XAddHost 3X11 __xorgversion__ XLIB FUNCTIONS XAddHost XAddHosts XListHosts XRemoveHost XRemoveHosts XSetAccessControl XEnableAccessControl XDisableAccessControl XHostAddress control host access and host control structure int XAddHost ( Display *display, XHostAddress *host ); int XAddHosts ( Display *display, XHostAddress *hosts, int num_hosts ); XHostAddress *XListHosts ( Display *display, int *nhosts_return, Bool state_return ); int XRemoveHost ( Display *display, XHostAddress *host ); int XRemoveHosts ( Display *display, XHostAddress *hosts, int num_hosts ); int XSetAccessControl ( Display *display, int mode ); int XEnableAccessControl ( Display *display ); int XDisableAccessControl ( Display *display ); display Specifies the connection to the X server. host Specifies the host that is to be added or removed. hosts Specifies each host that is to be added or removed. mode Specifies the mode. You can pass  EnableAccess  or  DisableAccess . nhosts_return Returns the number of hosts currently in the access control list. num_hosts Specifies the number of hosts. state_return Returns the state of the access control. The  XAddHost  function adds the specified host to the access control list for that display. The server must be on the same host as the client issuing the command, or a  BadAccess  error results.  XAddHost  can generate  BadAccess  and  BadValue  errors. The  XAddHosts  function adds each specified host to the access control list for that display. The server must be on the same host as the client issuing the command, or a  BadAccess  error results.  XAddHosts  can generate  BadAccess  and  BadValue  errors. The  XListHosts  function returns the current access control list as well as whether the use of the list at connection setup was enabled or disabled.  XListHosts  allows a program to find out what machines can make connections. It also returns a pointer to a list of host structures that were allocated by the function. When no longer needed, this memory should be freed by calling  XFree . The  XRemoveHost  function removes the specified host from the access control list for that display. The server must be on the same host as the client process, or a  BadAccess  error results. If you remove your machine from the access list, you can no longer connect to that server, and this operation cannot be reversed unless you reset the server.  XRemoveHost  can generate  BadAccess  and  BadValue  errors. The  XRemoveHosts  function removes each specified host from the access control list for that display. The X server must be on the same host as the client process, or a  BadAccess  error results. If you remove your machine from the access list, you can no longer connect to that server, and this operation cannot be reversed unless you reset the server.  XRemoveHosts  can generate  BadAccess  and  BadValue  errors. The  XSetAccessControl  function either enables or disables the use of the access control list at each connection setup.  XSetAccessControl  can generate  BadAccess  and  BadValue  errors. The  XEnableAccessControl  function enables the use of the access control list at each connection setup.  XEnableAccessControl  can generate a  BadAccess  error. The  XDisableAccessControl  function disables the use of the access control list at each connection setup.  XDisableAccessControl  can generate a  BadAccess  error. The  XHostAddress  structure contains: typedef struct { int family; /∗ for example FamilyInternet */ int length; /∗ length of address, in bytes */ char *address; /∗ pointer to where to find the address */ } XHostAddress; The family member specifies which protocol address family to use (for example, TCP/IP or DECnet) and can be  FamilyInternet ,  FamilyDECnet , or  FamilyChaos . The length member specifies the length of the address in bytes. The address member specifies a pointer to the address.  BadAccess  A client attempted to modify the access control list from other than the local (or otherwise authorized) host.  BadValue  Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. XFree(3X11) Xlib - C Language X Interface