# phpman > info > pam_get_data

[PAM_GET_DATA(3)](https://www.chedong.com/phpMan.php/man/PAMGETDATA/3/markdown)                Linux-PAM Manual                [PAM_GET_DATA(3)](https://www.chedong.com/phpMan.php/man/PAMGETDATA/3/markdown)

NAME
       pam_get_data - get module internal data

SYNOPSIS
       #include <security/pam_modules.h>

       int pam_get_data(const pam_handle_t *pamh,
                        const char *module_data_name, const void **data);

DESCRIPTION
       This function together with the [pam_set_data(3)](https://www.chedong.com/phpMan.php/man/pamsetdata/3/markdown) function is useful to
       manage module-specific data meaningful only to the calling PAM module.

       The pam_get_data function looks up the object associated with the
       (hopefully) unique string module_data_name in the PAM context specified
       by the pamh argument. A successful call to pam_get_data will result in
       data pointing to the object. Note, this data is not a copy and should
       be treated as constant by the module.

RETURN VALUES
       PAM_SUCCESS
           Data was successful retrieved.

       PAM_SYSTEM_ERR
           A NULL pointer was submitted as PAM handle or the function was
           called by an application.

       PAM_NO_MODULE_DATA
           Module data not found or there is an entry, but it has the value
           NULL.

SEE ALSO
       [pam_end(3)](https://www.chedong.com/phpMan.php/man/pamend/3/markdown), [pam_set_data(3)](https://www.chedong.com/phpMan.php/man/pamsetdata/3/markdown), [pam_strerror(3)](https://www.chedong.com/phpMan.php/man/pamstrerror/3/markdown)

Linux-PAM Manual                  06/08/2020                   [PAM_GET_DATA(3)](https://www.chedong.com/phpMan.php/man/PAMGETDATA/3/markdown)