sd_journal_get_catalog, sd_journal_get_catalog_for_message_id — Retrieve message catalog entry
sd_journal_get_catalog() retrieves a
message catalog entry for the current journal entry. This will
look up an entry in the message catalog by using the
MESSAGE_ID=" field of the current journal entry.
Before returning the entry all journal field names in the catalog
entry text enclosed in "@" will be replaced by the respective
field values of the current entry. If a field name referenced in
the message catalog entry does not exist, in the current journal
entry, the "@" will be removed, but the field name otherwise left
works similar to
the entry is looked up by the specified message ID (no open
journal context is necessary for this), and no field substitution
For more information about the journal message catalog please refer to the Journal Message Catalogs documentation page.
return 0 on success or a negative errno-style error code. If no
matching message catalog entry is found, -ENOENT is
On successful return,
ret points to a
new string, which must be freed with
sd_journal_get_catalog() is thread-agnostic and only
a single specific thread may operate on a given object during its entire lifetime. It's safe to allocate multiple
independent objects and use each from a specific thread in parallel. However, it's not safe to allocate such an
object in one thread, and operate or free it from any other, even if locking is used to ensure these threads don't
operate on it at the very same time.
sd_journal_get_catalog_for_message_id() is are thread-safe and may be called in
parallel from multiple threads.
These APIs are implemented as a shared
library, which can be compiled and linked to with the