src/systemd/sd-journal.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef foojournalhfoo
   4 #define foojournalhfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2011 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 #include <inttypes.h>
  26 #include <sys/types.h>
  27 #include <stdarg.h>
  28 #include <sys/uio.h>
  29
  30 #include <systemd/sd-id128.h>
  31
  32 /* TODO:
  33  *
  34  *   - OR of matches is borked...
  35  *   - extend hash tables table as we go
  36  *   - accelerate looking for "all hostnames" and suchlike.
  37  *   - handle incomplete header
  38  *
  39  *   - kann NTP nicht finden?
  40  *
  41  *   - local deserializer
  42  *   - http server
  43  *   - message catalog
  44  *
  45  *   - check LE/BE conversion for 8bit, 16bit, 32bit values
  46  *   - cryptographic hash
  47  *   - think about manipulations of header
  48  *   - implement audit gateway
  49  *   - implement kernel gatway
  50  */
  51
  52 /* Write to daemon */
  53
  54 int sd_journal_print(int piority, const char *format, ...) __attribute__ ((format (printf, 2, 3)));
  55 int sd_journal_printv(int priority, const char *format, va_list ap);
  56
  57 int sd_journal_send(const char *format, ...) __attribute__((sentinel));
  58 int sd_journal_sendv(const struct iovec *iov, int n);
  59
  60 int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix);
  61
  62 /* Browse journal stream */
  63
  64 typedef struct sd_journal sd_journal;
  65
  66 enum {
  67         SD_JOURNAL_LOCAL_ONLY = 1,
  68         SD_JOURNAL_RUNTIME_ONLY = 2,
  69         SD_JOURNAL_SYSTEM_ONLY = 4
  70 };
  71
  72 int sd_journal_open(sd_journal **ret, int flags);
  73 void sd_journal_close(sd_journal *j);
  74
  75 int sd_journal_previous(sd_journal *j);
  76 int sd_journal_next(sd_journal *j);
  77
  78 int sd_journal_previous_skip(sd_journal *j, uint64_t skip);
  79 int sd_journal_next_skip(sd_journal *j, uint64_t skip);
  80
  81 int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret);
  82 int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id);
  83 int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *l);
  84 int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *l);
  85 void sd_journal_restart_data(sd_journal *j);
  86
  87 int sd_journal_add_match(sd_journal *j, const void *data, size_t size);
  88 void sd_journal_flush_matches(sd_journal *j);
  89
  90 int sd_journal_seek_head(sd_journal *j);
  91 int sd_journal_seek_tail(sd_journal *j);
  92 int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec);
  93 int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec);
  94 int sd_journal_seek_cursor(sd_journal *j, const char *cursor);
  95
  96 int sd_journal_get_cursor(sd_journal *j, char **cursor);
  97
  98 int sd_journal_query_unique(sd_journal *j, const char *field);      /* missing */
  99 int sd_journal_enumerate_unique(sd_journal *j, const void **data, size_t *l); /* missing */
 100 void sd_journal_restart_unique(sd_journal *j);                      /* missing */
 101
 102 enum {
 103         SD_JOURNAL_NOP,
 104         SD_JOURNAL_APPEND,
 105         SD_JOURNAL_INVALIDATE_ADD,
 106         SD_JOURNAL_INVALIDATE_REMOVE
 107 };
 108
 109 int sd_journal_get_fd(sd_journal *j);
 110 int sd_journal_process(sd_journal *j);
 111
 112 #define SD_JOURNAL_FOREACH(j)                                           \
 113         if (sd_journal_seek_head(j) >= 0)                               \
 114                 while (sd_journal_next(j) > 0)
 115
 116 #define SD_JOURNAL_FOREACH_BACKWARDS(j)                                 \
 117         if (sd_journal_seek_tail(j) >= 0)                               \
 118                 while (sd_journal_previous(j) > 0)
 119
 120 #define SD_JOURNAL_FOREACH_DATA(j, data, l)                             \
 121         for (sd_journal_restart_data(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )
 122
 123 #define SD_JOURNAL_FOREACH_UNIQUE(j, data, l)                           \
 124         for (sd_journal_restart_unique(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )
 125
 126 #endif