /* FIXME: missing: find by monotonic */
-
- if (j->current_location.type == LOCATION_HEAD)
- return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, ret, offset);
- if (j->current_location.type == LOCATION_TAIL)
- return journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, ret, offset);
- if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
- return journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, ret, offset);
- if (j->current_location.monotonic_set) {
- r = journal_file_move_to_entry_by_monotonic_for_data(f, dp, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset);
- if (r != -ENOENT)
- return r;
- }
- if (j->current_location.realtime_set)
- return journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, ret, offset);
-
- return journal_file_next_entry_for_data(f, NULL, 0, dp, direction, ret, offset);
-
- } else if (m->type == MATCH_OR_TERM) {
- uint64_t np = 0;
- Object *n;
- Match *i;
-
- /* Find the earliest match */
-
- LIST_FOREACH(matches, i, m->matches) {
- uint64_t cp;
-
- r = find_location_for_match(j, i, f, direction, NULL, &cp);
- if (r < 0)
- return r;
- else if (r > 0) {
- if (np == 0 || (direction == DIRECTION_DOWN ? np > cp : np < cp))
- np = cp;
- }
- }
-
- if (np == 0)
- return 0;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, np, &n);
- if (r < 0)
- return r;
-
- if (ret)
- *ret = n;
- if (offset)
- *offset = np;
-
- return 1;
-
- } else {
- Match *i;
- uint64_t np = 0;
-
- assert(m->type == MATCH_AND_TERM);
-
- /* First jump to the last match, and then find the
- * next one where all matches match */
-
- if (!m->matches)
- return 0;
-
- LIST_FOREACH(matches, i, m->matches) {
- uint64_t cp;
-
- r = find_location_for_match(j, i, f, direction, NULL, &cp);
- if (r <= 0)
- return r;
-
- if (np == 0 || (direction == DIRECTION_DOWN ? cp > np : cp < np))
- np = cp;
- }
-
- return next_for_match(j, m, f, np, direction, ret, offset);
- }
-}
-
-static int find_location_with_matches(
- sd_journal *j,
- JournalFile *f,
- direction_t direction,
- Object **ret,
- uint64_t *offset) {
-
- int r;
-
- assert(j);
- assert(f);
- assert(ret);
- assert(offset);
-
- if (!j->level0) {
- /* No matches is simple */
-
- if (j->current_location.type == LOCATION_HEAD)
- return journal_file_next_entry(f, 0, DIRECTION_DOWN, ret, offset);
- if (j->current_location.type == LOCATION_TAIL)
- return journal_file_next_entry(f, 0, DIRECTION_UP, ret, offset);
- if (j->current_location.seqnum_set && sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id))
- return journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, ret, offset);
- if (j->current_location.monotonic_set) {
- r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, ret, offset);
- if (r != -ENOENT)
- return r;
- }
- if (j->current_location.realtime_set)
- return journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, ret, offset);
-
- return journal_file_next_entry(f, 0, direction, ret, offset);
- } else
- return find_location_for_match(j, j->level0, f, direction, ret, offset);
-}
-
-static int next_with_matches(
- sd_journal *j,
- JournalFile *f,
- direction_t direction,
- Object **ret,
- uint64_t *offset) {
-
- assert(j);
- assert(f);
- assert(ret);
- assert(offset);
-
- /* No matches is easy. We simple advance the file
- * pointer by one. */
- if (!j->level0)
- return journal_file_next_entry(f, f->current_offset, direction, ret, offset);
-
- /* If we have a match then we look for the next matching entry
- * with an offset at least one step larger */
- return next_for_match(j, j->level0, f,
- direction == DIRECTION_DOWN ? f->current_offset + 1
- : f->current_offset - 1,
- direction, ret, offset);
-}
-
-static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction) {
- Object *c;
- uint64_t cp, n_entries;
- int r;
-
- assert(j);
- assert(f);
-
- n_entries = le64toh(f->header->n_entries);
-
- /* If we hit EOF before, we don't need to look into this file again
- * unless direction changed or new entries appeared. */
- if (f->last_direction == direction && f->location_type == LOCATION_TAIL &&
- n_entries == f->last_n_entries)
- return 0;
-
- f->last_n_entries = n_entries;
-
- if (f->last_direction == direction && f->current_offset > 0) {
- /* LOCATION_SEEK here means we did the work in a previous
- * iteration and the current location already points to a
- * candidate entry. */
- if (f->location_type != LOCATION_SEEK) {
- r = next_with_matches(j, f, direction, &c, &cp);
- if (r <= 0)
- return r;
-
- journal_file_save_location(f, c, cp);
- }
- } else {
- f->last_direction = direction;
-
- r = find_location_with_matches(j, f, direction, &c, &cp);
- if (r <= 0)
- return r;
-
- journal_file_save_location(f, c, cp);
- }
-
- /* OK, we found the spot, now let's advance until an entry
- * that is actually different from what we were previously
- * looking at. This is necessary to handle entries which exist
- * in two (or more) journal files, and which shall all be
- * suppressed but one. */
-
- for (;;) {
- bool found;
-
- if (j->current_location.type == LOCATION_DISCRETE) {
- int k;
-
- k = compare_with_location(f, &j->current_location);
-
- found = direction == DIRECTION_DOWN ? k > 0 : k < 0;
- } else
- found = true;
-
- if (found)
- return 1;
-
- r = next_with_matches(j, f, direction, &c, &cp);
- if (r <= 0)
