Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Grep couple of consecutive lines if each lines contains certain string
Top Forums Shell Programming and Scripting Grep couple of consecutive lines if each lines contains certain string Post 302648785 by drl on Wednesday 30th of May 2012 10:46:57 AM
Old 05-30-2012
Hi, Scrutinizer.
Quote:
Originally Posted by Scrutinizer
@drl, grep cannot do this and I do not think cgrep is present on Solaris, is it? cgrep looks nice though and it is fast indeed. I presume cgrep was tested against gawk, which is one of the slowest awks. Perhaps you could compare it to the fastest awk, which is mawk..
I have only the old Solaris-X86 running in a VM:
Code:
OS, ker|rel, machine: SunOS, 5.10, i86pc
Distribution        : Solaris 10 10/08 s10x_u6wos_07b X86

There are a number of repos which may have it, but I have not searched extensively. I can try to see if cgrep will compile on Solaris (it was an easy make on Linux, both 32-and-64-bit), but that will be a low-priority task.

An excerpt from a searching benchmark on a 100MB file shows:

Code:
By cpu:
        code   cpu   real system real/cpu cpu/best real/best sys/best
       cgrep  0.15   0.30   0.12     2.00     1.00      1.30     2.40
   fgrep (2)  0.16   0.24   0.06     1.50     1.07      1.04     1.20
        grep  0.16   0.23   0.06     1.44     1.07      1.00     1.20
       agrep  0.20   0.28   0.05     1.40     1.33      1.22     1.00
         awk  1.32   1.45   0.08     1.10     8.80      6.30     1.60
        mawk  1.36   1.46   0.06     1.07     9.07      6.35     1.20
        perl  1.36   1.50   0.07     1.10     9.07      6.52     1.40
         sed  1.36   1.46   0.06     1.07     9.07      6.35     1.20
        ruby  1.96   2.14   0.12     1.09    13.07      9.30     2.40
        java  2.19   2.51   0.12     1.15    14.60     10.91     2.40

So for that task the versions used were:
Code:
mawk 1.3.3 Nov 1996, Copyright (C) Michael D. Brennan
gawk GNU Awk 3.1.5

Best wishes ... cheers, drl
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

grep string & next n lines

need help on this. let say i hv 1 file contains as below: STRING Description bla bla bla Description yada yada yada Data bla bla Data yada yada how do i want to display n lines after the string? thanks in advance! (8 Replies)
Discussion started by: ashterix
8 Replies

2. Shell Programming and Scripting

Grep string but also it will show the next 5 lines

Hi experts, I want to grep a number 9366109380 from a file but it will also show me the next 5 lines. Below is the example- when i grep 989366109380, i can also see the next 5 lines. Line 1. <fullOperation>MAKE:NUMBER:9366109380:PPAY2;</fullOperation> Line 2.... (10 Replies)
Discussion started by: thepurple
10 Replies

3. Shell Programming and Scripting

grep string & a few lines after

i need to grep a STRING_A & the next few lines after the STRING_A example file: STRING_A yada yada line 1 line 2 STRING_B yada yada line 1 line 2 line 3 STRING_A yada yada line 1 line 2 line 3 line 4 STRING_A yada yada line 1 line 2 line 3 line 4 (7 Replies)
Discussion started by: ashterix
7 Replies

4. Shell Programming and Scripting

Print lines between two lines after grep for a text string

I have several very large file that are extracts from Oracle tables. These files are formatted in XML type syntax with multiple entries like: <ROW> some information more information </ROW> I want to grep for some words, then print all lines between <ROW> AND </ROW>. Can this be done with AWK?... (7 Replies)
Discussion started by: jbruce
7 Replies

5. Shell Programming and Scripting

Merge two non-consecutive lines based on line number or string

This is a variation of an earlier post found here: unixcom/shell-programming-scripting/159821-merge-two-non-consecutive-lines.html User Bartus11 was kind enough to solve that example. Previously, I needed help combining two lines that are non-consecutive in a file. Now I need to do the... (7 Replies)
Discussion started by: munkee
7 Replies

6. Shell Programming and Scripting

Grep a string from input file and delete next three lines including the line contains string in xml

Hi, 1_strings file contains $ cat 1_strings /home/$USER/Src /home/Valid /home/Review$ cat myxml <projected value="some string" path="/home/$USER/Src"> <input 1/> <estimate value/> <somestring/> </projected> <few more lines > <projected value="some string" path="/home/$USER/check">... (4 Replies)
Discussion started by: greet_sed
4 Replies

7. Shell Programming and Scripting

Grep 2 consecutive lines and replace the second line in a file

I have a file lake this cat ex1.txt </DISCOUNTS> <B2B_SPECIFICATION elem="0"> <B2B_SPECIFICATION elem="0"> <DESCR>Netti 2 </DESCR> <NUMBER>D02021507505</NUMBER> </B2B_SPECIFICATION> <B2B_SPECIFICATION elem="1"> <DESCR>Puhepaketti</DESCR>... (2 Replies)
Discussion started by: Dhoni
2 Replies

8. Shell Programming and Scripting

Grep a string and count following lines starting with another string

I have a large dataset with following structure; C 0001 Carbon D SAR001 methane D SAR002 ethane D SAR003 propane D SAR004 butane D SAR005 pentane C 0002 Hydrogen C 0003 Nitrogen C 0004 Oxygen D SAR011 ozone D SAR012 super oxide C 0005 Sulphur D SAR013... (3 Replies)
Discussion started by: Syeda Sumayya
3 Replies

9. Shell Programming and Scripting

Grep three consecutive lines if each lines contains certain string

say we have : 2914 | REQUEST | whatever 2914 | RESPONSE | whatever 2914 | SUCCESS | whatever 2985 | RESPONSE | whatever 2986 | REQUEST | whatever 2990 | REQUEST | whatever 2985 | RESPONSE | whatever 2996 | REQUEST | whatever 2010 | SUCCESS | whatever 2013 | REQUEST | whatever 2013 |... (7 Replies)
Discussion started by: Saumitra Pandey
7 Replies

10. Shell Programming and Scripting

Remove duplicate consecutive lines with specific string

Hello, I'm trying to remove the duplicate consecutive lines with specific string "WARNING". File.txt abc; WARNING 2345 WARNING 2345 WARNING 2345 WARNING 2345 WARNING 2345 bcd; abc; 123 123 123 WARNING 1234 WARNING 2345 WARNING 2345 efgh; (6 Replies)
Discussion started by: Mannu2525
6 Replies

LEARN ABOUT LINUX

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
All times are GMT -4. The time now is 12:50 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy