.Pp
.Nm
operates according to the command flag specified.
+.Pp
+NOTE:
+.Nm
+is obsolete. The command you probably want is
+.Xr ktrace 1
.Sh COMMANDS
.Bl -tag -width Ds
.It Fl h
.Pp
Empty the current kernel trace buffer into
.Ar rawfile
-in a binary format.
+in a binary format. If
+.Ar rawfile
+is
+.Li - ,
+the file will be written to
+.Xr stdout 4 .
.\"
.\" ## trace -L ##
.It Fl L Ar rawfile Fl S Ar seconds
.Pp
Copy the current trace buffer to
.Ar rawfile
-and send all future trace events to
+and send all future trace events to
.Ar rawfile .
.Bl -tag -width Ds
.It Fl S Ar seconds
After
.Ar seconds
-have elapsed, stop recording and exit.
+have elapsed, stop recording and exit. If
+.Ar rawfile
+is
+.Li - ,
+the file will be written to
+.Xr stdout 4 .
.El
.\"
.\" ## trace -R ##
.Pp
Read events from
.Ar rawfile
-and print them in a human-readable format.
+and print them in a human-readable format.
.Bl -tag -width " "
.It Fl F Ar frequency
If