centos man page for sd_journal_get_usage

SD_JOURNAL_GET_USAGE(3) 				       sd_journal_get_usage					   SD_JOURNAL_GET_USAGE(3)

NAME
       sd_journal_get_usage - Journal disk usage

SYNOPSIS
       #include <systemd/sd-journal.h>

       int sd_journal_get_usage(sd_journal* j, uint64_t* bytes);

DESCRIPTION
       sd_journal_get_usage() determines the total disk space currently used by journal files (in bytes). If SD_JOURNAL_LOCAL_ONLY was 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
       sd_journal_get_usage() returns 0 on success or a negative errno-style error code.

NOTES
       The sd_journal_get_usage() interface is available as a shared library, which can be compiled and linked to with the libsystemd-journal pkg-
       config(1) file.

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

systemd 208														   SD_JOURNAL_GET_USAGE(3)