- return r;
-
- journal_file_save_location(f, c, cp);
- }
-}
-
-static int real_journal_next(sd_journal *j, direction_t direction) {
- JournalFile *f, *new_file = NULL;
- Iterator i;
- Object *o;
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- bool found;
-
- r = next_beyond_location(j, f, direction);
- if (r < 0) {
- log_debug_errno(r, "Can't iterate through %s, ignoring: %m", f->path);
- remove_file_real(j, f);
- continue;
- } else if (r == 0) {
- f->location_type = LOCATION_TAIL;
- continue;
- }
-
- if (!new_file)
- found = true;
- else {
- int k;
-
- k = journal_file_compare_locations(f, new_file);
-
- found = direction == DIRECTION_DOWN ? k < 0 : k > 0;
- }
-
- if (found)
- new_file = f;
- }
-
- if (!new_file)
- return 0;
-
- r = journal_file_move_to_object(new_file, OBJECT_ENTRY, new_file->current_offset, &o);
- if (r < 0)
- return r;
-
- set_location(j, new_file, o);
-
- return 1;
-}
-
-_public_ int sd_journal_next(sd_journal *j) {
- return real_journal_next(j, DIRECTION_DOWN);
-}
-
-_public_ int sd_journal_previous(sd_journal *j) {
- return real_journal_next(j, DIRECTION_UP);
-}
-
-static int real_journal_next_skip(sd_journal *j, direction_t direction, uint64_t skip) {
- int c = 0, r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- if (skip == 0) {
- /* If this is not a discrete skip, then at least
- * resolve the current location */
- if (j->current_location.type != LOCATION_DISCRETE)
- return real_journal_next(j, direction);
-
- return 0;
- }
-
- do {
- r = real_journal_next(j, direction);
- if (r < 0)
- return r;
-
- if (r == 0)
- return c;
-
- skip--;
- c++;
- } while (skip > 0);
-
- return c;
-}
-
-_public_ int sd_journal_next_skip(sd_journal *j, uint64_t skip) {
- return real_journal_next_skip(j, DIRECTION_DOWN, skip);
-}
-
-_public_ int sd_journal_previous_skip(sd_journal *j, uint64_t skip) {
- return real_journal_next_skip(j, DIRECTION_UP, skip);
-}
-
-_public_ int sd_journal_get_cursor(sd_journal *j, char **cursor) {
- Object *o;
- int r;
- char bid[33], sid[33];
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(cursor, -EINVAL);
-
- if (!j->current_file || j->current_file->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o);
- if (r < 0)
- return r;
-
- sd_id128_to_string(j->current_file->header->seqnum_id, sid);
- sd_id128_to_string(o->entry.boot_id, bid);
-
- if (asprintf(cursor,
- "s=%s;i=%"PRIx64";b=%s;m=%"PRIx64";t=%"PRIx64";x=%"PRIx64,
- sid, le64toh(o->entry.seqnum),
- bid, le64toh(o->entry.monotonic),
- le64toh(o->entry.realtime),
- le64toh(o->entry.xor_hash)) < 0)
- return -ENOMEM;
-
- return 0;
-}
-
-_public_ int sd_journal_seek_cursor(sd_journal *j, const char *cursor) {
- const char *word, *state;
- size_t l;
- unsigned long long seqnum, monotonic, realtime, xor_hash;
- bool
- seqnum_id_set = false,
- seqnum_set = false,
- boot_id_set = false,
- monotonic_set = false,
- realtime_set = false,
- xor_hash_set = false;
- sd_id128_t seqnum_id, boot_id;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(!isempty(cursor), -EINVAL);
-
- FOREACH_WORD_SEPARATOR(word, l, cursor, ";", state) {
- char *item;
- int k = 0;
-
- if (l < 2 || word[1] != '=')
- return -EINVAL;
-
- item = strndup(word, l);
- if (!item)
- return -ENOMEM;
-
- switch (word[0]) {
-
- case 's':
- seqnum_id_set = true;
- k = sd_id128_from_string(item+2, &seqnum_id);
- break;
-
- case 'i':
- seqnum_set = true;
- if (sscanf(item+2, "%llx", &seqnum) != 1)
- k = -EINVAL;
- break;
-
- case 'b':
- boot_id_set = true;
- k = sd_id128_from_string(item+2, &boot_id);
- break;
-
- case 'm':
- monotonic_set = true;
- if (sscanf(item+2, "%llx", &monotonic) != 1)
- k = -EINVAL;
- break;
-
- case 't':
- realtime_set = true;
- if (sscanf(item+2, "%llx", &realtime) != 1)
- k = -EINVAL;
- break;
-
- case 'x':
- xor_hash_set = true;
- if (sscanf(item+2, "%llx", &xor_hash) != 1)
- k = -EINVAL;
- break;
- }
-
- free(item);
-
- if (k < 0)
- return k;
- }
-
- if ((!seqnum_set || !seqnum_id_set) &&
- (!monotonic_set || !boot_id_set) &&
- !realtime_set)
- return -EINVAL;
-
- reset_location(j);
-
- j->current_location.type = LOCATION_SEEK;
-
- if (realtime_set) {
- j->current_location.realtime = (uint64_t) realtime;
- j->current_location.realtime_set = true;
- }
-
- if (seqnum_set && seqnum_id_set) {
- j->current_location.seqnum = (uint64_t) seqnum;
- j->current_location.seqnum_id = seqnum_id;
- j->current_location.seqnum_set = true;
- }
-
- if (monotonic_set && boot_id_set) {
- j->current_location.monotonic = (uint64_t) monotonic;
- j->current_location.boot_id = boot_id;
- j->current_location.monotonic_set = true;
- }
-
- if (xor_hash_set) {
- j->current_location.xor_hash = (uint64_t) xor_hash;
- j->current_location.xor_hash_set = true;
- }
-
- return 0;
-}
-
-_public_ int sd_journal_test_cursor(sd_journal *j, const char *cursor) {
- int r;
- const char *word, *state;
- size_t l;
- Object *o;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(!isempty(cursor), -EINVAL);
-
- if (!j->current_file || j->current_file->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o);
- if (r < 0)
- return r;
-
- FOREACH_WORD_SEPARATOR(word, l, cursor, ";", state) {
- _cleanup_free_ char *item = NULL;
- sd_id128_t id;
- unsigned long long ll;
- int k = 0;
-
- if (l < 2 || word[1] != '=')
- return -EINVAL;
-
- item = strndup(word, l);
