int pam_chauthtok(pam_handle_t *pamh , int flags );
DESCRIPTION
pam_chauthtok
Use this function to rejuvenate the authentication tokens (passwords
etc.) of an applicant user.
Note, the application should not pre-authenticate the user, as this is
performed (if required) by the
Linux-PAM framework.
The
flags argument can
optionally take the value,
PAM_CHANGE_EXPIRED_AUTHTOK "." In such cases the framework is only required to update those
authentication tokens that have expired. Without this argument, the
framework will attempt to obtain new tokens for all configured
authentication mechanisms. The details of the types and number of such
schemes should not concern the calling application.
RETURN VALUE
A successful return from this function will be indicated with
PAM_SUCCESS "."
Specific errors of special interest when calling this function are
PAM_AUTHTOK_ERROR - a valid new token was not obtained
PAM_AUTHTOK_RECOVERY_ERR - old authentication token was not available
PAM_AUTHTOK_LOCK_BUSY - a resource needed to update the token was locked (try again later)
PAM_AUTHTOK_DISABLE_AGING - one or more of the authentication modules does not honor
authentication token aging
PAM_TRY_AGAIN - one or more authentication mechanism is not prepared to update a
token at this time
In general other return values may be returned. They should be treated
as indicating failure.
ERRORS
May be translated to text with
pam_strerror "(3). "
