src/journal/sd-journal.h

	sd-journal.h revision de190aef08bb267b645205a747762df573b36834
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#ifndef foojournalhfoo
#define foojournalhfoo

/***
  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 General Public License as published by
  the Free Software Foundation; either version 2 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
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <inttypes.h>
#include <sys/types.h>

#include "sd-id128.h"

/* TODO:
 *
 *   - check LE/BE conversion for 8bit, 16bit, 32bit values
 *   - implement inotify usage on client
 *   - implement audit gateway
 *   - implement native gateway
 *   - implement stdout gateway
 *   - extend hash tables table as we go
 *   - accelerate looking for "all hostnames" and suchlike.
 *   - throttling
 *   - enforce limit on open journal files in journald and journalctl
 *   - cryptographic hash
 *   - fix space reservation logic
 *   - comm, argv can be manipulated, should it be _COMM=, _CMDLINE= or COMM=, CMDLINE=?
 */

typedef struct sd_journal sd_journal;

int sd_journal_open(sd_journal **ret);
void sd_journal_close(sd_journal *j);

int sd_journal_previous(sd_journal *j);
int sd_journal_next(sd_journal *j);

int sd_journal_previous_skip(sd_journal *j, uint64_t skip);
int sd_journal_next_skip(sd_journal *j, uint64_t skip);

int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret);
int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id);
int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *l);
int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *l);
void sd_journal_restart_data(sd_journal *j);

int sd_journal_add_match(sd_journal *j, const void *data, size_t size);
void sd_journal_flush_matches(sd_journal *j);

int sd_journal_seek_head(sd_journal *j);
int sd_journal_seek_tail(sd_journal *j);
int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec);
int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec);
int sd_journal_seek_cursor(sd_journal *j, const char *cursor);

int sd_journal_get_cursor(sd_journal *j, char **cursor);

int sd_journal_query_unique(sd_journal *j, const char *field);      /* missing */
int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l); /* missing */
void sd_journal_restart_unique(sd_journal *j);                      /* missing */

enum {
        SD_JOURNAL_NOP,
        SD_JOURNAL_APPEND,
        SD_JOURNAL_INVALIDATE_ADD,
        SD_JOURNAL_INVALIDATE_REMOVE
};

int sd_journal_get_fd(sd_journal *j);                              /* missing */
int sd_journal_process(sd_journal *j);                             /* missing */

#define SD_JOURNAL_FOREACH(j)                                           \
        if (sd_journal_seek_head(j) >= 0)                               \
                while (sd_journal_next(j) > 0)                          \

#define SD_JOURNAL_FOREACH_BACKWARDS(j)                                 \
        if (sd_journal_seek_tail(j) >= 0)                               \
                while (sd_journal_previous(j) > 0)                      \

#define SD_JOURNAL_FOREACH_DATA(j, data, l)                             \
        for (sd_journal_restart_data(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )

#define SD_JOURNAL_FOREACH_UNIQUE(j, data, l)                           \
        for (sd_journal_restart_unique(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )

#endif