Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

pcap_open_dead(3pcap) [v7 man page]

PCAP_OPEN_DEAD(3PCAP)													     PCAP_OPEN_DEAD(3PCAP)

NAME
pcap_open_dead - open a fake pcap_t for compiling filters or opening a capture for output SYNOPSIS
#include <pcap/pcap.h> pcap_t *pcap_open_dead(int linktype, int snaplen); DESCRIPTION
pcap_open_dead() is used for creating a pcap_t structure to use when calling the other functions in libpcap. It is typically used when just using libpcap for compiling BPF code. linktype specifies the link-layer type for the pcap_t. snaplen specifies the snapshot length for the pcap_t. SEE ALSO
pcap(3PCAP), pcap-linktype(7) 5 April 2008 PCAP_OPEN_DEAD(3PCAP)

Check Out this Related Man Page

PCAP_OPEN_DEAD(3PCAP)													     PCAP_OPEN_DEAD(3PCAP)

NAME
pcap_open_dead, pcap_open_dead_with_tstamp_precision - open a fake pcap_t for compiling filters or opening a capture for output SYNOPSIS
#include <pcap/pcap.h> pcap_t *pcap_open_dead(int linktype, int snaplen); pcap_t *pcap_open_dead_with_tstamp_precision(int linktype, int snaplen, u_int precision); DESCRIPTION
pcap_open_dead() and pcap_open_dead_with_tstamp_precision() are used for creating a pcap_t structure to use when calling the other func- tions in libpcap. It is typically used when just using libpcap for compiling BPF code; it can also be used if using pcap_dump_open(), pcap_dump(), and pcap_dump_close() to write a savefile if there is no pcap_t that supplies the packets to be written. linktype specifies the link-layer type for the pcap_t. snaplen specifies the snapshot length for the pcap_t. When pcap_open_dead_with_tstamp_precision(), is used to create a pcap_t for use with pcap_dump_open(), precision specifies the time stamp precision for packets; PCAP_TSTAMP_PRECISION_MICRO should be specified if the packets to be written have time stamps in seconds and microseconds, and PCAP_TSTAMP_PRECISION_NANO should be specified if the packets to be written have time stamps in seconds and nanoseconds. Its value does not affect pcap_compile(). SEE ALSO
pcap(3PCAP), pcap_compile(3PCAP), pcap_dump_open(3PCAP), pcap-linktype(7) 3 January 2014 PCAP_OPEN_DEAD(3PCAP)
Man Page

14 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

The efficiency between GREP and SED???

Hello Everyone! I am a newbie. I'd like to get key lines from a big txt file by Reg Exp, The file is nearly 22MB. GREP or SED?which may be the best choice,more efficient way? or any other best practise? Thank you in advance. Ever:) (5 Replies)
Discussion started by: ever
5 Replies

2. AIX

crontab every 5 min.

Hi running aix 6.1 oslevel 6100-07-03-1207 I need to confirm that this cron entry is set properly. I need it set for every 5 min. 0,5,10,15,20,25,30,35,40,45,50,55 * * * * /path/to/script.sh it does not appear that it is running every 5 min but it did in the beginning. (4 Replies)
Discussion started by: vpundit
4 Replies

3. Shell Programming and Scripting

Goto - UNIX v6 Manual Questions

Hey :) I am trying to understand the command goto. I have some questions regarding the goto manual. 1.What does the underlined part mean? I'm not allowed to type goto in the shell? But if goto is written into a file everything is okay? 2.So if a part of my file looks like this ... goto... (8 Replies)
Discussion started by: orbit
8 Replies

4. AIX

[Tip] HACMP 7.1.3 and DB/2-Installation

We just found out that the installation of DB/2 on a HACMP- (PowerHA-) Cluster running v7.1.3 is not possible due to a bug in HACMP. DB/2-version was 10.5 but this seems to apply to 10.1 too (and probably other versions as well). The error message the DB/2-installer issues is something like: ... (2 Replies)
Discussion started by: bakunin
2 Replies

