All symbols starting with `n' in bsd/ufs/ffs

• nextgennumber bsd/ufs/ffs/ffs_alloc.c:83
• NINDIR bsd/ufs/ffs/fs.h:522
• NSPB bsd/ufs/ffs/fs.h:510
• NSPF bsd/ufs/ffs/fs.h:511
• NULL bsd/ufs/ffs/ffs_vnops.c:144
• numfrags bsd/ufs/ffs/fs.h:471