c - Why is the maximal path length allowed for unix-sockets on linux 108? -


when creating unix socket, path name (man 7 unix) allowed maximally 108 chars long. friend caused bug in program because path longer. wonder how number determined.

i have suspicion number determined sizeof of struct sockaddr_un unambiguous compared sizeof of other sockaddresses sockaddr_in. if wanted avoid clashes other sizeof values, why not use prime number example? can please provide authorative source that?

it match space available in handy kernel data structure.

edit:

quoting "the design , implementation of 4.4bsd operating system" mckusick et. al. (page 369):

the memory management facilities revolve around data structure called mbuf. mbufs, or memory buffers, 128 bytes long, 100 or 108 bytes of space reserved data storage.


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