Class stat

src/proxy/logging/LogObject.cc:1041–1041

          // Verify whether the existing file is a pipe. If it is,
          // disable the roll_file flag so we don't attempt rolling.
          struct stat s;
          if (stat(filename, &s) < 0) {
            const char *msg = "Cannot stat log file %s: %s";
            char       *se  = strerror(errno);