- if (!item)
- return -ENOMEM;
-
- switch (word[0]) {
-
- case 's':
- k = sd_id128_from_string(item+2, &id);
- if (k < 0)
- return k;
- if (!sd_id128_equal(id, j->current_file->header->seqnum_id))
- return 0;
- break;
-
- case 'i':
- if (sscanf(item+2, "%llx", &ll) != 1)
- return -EINVAL;
- if (ll != le64toh(o->entry.seqnum))
- return 0;
- break;
-
- case 'b':
- k = sd_id128_from_string(item+2, &id);
- if (k < 0)
- return k;
- if (!sd_id128_equal(id, o->entry.boot_id))
- return 0;
- break;
-
- case 'm':
- if (sscanf(item+2, "%llx", &ll) != 1)
- return -EINVAL;
- if (ll != le64toh(o->entry.monotonic))
- return 0;
- break;
-
- case 't':
- if (sscanf(item+2, "%llx", &ll) != 1)
- return -EINVAL;
- if (ll != le64toh(o->entry.realtime))
- return 0;
- break;
-
- case 'x':
- if (sscanf(item+2, "%llx", &ll) != 1)
- return -EINVAL;
- if (ll != le64toh(o->entry.xor_hash))
- return 0;
- break;
- }
- }
-
- return 1;
-}
-
-
-_public_ int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- reset_location(j);
- j->current_location.type = LOCATION_SEEK;
- j->current_location.boot_id = boot_id;
- j->current_location.monotonic = usec;
- j->current_location.monotonic_set = true;
-
- return 0;
-}
-
-_public_ int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- reset_location(j);
- j->current_location.type = LOCATION_SEEK;
- j->current_location.realtime = usec;
- j->current_location.realtime_set = true;
-
- return 0;
-}
-
-_public_ int sd_journal_seek_head(sd_journal *j) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- reset_location(j);
- j->current_location.type = LOCATION_HEAD;
-
- return 0;
-}
-
-_public_ int sd_journal_seek_tail(sd_journal *j) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- reset_location(j);
- j->current_location.type = LOCATION_TAIL;
-
- return 0;
-}
-
-static void check_network(sd_journal *j, int fd) {
- struct statfs sfs;
-
- assert(j);
-
- if (j->on_network)
- return;
-
- if (fstatfs(fd, &sfs) < 0)
- return;
-
- j->on_network =
- F_TYPE_EQUAL(sfs.f_type, CIFS_MAGIC_NUMBER) ||
- F_TYPE_EQUAL(sfs.f_type, CODA_SUPER_MAGIC) ||
- F_TYPE_EQUAL(sfs.f_type, NCP_SUPER_MAGIC) ||
- F_TYPE_EQUAL(sfs.f_type, NFS_SUPER_MAGIC) ||
- F_TYPE_EQUAL(sfs.f_type, SMB_SUPER_MAGIC);
-}
-
-static bool file_has_type_prefix(const char *prefix, const char *filename) {
- const char *full, *tilded, *atted;
-
- full = strjoina(prefix, ".journal");
- tilded = strjoina(full, "~");
- atted = strjoina(prefix, "@");
-
- return streq(filename, full) ||
- streq(filename, tilded) ||
- startswith(filename, atted);
-}
-
-static bool file_type_wanted(int flags, const char *filename) {
- if (!endswith(filename, ".journal") && !endswith(filename, ".journal~"))
- return false;
-
- /* no flags set → every type is OK */
- if (!(flags & (SD_JOURNAL_SYSTEM | SD_JOURNAL_CURRENT_USER)))
- return true;
-
- if (flags & SD_JOURNAL_SYSTEM && file_has_type_prefix("system", filename))
- return true;
-
- if (flags & SD_JOURNAL_CURRENT_USER) {
- char prefix[5 + DECIMAL_STR_MAX(uid_t) + 1];
-
- xsprintf(prefix, "user-"UID_FMT, getuid());
-
- if (file_has_type_prefix(prefix, filename))
- return true;
- }
-
- return false;
-}
-
-static int add_any_file(sd_journal *j, const char *path) {
- JournalFile *f = NULL;
- int r;
-
- assert(j);
- assert(path);
-
- if (ordered_hashmap_get(j->files, path))
- return 0;
-
- if (ordered_hashmap_size(j->files) >= JOURNAL_FILES_MAX) {
- log_warning("Too many open journal files, not adding %s.", path);
- return set_put_error(j, -ETOOMANYREFS);
- }
-
- r = journal_file_open(path, O_RDONLY, 0, false, false, NULL, j->mmap, NULL, &f);
- if (r < 0)
- return r;
-
- /* journal_file_dump(f); */
-
- r = ordered_hashmap_put(j->files, f->path, f);
- if (r < 0) {
- journal_file_close(f);
- return r;
- }
-
- log_debug("File %s added.", f->path);
-
- check_network(j, f->fd);
-
- j->current_invalidate_counter ++;
-
- return 0;
-}
-
-static int add_file(sd_journal *j, const char *prefix, const char *filename) {
- _cleanup_free_ char *path = NULL;
- int r;
-
- assert(j);
- assert(prefix);
- assert(filename);
-
- if (j->no_new_files ||
- !file_type_wanted(j->flags, filename))
- return 0;
-
- path = strjoin(prefix, "/", filename, NULL);
- if (!path)
- return -ENOMEM;
-
- r = add_any_file(j, path);
- if (r == -ENOENT)
- return 0;
- return r;
-}
-
-static int remove_file(sd_journal *j, const char *prefix, const char *filename) {
- _cleanup_free_ char *path;
- JournalFile *f;
-
- assert(j);
- assert(prefix);
- assert(filename);
-
- path = strjoin(prefix, "/", filename, NULL);
- if (!path)
- return -ENOMEM;
-
- f = ordered_hashmap_get(j->files, path);
- if (!f)
- return 0;
-
- remove_file_real(j, f);
- return 0;
-}
-
-static void remove_file_real(sd_journal *j, JournalFile *f) {
- assert(j);
- assert(f);
-
- ordered_hashmap_remove(j->files, f->path);
-
- log_debug("File %s removed.", f->path);
-
- if (j->current_file == f) {
- j->current_file = NULL;
- j->current_field = 0;
- }
-
- if (j->unique_file == f) {
- /* Jump to the next unique_file or NULL if that one was last */
- j->unique_file = ordered_hashmap_next(j->files, j->unique_file->path);
- j->unique_offset = 0;
- if (!j->unique_file)
- j->unique_file_lost = true;
- }
-
- journal_file_close(f);
-
- j->current_invalidate_counter ++;
-}
-
