sd_journal_get_catalog, sd_journal_get_catalog_for_message_id — Retrieve message catalog entry
#include <systemd/sd-journal.h>
| int sd_journal_get_catalog( | sd_journal* j, | 
| char** ret ); | 
| int sd_journal_get_catalog_for_message_id( | sd_id128_t id, | 
| char** ret ); | 
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 it the current
                journal entry the "@" will be removed but the field
                name otherwise left untouched.
sd_journal_get_catalog_for_message_id()
                works similar to
                sd_journal_get_catalog() but the
                entry is looked up by the specified message ID (no
                open journal context is necessary for this), and no
                field substitution is performed.
For more information about the journal message catalog please refer to the Journal Message Catalogs documentation page.
sd_journal_get_catalog()
                and
                sd_journal_get_catalog_for_message_id()
                return 0 on success or a negative errno-style error
                code. If no matching message catalog entry is found
                -ENOENT is returned.
On successful return, ret
                points to a new string, which must be freed with
                free(3).
                
The sd_journal_get_catalog() and
                sd_journal_get_catalog_for_message_id()
                interfaces are available as shared library, which can
                be compiled and linked to with the
                libsystemd-journal
                pkg-config(1)
                file.