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protocols(5) [mojave man page]

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

Check Out this Related Man Page

SERVICES(5)						      BSD File Formats Manual						       SERVICES(5)

NAME
services -- service name data base DESCRIPTION
The services file contains information regarding the known services available in the DARPA Internet. For each service a single line should be present with the following information: official service name port number protocol name aliases Items are separated by any number of blanks and/or tab characters. The port number and protocol name are considered a single item; a ``/'' is used to separate the port and protocol (e.g. ``512/tcp''). A ``#'' indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Service names may contain any printable character other than a field delimiter, newline, or comment character. INTERACTION WITH DIRECTORY SERVICES
Processes generally find service records using one of the getservent(3) family of functions, or using getaddrinfo(3). On Mac OS X, these functions interact with the DirectoryService(8) daemon, which reads the /etc/services file as well as searching other directory information services to determine service name, protocol, and port information. FILES
/etc/services SEE ALSO
getservent(3), getaddrinfo(3), DirectoryService(8) HISTORY
The services file format appeared in 4.2BSD. 4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution

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