Put ssh back into the repository
Change-Id: I23324372188fa6ed3f93a32b84365f5df6367590
diff --git a/ssh-add.1 b/ssh-add.1
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+.\" $OpenBSD: ssh-add.1,v 1.55 2010/10/28 18:33:28 jmc Exp $
+.\"
+.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
+.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+.\" All rights reserved
+.\"
+.\" As far as I am concerned, the code I have written for this software
+.\" can be used freely for any purpose. Any derived versions of this
+.\" software must be clearly marked as such, and if the derived work is
+.\" incompatible with the protocol description in the RFC file, it must be
+.\" called by a name other than "ssh" or "Secure Shell".
+.\"
+.\"
+.\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
+.\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
+.\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" 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.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd $Mdocdate: October 28 2010 $
+.Dt SSH-ADD 1
+.Os
+.Sh NAME
+.Nm ssh-add
+.Nd adds private key identities to the authentication agent
+.Sh SYNOPSIS
+.Nm ssh-add
+.Op Fl cDdLlXx
+.Op Fl t Ar life
+.Op Ar
+.Nm ssh-add
+.Fl s Ar pkcs11
+.Nm ssh-add
+.Fl e Ar pkcs11
+.Sh DESCRIPTION
+.Nm
+adds private key identities to the authentication agent,
+.Xr ssh-agent 1 .
+When run without arguments, it adds the files
+.Pa ~/.ssh/id_rsa ,
+.Pa ~/.ssh/id_dsa ,
+.Pa ~/.ssh/id_ecdsa
+and
+.Pa ~/.ssh/identity .
+After loading a private key,
+.Nm
+will try to load corresponding certificate information from the
+filename obtained by appending
+.Pa -cert.pub
+to the name of the private key file.
+Alternative file names can be given on the command line.
+.Pp
+If any file requires a passphrase,
+.Nm
+asks for the passphrase from the user.
+The passphrase is read from the user's tty.
+.Nm
+retries the last passphrase if multiple identity files are given.
+.Pp
+The authentication agent must be running and the
+.Ev SSH_AUTH_SOCK
+environment variable must contain the name of its socket for
+.Nm
+to work.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl c
+Indicates that added identities should be subject to confirmation before
+being used for authentication.
+Confirmation is performed by the
+.Ev SSH_ASKPASS
+program mentioned below.
+Successful confirmation is signaled by a zero exit status from the
+.Ev SSH_ASKPASS
+program, rather than text entered into the requester.
+.It Fl D
+Deletes all identities from the agent.
+.It Fl d
+Instead of adding identities, removes identities from the agent.
+If
+.Nm
+has been run without arguments, the keys for the default identities will
+be removed.
+Otherwise, the argument list will be interpreted as a list of paths to
+public key files and matching keys will be removed from the agent.
+If no public key is found at a given path,
+.Nm
+will append
+.Pa .pub
+and retry.
+.It Fl e Ar pkcs11
+Remove keys provided by the PKCS#11 shared library
+.Ar pkcs11 .
+.It Fl L
+Lists public key parameters of all identities currently represented
+by the agent.
+.It Fl l
+Lists fingerprints of all identities currently represented by the agent.
+.It Fl s Ar pkcs11
+Add keys provided by the PKCS#11 shared library
+.Ar pkcs11 .
+.It Fl t Ar life
+Set a maximum lifetime when adding identities to an agent.
+The lifetime may be specified in seconds or in a time format
+specified in
+.Xr sshd_config 5 .
+.It Fl X
+Unlock the agent.
+.It Fl x
+Lock the agent with a password.
+.El
+.Sh ENVIRONMENT
+.Bl -tag -width Ds
+.It Ev "DISPLAY" and "SSH_ASKPASS"
+If
+.Nm
+needs a passphrase, it will read the passphrase from the current
+terminal if it was run from a terminal.
+If
+.Nm
+does not have a terminal associated with it but
+.Ev DISPLAY
+and
+.Ev SSH_ASKPASS
+are set, it will execute the program specified by
+.Ev SSH_ASKPASS
+and open an X11 window to read the passphrase.
+This is particularly useful when calling
+.Nm
+from a
+.Pa .xsession
+or related script.
+(Note that on some machines it
+may be necessary to redirect the input from
+.Pa /dev/null
+to make this work.)
+.It Ev SSH_AUTH_SOCK
+Identifies the path of a
+.Ux Ns -domain
+socket used to communicate with the agent.
+.El
+.Sh FILES
+.Bl -tag -width Ds
+.It Pa ~/.ssh/identity
+Contains the protocol version 1 RSA authentication identity of the user.
+.It Pa ~/.ssh/id_dsa
+Contains the protocol version 2 DSA authentication identity of the user.
+.It Pa ~/.ssh/id_ecdsa
+Contains the protocol version 2 ECDSA authentication identity of the user.
+.It Pa ~/.ssh/id_rsa
+Contains the protocol version 2 RSA authentication identity of the user.
+.El
+.Pp
+Identity files should not be readable by anyone but the user.
+Note that
+.Nm
+ignores identity files if they are accessible by others.
+.Sh EXIT STATUS
+Exit status is 0 on success, 1 if the specified command fails,
+and 2 if
+.Nm
+is unable to contact the authentication agent.
+.Sh SEE ALSO
+.Xr ssh 1 ,
+.Xr ssh-agent 1 ,
+.Xr ssh-keygen 1 ,
+.Xr sshd 8
+.Sh AUTHORS
+OpenSSH is a derivative of the original and free
+ssh 1.2.12 release by Tatu Ylonen.
+Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
+Theo de Raadt and Dug Song
+removed many bugs, re-added newer features and
+created OpenSSH.
+Markus Friedl contributed the support for SSH
+protocol versions 1.5 and 2.0.