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   sd-journal    ( 3 )

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Имя (Name)

sd-journal - APIs for submitting and querying log entries to and
       from the journal

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Синопсис (Synopsis)

#include <systemd/sd-journal.h>

       pkg-config --cflags --libs libsystemd

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Описание (Description)

sd-journal.h provides APIs to submit and query log entries. The
       APIs exposed act both as client for the
       systemd-journald.service(8) journal service and as parser for the
       journal files on disk.

       See sd_journal_print(3), sd_journal_stream_fd(3),
       sd_journal_open(3), sd_journal_next(3),
       sd_journal_get_realtime_usec(3), sd_journal_add_match(3),
       sd_journal_seek_head(3), sd_journal_enumerate_fields(3),
       sd_journal_get_cursor(3), sd_journal_get_cutoff_realtime_usec(3),
       sd_journal_get_cutoff_monotonic_usec(3), sd_journal_get_usage(3),
       sd_journal_get_catalog(3), sd_journal_get_fd(3),
       sd_journal_has_runtime_files(3) and
       sd_journal_has_persistent_files(3) for more information about the
       functions implemented.

       Command line access for submitting entries to the journal is
       available with the systemd-cat(1) tool. Command line access for
       querying entries from the journal is available with the
       journalctl(1) tool.

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Безопасность потоков (Thread safety)

Functions that operate on sd_journal objects are thread agnostic
       — given sd_journal pointer may only be used from one specific
       thread at all times (and it has to be the very same one during
       the entire lifetime of the object), but multiple, independent
       threads may use multiple, independent objects safely. Other
       functions — those that are used to send entries to the journal,
       like sd_journal_print(3) and similar, or those that are used to
       retrieve global information like sd_journal_stream_fd(3) and
       sd_journal_get_catalog_for_message_id(3) — are fully thread-safe
       and may be called from multiple threads in parallel.

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Примечание (Note)

These APIs are implemented as a shared library, which can be
       compiled and linked to with the libsystemd pkg-config(1) file.

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Смотри также (See also)

systemd(1), sd_journal_print(3), sd_journal_stream_fd(3),
       sd_journal_open(3), sd_journal_next(3), sd_journal_get_data(3),
       sd_journal_get_realtime_usec(3), sd_journal_add_match(3),
       sd_journal_seek_head(3), sd_journal_enumerate_fields(3),
       sd_journal_get_cursor(3), sd_journal_get_cutoff_realtime_usec(3),
       sd_journal_get_cutoff_monotonic_usec(3), sd_journal_get_usage(3),
       sd_journal_get_fd(3), sd_journal_query_unique(3),
       sd_journal_get_catalog(3), sd_journal_has_runtime_files(3),
       sd_journal_has_persistent_files(3), journalctl(1), sd-id128(3),
       pkg-config(1)

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