pam_debug.so  [
	auth=value
      ] [
	cred=value
      ] [
	acct=value
      ] [
	prechauthtok=value
      ] [
	chauthtok=value
      ] [
	auth=value
      ] [
	open_session=value
      ] [
	close_session=value
      ]
The pam_debug PAM module is intended as a debugging aide for determining how the PAM stack is operating. This module returns what its module arguments tell it to return.
auth=value
        
            The
	    pam_sm_authenticate(3) function will return
            value.
          
cred=value
        
            The
	    pam_sm_setcred(3) function will return
            value.
          
acct=value
        
            The
	    pam_sm_acct_mgmt(3) function will return
            value.
          
prechauthtok=value
        
            The
	    pam_sm_chauthtok(3) function will return
            value if the
            PAM_PRELIM_CHECK flag is set.
          
chauthtok=value
        
            The
	    pam_sm_chauthtok(3) function will return
            value if the
            PAM_PRELIM_CHECK flag is
            not set.
          
open_session=value
        
            The
	    pam_sm_open_session(3) function will return
            value.
          
close_session=value
        
            The
	    pam_sm_close_session(3) function will return
            value.
          
      Where value can be one of: success,
      open_err, symbol_err, service_err, system_err, buf_err, perm_denied,
      auth_err, cred_insufficient, authinfo_unavail, user_unknown,
      maxtries, new_authtok_reqd, acct_expired, session_err, cred_unavail,
      cred_expired, cred_err, no_module_data, conv_err, authtok_err,
      authtok_recover_err, authtok_lock_busy, authtok_disable_aging,
      try_again, ignore, abort, authtok_expired, module_unknown,
      bad_item, conv_again, incomplete.
    
Default return code if no other value was specified, else specified return value.
auth    requisite       pam_permit.so
auth    [success=2 default=ok]  pam_debug.so auth=perm_denied cred=success
auth    [default=reset]         pam_debug.so auth=success cred=perm_denied
auth    [success=done default=die] pam_debug.so
auth    optional        pam_debug.so auth=perm_denied cred=perm_denied
auth    sufficient      pam_debug.so auth=success cred=success