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sd_journal_get_usage(3) — Linux manual page

SD_JOURNAL_GET_USAGE(3)    sd_journal_get_usageSD_JOURNAL_GET_USAGE(3)

NAME        top

       sd_journal_get_usage - Journal disk usage

SYNOPSIS        top

#include <systemd/sd-journal.h>int sd_journal_get_usage(sd_journal *j, uint64_t *bytes);

DESCRIPTION        top

sd_journal_get_usage()determines the total disk space currently       used by journal files (in bytes). IfSD_JOURNAL_LOCAL_ONLYwas       passed when opening the journal, this value will only reflect the       size of journal files of the local host, otherwise of all hosts.

RETURN VALUE        top

sd_journal_get_usage()returns 0 on success or a negative       errno-style error code.

NOTES        top

       All functions listed here are 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.       Functions described here are available as a shared library, which       can be compiled against and linked to with thelibsystemd pkg-config(1) file.

HISTORY        top

sd_journal_get_usage()was added in version 190.

SEE ALSO        top

systemd(1),sd-journal(3),sd_journal_open(3)

COLOPHON        top

       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_USAGE(3)

Pages that refer to this page:sd-journal(3), systemd.directives(7), systemd.index(7)

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