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grep/sed/awk a value between 2 "

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# 1  
Old 08-14-2009
grep/sed/awk a value between 2 "
I have a log file where I'm trying to grep/awk/sed the value between the set of quotes following VALUE="somevalue" in somefile and > it to someotherfile, so take a line like
Code:
<NODE NAME="OS Version" VALUE="Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)" TR="N=4102" />

and output

Microsoft Windows XP...

so I'm trying to read in each line in the file like this
Code:
c=$(cat somefile)
    for i in $c
    do
        grep someregex > someotherfile
    done

but I'm stuck there.
Last edited by unclecameron; 08-14-2009 at 10:07 PM..
# 2  
Old 08-14-2009
Quote:
Originally Posted by unclecameron
I have a log file where I'm trying to grep/awk/sed the value between the set of quotes following VALUE="somevalue" in somefile and > it to someotherfile,
...
Given below are a few techniques for doing this. The redirection part is left for you as an exercise.

Code:
$ 
$ cat -n f1
     1    this is line # 1
     2    <NODE NAME="OS Version" VALUE="Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)" TR="N=4102" />
     3    this is line # 3
$ 
$ # 1
$ grep VALUE= f1 | cut -d'"' -f4
Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)
$ 
$ # 2
$ sed -n 's/.*VALUE="\([^"]*\)".*/\1/p' f1
Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)
$ 
$ # 3
$ awk -F'"' '/VALUE=/{print $4}' f1
Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)
$ 
$ # 4
$ perl -lne '/.*VALUE="(.*?)".*/ && print $1' f1
Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)
$

HTH,
tyler_durden
# 3  
Old 08-15-2009
wonderful, thank you very much, I appreciate the help Smilie
# 4  
Old 08-15-2009
This is a version of an awk clause that will work will any version of awk. It will also ignore lines in the file that don't have a VALUE= in it. And doesn't care where the VALUE= appears in the line. Usage: awk -f <file-with-awk-clause> <input-file>

Code:
# begin awk clause
# only look at input if it has a value k

/VALUE=/{
# get position of Value key
        i=index($0,"VALUE")
# get the string from index to end
        v = substr($0, i+6)
# now get the value using split
        p = split(v, a, "\"")
# print it (index 1 is a empty string)
        print a[2]
}

# End awk clause

Example using cygwin:

Code:
$ cat v.test
line 1
<NODE NAME="OS Version" VALUE="Microsoft Windows XP Professional Service Pack 2
(build 2600) (5.1.2600)" TR="N=4102" />
<NODE NAME="OS Version" VALUE="Microsoft Windows yP Professional Service Pack 2
(build 2600) (5.1.2600)" TR="N=4102" />
line5
<notheig>

$ awk -f value.awk v.test
Microsoft Windows XP Professional Service Pack 2 (build 2600) (5.1.2600)
Microsoft Windows yP Professional Service Pack 2 (build 2600) (5.1.2600)

Last edited by Franklin52; 08-15-2009 at 06:39 PM.. Reason: Please use code tags!
# 5  
Old 08-15-2009
jp2542a Smilie

To keep the forums high quality for all users, please take the time to format your posts correctly.
  1. Use Code Tags when you post any code or data samples so others can easily read your code.
    You can easily do this by highlighting your code and then clicking on the # in the editing menu. (You can also type code tags [code] and [/code] by hand.)
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    Selective use of color to highlight a single word or phrase can be useful at times, but using color, in general, makes the forums harder to read, especially bright colors like red.
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Reply With Quote
# 6  
Old 08-16-2009
danmero,

I not understanding where I went wrong with my post.. please explain the specific error so I don't do it again.

Thanks..
# 7  
Old 08-16-2009
Check your last post !
Quote:
Last edited by Franklin52; 6 Hours Ago at 05:39 PM.. Reason: Please use code tags!
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