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Elizabeth H
Elizabeth H
Last Activity: Nov 5 '12, 10:44 PM
Joined: Jan 18 '11
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  • Elizabeth H
    started a topic grep multiple commands
    in Perl

    grep multiple commands

    Hi

    Below is what I am trying to do. I have a variable which contains a list of commands seperated by ":". While trying to use a for loop to get each command, it doesnt retrun the correct results

    Example:

    Code:
    var="command -1:command -2*: command something*"
for c in `echo $var | tr ':' ' '`
do
  echo $c
done

Instead of getting the below
command
    ...
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    Last edited by zmbd; Nov 5 '12, 08:08 PM. Reason: [Z(Please use the <CODE/> button to format your code)]
    • Elizabeth H
      started a topic How to grep from multiple files given one of those files dont exist
      in Perl

      How to grep from multiple files given one of those files dont exist

      I am trying to grep for a particular word from two files like below. I need to find the word in one of the two files

      grep "myWord" file1 file2 && echo 1 or echo 0

      The issue is that I have to search in both the files, but sometimes one of these files doesnt exist. So even when the word is present in one of the files it stil returns a 0.
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      • Elizabeth H
        started a topic how to grep for an IP address
        in Perl

        how to grep for an IP address

        I wanted to grep the IP address from this following exception. What is the easiest way to do this?

        "var=something. something.somth ing.Exception : The IP xx.xxx.x.xxx cannot be used"


        I want to grep the IP address from this string and store it in a different variable. Do i just use the regular regex pattern to grep an IP address or is there an easy way
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        • Elizabeth H
          replied to Adding a new line after a pattern match
          in Perl
          Hi again

          I think I was able to figure out how to do it. But I came across a problem.This is what I tried
          sed -i -e '/^ # abcd/,/^ ## }}}$/s/ ## }}}/ $insert\n ## }}}/'
          If I use some string like "STRING" instead of the insert variable, it works perfectly fine. But when I try insert="for ....do...done" and try it with $insert it doesnt get substitued with the value of insert. I tried several different...
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          • Elizabeth H
            started a topic Adding a new line after a pattern match
            in Perl

            Adding a new line after a pattern match

            Hi,

            I have a question regarding adding lines basically using sed after a pattern match. My code would look like

            Several lines in the file
            # abcd ##{{{
            variable 1
            variable 2
            variable 3
            .
            .
            .
            ## }}}

            And I need to add a for loop just before the 'abcd' fold closes and my new code shud look like
            Several lines in the file
            # abcd ...
            See more | Go to post
            • Elizabeth H
              replied to parse for a function definition
              in Perl
              @ROVF: I was told that perl might be a good way to do this...Since i dnt speak Perl much, it takes me more time to implement even the basic things, but you had got it right...I guess I was thinking it a bit too complex...Thnks again for ya quick responses and ya help
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              • Elizabeth H
                replied to parse for a function definition
                in Perl
                Thnks alot..it wrks wellll....I dnt speak Perl much..so not much sure on how to modify.. can I have it in way where I can use this .pl file to call different files..and apply the same changes to all files(ie, parse out the specific fn in all files and add a trailing statement to all)? Again thnks for ya help!
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                • Elizabeth H
                  replied to parse for a function definition
                  in Perl
                  Thanks for the quick response. Like you had mentioned above, function braces are only in column 1, and the other braces are not in column 1 but not sure how to do the search I need to insert a new statement just before the closing curly brace of the function. Is function parsing the best way to do this or do I have any other option?
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                  • Elizabeth H
                    replied to parse for a function definition
                    in Perl
                    Will you be able to still help me with the above question. I am still not able to parse the function correctly
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                    • Elizabeth H
                      replied to parse for a function definition
                      in Perl
                      I tried what @rabbit mentioned , but didnt work. Guess it was coz I said the function doesnt have any braces inside it.
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                      • Elizabeth H
                        replied to parse for a function definition
                        in Perl
                        I am sorry but it does have some braces inside the function.. so I dont know how to parse until the end of function
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                        • Elizabeth H
                          started a topic parse for a function definition
                          in Perl

                          parse for a function definition

                          I need to search for a particular function in a shell script and replace it with the modified function for which I can use sed inplace editor. But I am not able to correctly parse for the function. Can I have a regular expression to search for the function which is of the form
                          function()
                          {
                          no other braces in between
                          }
                          See more | Go to post
                          • Elizabeth H
                            replied to How to search and replace string using perl?
                            in Perl
                            Can I have some more clue on this as the function itself has several small blocks of statements with closing curly braces which makes it hard for me to parse exactly till end of function where I need to put my two variables
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                            • Elizabeth H
                              replied to How to search and replace string using perl?
                              in Perl
                              Thanks..lemme try
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                              • Elizabeth H
                                replied to How to search and replace string using perl?
                                in Perl
                                I also had another question. In the same scenario above, how do I set two variables VAR1 and VAR2(both used in function1) to blank at the end of function1(). Do i need to write a small script or if there is a one liner which can search for function1() and set those variables to blank at the end of the function. Thanks
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                                • Elizabeth H
                                  replied to How to search and replace string using perl?
                                  in Perl
                                  Thanks a lot! :)
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                                  • Elizabeth H
                                    replied to How to search and replace string using perl?
                                    in Perl
                                    Thnks again...Could you please explain what it does..I especially the 1 and 2
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                                    • Elizabeth H
                                      replied to How to search and replace string using perl?
                                      in Perl
                                      That was such a great answer and worked really really well...Thankss a bunch..I have one more issue....In the above same problem..How do I insert the new string "ggg" exactly after the string "ccc" or so...is there a position based substitution?
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                                      • Elizabeth H
                                        started a topic How to search and replace string using perl?
                                        in Perl

                                        How to search and replace string using perl?

                                        Hi,

                                        I had a few questions regarding searching for a string and replacing it using perl scripts. I have 100's of files written in Unix shell scripts and I need to edit them all. Its like
                                        Code:
                                        function1()
{ 
         variable=xxx
}
 
function 2()
{
         variable='aaa bbb ccc ddd'
}
                                        I have to search exactly for function 2 and only replace the variable in function...
                                        See more | Go to post
                                        Last edited by numberwhun; Jan 21 '11, 03:40 PM. Reason: Please use code tags!
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