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 sd_journal object. Functions listed here are available as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.
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Pages that refer to this page: sd-journal(3), systemd.directives(7), systemd.index(7)