Method _solve_filename_conflicts

src/proxy/logging/LogObject.cc:982–1079

}

int
LogObjectManager::_solve_filename_conflicts(LogObject *log_object, int maxConflicts)
{
  int retVal = NO_FILENAME_CONFLICTS;

  const char *filename = log_object->get_full_filename();

  if (access(filename, F_OK)) {
    if (errno != ENOENT) {
      const char *msg = "Cannot access log file %s: %s";
      const char *se  = strerror(errno);

      Error(msg, filename, se);
      retVal = ERROR_ACCESSING_LOG_FILE;
    }
  } else {
    // file exists, try to read metafile to get object signature
    //
    uint64_t     signature = 0;
    BaseMetaInfo meta_info(filename);
    bool         conflicts = true;

    if (meta_info.file_open_successful()) {
      bool     got_sig = meta_info.get_log_object_signature(&signature);
      uint64_t obj_sig = log_object->get_signature();

      if (got_sig && signature == obj_sig) {
        conflicts = false;
      }
      Dbg(dbg_ctl_log,
          "LogObjectManager::_solve_filename_conflicts\n"
          "\tfilename = %s\n"
          "\tmeta file signature = %" PRIu64 "\n"
          "\tlog object signature = %" PRIu64 "\n"
          "\tconflicts = %d",
          filename, signature, obj_sig, conflicts);
    }

    if (conflicts) {
      if (maxConflicts == 0) {
        // do not take any action, and return an error status
        //
        const char *msg = "Cannot solve filename conflicts for log file %s";

        Error(msg, filename);
        retVal = CANNOT_SOLVE_FILENAME_CONFLICTS;
      } else {
        // Either the meta file could not be read, or the new object's
        // signature and the metafile signature do not match.
        // Roll the old filename so the new object can use the filename
        // it requested (previously we used to rename the NEW file
        // but now we roll the OLD file). However, if the log object writes to
        // a pipe don't roll because rolling is not applicable to pipes.

        bool roll_file = true;

        if (log_object->writes_to_pipe()) {
          // Verify whether the existing file is a pipe. If it is,