add -max param to gotail utility

cmd/gotail/gotail.go

@@ -12,7 +12,9 @@ import (
 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")
@@ -20,6 +22,7 @@ func args2config() (tail.Config, int64) {
 	if config.ReOpen {
 		config.Follow = true
 	}
+	config.MaxLineSize = maxlinesize
 	return config, n
 }
 

tail.go

@@ -234,7 +234,7 @@ func (tail *Tail) tailFileSync() {
 					return
 				}
 			}
-		}else if err == io.EOF {
+		} else if err == io.EOF {
 			if !tail.Follow {
 				return
 			}
@@ -248,7 +248,7 @@ func (tail *Tail) tailFileSync() {
 				}
 				return
 			}
-		}else {
+		} else {
 			// non-EOF error
 			tail.Killf("Error reading %s: %s", tail.Filename, err)
 			return