.\"	$OpenBSD: co.1,v 1.28 2007/05/31 19:20:14 jmc Exp $
.\"
.\" Copyright (c) 2005 Xavier Santolaria <xsa@openbsd.org>
.\" All rights reserved.
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.Dd $Mdocdate: May 31 2007 $
.Dt CO 1
.Os
.Sh NAME
.Nm co
.Nd check out RCS revisions
.Sh SYNOPSIS
.Nm
.Bk -words
.Op Fl TV
.Op Fl d Ns Ar date
.Op Fl f Ns Op Ar rev
.Op Fl I Ns Op Ar rev
.Op Fl k Ns Ar mode
.Op Fl l Ns Op Ar rev
.Op Fl M Ns Op Ar rev
.Op Fl p Ns Op Ar rev
.Op Fl q Ns Op Ar rev
.Op Fl r Ns Op Ar rev
.Op Fl s Ns Ar state
.Op Fl u Ns Op Ar rev
.Op Fl w Ns Op Ar user
.Op Fl x Ns Ar suffixes
.Op Fl z Ns Ar tz
.Ar
.Ek
.Sh DESCRIPTION
The
.Nm
program is used to check out revisions from RCS files.
.Pp
When a file is checked out,
a copy is taken from the RCS repository,
minus its RCS information,
and placed in the current working directory.
Files may be checked out as the most recent revision
or according to a specific revision,
using the
.Fl r
option.
.Pp
Files are checked out in one of two possible modes:
unlocked (the default) or locked (using the
.Fl l
option).
In unlocked mode, any user may check out the file for reading.
If changes are to be made to a file though,
it will have to be locked using the
.Fl l
option.
During this time,
no other users may check out the file whilst it is locked.
.Pp
.Nm
also supports
keyword substitution \(en
see the
.Xr rcs 1
man page for more information.
.Pp
The following options are supported:
.Bl -tag -width Ds
.It Fl d Ns Ar date
Retrieve revision as of the latest revision no later than
.Ar date .
.It Fl f Ns Op Ar rev
Force the overwriting of the working file.
.It Fl I Ns Op Ar rev
Interactive mode.
.It Fl k Ns Ar mode
Specify the keyword substitution mode.
.It Fl l Ns Op Ar rev
The same as
.Fl r ,
but also locks the revision.
.It Fl M Ns Op Ar rev
Set the modification time of the file to the date of the
retrieved revision.
.It Fl p Ns Op Ar rev
Print the latest revision no later than
.Ar rev
to standard output.
.It Fl q Ns Op Ar rev
Be quiet about reporting.
.It Fl r Ns Op Ar rev
Retrieve the latest revision no later than
.Ar rev .
.It Fl s Ns Ar state
Retrieve revision of the specified
.Ar state
only.
.It Fl T
Preserve the modification time of RCS files.
.It Fl u Ns Op Ar rev
The same as
.Fl r ,
but also unlocks the retrieved revision if it was locked.
.It Fl V
Print RCS's version number.
.It Fl w Ns Op Ar user
Retrieve the latest revision which was checked in by the specified
.Ar user .
If the
.Ar user
argument is omitted, the login of the user issuing the command
is assumed.
.It Fl x Ns Ar suffixes
Specifies the suffixes for RCS files.
Suffixes should be separated by the
.Sq /
character.
.It Fl z Ns Ar tz
Specify the date output format in keyword substitution, and the
default time zone for
.Ar date
used in the
.Fl d
option.
.El
.Pp
.Ex -std co
.Sh ENVIRONMENT
.Bl -tag -width RCSINIT
.It Ev RCSINIT
If set, this variable should contain a list of space-delimited options that
are prepended to the argument list.
.El
.Sh EXAMPLES
Retrieve the latest revision of file
.Pa foo.c
and lock it for further editing:
.Pp
.Dl $ co -l foo.c
.Pp
Retrieve revision 1.5 of file
.Pa foo.c :
.Pp
.Dl $ co -r1.5 foo.c
.Sh SEE ALSO
.Xr ci 1 ,
.Xr ident 1 ,
.Xr rcs 1 ,
.Xr rcsclean 1 ,
.Xr rcsdiff 1 ,
.Xr rcsmerge 1 ,
.Xr rlog 1