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Re: bin/48005 (tcpdump: option -C broken)
The following reply was made to PR bin/48005; it has been noted by GNATS.
From: "David H. Gutteridge" <dhgutteridge%sympatico.ca@localhost>
Subject: Re: bin/48005 (tcpdump: option -C broken)
Date: Thu, 02 Mar 2017 18:19:45 -0500
My suggested amendments to the tcpdump man page:
@@ -20,7 +20,7 @@
Â .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES
Â .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-.TH TCPDUMP 8Â Â "17 September 2015"
+.TH TCPDUMP 8Â Â "2 March 2017"
Â .SH NAME
Â tcpdump \- dump traffic on a network
Â .SH SYNOPSIS
@@ -254,6 +254,11 @@
Â flag, with a number after it, starting at 1 and continuing upward.
Â The units of \fIfile_size\fP are millions of bytes (1,000,000 bytes,
Â not 1,048,576 bytes).
+Note if this is used in conjunction with the
+option (the default on NetBSD), the process will likely not have
+adequate permissions to open subsequent savefiles.
Â .B \-d
Â Dump the compiled packet-matching code in a human readable form to
@@ -861,15 +866,16 @@
Â .I tcpdump
-is running as root, after opening the capture device or input savefile,
-but before opening any savefiles for output, change the user ID to
+is running as root, after opening the capture device, input savefile,
+or initial output savefile, change the user ID to
Â .I user
Â and the group ID to the primary group of
Â .IR user .
Â This behavior is the default for NetBSD where
Â .I tcpdumpÂ
-runs as the user ``_tcpdump''.
+runs as the user ``_tcpdump'', with its root directory changed to
Â .IP "\fI expression\fP"
Â selects which packets will be dumped.
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