You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rctl.go
    path of file: ./repos/podman/pkg/rctl
    
    the code of the file until where you have to start completion: //go:build freebsd

package rctl

import (
	"bytes"
	"fmt"
	"strconv"
	"strings"
	"syscall"
	"unsafe"

	"github.com/sirupsen/logrus"
)

func Get
    
func GetRacct(filter string) (map[string]uint64, error) {
	bp, err := syscall.ByteSliceFromString(filter)
	if err != nil {
		return nil, err
	}
	var buf [1024]byte
	_, _, errno := syscall.Syscall6(syscall.SYS_RCTL_GET_RACCT,
		uintptr(unsafe.Pointer(&bp[0])),
		uintptr(len(bp)),
		uintptr(unsafe.Pointer(&buf[0])),
		uintptr(len(buf)), 0, 0)
	if errno != 0 {
		return nil, fmt.Errorf("error calling rctl_get_racct with filter %s: %v", errno)
	}
	len := bytes.IndexByte(buf[:], byte(0))
	entries := strings.Split(string(buf[:len]), ",")
	res := make(map[string]uint64)
	for _, entry := range entries {
		key, valstr, _ := strings.Cut(entry, "=")
		val, err := strconv.ParseUint(valstr, 10, 0)
		if err != nil {
			logrus.Warnf("unexpected rctl entry, ignoring: %s", entry)
		}
		res[key] = val
	}
	return res, nil
}