From afb355923c6d4e35a86e89de405545fc1481fcac Mon Sep 17 00:00:00 2001 From: Denis Ovsienko Date: Tue, 15 Sep 2020 11:54:18 +0100 Subject: [PATCH] Add more "-v" detail to tcpdump(1) for GH #380. [skip ci] Capture what Guy has figured out so far. --- tcpdump.1.in | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tcpdump.1.in b/tcpdump.1.in index bf4d7b20b..107a103ca 100644 --- a/tcpdump.1.in +++ b/tcpdump.1.in @@ -20,7 +20,7 @@ .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" -.TH TCPDUMP 1 "29 Aug 2020" +.TH TCPDUMP 1 "15 September 2020" .SH NAME tcpdump \- dump traffic on a network .SH SYNOPSIS @@ -810,7 +810,10 @@ When writing to a file with the .B \-w option and at the same time not reading from a file with the .B \-r -option, report, once per second, the number of packets captured. +option, report to stderr, once per second, the number of packets captured. In +Solaris, FreeBSD and possibly other operating systems this periodic update +currently can cause loss of captured packets on their way from the kernel to +tcpdump. .TP .B \-vv Even more verbose output.