December 21, 2007 OPENPAM_TTYCONV 3

### NAME

openpam_ttyconv - simple tty-based conversation function

### LIBRARY

### SYNOPSIS

```int` openpam_ttyconv(```int n``, const struct pam_message **msg``, struct pam_response **resp``, void *data`)

### DESCRIPTION

The openpam_ttyconv function is a standard conversation function suitable for use on TTY devices. It should be adequate for the needs of most text-based interactive programs.

The openpam_ttyconv function displays a prompt to, and reads in a password from /dev/tty. If this file is not accessible, openpam_ttyconv displays the prompt on the standard error output and reads from the standard input.

The openpam_ttyconv function allows the application to specify a timeout for user input by setting the global integer variable openpam_ttyconv_timeout to the length of the timeout in seconds.

### RETURN VALUES

The openpam_ttyconv function returns one of the following values:

[```PAM_BUF_ERR`]
  Memory buffer error.

[```PAM_CONV_ERR`]
  Conversation failure.

[```PAM_SYSTEM_ERR`]
  System error.

### SEE ALSO

getpass(3), openpam_nullconv(3), pam(3), pam_prompt(3), pam_strerror(3), pam_vprompt(3)

### STANDARDS

The openpam_ttyconv function is an OpenPAM extension.

### AUTHORS

The openpam_ttyconv function and this manual page were developed for the FreeBSD Project by ThinkSec AS and Network Associates Laboratories, the Security Research Division of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program.