PAM_VPROMPT(3)          NetBSD Library Functions Manual         PAM_VPROMPT(3)

NAME
     pam_vprompt -- call the conversation function

LIBRARY
     Pluggable Authentication Module Library (libpam, -lpam)

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

     int
     pam_vprompt(const pam_handle_t *pamh, int style, char **resp,
         const char *fmt, va_list ap);

DESCRIPTION
     The pam_vprompt function constructs a string from the fmt and ap argu-
     ments using vsnprintf(3), and passes it to the given PAM context's con-
     versation function.

     The style argument specifies the type of interaction requested, and must
     be one of the following:

     PAM_PROMPT_ECHO_OFF
                         Display the message and obtain the user's response
                         without displaying it.

     PAM_PROMPT_ECHO_ON  Display the message and obtain the user's response.

     PAM_ERROR_MSG       Display the message as an error message, and do not
                         wait for a response.

     PAM_TEXT_INFO       Display the message as an informational message, and
                         do not wait for a response.

     A pointer to the response, or NULL if the conversation function did not
     return one, is stored in the location pointed to by the resp argument.

     The message and response should not exceed PAM_MAX_MSG_SIZE or
     PAM_MAX_RESP_SIZE, respectively.  If they do, they may be truncated.

RETURN VALUES
     The pam_vprompt 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
     pam(3), pam_error(3), pam_info(3), pam_prompt(3), pam_strerror(3),
     pam_verror(3), pam_vinfo(3), vsnprintf(3)

STANDARDS
     The pam_vprompt function is an OpenPAM extension.

AUTHORS
     The pam_vprompt 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.

NetBSD 5.0.1                   December 21, 2007                  NetBSD 5.0.1

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