pam_xauth_data

3 Linux-PAM Linux-PAM Manual

pam_xauth_data

structure containing X authentication data

          #include <security/pam_appl.h>

    struct pam_xauth_data {
        int namelen;
        char *name;
        int datalen;
        char *data;
    };

## DESCRIPTION

The `pam_xauth_data` structure contains X authentication data used to make a connection to an X display. Using this mechanism, an application can communicate X authentication data to PAM service modules. This allows modules to make a connection to the user's X display in order to label the user's session on login, display visual feedback or for other purposes.

The name field contains the name of the authentication method, such as "MIT-MAGIC-COOKIE-1". The namelen field contains the length of this string, not including the trailing NUL character.

The data field contains the authentication method-specific data corresponding to the specified name. The datalen field contains its length in bytes.

The X authentication data can be changed with the PAM_XAUTH_DATA item. It can be queried and set with

pam_get_item

3 and

pam_set_item

3 respectively. The value used to set it should be a pointer to a pam_xauth_data structure. An internal copy of both the structure itself and its fields is made by PAM when setting the item.

## SEE ALSO

pam_start

3 ,

pam_get_item

3 ,

## STANDARDS

The `pam_xauth_data` structure and PAM_XAUTH_DATA item are Linux-PAM extensions.