-static int add_directory(sd_journal *j, const char *prefix, const char *dirname) {
- _cleanup_free_ char *path = NULL;
- int r;
- _cleanup_closedir_ DIR *d = NULL;
- sd_id128_t id, mid;
- Directory *m;
-
- assert(j);
- assert(prefix);
- assert(dirname);
-
- log_debug("Considering %s/%s.", prefix, dirname);
-
- if ((j->flags & SD_JOURNAL_LOCAL_ONLY) &&
- (sd_id128_from_string(dirname, &id) < 0 ||
- sd_id128_get_machine(&mid) < 0 ||
- !(sd_id128_equal(id, mid) || path_startswith(prefix, "/run"))))
- return 0;
-
- path = strjoin(prefix, "/", dirname, NULL);
- if (!path)
- return -ENOMEM;
-
- d = opendir(path);
- if (!d) {
- log_debug_errno(errno, "Failed to open %s: %m", path);
- if (errno == ENOENT)
- return 0;
- return -errno;
- }
-
- m = hashmap_get(j->directories_by_path, path);
- if (!m) {
- m = new0(Directory, 1);
- if (!m)
- return -ENOMEM;
-
- m->is_root = false;
- m->path = path;
-
- if (hashmap_put(j->directories_by_path, m->path, m) < 0) {
- free(m);
- return -ENOMEM;
- }
-
- path = NULL; /* avoid freeing in cleanup */
- j->current_invalidate_counter ++;
-
- log_debug("Directory %s added.", m->path);
-
- } else if (m->is_root)
- return 0;
-
- if (m->wd <= 0 && j->inotify_fd >= 0) {
-
- m->wd = inotify_add_watch(j->inotify_fd, m->path,
- IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
- IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT|IN_MOVED_FROM|
- IN_ONLYDIR);
-
- if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0)
- inotify_rm_watch(j->inotify_fd, m->wd);
- }
-
- for (;;) {
- struct dirent *de;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno != 0) {
- r = -errno;
- log_debug_errno(errno, "Failed to read directory %s: %m", m->path);
- return r;
- }
- if (!de)
- break;
-
- if (dirent_is_file_with_suffix(de, ".journal") ||
- dirent_is_file_with_suffix(de, ".journal~")) {
- r = add_file(j, m->path, de->d_name);
- if (r < 0) {
- log_debug_errno(r, "Failed to add file %s/%s: %m",
- m->path, de->d_name);
- r = set_put_error(j, r);
- if (r < 0)
- return r;
- }
- }
- }
-
- check_network(j, dirfd(d));
-
- return 0;
-}
-
-static int add_root_directory(sd_journal *j, const char *p) {
- _cleanup_closedir_ DIR *d = NULL;
- Directory *m;
- int r;
-
- assert(j);
- assert(p);
-
- if ((j->flags & SD_JOURNAL_RUNTIME_ONLY) &&
- !path_startswith(p, "/run"))
- return -EINVAL;
-
- if (j->prefix)
- p = strjoina(j->prefix, p);
-
- d = opendir(p);
- if (!d)
- return -errno;
-
- m = hashmap_get(j->directories_by_path, p);
- if (!m) {
- m = new0(Directory, 1);
- if (!m)
- return -ENOMEM;
-
- m->is_root = true;
- m->path = strdup(p);
- if (!m->path) {
- free(m);
- return -ENOMEM;
- }
-
- if (hashmap_put(j->directories_by_path, m->path, m) < 0) {
- free(m->path);
- free(m);
- return -ENOMEM;
- }
-
- j->current_invalidate_counter ++;
-
- log_debug("Root directory %s added.", m->path);
-
- } else if (!m->is_root)
- return 0;
-
- if (m->wd <= 0 && j->inotify_fd >= 0) {
-
- m->wd = inotify_add_watch(j->inotify_fd, m->path,
- IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE|
- IN_ONLYDIR);
-
- if (m->wd > 0 && hashmap_put(j->directories_by_wd, INT_TO_PTR(m->wd), m) < 0)
- inotify_rm_watch(j->inotify_fd, m->wd);
- }
-
- if (j->no_new_files)
- return 0;
-
- for (;;) {
- struct dirent *de;
- sd_id128_t id;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno != 0) {
- r = -errno;
- log_debug_errno(errno, "Failed to read directory %s: %m", m->path);
- return r;
- }
- if (!de)
- break;
-
- if (dirent_is_file_with_suffix(de, ".journal") ||
- dirent_is_file_with_suffix(de, ".journal~")) {
- r = add_file(j, m->path, de->d_name);
- if (r < 0) {
- log_debug_errno(r, "Failed to add file %s/%s: %m",
- m->path, de->d_name);
- r = set_put_error(j, r);
- if (r < 0)
- return r;
- }
- } else if ((de->d_type == DT_DIR || de->d_type == DT_LNK || de->d_type == DT_UNKNOWN) &&
- sd_id128_from_string(de->d_name, &id) >= 0) {
-
- r = add_directory(j, m->path, de->d_name);
- if (r < 0)
- log_debug_errno(r, "Failed to add directory %s/%s: %m", m->path, de->d_name);
- }
- }
-
- check_network(j, dirfd(d));
-
- return 0;
-}
-
-static int remove_directory(sd_journal *j, Directory *d) {
- assert(j);
-
- if (d->wd > 0) {
- hashmap_remove(j->directories_by_wd, INT_TO_PTR(d->wd));
-
- if (j->inotify_fd >= 0)
- inotify_rm_watch(j->inotify_fd, d->wd);
- }
-
- hashmap_remove(j->directories_by_path, d->path);
-
- if (d->is_root)
- log_debug("Root directory %s removed.", d->path);
- else
- log_debug("Directory %s removed.", d->path);
-
- free(d->path);
- free(d);
-
- return 0;
-}
-
-static int add_search_paths(sd_journal *j) {
- int r;
- const char search_paths[] =
- "/run/log/journal\0"
- "/var/log/journal\0";
- const char *p;
-
- assert(j);
-
- /* We ignore most errors here, since the idea is to only open
- * what's actually accessible, and ignore the rest. */
-
- NULSTR_FOREACH(p, search_paths) {
- r = add_root_directory(j, p);
- if (r < 0 && r != -ENOENT) {
- r = set_put_error(j, r);
- if (r < 0)
- return r;
- }
- }
-
- return 0;
-}
-
-static int add_current_paths(sd_journal *j) {
- Iterator i;
- JournalFile *f;
-
- assert(j);
- assert(j->no_new_files);
-
- /* Simply adds all directories for files we have open as
- * "root" directories. We don't expect errors here, so we
- * treat them as fatal. */
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- _cleanup_free_ char *dir;
