6.3. pam_debug - debug the PAM stack
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## 6.3. pam_debug - debug the PAM stack

`pam_debug.so` [ auth=`value` ] [ cred=`value` ] [ acct=`value` ] [ prechauthtok=`value` ] [ chauthtok=`value` ] [ auth=`value` ] [ open_session=`value` ] [ close_session=`value` ]

### 6.3.1. DESCRIPTION

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.

### 6.3.2. OPTIONS

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.

### 6.3.3. MODULE TYPES PROVIDED

All module types (`auth`, `account`, `password` and `session`) are provided.

### 6.3.4. RETURN VALUES

PAM_SUCCESS

  Default return code if no other value was specified, else specified return value.

### 6.3.5. EXAMPLES

    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

### 6.3.6. AUTHOR

pam_debug was written by Andrew G. Morgan <morgan@kernel.org>.

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