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pkttyagent(1) [debian man page]

PKTTYAGENT(1)							    pkttyagent							     PKTTYAGENT(1)

pkttyagent - Textual authentication helper SYNOPSIS
pkttyagent [--version] [--help] pkttyagent [--process { pid | pid,pid-start-time } | --system-bus-name busname] [--notify-fd fd] [--fallback] DESCRIPTION
pkttyagent is used to start a textual authentication agent for the subject specified by either --process or --system-bus-name. If neither of these options are given, the parent process is used. To get notified when the authentication agent has been registered either listen to the Changed D-Bus signal or use --notify-fd to pass the number of a file descriptor that has been passed to the program. This file descriptor will then be closed when the authentication agent has been successfully registered. If --fallback is used, the textual authentication agent will not replace an existing authentication agent. RETURN VALUE
If the authentication agent could not be registered, pkttyagent exits with an exit code of 127. Diagnostic messages are printed on standard error. If one or more of the options passed are malformed, pkttyagent exits with an exit code of 126. If stdin is a tty, then this manual page is also shown. If the authentication agent was successfully registered, pkttyagent will keep running, interacting with the user as needed. When its services are no longer needed, the process can be killed. NOTES
Since process identifiers can be recycled, the caller should always use pid,pid-start-time when using the --process option. The value of pid-start-time can be determined by consulting e.g. the proc(5) file system depending on the operating system. If only pid is passed to the --process option, then pkttyagent will look up the start time itself but note that this may be racy. AUTHOR
Written by David Zeuthen with a lot of help from many others. BUGS
Please send bug reports to either the distribution or the polkit-devel mailing list, see the link on how to subscribe. SEE ALSO
polkit(8), pkaction(1), pkcheck(1), pkexec(1) polkit May 2009 PKTTYAGENT(1)

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ssh-agent(1)							   User Commands						      ssh-agent(1)

ssh-agent - authentication agent SYNOPSIS
ssh-agent [-a bind_address] [-c | -s ] [-d] [command [args]...] ssh-agent [-c | -s] -k DESCRIPTION
ssh-agent is a program to hold private keys used for public key authentication (RSA, DSA). ssh-agent is often started at the beginning of a login session. All other windows or programs are started as clients to the ssh-agent program. Through use of environment variables, the agent can be located and automatically used for authentication when logging in to other machines using ssh(1). See the System Administra- tion Guide: Security Services. If a command line is given, this is executed as a subprocess of the agent. When the command dies, so does the agent. The agent initially does not have any private keys. Keys are added using ssh-add(1), which sends the identity to the agent. Several identi- ties can be stored in the agent; the agent can automatically use any of these identities. Use the -l option in ssh-add(1) to display the identities currently held by the agent. The agent is run in the user's local host. Authentication data need not be stored on any other machine, and authentication passphrases never go over the network. However, if the connection to the agent is forwarded over SSH remote logins, the user can use the privileges given by the identities anywhere in the network in a secure way. There are two main ways to get an agent setup. Either you let the agent start a new subcommand into which some environment variables are exported, or you let the agent print the needed shell commands (either sh(1) or csh(1) syntax can be generated) which can be evalled in the calling shell. Later, use ssh(1) to look at these variables and use them to establish a connection to the agent. A unix-domain socket is created (/tmp/ssh-XXXXXXXX/ and the name of this socket is stored in the SSH_AUTH_SOCK environment vari- able. The socket is made accessible only to the current user. This method is easily abused by root or another instance of the same user. The SSH_AGENT_PID environment variable holds the agent's PID. The agent exits automatically when the command given on the command line terminates. OPTIONS
The following options are supported: -a bind_address Binds the agent to the unix-domain socket bind_address. The default is /tmp/ssh-XXXXXXXX/ -c Generates C-shell commands on stdout. This is the default if SHELL indicates that it is a csh style of shell. -d Debug mode. When this option is specified, ssh-agent will not fork. -k Kills the current agent (given by the SSH_AGENT_PID environment variable). -s Generates Bourne shell commands on stdout. This is the default if SHELL does not indicate that it is a csh style of shell. EXIT STATUS
The following exit values are returned: 0 Successful completion. 1 An error occurred. FILES
/tmp/ssh-XXXXXXXX/ Unix-domain sockets used to contain the connection to the authentication agent. These sockets should only be readable by the owner. The sockets are removed when the agent exits. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsshu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), attributes(5) System Administration Guide: Security Services SunOS 5.11 17 Nov 2008 ssh-agent(1)
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