5. Shell Programming and Scripting

Need to add prefix using sed or awk from cat the file

I need the use sed or AWK using cat the file Node1 TDEV RW 1035788 TDEV RW 1035788 Server1 TDEV RW 69053 Server2 TDEV RW 69053 TDEV RW 103579 Server3 TDEV RW 69053 server4 RDF1+TDEV RW 69053 RDF1+TDEV RW 517894 RDF1+TDEV RW 621473 server6 TDEV RW 34526 TDEV RW 34526 (22 Replies)
Discussion started by: ranjancom2000
22 Replies

6. UNIX for Beginners Questions & Answers

Sort by values in the 1st row, leaving first four coulumns untouched

Dear all, will be thankful if you can help on sort command. My data looks like (tab separated; number of columns 2317; N of rows ~200000): a b c d V10 V2 V8 V4 V7 xx z y 1000 1 2 0 2 0 tr v m 1001 0 0 1 2 2 rg s ... (7 Replies)
Discussion started by: kush
7 Replies

7. Solaris

Need help to compile and create python64 bit (2.7.9) on Solaris10

Hi, I am trying to build python(2.7.9) 64 bit from source on solaris10. Using the below to compile ./configure CFLAGS=-m64 LDFLAGS=-m64 But getting errors like below while executing make make: Fatal error: Command failed for target `libinstall' OS info: isainfo -v 64-bit amd64... (9 Replies)
Discussion started by: Sumanthsv
9 Replies

8. Shell Programming and Scripting

Read a file and save every word in a variable to use

Hello there so i have a txt file containing word like "one two three four plus four five six". I want to save every word in the file into a variable, and then use that variable to generate real numbers and apply the arithmetic value on them. example: the txt files becomes 123 + 456 and... (10 Replies)
Discussion started by: azaiiez
10 Replies

9. UNIX for Advanced & Expert Users

Required libs to compile libXft

Hello. I am looking for all the necessary packages required to be able to compile libXft. I tried to compile libXft-2.1.8.2$ and the error message was: checking for XRENDER... checking for XRENDER... checking for X... no checking X11/extensions/Xrender.h usability... no checking... (1 Reply)
Discussion started by: colt
1 Replies

10. What is on Your Mind?

Cyber Dystopia Teaser (720 HD)

Working on a new cybersecurity, dystopian world series and made a short 2 min teaser today. Cyber Dystopia (720 HD) https://www.youtube.com/watch?v=g9Ca07J_YC8 If anyone has any ideas for the story, please write out some story lines in the comments and join the production team! (1 Reply)
Discussion started by: Neo
1 Replies

11. UNIX for Beginners Questions & Answers

Linux froze and got back working 5 days later, no reboot.

Hello my friends, I've come across the weirdest of glitches. I'm running a simple weather monitor (just temperature) on a Raspbeery Pi 3B (Raspbian Linux 4.14.98-v7+). It has a 3G modem that sends out simple packets to my server at home. On june 5th I lost remote access to the device.... (1 Reply)
Discussion started by: OmahaWiz
1 Replies

12. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

13. Shell Programming and Scripting

Building JSON command with bash script

Hello. I'm new to bash script and I'm learning the basics by writing some scripts. Recently a friend of mine asked me if I could try to write a script to him to automate a couple of processes that uses JSON RPCs. I'll try to explain in few words the workflow just to contextualize the problem.... (48 Replies)
Discussion started by: psysc0rpi0n
48 Replies

14. UNIX for Beginners Questions & Answers

Bash - here document on RHEL 6.8 and 6.9 servers aren't working

H Forum, I was thankful in getting help from this post that allowed me to connect to multiple severs at once using here documents to gather data into variables. But I've discovered that the same bash command that works on my RHEL 7 servers do not work on RHEL 6? What's strange about my... (4 Replies)
Discussion started by: greavette
4 Replies