fprintf(ofp, " set-session Set current session name\n");
fprintf(ofp, " snapshot Snapshot buffers of current session name\n");
fprintf(ofp, " start Start tracing\n");
fprintf(ofp, " set-session Set current session name\n");
fprintf(ofp, " snapshot Snapshot buffers of current session name\n");
fprintf(ofp, " start Start tracing\n");