g_mediasize
offset = g_mediasize(fd) - g_sectorsize(fd);
mediasize = g_mediasize(provfd);
off_t g_mediasize(int);
mediasize = g_mediasize(f);
mediasize = g_mediasize(f);
o = g_mediasize(fd);
mediasize = g_mediasize(fd);
mediasize = g_mediasize(fd);
mediasize = g_mediasize(fd);
mediasize = g_mediasize(fd);
disk.mediasize = g_mediasize(disk.fd);