Golang my_sd_journal_get_data示例

示例#1

文件： journal.go 项目： intelsdi-x/rkt

func (j *Journal) getData(field string) (unsafe.Pointer, C.int, error) {
	sd_journal_get_data, err := getFunction("sd_journal_get_data")
	if err != nil {
		return nil, 0, err
	}

	f := C.CString(field)
	defer C.free(unsafe.Pointer(f))

	var d unsafe.Pointer
	var l C.size_t

	j.mu.Lock()
	r := C.my_sd_journal_get_data(sd_journal_get_data, j.cjournal, f, &d, &l)
	j.mu.Unlock()

	if r < 0 {
		return nil, 0, fmt.Errorf("failed to read message: %d", syscall.Errno(-r))
	}

	return d, C.int(l), nil
}

示例#2

文件： journal.go 项目： rhuss/gofabric8

// GetData gets the data object associated with a specific field from the
// current journal entry.
func (j *Journal) GetData(field string) (string, error) {
	sd_journal_get_data, err := j.getFunction("sd_journal_get_data")
	if err != nil {
		return "", err
	}

	f := C.CString(field)
	defer C.free(unsafe.Pointer(f))

	var d unsafe.Pointer
	var l C.size_t

	j.mu.Lock()
	r := C.my_sd_journal_get_data(sd_journal_get_data, j.cjournal, f, &d, &l)
	j.mu.Unlock()

	if r < 0 {
		return "", fmt.Errorf("failed to read message: %d", syscall.Errno(-r))
	}

	msg := C.GoStringN((*C.char)(d), C.int(l))

	return msg, nil
}