.\" Copyright (c) 2007 The DragonFly Project.  All rights reserved.
.\" 
.\" This code is derived from software contributed to The DragonFly Project
.\" by Matthew Dillon <dillon@backplane.com>
.\" 
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.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
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.\"    notice, this list of conditions and the following disclaimer in
.\"    the documentation and/or other materials provided with the
.\"    distribution.
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.\"    contributors may be used to endorse or promote products derived
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.\" 
.\" $DragonFly: src/sbin/hammer/hammer.8,v 1.1 2008/01/01 00:57:57 dillon Exp $
.Dd December 31, 2007
.Dt HAMMER 8
.Os
.Sh NAME
.Nm hammer
.Nd HAMMER file system utility
.Sh SYNOPSIS
.Nm
.Ar command
.Ar ...
.Sh DESCRIPTION
The
.Nm
utility provides miscellanious functions related to managing a HAMMER
filesystem.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl h
Get help
.El
.Pp
The commands are as follows:
.Bl -tag -width indent
.It Ar now
Generate a timestamp suitable for use in the @@ filename extension,
representing right now.
.It Ar stamp
Generate a timestamp suitable for use in the @@ filename extension.
A time specification of
.Pf yyyymmdd Oo :hhmmss Oc Ns Op .fractional
specifies an exact as-of timestamp in local (not UTC) time.
Set the TZ environment variable prior to running
.Nm
if you wish to specify the time by some other means.
.El
.Sh EXAMPLES
.Sh DIAGNOSTICS
Exit status is 0 on success and 1 on error.
.Sh SEE ALSO
.Xr newfs_hammer 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Dx 1.11 .
.Sh AUTHORS
.An Matthew Dillon Aq dillon@backplane.com