5302ebe15f
This allows the caller to explicitly specify which journal files should be opened. The same functionality could be achieved before by creating a directory and playing around with symlinks. It is useful to debug stuff and explore the journal, and has been requested before. Waiting is supported, the journal will notice modifications on the files supplied when opening the journal, but will not add any new files.
146 lines
3.3 KiB
C
146 lines
3.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/types.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <systemd/sd-id128.h>
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#include "journal-def.h"
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#include "list.h"
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#include "hashmap.h"
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#include "set.h"
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#include "journal-file.h"
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typedef struct Match Match;
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typedef struct Location Location;
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typedef struct Directory Directory;
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typedef enum MatchType {
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MATCH_DISCRETE,
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MATCH_OR_TERM,
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MATCH_AND_TERM
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} MatchType;
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struct Match {
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MatchType type;
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Match *parent;
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LIST_FIELDS(Match, matches);
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/* For concrete matches */
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char *data;
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size_t size;
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le64_t le_hash;
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/* For terms */
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LIST_HEAD(Match, matches);
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};
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typedef enum LocationType {
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/* The first and last entries, resp. */
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LOCATION_HEAD,
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LOCATION_TAIL,
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/* We already read the entry we currently point to, and the
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* next one to read should probably not be this one again. */
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LOCATION_DISCRETE,
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/* We should seek to the precise location specified, and
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* return it, as we haven't read it yet. */
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LOCATION_SEEK
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} LocationType;
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struct Location {
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LocationType type;
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bool seqnum_set;
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bool realtime_set;
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bool monotonic_set;
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bool xor_hash_set;
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uint64_t seqnum;
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sd_id128_t seqnum_id;
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uint64_t realtime;
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uint64_t monotonic;
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sd_id128_t boot_id;
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uint64_t xor_hash;
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};
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struct Directory {
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char *path;
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int wd;
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bool is_root;
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};
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struct sd_journal {
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int flags;
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char *path;
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Hashmap *files;
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MMapCache *mmap;
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Location current_location;
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JournalFile *current_file;
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uint64_t current_field;
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Hashmap *directories_by_path;
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Hashmap *directories_by_wd;
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int inotify_fd;
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Match *level0, *level1, *level2;
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unsigned current_invalidate_counter, last_invalidate_counter;
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char *unique_field;
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JournalFile *unique_file;
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uint64_t unique_offset;
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bool on_network;
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bool no_new_files;
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size_t data_threshold;
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Set *errors;
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usec_t last_process_usec;
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};
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char *journal_make_match_string(sd_journal *j);
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void journal_print_header(sd_journal *j);
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static inline void journal_closep(sd_journal **j) {
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sd_journal_close(*j);
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}
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#define _cleanup_journal_close_ _cleanup_(journal_closep)
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#define JOURNAL_FOREACH_DATA_RETVAL(j, data, l, retval) \
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for (sd_journal_restart_data(j); ((retval) = sd_journal_enumerate_data((j), &(data), &(l))) > 0; )
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