diff options
| author | Denis Ovsienko <denis@ovsienko.info> | 2020-08-29 02:48:07 +0100 |
|---|---|---|
| committer | Denis Ovsienko <denis@ovsienko.info> | 2020-08-29 02:48:07 +0100 |
| commit | 870eeabe8970db22c9c5f88d64b7b37bdd84bd49 (patch) | |
| tree | 1dc681bf4c661c02512a4b9b08cd4d71e59ccc09 /tcpdump.1.in | |
| parent | bc3bc62f51d022e86618a7c8d5408cbec06020c9 (diff) | |
| download | tcpdump-870eeabe8970db22c9c5f88d64b7b37bdd84bd49.tar.gz | |
Report periodic stats only when safe to do so. [skip ci]tcpdump-4.10.0-bp
As explained in GH #155, when tcpdump is given -r, -w and -v and it
takes long enough to read from the input file (because it is stdin
connected through network or a pipe to stdout of another tcpdump doing
a live capture), pcap_loop() will error before long. One of the ways to
reproduce the fault is as follows:
$ tcpdump -i eno1 -w - | tcpdump -r - -w /tmp/tmp.pcap -v
tcpdump: listening on eno1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
reading from file -, link-type EN10MB (Ethernet), snapshot length 262144
tcpdump: pcap_loop: error reading dump file: Interrupted system call
Skip the verbose_stats_dump() timer setup in this specific corner case
for the time being and document it.
Diffstat (limited to 'tcpdump.1.in')
| -rw-r--r-- | tcpdump.1.in | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tcpdump.1.in b/tcpdump.1.in index 7f716ab8..bf4d7b20 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 "10 Aug 2020" +.TH TCPDUMP 1 "29 Aug 2020" .SH NAME tcpdump \- dump traffic on a network .SH SYNOPSIS @@ -808,6 +808,8 @@ IP and ICMP header checksum. .IP 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. .TP .B \-vv |