- int r;
-
- dir = dirname_malloc(f->path);
- if (!dir)
- return -ENOMEM;
-
- r = add_root_directory(j, dir);
- if (r < 0) {
- set_put_error(j, r);
- return r;
- }
- }
-
- return 0;
-}
-
-
-static int allocate_inotify(sd_journal *j) {
- assert(j);
-
- if (j->inotify_fd < 0) {
- j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
- if (j->inotify_fd < 0)
- return -errno;
- }
-
- if (!j->directories_by_wd) {
- j->directories_by_wd = hashmap_new(NULL);
- if (!j->directories_by_wd)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static sd_journal *journal_new(int flags, const char *path) {
- sd_journal *j;
-
- j = new0(sd_journal, 1);
- if (!j)
- return NULL;
-
- j->original_pid = getpid();
- j->inotify_fd = -1;
- j->flags = flags;
- j->data_threshold = DEFAULT_DATA_THRESHOLD;
-
- if (path) {
- j->path = strdup(path);
- if (!j->path)
- goto fail;
- }
-
- j->files = ordered_hashmap_new(&string_hash_ops);
- j->directories_by_path = hashmap_new(&string_hash_ops);
- j->mmap = mmap_cache_new();
- if (!j->files || !j->directories_by_path || !j->mmap)
- goto fail;
-
- return j;
-
-fail:
- sd_journal_close(j);
- return NULL;
-}
-
-_public_ int sd_journal_open(sd_journal **ret, int flags) {
- sd_journal *j;
- int r;
-
- assert_return(ret, -EINVAL);
- assert_return((flags & ~(SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_RUNTIME_ONLY|SD_JOURNAL_SYSTEM|SD_JOURNAL_CURRENT_USER)) == 0, -EINVAL);
-
- j = journal_new(flags, NULL);
- if (!j)
- return -ENOMEM;
-
- r = add_search_paths(j);
- if (r < 0)
- goto fail;
-
- *ret = j;
- return 0;
-
-fail:
- sd_journal_close(j);
-
- return r;
-}
-
-_public_ int sd_journal_open_container(sd_journal **ret, const char *machine, int flags) {
- _cleanup_free_ char *root = NULL, *class = NULL;
- sd_journal *j;
- char *p;
- int r;
-
- assert_return(machine, -EINVAL);
- assert_return(ret, -EINVAL);
- assert_return((flags & ~(SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM)) == 0, -EINVAL);
- assert_return(machine_name_is_valid(machine), -EINVAL);
-
- p = strjoina("/run/systemd/machines/", machine);
- r = parse_env_file(p, NEWLINE, "ROOT", &root, "CLASS", &class, NULL);
- if (r == -ENOENT)
- return -EHOSTDOWN;
- if (r < 0)
- return r;
- if (!root)
- return -ENODATA;
-
- if (!streq_ptr(class, "container"))
- return -EIO;
-
- j = journal_new(flags, NULL);
- if (!j)
- return -ENOMEM;
-
- j->prefix = root;
- root = NULL;
-
- r = add_search_paths(j);
- if (r < 0)
- goto fail;
-
- *ret = j;
- return 0;
-
-fail:
- sd_journal_close(j);
- return r;
-}
-
-_public_ int sd_journal_open_directory(sd_journal **ret, const char *path, int flags) {
- sd_journal *j;
- int r;
-
- assert_return(ret, -EINVAL);
- assert_return(path, -EINVAL);
- assert_return(flags == 0, -EINVAL);
-
- j = journal_new(flags, path);
- if (!j)
- return -ENOMEM;
-
- r = add_root_directory(j, path);
- if (r < 0) {
- set_put_error(j, r);
- goto fail;
- }
-
- *ret = j;
- return 0;
-
-fail:
- sd_journal_close(j);
-
- return r;
-}
-
-_public_ int sd_journal_open_files(sd_journal **ret, const char **paths, int flags) {
- sd_journal *j;
- const char **path;
- int r;
-
- assert_return(ret, -EINVAL);
- assert_return(flags == 0, -EINVAL);
-
- j = journal_new(flags, NULL);
- if (!j)
- return -ENOMEM;
-
- STRV_FOREACH(path, paths) {
- r = add_any_file(j, *path);
- if (r < 0) {
- log_error_errno(r, "Failed to open %s: %m", *path);
- goto fail;
- }
- }
-
- j->no_new_files = true;
-
- *ret = j;
- return 0;
-
-fail:
- sd_journal_close(j);
-
- return r;
-}
-
-_public_ void sd_journal_close(sd_journal *j) {
- Directory *d;
- JournalFile *f;
-
- if (!j)
- return;
-
- sd_journal_flush_matches(j);
-
- while ((f = ordered_hashmap_steal_first(j->files)))
- journal_file_close(f);
-
- ordered_hashmap_free(j->files);
-
- while ((d = hashmap_first(j->directories_by_path)))
- remove_directory(j, d);
-
- while ((d = hashmap_first(j->directories_by_wd)))
- remove_directory(j, d);
-
- hashmap_free(j->directories_by_path);
- hashmap_free(j->directories_by_wd);
-
- safe_close(j->inotify_fd);
-
- if (j->mmap) {
- log_debug("mmap cache statistics: %u hit, %u miss", mmap_cache_get_hit(j->mmap), mmap_cache_get_missed(j->mmap));
- mmap_cache_unref(j->mmap);
- }
-
- free(j->path);
- free(j->prefix);
- free(j->unique_field);
- set_free(j->errors);
- free(j);
-}
-
-_public_ int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) {
- Object *o;
- JournalFile *f;
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(ret, -EINVAL);
-
- f = j->current_file;
- if (!f)
- return -EADDRNOTAVAIL;
-
- if (f->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0)
- return r;
-
- *ret = le64toh(o->entry.realtime);
- return 0;
-}
-
-_public_ int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) {
- Object *o;
- JournalFile *f;
- int r;
- sd_id128_t id;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- f = j->current_file;
- if (!f)
- return -EADDRNOTAVAIL;
-
- if (f->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0)
- return r;
-
- if (ret_boot_id)
- *ret_boot_id = o->entry.boot_id;
- else {
- r = sd_id128_get_boot(&id);
- if (r < 0)
- return r;
-
- if (!sd_id128_equal(id, o->entry.boot_id))
- return -ESTALE;
- }
-
- if (ret)
- *ret = le64toh(o->entry.monotonic);
-
- return 0;
-}
-
