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// Package xcb implements X11 ChangeHosts via libxcb.
package xcb
//#include <stdlib.h>
//#include <xcb/xcb.h>
//#cgo linux LDFLAGS: -lxcb
import "C"
import (
"errors"
"unsafe"
)
const (
HostModeInsert = C.XCB_HOST_MODE_INSERT
HostModeDelete = C.XCB_HOST_MODE_DELETE
FamilyInternet = C.XCB_FAMILY_INTERNET
FamilyDecnet = C.XCB_FAMILY_DECNET
FamilyChaos = C.XCB_FAMILY_CHAOS
FamilyServerInterpreted = C.XCB_FAMILY_SERVER_INTERPRETED
FamilyInternet6 = C.XCB_FAMILY_INTERNET_6
)
type ConnectionError struct {
err error
}
func (e *ConnectionError) Error() string {
return e.err.Error()
}
func (e *ConnectionError) Unwrap() error {
return e.err
}
var (
ErrChangeHosts = errors.New("xcb_change_hosts() failed")
)
func ChangeHosts(mode, family C.uint8_t, address string) error {
c := C.xcb_connect(nil, nil)
defer C.xcb_disconnect(c)
if err := xcbHandleConnectionError(c); err != nil {
return &ConnectionError{err}
}
addr := C.CString(address)
cookie := C.xcb_change_hosts_checked(c, mode, family, C.ushort(len(address)), (*C.uchar)(unsafe.Pointer(addr)))
C.free(unsafe.Pointer(addr))
if err := xcbHandleConnectionError(c); err != nil {
return &ConnectionError{err}
}
e := C.xcb_request_check(c, cookie)
if e != nil {
defer C.free(unsafe.Pointer(e))
return ErrChangeHosts
}
return nil
}
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