A/UX 3.0 is based on System V Release 2, Version 2 version of UNIX. File names can be up to 255 characters in length.
POSIX, on the other hand, defines file name length in the constant MAXNAMLEN in the "/usr/include/dirent.h" header file. A/UX is certified by the National Institute of Standards and Technology as compliant with FIPS #151 (IEEE POSIX 1003.1-1990, and ISO 9945-1)
The BSD 4.3 maximum file name length is 255 characters. However, the implementation of file system between the BSD UNIX and the System V UNIX is completely different.
The BSD fast file system for A/UX was been requested and has been implemented in A/UX.
Article Change History:
19 Aug 1994 - Updated for A/UX 3.0
27 Aug 1992 - REVIEWED For technical accuracy.