outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bavail) / (double)buf.f_blocks, pct_mark);
walk += strlen("percentage_used_of_avail");
outwalk += sprintf(outwalk, "%.01f%s", 100.0 * (double)(buf.f_blocks - buf.f_bavail) / (double)buf.f_blocks, pct_mark);
walk += strlen("percentage_used_of_avail");