func main() {
flag.Usage = usage
flag.Parse()
if flag.NArg() < 1 {
flag.Usage()
os.Exit(1)
}
var err error
argl := list.New()
for _, s := range os.Args[1:] {
args := strings.Split(s, ":")
arg := &Arg{args[0], nil, 0}
if len(args) > 1 && len(args[1]) > 0 {
if arg.filter, err = lotf.RegexpFilter(args[1]); err != nil {
glog.Fatalf("could not create filter from: %s, error: %s", args[1], err)
}
}
if len(args) > 2 {
if arg.lines, err = strconv.ParseUint(args[2], 0, 64); err != nil {
glog.Fatalf("invalid number of lines: %s", args[2])
}
}
argl.PushBack(arg)
}
tw, err := lotf.NewTailWatcher()
if err != nil {
glog.Fatalf("could not create watcher: %s", err)
}
go func() {
for err = range tw.Error {
fmt.Printf("ERROR: %s\n", err)
os.Exit(1)
}
}()
ch := make(chan string)
for e := argl.Front(); e != nil; e = e.Next() {
arg := e.Value.(*Arg)
go func() {
maxlines := 1
if arg.lines > 0 {
maxlines = int(arg.lines)
}
tail, err := tw.Add(arg.fname, maxlines, arg.filter, int(arg.lines))
if err != nil {
glog.Fatalf("could not add %s to watcher: %s", arg.fname, err)
}
for s := tail.WaitNext(); s != nil; s = tail.WaitNext() {
ch <- *s
}
}()
}
for line := range ch {
fmt.Println(line)
}
}
func makeResources(fname string) ([]LTFResource, error) {
var err error
r, err := os.Open(fname)
if err != nil {
return nil, err
}
s := make([]RCEntry, 0)
dec := json.NewDecoder(r)
for {
if err := dec.Decode(&s); err == io.EOF {
break
} else if err != nil {
return nil, err
}
}
t := make([]LTFResource, len(s))
for i, e := range s {
t[i].filename = e.File
t[i].buflines = e.Buflines
if len(e.Filter) > 0 {
if t[i].filter, err = lotf.RegexpFilter(e.Filter); err != nil {
return nil, err
}
}
if len(e.Udpaddr) > 0 {
if t[i].udpaddr, err = net.ResolveUDPAddr("udp4", e.Udpaddr); err != nil {
return nil, err
}
}
if len(e.Tcpaddr) > 0 {
if t[i].tcpaddr, err = net.ResolveTCPAddr("tcp4", e.Tcpaddr); err != nil {
return nil, err
}
}
}
return t, nil
}
func makeResources(fname string) (*config, error) {
r, err := os.Open(fname)
if err != nil {
return nil, err
}
s := &Config{Lotfs: make([]LotfConfig, 0)}
dec := json.NewDecoder(r)
for {
if err := dec.Decode(s); err == io.EOF {
break
} else if err != nil {
return nil, err
}
}
lotfs := make(map[string]*lotfConfig)
for _, v := range s.Lotfs {
// XXX: check required json entries
if len(v.Name) == 0 {
return nil, errors.New("no name specified in lotfs")
}
if _, found := lotfs[v.Name]; found {
return nil, errors.New(fmt.Sprintf("founnd dup name: %s", v.Name))
}
var filter lotf.Filter
if len(v.Filter) > 0 {
filter, err = lotf.RegexpFilter(v.Filter)
if err != nil {
return nil, errors.New(fmt.Sprintf("create filter: %s", v.Filter))
}
} else {
filter = nil
}
if len(v.File) == 0 {
return nil, errors.New(fmt.Sprintf("no file specified: %s", v.Name))
}
lotfs[v.Name] = &lotfConfig{
filename: v.File,
filter: filter,
template: v.Template,
}
}
if len(s.Address) == 0 {
return nil, errors.New("address is not specified")
}
if len(s.Root) == 0 {
return nil, errors.New("root is not specified")
}
if len(s.Template) == 0 {
return nil, errors.New("default template is not specified")
}
if s.Interval == 0 {
return nil, errors.New("interval is not specified")
}
if s.Buflines == 0 {
return nil, errors.New("buflines is not specified")
}
if s.Lastlines == 0 {
return nil, errors.New("lastlines is not specified")
}
if len(lotfs) == 0 {
return nil, errors.New("no lotf specified")
}
if s.Root[len(s.Root)-1] != '/' {
s.Root += "/"
}
return &config{
addr: s.Address,
root: s.Root,
template: s.Template,
interval: s.Interval,
buflines: s.Buflines,
lastlines: s.Lastlines,
lotfs: lotfs,
}, nil
}
