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NAME |SYNOPSIS |DESCRIPTION |RETURN VALUE |NOTES |HISTORY |SEE ALSO |NOTES |COLOPHON | |
SD_JOURNAL_GET_CATALOG(3) sd_journal_get_catalogSD_JOURNAL_GET_CATALOG(3)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_tid,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, in the current journal entry, the "@" will be removed, but the field name otherwise left untouched.sd_journal_get_catalog_for_message_id()works similar tosd_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 theJournal Message Catalogs[1] documentation page.
sd_journal_get_catalog()andsd_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 withfree(3).
Functionsd_journal_get_catalog()is thread-agnostic and only a single specific thread may operate on a given object during its entire lifetime. It is safe to allocate multiple independent objects and use each from a specific thread in parallel. However, it is 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 do not operate on it at the very same time. Functionsd_journal_get_catalog_for_message_id()is are thread-safe and may be called in parallel from multiple threads. Functions described here are available as a shared library, which can be compiled against and linked to with thelibsystemd pkg-config(1) file.
sd_journal_get_catalog()andsd_journal_get_catalog_for_message_id()were added in version 196.
systemd(1),systemd.journal-fields(7),sd-journal(3),sd_journal_open(3),sd_journal_next(3),sd_journal_get_data(3),malloc(3)
1. Journal Message Catalogshttps://systemd.io/CATALOG
This page is part of thesystemd (systemd system and service manager) project. Information about the project can be found at ⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug report for this manual page, see ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/systemd/systemd.git⟩ on 2025-08-11. (At that time, the date of the most recent commit that was found in the repository was 2025-08-11.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which isnot part of the original manual page), send a mail to man-pages@man7.orgsystemd 258~rc2SD_JOURNAL_GET_CATALOG(3)Pages that refer to this page:sd-journal(3), systemd.directives(7), systemd.index(7)
HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. | |