-static bool field_is_valid(const char *field) {
- const char *p;
-
- assert(field);
-
- if (isempty(field))
- return false;
-
- if (startswith(field, "__"))
- return false;
-
- for (p = field; *p; p++) {
-
- if (*p == '_')
- continue;
-
- if (*p >= 'A' && *p <= 'Z')
- continue;
-
- if (*p >= '0' && *p <= '9')
- continue;
-
- return false;
- }
-
- return true;
-}
-
-_public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) {
- JournalFile *f;
- uint64_t i, n;
- size_t field_length;
- int r;
- Object *o;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(field, -EINVAL);
- assert_return(data, -EINVAL);
- assert_return(size, -EINVAL);
- assert_return(field_is_valid(field), -EINVAL);
-
- f = j->current_file;
- if (!f)
- return -EADDRNOTAVAIL;
-
- if (f->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0)
- return r;
-
- field_length = strlen(field);
-
- n = journal_file_entry_n_items(o);
- for (i = 0; i < n; i++) {
- uint64_t p, l;
- le64_t le_hash;
- size_t t;
- int compression;
-
- p = le64toh(o->entry.items[i].object_offset);
- le_hash = o->entry.items[i].hash;
- r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
- if (r < 0)
- return r;
-
- if (le_hash != o->data.hash)
- return -EBADMSG;
-
- l = le64toh(o->object.size) - offsetof(Object, data.payload);
-
- compression = o->object.flags & OBJECT_COMPRESSION_MASK;
- if (compression) {
-#if defined(HAVE_XZ) || defined(HAVE_LZ4)
- if (decompress_startswith(compression,
- o->data.payload, l,
- &f->compress_buffer, &f->compress_buffer_size,
- field, field_length, '=')) {
-
- size_t rsize;
-
- r = decompress_blob(compression,
- o->data.payload, l,
- &f->compress_buffer, &f->compress_buffer_size, &rsize,
- j->data_threshold);
- if (r < 0)
- return r;
-
- *data = f->compress_buffer;
- *size = (size_t) rsize;
-
- return 0;
- }
-#else
- return -EPROTONOSUPPORT;
-#endif
- } else if (l >= field_length+1 &&
- memcmp(o->data.payload, field, field_length) == 0 &&
- o->data.payload[field_length] == '=') {
-
- t = (size_t) l;
-
- if ((uint64_t) t != l)
- return -E2BIG;
-
- *data = o->data.payload;
- *size = t;
-
- return 0;
- }
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0)
- return r;
- }
-
- return -ENOENT;
-}
-
-static int return_data(sd_journal *j, JournalFile *f, Object *o, const void **data, size_t *size) {
- size_t t;
- uint64_t l;
- int compression;
-
- l = le64toh(o->object.size) - offsetof(Object, data.payload);
- t = (size_t) l;
-
- /* We can't read objects larger than 4G on a 32bit machine */
- if ((uint64_t) t != l)
- return -E2BIG;
-
- compression = o->object.flags & OBJECT_COMPRESSION_MASK;
- if (compression) {
-#if defined(HAVE_XZ) || defined(HAVE_LZ4)
- size_t rsize;
- int r;
-
- r = decompress_blob(compression,
- o->data.payload, l, &f->compress_buffer,
- &f->compress_buffer_size, &rsize, j->data_threshold);
- if (r < 0)
- return r;
-
- *data = f->compress_buffer;
- *size = (size_t) rsize;
-#else
- return -EPROTONOSUPPORT;
-#endif
- } else {
- *data = o->data.payload;
- *size = t;
- }
-
- return 0;
-}
-
-_public_ int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) {
- JournalFile *f;
- uint64_t p, n;
- le64_t le_hash;
- int r;
- Object *o;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(data, -EINVAL);
- assert_return(size, -EINVAL);
-
- f = j->current_file;
- if (!f)
- return -EADDRNOTAVAIL;
-
- if (f->current_offset <= 0)
- return -EADDRNOTAVAIL;
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0)
- return r;
-
- n = journal_file_entry_n_items(o);
- if (j->current_field >= n)
- return 0;
-
- p = le64toh(o->entry.items[j->current_field].object_offset);
- le_hash = o->entry.items[j->current_field].hash;
- r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
- if (r < 0)
- return r;
-
- if (le_hash != o->data.hash)
- return -EBADMSG;
-
- r = return_data(j, f, o, data, size);
- if (r < 0)
- return r;
-
- j->current_field ++;
-
- return 1;
-}
-
-_public_ void sd_journal_restart_data(sd_journal *j) {
- if (!j)
- return;
-
- j->current_field = 0;
-}
-
-_public_ int sd_journal_get_fd(sd_journal *j) {
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- if (j->inotify_fd >= 0)
- return j->inotify_fd;
-
- r = allocate_inotify(j);
- if (r < 0)
- return r;
-
- /* Iterate through all dirs again, to add them to the
- * inotify */
- if (j->no_new_files)
- r = add_current_paths(j);
- else if (j->path)
- r = add_root_directory(j, j->path);
- else
- r = add_search_paths(j);
- if (r < 0)
- return r;
-
- return j->inotify_fd;
-}
-
-_public_ int sd_journal_get_events(sd_journal *j) {
- int fd;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- fd = sd_journal_get_fd(j);
- if (fd < 0)
- return fd;
-
- return POLLIN;
-}
-
-_public_ int sd_journal_get_timeout(sd_journal *j, uint64_t *timeout_usec) {
- int fd;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(timeout_usec, -EINVAL);
-
- fd = sd_journal_get_fd(j);
- if (fd < 0)
- return fd;
-
- if (!j->on_network) {
- *timeout_usec = (uint64_t) -1;
- return 0;
- }
-
- /* If we are on the network we need to regularly check for
- * changes manually */
-
- *timeout_usec = j->last_process_usec + JOURNAL_FILES_RECHECK_USEC;
- return 1;
-}
-
-static void process_inotify_event(sd_journal *j, struct inotify_event *e) {
- Directory *d;
- int r;
-
- assert(j);
- assert(e);
-
- /* Is this a subdirectory we watch? */
