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main.go
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main.go
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package main
import (
"bytes"
"context"
"encoding/binary"
"log"
"os"
"os/signal"
"syscall"
bpf "github.com/aquasecurity/libbpfgo"
)
type Event struct {
Uid uint32
Gid uint32
Pid uint32
Comm [16]byte
Filename [16]byte
}
func parseEvent(data []byte) (*Event, error) {
var event Event
err := binary.Read(bytes.NewBuffer(data), binary.LittleEndian, &event)
if err != nil {
return nil, err
}
return &event, nil
}
func goString(data []byte) string {
return string(bytes.Split(data, []byte("\x00"))[0])
}
func main() {
var err error
defer func() {
if err != nil {
log.Fatalf("%+v", err)
}
}()
bpfModule, err := bpf.NewModuleFromFile("main.bpf.o")
if err != nil {
return
}
defer bpfModule.Close()
if err = bpfModule.BPFLoadObject(); err != nil {
return
}
progIter := bpfModule.Iterator()
for {
prog := progIter.NextProgram()
if prog == nil {
break
}
_, err = prog.AttachLSM()
if err != nil {
return
}
}
log.Println("tracing...")
eventsChannel := make(chan []byte)
lostChannel := make(chan uint64)
pb, err := bpfModule.InitPerfBuf("events", eventsChannel, lostChannel, 1024)
if err != nil {
return
}
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
pb.Start()
defer func() {
pb.Stop()
pb.Close()
stop()
}()
loop:
for {
select {
case data := <-eventsChannel:
event, e := parseEvent(data)
if e != nil {
err = e
return
} else {
log.Printf("uid: %d gid: %d pid: %d comm: %s filename: %s", event.Uid, event.Gid, event.Pid,
goString(event.Comm[:]), goString(event.Filename[:]))
}
case n := <-lostChannel:
log.Printf("lost %d events", n)
case <-ctx.Done():
break loop
}
}
log.Println("bye bye~")
}