pam_chauthtok
sshpam_err = pam_chauthtok(sshpam_handle, PAM_CHANGE_EXPIRED_AUTHTOK);
result = pam_chauthtok(pamh, flags);
sshpam_err = pam_chauthtok(sshpam_handle,
pam_err = pam_chauthtok(pamh,
pam_err = pam_chauthtok(pamh, 0);
retcode = pam_chauthtok(pamh,