func args2config() (tail.Config, int64) {
config := tail.Config{Follow: true}
n := int64(0)
maxlinesize := int(0)
flag.Int64Var(&n, "n", 0, "tail from the last Nth location")
flag.IntVar(&maxlinesize, "max", 0, "max line size")
flag.BoolVar(&config.Follow, "f", false, "wait for additional data to be appended to the file")
flag.BoolVar(&config.ReOpen, "F", false, "follow, and track file rename/rotation")
flag.BoolVar(&config.Poll, "p", false, "use polling, instead of inotify")
flag.Parse()
if config.ReOpen {
config.Follow = true
}
config.MaxLineSize = maxlinesize
return config, n
}
func (c config) parseFile(ac map[int]Event, f string) map[int]Event {
tc := tail.Config{}
if *c.TailFile {
tc.Follow = true
tc.ReOpen = true
}
//open file for parsing
t, err := tail.TailFile(f, tc)
check(err)
//loop through file contents
for line := range t.Lines {
var lineMap map[string]string
var ok bool
if lineMap, ok = matchLine(lineRe, line.Text); !ok {
continue
}
connum, err := strconv.Atoi(lineMap["conn_num"])
if err != nil {
fmt.Printf("failed to parse '%s' into int\n", lineMap["conn_num"])
}
if connectionMap, ok := matchLine(connectionOpenRe, lineMap["event"]); ok {
//new connection made
ssl := false
if connectionMap["ssl"] == "SSL" {
ssl = true
}
ac[connum] = Event{
Client: connectionMap["client_ip"],
Server: connectionMap["server_ip"],
Connection: connum,
Operation: -2, //number that shouldn't exist in logs
ConnTime: lineMap["time"],
SSL: ssl,
}
continue
}
if _, exists := ac[connum]; !exists {
//skip operation if no connection exists
// this is caused by connections that were created before we started
// parsing the log file.
continue
}
conn := ac[connum]
if sslMap, ok := matchLine(sslCipherRe, lineMap["event"]); ok {
conn.SSLCipher = sslMap["cipher"]
conn.SSLStrength = sslMap["strength"]
ac[connum] = conn
}
if operationMap, ok := matchLine(operationRe, lineMap["event"]); ok {
//new operation
opnum, err := strconv.Atoi(operationMap["opnum"])
if err != nil {
fmt.Printf("failed to parse '%s' into int\n", operationMap["opnum"])
}
if opnum != conn.Operation {
if conn.Operation != -2 {
c.printEvent(conn)
}
if operationMap["operation"] == "BIND" {
if bindDN, ok := matchLine(bindDNRe, lineMap["event"]); ok {
conn.AuthenticatedDN = bindDN["dn"]
} else {
conn.AuthenticatedDN = "__anonymous__"
}
}
conn.OppTime = lineMap["time"]
conn.Operation = opnum
conn.Action = operationMap["operation"]
conn.Requests = make([]string, 0)
conn.Responses = make([]string, 0)
conn.Requests = append(conn.Requests, operationMap["operation"]+operationMap["details"])
} else {
if operationMap["operation"] == "SORT" || operationMap["operation"] == "VLV" {
conn.Requests = append(conn.Requests, operationMap["operation"]+operationMap["details"])
} else {
conn.Responses = append(conn.Responses, operationMap["operation"]+operationMap["details"])
c.printEvent(conn)
conn.Operation = -2
}
}
ac[connum] = conn
}
if connectionClosedRe.MatchString(lineMap["event"]) {
delete(ac, connum)
}
}
return ac
}