services(4) services(4)
NAME [Toc] [Back]
services - service name data base
DESCRIPTION [Toc] [Back]
The file /etc/services associates official service names and aliases
with the port number and protocol the services use. For each service
a single line should be present with the following information:
<official service name> <port number/protocol name> <aliases>
Port numbers 0 through 1023 are assigned by RFC 1700. This RFC also
lists the conventional use of various ports with numbers greater than
1023.
Aliases are other names under which a service is known. Library
routines such as getservbyname() can be invoked with a service alias
instead of the service official name. For example:
shell 514/tcp cmd
In this example, getservbyname() can be invoked with cmd instead of
shell:
sp = getservbyname("cmd", "tcp");
instead of
sp = getservbyname("shell", "tcp");
Both produce the same results.
A line cannot start with a space or tab. Items are separated by any
number of blanks (space or tab characters in any combination). The
port number and protocol name are considered a single item. A / is
used to separate the port and protocol (for example, 512/tcp). A #
character indicates the beginning of a comment. Characters from the #
to the end of the line are not interpreted by routines which search
the file.
Service names can contain any printable character other than a white
space, newline, or comment character. Trailing blanks (spaces or
tabs) are allowed at the end of a line.
Not all services listed in this file are available on HP-UX.
EXAMPLES [Toc] [Back]
shell 514/tcp cmd
telnet 23/tcp
login 513/tcp
Hewlett-Packard Company - 1 - HP-UX 11i Version 2: August 2003
services(4) services(4)
AUTHOR [Toc] [Back]
services was developed by the University of California, Berkeley.
FILES [Toc] [Back]
/etc/services
SEE ALSO [Toc] [Back]
getservent(3N).
Hewlett-Packard Company - 2 - HP-UX 11i Version 2: August 2003 [ Back ] |
