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protocols(5)                BSD File Formats Manual               protocols(5)


NAME

     protocols -- protocol name data base


DESCRIPTION

     The protocols 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
     delimiter, newline, or comment character.


INTERACTION WITH DIRECTORY SERVICES

     Processes generally find protocol records using one of the getprotoent(3)
     family of functions.  On Mac OS X, these functions interact with the
     DirectoryService(8) daemon, which reads the /etc/protocols file as well
     as searching other directory information services to determine protocol
     name and number information.


FILES

     /etc/protocols


SEE ALSO

     getprotoent(3), DirectoryService(8)


HISTORY

     The protocols file format appeared in 4.2BSD.

4.2 Berkeley Distribution        June 5, 1993        4.2 Berkeley Distribution

Mac OS X 10.8 - Generated Sat Sep 1 14:42:18 CDT 2012
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