PAM_XAUTH_DATA(3) Linux-PAM Manual PAM_XAUTH_DATA(3)
NAME
pam_xauth_data - structure containing X authentication data
SYNOPSIS
#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.
Linux-PAM 06/29/2025 PAM_XAUTH_DATA(3)
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