4.4BSD/usr/share/man/cat5/protocols.0

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PROTOCOLS(5)                BSD Programmer's Manual               PROTOCOLS(5)

NNAAMMEE
     pprroottooccoollss - protocol name data base

DDEESSCCRRIIPPTTIIOONN
     The pprroottooccoollss file contains information regarding the known protocols
     used in the DARPA Internet.  For each protocol a single line should be
     present with the following information:

           official protocol name
           protocol number
           aliases

     Items are separated by any number of blanks and/or tab characters.  A
     ``#'' indicates the beginning of a comment; characters up to the end of
     the line are not interpreted by routines which search the file.

     Protocol names may contain any printable character other than a field de-
     limiter, newline, or comment character.

FFIILLEESS
     /etc/protocols  The pprroottooccoollss file resides in _/_e_t_c.

SSEEEE AALLSSOO
     getprotoent(3)

BBUUGGSS
     A name server should be used instead of a static file.

HHIISSTTOORRYY
     The pprroottooccoollss file format appeared in 4.2BSD.

4.2 Berkeley Distribution        June 5, 1993                                1