Sponsored Content
Top Forums UNIX for Dummies Questions & Answers How to print results from two lines using awk? Post 302844667 by RudiC on Monday 19th of August 2013 03:54:47 PM
Old 08-19-2013
Does it work?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to print number of lines with awk ?

Can some body tell me how to print number of line from a particular file, with sed. ? Input file format AAAA BBBB CCCC SDFFF DDDD DDDD Command to print line 2 and 3 ? BBBB CCCC And also please tell me how to assign column sum to variable. I user the following command it... (1 Reply)
Discussion started by: maheshsri
1 Replies

2. Shell Programming and Scripting

How to print only lines in between two strings using awk

Hi, I want to print only lines in between two strings and not the strings using awk. Eg: OUTPUT top 2 bottom 1 left 0 right 0 page 66 END I want to print into a new file only top 2 bottom 1 left 0... (4 Replies)
Discussion started by: jisha
4 Replies

3. Shell Programming and Scripting

print first few lines, then apply regex on a specific column to print results.

abc.dat tty cpu tin tout us sy wt id 0 0 7 3 19 71 extended device statistics r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device 0.0 133.2 0.0 682.9 0.0 1.0 0.0 7.2 0 79 c1t0d0 0.2 180.4 0.1 5471.2 3.0 2.8 16.4 15.6 15 52 aaaaaa1-xx I want to skip first 5 line... (4 Replies)
Discussion started by: kchinnam
4 Replies

4. UNIX for Dummies Questions & Answers

Awk print all lines on match?

Ok so I can use awk to match a pattern and print the whole line with print $0. Is there any way to just tell awk to print every line of output when the pattern matches? I'm having it wait for the word error and then print that entire line. But what I actually need to see is all the following... (9 Replies)
Discussion started by: MrEddy
9 Replies

5. Shell Programming and Scripting

awk print lines in a file

Dear All, a.txt A 1 Z A 1 ZZ B 2 Y B 2 AA how can i use awk one line to achieve the result: A Z|ZZ B Y|AA Thanks (5 Replies)
Discussion started by: jimmy_y
5 Replies

6. Shell Programming and Scripting

Awk find in columns with "if then" statement and print results

I have a file1.txt file1.txt F-120009210","Felix","U-M-F-F-F-","white","yes","no","U-M-F-F-F-","Bristol","RI","true" F-120009213","Fluffy","U-F-","white","yes","no","M-F-","Warwick","RI","true" U-120009217","Lity","U-M-","grey","yes","yes","","Fall River","MA","true"... (4 Replies)
Discussion started by: charles33
4 Replies

7. Shell Programming and Scripting

AWK and print next lines #3 thru #10

I have a output log file, that I want to extract some temperature measurement data. I want to AWK on the words "show chassis environment" in the original file, and extract that entire line, and then the 3rd to 10th lines after the one I AWK'd, into a seperate output file. Here is an example... (3 Replies)
Discussion started by: HikerLT
3 Replies

8. Shell Programming and Scripting

Removing certain lines from results - awk

im using the code below to monitor a file: gawk '{ a += gsub("(^| )accepted( |$)", "&") a += gsub("(^| )open database( |$)", "&") } END { for (i in a) printf("%s=%s\n", i, a) }' /var/log/syslog the code is searching the syslog file for the string "accepted" and "open... (2 Replies)
Discussion started by: SkySmart
2 Replies

9. UNIX for Dummies Questions & Answers

awk - (URGENT!) Print lines sort and move lines if match found

URGENT HELP IS NEEDED!! I am looking to move matching lines (01 - 07) from File1 and 77 tab the matching string from File2, to File3.txt. I am almost done but - Currently, script is not printing lines to File3.txt in order. - Also the matching lines are not moving out of File1.txt ... (1 Reply)
Discussion started by: High-T
1 Replies

10. Shell Programming and Scripting

Parsing OSX UNIX command results which print in multiple lines

from the CLI on a Mac, if you type networksetup -listallnetworkservices then you get results in a multi-line paragraph that look something like this: networksetup -listallnetworkservices An asterisk (*) denotes that a network service is disabled. Wi-Fi Display Ethernet Bluetooth DUN... (7 Replies)
Discussion started by: hungryd
7 Replies
PCAP_GET_SELECTABLE_FD(3PCAP)											     PCAP_GET_SELECTABLE_FD(3PCAP)

NAME
pcap_get_selectable_fd - get a file descriptor on which a select() can be done for a live capture SYNOPSIS
#include <pcap/pcap.h> int pcap_get_selectable_fd(pcap_t *p); DESCRIPTION
pcap_get_selectable_fd() returns, on UNIX, a file descriptor number for a file descriptor on which one can do a select() or poll() to wait for it to be possible to read packets without blocking, if such a descriptor exists, or -1, if no such descriptor exists. Some network devices opened with pcap_create() and pcap_activate(), or with pcap_open_live(), do not support select() or poll() (for example, regular network devices on FreeBSD 4.3 and 4.4, and Endace DAG devices), so -1 is returned for those devices. Note that in: FreeBSD prior to FreeBSD 4.6; NetBSD prior to NetBSD 3.0; OpenBSD prior to OpenBSD 2.4; Mac OS X prior to Mac OS X 10.7; select() and poll() do not work correctly on BPF devices; pcap_get_selectable_fd() will return a file descriptor on most of those versions (the exceptions being FreeBSD 4.3 and 4.4), but a simple select() or poll() will not indicate that the descriptor is readable until a full buffer's worth of packets is received, even if the read timeout expires before then. To work around this, an application that uses select() or poll() to wait for packets to arrive must put the pcap_t in non-blocking mode, and must arrange that the select() or poll() have a timeout less than or equal to the read timeout, and must try to read packets after that timeout expires, regardless of whether select() or poll() indicated that the file descriptor for the pcap_t is ready to be read or not. (That workaround will not work in FreeBSD 4.3 and later; however, in FreeBSD 4.6 and later, select() and poll() work correctly on BPF devices, so the workaround isn't necessary, although it does no harm.) Note also that poll() doesn't work on character special files, including BPF devices, in Mac OS X 10.4 and 10.5, so, while select() can be used on the descriptor returned by pcap_get_selectable_fd(), poll() cannot be used on it those versions of Mac OS X. Kqueues also don't work on that descriptor. poll(), but not kqueues, work on that descriptor in Mac OS X releases prior to 10.4; poll() and kqueues work on that descriptor in Mac OS X 10.6 and later. pcap_get_selectable_fd() is not available on Windows. RETURN VALUE
A selectable file descriptor is returned if one exists; otherwise, -1 is returned. SEE ALSO
pcap(3PCAP), select(2), poll(2) 5 April 2008 PCAP_GET_SELECTABLE_FD(3PCAP)
All times are GMT -4. The time now is 04:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy