uuidgen(1) [osx man page]

UUIDGEN(1)						    BSD General Commands Manual 						UUIDGEN(1)

NAME

     uuidgen -- generates new UUID strings

SYNOPSIS

     uuidgen [-hdr]

DESCRIPTION

     The uuidgen command generates a Universally Unique IDentifier (UUID), a 128-bit value guaranteed to be unique over both space and time.

     The following options are available:

     -hdr      Emit CoreFoundation CFUUID-based source code for using the uuid in a header.

RETURN VALUE

     The UUID is printed to standard output as a hyphen-punctuated ASCII string of the form: EEF45689-BBE5-4FB6-9E80-41B78F6578E2 (in printf(3)
     format "%08X-%04X-%04X-%04X-%012X"), unless the -hdr option is given, in which case a fragment of source code is output.

Mac OS X							   July 1, 2005 							  Mac OS X

UUIDGEN(1)						      General Commands Manual							UUIDGEN(1)

NAME

       uuidgen - command-line utility to create a new UUID value

SYNOPSIS

       uuidgen [ -r | -t ]

DESCRIPTION

       The  uuidgen  program creates a new universally unique identifier (UUID) using the libuuid(3) library.  The new UUID can reasonably be con-
       sidered unique among all UUIDs created on the local system, and among UUIDs created on other systems in the past and in the future.

       There are two types of UUID's which uuidgen can generate: time-based UUID's and random-based UUID's.  By default uuidgen  will  generate  a
       random-based  UUID  if  a  high-quality random number generator is present.  Otherwise, it will chose a time-based UUID.  It is possible to
       force the generation of one of these two UUID types by using the -r or -t options.

OPTIONS

       -r     Generate a random-based UUID.  This method creates a UUID consisting mostly of random bits.  It requires that the  operating  system
	      have a high quality random number generator, such as /dev/random.

       -t     Generate	a  time-based  UUID.  This method creates a UUID based on the system clock plus the system's ethernet hardware address, if
	      present.

RETURN VALUE

       The UUID of the form 1b4e28ba-2fa1-11d2-883f-b9a761bde3fb (in printf(3) format "%08x-%04x-%04x-%04x-%012x") is output to the standard  out-
       put.

CONFORMING TO

       OSF DCE 1.1

AUTHOR

       uuidgen was written by Andreas Dilger for libuuid.

AVAILABILITY

       uuidgen is part of libuuid from the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.

SEE ALSO

       libuuid(3)

E2fsprogs version 1.32						   November 2002							UUIDGEN(1)