SD_JOURNAL_HAS_RUNTIME_FILES(3)

  .SH "NAME" sd_journal_has_runtime_files, sd_journal_has_persistent_files - Query availability of runtime or persistent journal files.
  .SH "SYNOPSIS"

#include <systemd/sd-journal.h>

      .HP u int sd_journal_has_runtime_files(sd_journal *j);
      .HP u int sd_journal_has_persistent_files(sd_journal *j);

  .SH "DESCRIPTION"

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

  .SH "RETURN VALUE"

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

  .SH "NOTES"

    .PP All functions listed here are thread-agnostic and only a single thread may operate on a given sd_journal object.
    .PP These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.

  .SH "SEE ALSO"

    .PP sd-journal(3)