mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-25 07:40:19 +00:00
49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
|
/*
|
||
|
|
Copyright 2024 The Ceph-CSI Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package features
|
||
|
|
|
||
|
|
/*
|
||
|
|
#cgo LDFLAGS: -ldl
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <dlfcn.h>
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
// dlsym checks if the given symbol is provided by the currently loaded
|
||
|
|
// libraries. If the symbol is available, no error is returned.
|
||
|
|
func dlsym(symbol string) error {
|
||
|
|
c_symbol := C.CString(symbol)
|
||
|
|
//nolint:nlreturn // linter complains about missing empty line!?
|
||
|
|
defer C.free(unsafe.Pointer(c_symbol))
|
||
|
|
|
||
|
|
// clear dlerror before looking up the symbol
|
||
|
|
C.dlerror()
|
||
|
|
_ = C.dlsym(nil, c_symbol)
|
||
|
|
e := C.dlerror()
|
||
|
|
err := C.GoString(e)
|
||
|
|
if err != "" {
|
||
|
|
return fmt.Errorf("dlsym: %s", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|