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