NAME

       sd_journal_has_runtime_files, sd_journal_has_persistent_files - Query availability of
       runtime or persistent journal files

SYNOPSIS

       #include <systemd/sd-journal.h>

       int sd_journal_has_runtime_files(sd_journal *j);

       int sd_journal_has_persistent_files(sd_journal *j);

DESCRIPTION

       sd_journal_has_runtime_files() returns a positive value if runtime journal files (present
       in /run/systemd/journal/) have been found. Otherwise returns 0.

       sd_journal_has_persistent_files() returns a positive value if persistent journal files
       (present in /var/log/journal/) have been found. Otherwise returns 0.

RETURN VALUE

       Both sd_journal_has_runtime_files() and sd_journal_has_persistent_files() return -EINVAL
       if their argument is NULL.

NOTES

       All functions listed here are 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.

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

HISTORY

       sd_journal_has_runtime_files() and sd_journal_has_persistent_files() were added in version
       229.

SEE ALSO

       sd-journal(3)