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man: Clarify the "any" pseudo-interface further. [skip ci]

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In the -f flag description just refer to the -i flag description to
deduplicate the prose.  In the -i flag description reword the "any" note
consistently with that in pcap_create(3PCAP) and pcap_open_live(3PCAP).
This commit is contained in:
Denis Ovsienko 2024-09-07 11:03:56 +01:00
parent 40bf885bd5
commit 70e4bc73c3
2 changed files with 12 additions and 7 deletions
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@ -60,6 +60,8 @@ DayOfTheWeek, Month DD, YYYY / The Tcpdump Group
Make illumos build warning-free.
Makefile.in: Update the .c.o build rule (Remove hacks for old SunOS 4).
Autoconf: fix buggy tests for ether_ntohost().
Documentation:
man: Clarify the "any" pseudo-interface further.
DayOfTheWeek, Month DD, YYYY / The Tcpdump Group
Summary for 4.99.6 tcpdump release (so far!)

17
tcpdump.1.in
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@ -20,7 +20,7 @@
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.TH TCPDUMP 1 "15 May 2024"
.TH TCPDUMP 1 "7 September 2024"
.SH NAME
tcpdump \- dump traffic on a network
.SH SYNOPSIS
@ -408,10 +408,9 @@ The test for `foreign' IPv4 addresses is done using the IPv4 address and
netmask of the interface on that capture is being done. If that
address or netmask are not available, either because the
interface on that capture is being done has no address or netmask or
because it is the "any" pseudo-interface, which is
available in Linux and in recent versions of macOS and Solaris, and which
can capture on more than one interface, this option will not work
correctly.
because it is the "any" pseudo-interface (see the
.B \-i
flag below), this option will not work correctly.
.TP
.BI \-F " file"
Use \fIfile\fP as input for the filter expression.
@ -462,10 +461,14 @@ flag is not given, \fItcpdump\fP searches the system
interface list for the lowest numbered, configured up interface
(excluding loopback), which may turn out to be, for example, ``eth0''.
.IP
On Linux systems with 2.2 or later kernels and on recent versions of macOS
On all supported Linux systems, as well as on recent versions of macOS
and Solaris, an
.I interface
argument of ``any'' can be used to capture packets from all interfaces.
argument of ``any'' can be used to capture packets from all network interfaces.
The latter should not be confused with all available capture devices as printed
by the
.B \-D
flag, which may also include D-Bus, USB etc.
Note that captures on the ``any'' pseudo-interface will not be done in promiscuous
mode.
.IP