NAME

openpam_ttyconv — simple tty-based conversation function

LIBRARY

Pluggable Authentication Module Library (libpam, -lpam)

SYNOPSIS

#include <sys/types.h>
#include <security/pam_appl.h>
#include <security/openpam.h>

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.