- d = hashmap_get(j->directories_by_wd, INT_TO_PTR(e->wd));
- if (d) {
- sd_id128_t id;
-
- if (!(e->mask & IN_ISDIR) && e->len > 0 &&
- (endswith(e->name, ".journal") ||
- endswith(e->name, ".journal~"))) {
-
- /* Event for a journal file */
-
- if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
- r = add_file(j, d->path, e->name);
- if (r < 0) {
- log_debug_errno(r, "Failed to add file %s/%s: %m",
- d->path, e->name);
- set_put_error(j, r);
- }
-
- } else if (e->mask & (IN_DELETE|IN_MOVED_FROM|IN_UNMOUNT)) {
-
- r = remove_file(j, d->path, e->name);
- if (r < 0)
- log_debug_errno(r, "Failed to remove file %s/%s: %m", d->path, e->name);
- }
-
- } else if (!d->is_root && e->len == 0) {
-
- /* Event for a subdirectory */
-
- if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT)) {
- r = remove_directory(j, d);
- if (r < 0)
- log_debug_errno(r, "Failed to remove directory %s: %m", d->path);
- }
-
-
- } else if (d->is_root && (e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) {
-
- /* Event for root directory */
-
- if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) {
- r = add_directory(j, d->path, e->name);
- if (r < 0)
- log_debug_errno(r, "Failed to add directory %s/%s: %m", d->path, e->name);
- }
- }
-
- return;
- }
-
- if (e->mask & IN_IGNORED)
- return;
-
- log_warning("Unknown inotify event.");
-}
-
-static int determine_change(sd_journal *j) {
- bool b;
-
- assert(j);
-
- b = j->current_invalidate_counter != j->last_invalidate_counter;
- j->last_invalidate_counter = j->current_invalidate_counter;
-
- return b ? SD_JOURNAL_INVALIDATE : SD_JOURNAL_APPEND;
-}
-
-_public_ int sd_journal_process(sd_journal *j) {
- bool got_something = false;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- j->last_process_usec = now(CLOCK_MONOTONIC);
-
- for (;;) {
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
-
- l = read(j->inotify_fd, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EAGAIN || errno == EINTR)
- return got_something ? determine_change(j) : SD_JOURNAL_NOP;
-
- return -errno;
- }
-
- got_something = true;
-
- FOREACH_INOTIFY_EVENT(e, buffer, l)
- process_inotify_event(j, e);
- }
-}
-
-_public_ int sd_journal_wait(sd_journal *j, uint64_t timeout_usec) {
- int r;
- uint64_t t;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- if (j->inotify_fd < 0) {
-
- /* This is the first invocation, hence create the
- * inotify watch */
- r = sd_journal_get_fd(j);
- if (r < 0)
- return r;
-
- /* The journal might have changed since the context
- * object was created and we weren't watching before,
- * hence don't wait for anything, and return
- * immediately. */
- return determine_change(j);
- }
-
- r = sd_journal_get_timeout(j, &t);
- if (r < 0)
- return r;
-
- if (t != (uint64_t) -1) {
- usec_t n;
-
- n = now(CLOCK_MONOTONIC);
- t = t > n ? t - n : 0;
-
- if (timeout_usec == (uint64_t) -1 || timeout_usec > t)
- timeout_usec = t;
- }
-
- do {
- r = fd_wait_for_event(j->inotify_fd, POLLIN, timeout_usec);
- } while (r == -EINTR);
-
- if (r < 0)
- return r;
-
- return sd_journal_process(j);
-}
-
-_public_ int sd_journal_get_cutoff_realtime_usec(sd_journal *j, uint64_t *from, uint64_t *to) {
- Iterator i;
- JournalFile *f;
- bool first = true;
- uint64_t fmin = 0, tmax = 0;
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(from || to, -EINVAL);
- assert_return(from != to, -EINVAL);
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- usec_t fr, t;
-
- r = journal_file_get_cutoff_realtime_usec(f, &fr, &t);
- if (r == -ENOENT)
- continue;
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- if (first) {
- fmin = fr;
- tmax = t;
- first = false;
- } else {
- fmin = MIN(fr, fmin);
- tmax = MAX(t, tmax);
- }
- }
-
- if (from)
- *from = fmin;
- if (to)
- *to = tmax;
-
- return first ? 0 : 1;
-}
-
-_public_ int sd_journal_get_cutoff_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t *from, uint64_t *to) {
- Iterator i;
- JournalFile *f;
- bool found = false;
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(from || to, -EINVAL);
- assert_return(from != to, -EINVAL);
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- usec_t fr, t;
-
- r = journal_file_get_cutoff_monotonic_usec(f, boot_id, &fr, &t);
- if (r == -ENOENT)
- continue;
- if (r < 0)
- return r;
- if (r == 0)
- continue;
-
- if (found) {
- if (from)
- *from = MIN(fr, *from);
- if (to)
- *to = MAX(t, *to);
- } else {
- if (from)
- *from = fr;
- if (to)
- *to = t;
- found = true;
- }
- }
-
- return found;
-}
-
-void journal_print_header(sd_journal *j) {
- Iterator i;
- JournalFile *f;
- bool newline = false;
-
- assert(j);
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- if (newline)
- putchar('\n');
- else
- newline = true;
-
- journal_file_print_header(f);
- }
-}
-
-_public_ int sd_journal_get_usage(sd_journal *j, uint64_t *bytes) {
- Iterator i;
- JournalFile *f;
- uint64_t sum = 0;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(bytes, -EINVAL);
-
- ORDERED_HASHMAP_FOREACH(f, j->files, i) {
- struct stat st;
-
- if (fstat(f->fd, &st) < 0)
- return -errno;
-
- sum += (uint64_t) st.st_blocks * 512ULL;
- }
-
- *bytes = sum;
- return 0;
-}
-
-_public_ int sd_journal_query_unique(sd_journal *j, const char *field) {
- char *f;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(!isempty(field), -EINVAL);
