// GetConfigOption returns the value of the Ceph configuration option
// identified by the given name.
func (c *Conn) GetConfigOption(name string) (value string, err error) {
buf := make([]byte, 4096)
c_name := C.CString(name)
defer C.free(unsafe.Pointer(c_name))
ret := int(C.rados_conf_get(c.cluster, c_name,
(*C.char)(unsafe.Pointer(&buf[0])), C.size_t(len(buf))))
// FIXME: ret may be -ENAMETOOLONG if the buffer is not large enough. We
// can handle this case, but we need a reliable way to test for
// -ENAMETOOLONG constant. Will the syscall/Errno stuff in Go help?
if ret == 0 {
value = C.GoString((*C.char)(unsafe.Pointer(&buf[0])))
return value, nil
} else {
return "", RadosError(ret)
}
}
// GetConfig returns the configuration value of the given configName.
func (cluster *Cluster) GetConfigValue(configName string) (string, error) {
cn := C.CString(configName)
defer freeString(cn)
bufLen := 8
for {
bufAddr := bufferAddress(bufLen)
ret := C.rados_conf_get(cluster.handle, cn, bufAddr, C.size_t(bufLen))
if int(ret) == -int(syscall.ENAMETOOLONG) {
bufLen *= 2
continue
}
if ret < 0 {
err := toRadosError(ret)
err.Message = fmt.Sprintf("Unable to get config value of %s.", configName)
return "", err
}
value := C.GoString(bufAddr)
return value, nil
}
}