sd_journal_has_runtime_files, sd_journal_has_persistent_files — Query availability of runtime or persistent journal files
#include <systemd/sd-journal.h>
int sd_journal_has_runtime_files( | sd_journal *j); |
int sd_journal_has_persistent_files( | sd_journal *j); |
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.
Both sd_journal_has_runtime_files()
and sd_journal_has_persistent_files() return -EINVAL
if their argument is NULL.
All functions listed here are thread-agnostic and only a single thread may operate on a given object at any given time. Different threads may access the same object at different times. Multiple independent objects may be used from different threads in parallel.
Functions described here are available as a shared
library, which can be compiled against and linked to with the
libsystemd pkg-config(1)
file.
sd_journal_has_runtime_files() and
sd_journal_has_persistent_files() were added in version 229.