docs: adjust description for --print-tos

Every IPv4 packet has a TOS byte. Every IPv6 packet has a TC byte. But fping can only read it when using raw sockets, and only for IPv4.
gsnw · Aug 24, 2024 · c0eb514 · c0eb514
1 parent d565df4
commit c0eb514
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/doc/fping.pod b/doc/fping.pod
@@ -188,7 +188,8 @@ Set the typ of service flag (TOS). I<N> can be either decimal or hexadecimal
 
 =item B<--print-tos>
 
-Displays the TOS value in the output, if TOS is not present, "(TOS unknown)" is returned.
+Displays the TOS value in the output. If B<fping> cannot read the TOS value,
+"(TOS unknown)" is returned.
 IPv4 only, requires root privileges or cap_net_raw.
 
 =item B<-p>, B<--period>=I<MSEC>