iscan: fix the test program iscan so it builds again

[tools/e2fsprogs.git] / misc / uuidgen.1.in

diff --git a/misc/uuidgen.1.in b/misc/uuidgen.1.in
index 049b663..cb8b3a8 100644 (file)
--- a/misc/uuidgen.1.in
+++ b/misc/uuidgen.1.in
@@ -1,29 +1,55 @@
 .\" Copyright 1999 Andreas Dilger (adilger@enel.ucalgary.ca)
 .\"
 .\" This man page was created for libuuid.so.1.1 from e2fsprogs-1.14.
-.\" 
+.\"
 .\" This file may be copied under the terms of the GNU Public License.
-.\" 
+.\"
 .\" Created  Wed Mar 10 17:42:12 1999, Andreas Dilger
 .TH UUIDGEN 1 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
 .SH NAME
 uuidgen \- command\-line utility to create a new UUID value
 .SH SYNOPSIS
-.nf
 .B uuidgen
-.fi
+[
+.B \-r
+|
+.B \-t
+]
 .SH DESCRIPTION
 The
 .B uuidgen
-program creates a new universally unique identifier (UUID) using the
-.BR libuuid "(3) functions " uuid_generate "(3) and " uuid_unparse "(3)."
-The new UUID can reasonably be considered unique among all UUIDs created
-on the local system, and among UUIDs created on other systems in the past
+program creates (and prints)
+a new universally unique identifier (UUID) using the
+.BR libuuid (3)
+library.  The new UUID can reasonably be considered unique among
+all UUIDs created on the local system,
+and among UUIDs created on other systems in the past
 and in the future.
-.SH RETURN VALUE
-The UUID of the form 1b4e28ba\-2fa1\-11d2\-883f\-b9a761bde3fb (in
-.BR printf (3)
-format "%08x\-%04x\-%04x\-%04x\-%012x") is output to the standard output.
+.PP
+There are two types of UUID's which
+.B uuidgen
+can generate: time-based UUID's and random-based UUID's.  By
+default
+.B 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
+.B \-r
+or
+.B \-t
+options.
+.SH OPTIONS
+.TP
+.B \-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
+.IR /dev/random .
+.TP
+.B \-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.
 .SH "CONFORMING TO"
 OSF DCE 1.1
 .SH AUTHOR
@@ -31,7 +57,7 @@ OSF DCE 1.1
 was written by Andreas Dilger for libuuid.
 .SH AVAILABILITY
 .B uuidgen
-is part of libuuid from the e2fsprogs package and is available for anonymous
-ftp from tsx\-11.mit.edu (and its mirrors) in /pub/linux/packages/ext2fs.
+is part of libuuid from the e2fsprogs package and is available from
+http://e2fsprogs.sourceforge.net.
 .SH "SEE ALSO"
 .BR libuuid (3)