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

FreeBSD Manual Pages

  
 
  

home | help
UUID(1)			 Universally Unique Identifier		       UUID(1)

NAME
       OSSP uuid - Universally Unique Identifier Command-Line Tool

VERSION
       OSSP uuid 1.6.2 (04-Jul-2008)

SYNOPSIS
       uuid [-v	version] [-m] [-n count] [-1] [-F format] [-o filename]
       [namespace name]

       uuid -d [-r] [-o	filename] uuid

DESCRIPTION
       OSSP uuid is a ISO-C:1999 application programming interface (API) and
       corresponding command line interface (CLI) for the generation of	DCE
       1.1, ISO/IEC 11578:1996 and IETF	RFC-4122 compliant Universally Unique
       Identifier (UUID). It supports DCE 1.1 variant UUIDs of version 1 (time
       and node	based),	version	3 (name	based, MD5), version 4 (random number
       based) and version 5 (name based, SHA-1). Additional API	bindings are
       provided	for the	languages ISO-C++:1998,	Perl:5 and PHP:4/5. Optional
       backward	compatibility exists for the ISO-C DCE-1.1 and Perl Data::UUID
       APIs.

       UUIDs are 128 bit numbers which are intended to have a high likelihood
       of uniqueness over space	and time and are computationally difficult to
       guess. They are globally	unique identifiers which can be	locally
       generated without contacting a global registration authority. UUIDs are
       intended	as unique identifiers for both mass tagging objects with an
       extremely short lifetime	and to reliably	identifying very persistent
       objects across a	network.

       This is the command line	interface (CLI)	of OSSP	uuid. For a detailed
       description of UUIDs see	the documentation of the application
       programming interface (API) in uuid(3).

OPTIONS
       -v version
	  Sets the version of the generated DCE	1.1 variant UUID. Supported
	  are version "1", "3",	"4" and	"5". The default is "1".

	  For version 3	and version 5 UUIDs the	additional command line
	  arguments namespace and name have to be given. The namespace is
	  either a UUID	in string representation or an identifier for
	  internally pre-defined namespace UUIDs (currently known are
	  "ns:DNS", "ns:URL", "ns:OID",	and "ns:X500").	The name is a string
	  of arbitrary length.

       -m Forces the use of a random multi-cast	MAC address when generating
	  version 1 UUIDs. By default the real physical	MAC address of the
	  system is used.

       -n count
	  Generate count UUIDs instead of just a single	one (the default).

       -1 If option -n is used with a count greater than 1, then this option
	  can enforce the reset	the UUID context for each generated UUID.
	  This makes no	difference for version 3, 4 and	5 UUIDs. But version 1
	  UUIDs	are based on the previously generated UUID which is remembered
	  in the UUID context of the API. Option -1 deletes the	remembered
	  UUID on each iteration.

       -F format
	  Representation format	for importing or exporting an UUID. The
	  following (case insensitive) format identifiers are currently
	  recognized:

	  BIN (binary representation)
	      This is the raw 128 bit network byte order binary	representation
	      of a UUID. Example is the	octet stream 0xF8 0x1D 0x4F 0xAE 0x7D
	      0xEC 0x11	0xD0 0xA7 0x65 0x00 0xA0 0xC9 0x1E 0x6B	0xF6.

	  STR (string representation)
	      This is the 36 character hexadecimal ASCII string	representation
	      of a UUID. Example is the	string
	      "f81d4fae-7dec-11d0-a765-00a0c91e6bf6".

	  SIV (single integer value representation)
	      This is the maximum 39 character long single integer value
	      representation of	a UUID.	Example	is the string
	      "329800735698586629295641978511506172918".

       -o filename
	  Write	output to filename instead of to stdout.

       -d Decode a given UUID (given as	a command line argument	or if the
	  command line argument	is "-" the UUID	is read	from stdin) and	dump
	  textual information about the	UUID.

EXAMPLES
	# generate DCE 1.1 v1 UUID (time and node based)
	$ uuid -v1
	01c47915-4777-11d8-bc70-0090272ff725

	# decode and dump DCE 1.1 v1 UUID (time	and node based)
	$ uuid -d 01c47915-4777-11d8-bc70-0090272ff725
	encode:	STR:	 01c47915-4777-11d8-bc70-0090272ff725
		SIV:	 2349374037528578887923094374772111141
	decode:	variant: DCE 1.1, ISO/IEC 11578:1996
		version: 1 (time and node based)
		content: time:	2004-01-15 16:22:26.376322.1 UTC
			 clock:	15472 (usually random)
			 node:	00:90:27:2f:f7:25 (global unicast)

	# generate DCE 1.1 v3 UUID (name based)
	$ uuid -v3 ns:URL http://www.ossp.org/
	02d9e6d5-9467-382e-8f9b-9300a64ac3cd

	# decode and dump DCE 1.1 v3 UUID (name	based)
	$ uuid -d 02d9e6d5-9467-382e-8f9b-9300a64ac3cd
	encode:	STR:	 02d9e6d5-9467-382e-8f9b-9300a64ac3cd
		SIV:	 3789866285607910888100818383505376205
	decode:	variant: DCE 1.1, ISO/IEC 11578:1996
		version: 3 (name based,	MD5)
		content: 02:D9:E6:D5:94:67:08:2E:0F:9B:93:00:A6:4A:C3:CD
			 (not decipherable: MD5	message	digest only)

	# generate DCE 1.1 v4 UUID 4 (random data based)
	$ uuid -v4
	eb424026-6f54-4ef8-a4d0-bb658a1fc6cf

	# decode and dump DCE 1.1 v4 UUID 4 (random data based)
	$ uuid -d eb424026-6f54-4ef8-a4d0-bb658a1fc6cf
	encode:	STR:	 eb424026-6f54-4ef8-a4d0-bb658a1fc6cf
		SIV:	 312712571721458096795100956955942831823
	decode:	variant: DCE 1.1, ISO/IEC 11578:1996
		version: 4 (random data	based)
		content: EB:42:40:26:6F:54:0E:F8:24:D0:BB:65:8A:1F:C6:CF
			 (no semantics:	random data only)

SEE ALSO
       uuid(3),	OSSP::uuid(3).

04-Jul-2008			OSSP uuid 1.6.2			       UUID(1)

NAME | VERSION | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=uuid&manpath=FreeBSD+12.0-RELEASE+and+Ports>

home | help