- assert_return(field_is_valid(field), -EINVAL);
-
- f = strdup(field);
- if (!f)
- return -ENOMEM;
-
- free(j->unique_field);
- j->unique_field = f;
- j->unique_file = NULL;
- j->unique_offset = 0;
- j->unique_file_lost = false;
-
- return 0;
-}
-
-_public_ int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l) {
- size_t k;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(data, -EINVAL);
- assert_return(l, -EINVAL);
- assert_return(j->unique_field, -EINVAL);
-
- k = strlen(j->unique_field);
-
- if (!j->unique_file) {
- if (j->unique_file_lost)
- return 0;
-
- j->unique_file = ordered_hashmap_first(j->files);
- if (!j->unique_file)
- return 0;
-
- j->unique_offset = 0;
- }
-
- for (;;) {
- JournalFile *of;
- Iterator i;
- Object *o;
- const void *odata;
- size_t ol;
- bool found;
- int r;
-
- /* Proceed to next data object in the field's linked list */
- if (j->unique_offset == 0) {
- r = journal_file_find_field_object(j->unique_file, j->unique_field, k, &o, NULL);
- if (r < 0)
- return r;
-
- j->unique_offset = r > 0 ? le64toh(o->field.head_data_offset) : 0;
- } else {
- r = journal_file_move_to_object(j->unique_file, OBJECT_DATA, j->unique_offset, &o);
- if (r < 0)
- return r;
-
- j->unique_offset = le64toh(o->data.next_field_offset);
- }
-
- /* We reached the end of the list? Then start again, with the next file */
- if (j->unique_offset == 0) {
- j->unique_file = ordered_hashmap_next(j->files, j->unique_file->path);
- if (!j->unique_file)
- return 0;
-
- continue;
- }
-
- /* We do not use OBJECT_DATA context here, but OBJECT_UNUSED
- * instead, so that we can look at this data object at the same
- * time as one on another file */
- r = journal_file_move_to_object(j->unique_file, OBJECT_UNUSED, j->unique_offset, &o);
- if (r < 0)
- return r;
-
- /* Let's do the type check by hand, since we used 0 context above. */
- if (o->object.type != OBJECT_DATA) {
- log_debug("%s:offset " OFSfmt ": object has type %d, expected %d",
- j->unique_file->path, j->unique_offset,
- o->object.type, OBJECT_DATA);
- return -EBADMSG;
- }
-
- r = return_data(j, j->unique_file, o, &odata, &ol);
- if (r < 0)
- return r;
-
- /* Check if we have at least the field name and "=". */
- if (ol <= k) {
- log_debug("%s:offset " OFSfmt ": object has size %zu, expected at least %zu",
- j->unique_file->path, j->unique_offset,
- ol, k + 1);
- return -EBADMSG;
- }
-
- if (memcmp(odata, j->unique_field, k) || ((const char*) odata)[k] != '=') {
- log_debug("%s:offset " OFSfmt ": object does not start with \"%s=\"",
- j->unique_file->path, j->unique_offset,
- j->unique_field);
- return -EBADMSG;
- }
-
- /* OK, now let's see if we already returned this data
- * object by checking if it exists in the earlier
- * traversed files. */
- found = false;
- ORDERED_HASHMAP_FOREACH(of, j->files, i) {
- Object *oo;
- uint64_t op;
-
- if (of == j->unique_file)
- break;
-
- /* Skip this file it didn't have any fields
- * indexed */
- if (JOURNAL_HEADER_CONTAINS(of->header, n_fields) &&
- le64toh(of->header->n_fields) <= 0)
- continue;
-
- r = journal_file_find_data_object_with_hash(of, odata, ol, le64toh(o->data.hash), &oo, &op);
- if (r < 0)
- return r;
-
- if (r > 0)
- found = true;
- }
-
- if (found)
- continue;
-
- r = return_data(j, j->unique_file, o, data, l);
- if (r < 0)
- return r;
-
- return 1;
- }
-}
-
-_public_ void sd_journal_restart_unique(sd_journal *j) {
- if (!j)
- return;
-
- j->unique_file = NULL;
- j->unique_offset = 0;
- j->unique_file_lost = false;
-}
-
-_public_ int sd_journal_reliable_fd(sd_journal *j) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- return !j->on_network;
-}
-
-static char *lookup_field(const char *field, void *userdata) {
- sd_journal *j = userdata;
- const void *data;
- size_t size, d;
- int r;
-
- assert(field);
- assert(j);
-
- r = sd_journal_get_data(j, field, &data, &size);
- if (r < 0 ||
- size > REPLACE_VAR_MAX)
- return strdup(field);
-
- d = strlen(field) + 1;
-
- return strndup((const char*) data + d, size - d);
-}
-
-_public_ int sd_journal_get_catalog(sd_journal *j, char **ret) {
- const void *data;
- size_t size;
- sd_id128_t id;
- _cleanup_free_ char *text = NULL, *cid = NULL;
- char *t;
- int r;
-
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(ret, -EINVAL);
-
- r = sd_journal_get_data(j, "MESSAGE_ID", &data, &size);
- if (r < 0)
- return r;
-
- cid = strndup((const char*) data + 11, size - 11);
- if (!cid)
- return -ENOMEM;
-
- r = sd_id128_from_string(cid, &id);
- if (r < 0)
- return r;
-
- r = catalog_get(CATALOG_DATABASE, id, &text);
- if (r < 0)
- return r;
-
- t = replace_var(text, lookup_field, j);
- if (!t)
- return -ENOMEM;
-
- *ret = t;
- return 0;
-}
-
-_public_ int sd_journal_get_catalog_for_message_id(sd_id128_t id, char **ret) {
- assert_return(ret, -EINVAL);
-
- return catalog_get(CATALOG_DATABASE, id, ret);
-}
-
-_public_ int sd_journal_set_data_threshold(sd_journal *j, size_t sz) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
-
- j->data_threshold = sz;
- return 0;
-}
-
-_public_ int sd_journal_get_data_threshold(sd_journal *j, size_t *sz) {
- assert_return(j, -EINVAL);
- assert_return(!journal_pid_changed(j), -ECHILD);
- assert_return(sz, -EINVAL);
-
- *sz = j->data_threshold;
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff