Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
dhcpinfo(1)			 User Commands			   dhcpinfo(1)

NAME
       dhcpinfo	- display values of parameters received	through	DHCP

SYNOPSIS
       dhcpinfo	[ -c ] [-i interface] [-n limit	] code

       dhcpinfo	[ -c ] [-i interface] [-n limit	] identifier

DESCRIPTION
       The dhcpinfo utility prints the DHCP-supplied value(s) of the parameter
       requested on the	command	line. The parameter may	be  identified	either
       by its numeric code in the DHCP specification, or by its	mnemonic iden-
       tifier, as listed in dhcp_inittab(4). This command is  intended	to  be
       used  in	command	substitutions in the shell scripts invoked by init(1M)
       at system boot. It first	contacts the DHCP client daemon	 dhcpagent(1M)
       to  verify that DHCP has	successfully completed on the requested	inter-
       face. If	DHCP has successfully completed	on  the	 requested  interface,
       dhcpinfo	 retrieves  the	 values	for the	requested parameter. Parameter
       values echoed by	dhcpinfo should	not be used without checking its  exit
       status. See EXIT	STATUS.

       See  dhcp_inittab(4)  for the list of mnemonic identifier codes for all
       DHCP parameters.	See RFC	2132, DHCP Options and BOOTP Vendor Extensions
       for more	detail.

   Output Format
       The  output  from dhcpinfo consists of one or more lines	of ASCII text;
       the format of the output	depends	upon the requested parameter. The num-
       ber  of	values	returned per line and the total	number of lines	output
       for a given parameter are determined by the parameter's granularity and
       maximum values, respectively, as	defined	by dhcp_inittab(4).

       The  format  of each individual value is	determined by the data type of
       the option, as determined by dhcp_inittab(4). The possible  data	 types
       and their formats are listed below:

       Data Type	 Format				 dhcp_inittab(4) type
       Unsigned	Number	 One or	more decimal digits	 UNUMBER8, UNUMBER16,
							 UNUMBER32, UNUMBER64
       Signed Number	 One or	more  decimal  digits,	 SNUMBER8, SNUMBER16,
			 optionally  preceded by a mi-	 SNUMBER32, SNUMBER64
			 nus sign
       IP Address	 Dotted-decimal	notation	 IP
       Octet		 The string "0x" followed by a	 OCTET
			 two-digit hexadecimal value
       String		 Zero or more ASCII characters	 ASCII

OPTIONS
       The following options are supported:

       -c    Displays the output in a canonical	format.	This format is identi-
	     cal to the	OCTET format with a granularity	of 1.

       -i interface
	     Specifies	the  interface	to retrieve values for DHCP parameters
	     from. If this option is not specified, the	primary	 interface  is
	     used.

       -n limit
	     Limits the	list of	values displayed to limit lines.

OPERANDS
       The following operands are supported:

	      code  Numeric  code for the requested DHCP parameter, as defined
		    by the DHCP	specification.	Vendor options are   specified
		    by adding 256 to the actual	vendor code.

	      identifier
		    Mnemonic  symbol  for  the	requested  DHCP	 parameter, as
		    listed in dhcp_inittab(4).

EXIT STATUS
       The following exit values are returned:

	      0	    Successful operation.

	      2	    The	operation was not successful. The DHCP	client	daemon
		    may	 not  be  running,  the	interface might	have failed to
		    configure, or no  satisfactory  DHCP  responses  were  re-
		    ceived.

	      3	    Bad	arguments.

	      4	    The	operation timed	out.

	      6	    Some system	error (should never occur).

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE	TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsr			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       dhcpagent(1M), ifconfig(1M), init(1M),dhcp_inittab(4),attributes(5)

       Alexander,  S.,	and  R.	Droms, RFC 2132, DHCP Options and BOOTP	Vendor
       Extensions,  Silicon Graphics, Inc., Bucknell University, March 1997.

SunOS 5.9			  29 Jul 1999			   dhcpinfo(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPERANDS | EXIT STATUS | ATTRIBUTES | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=dhcpinfo&sektion=1&manpath=SunOS+5.9>

home | help