UNIX for Dummies Questions & Answers

Hi All,

I am trying to extract lines bsed on pattern matching../mp straight-flow/
Extracted output should be saved in meta_string , but the code is not working in that manner,saving repeated lines. can anyone please suggest where am i going wrong.


/mp straight-flow/ {
start=index($0,"straight-flow");
if ($2=="straight-flow") meta_string=(meta_string "\n" substr($0,start));
print(meta_string);

mp straight-flow Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Counts.Flow_24 Transformation_records_to_fit_CO
BOL_Requirement.Generate_DAG_Counts.Repl_Produce_3_flows.out Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Cou
nts.Rlup_Count_DAG_Occurence.in -metadata metadata4
mp straight-flow Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Counts.Flow_25 Transformation_records_to_fit_CO
BOL_Requirement.Generate_DAG_Counts.Repl_Produce_3_flows.out Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Cou
nts.Jn_Add_DAG_Count_to_Incoming_Records.in.in0 -metadata metadata4 -buffer
mp straight-flow Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Counts.Flow_23 Transformation_records_to_fit_CO
BOL_Requirement.Generate_DAG_Counts.Rlup_Count_DAG_Occurence.out Transformation_records_to_fit_COBOL_Requirement.Generate_DAG
_Counts.Jn_Add_DAG_Count_to_Incoming_Records.in.in1 -metadata metadata5 -buffer


Regards,
Madhavi

Code:

awk '{
         if ($0 ~ /mp straight-flow/) 
         {
            start=index($0,"straight-flow");
            if ($2=="straight-flow") 
            {
               meta_string=sprintf ("%s\n%%s",meta_string,substr($0,start)) 
            }
          } 
         }
         END {print meta_string} ' inputfile

assuming you meant awk - however your output would be the same if just printed the substring from each line. Why do you want all the lines in meta_string?

Thanks for your response.

I want to extract all these lines which contains /mp straight-flow/ into an aray and have to search a specific pattern .
example:
Search the pattern "Rlup_Count_DAG_Occurence.in " in the array of extracted lines.

This example shows how you can store the lines in an array. The for loop in the END section loops through the array and prints the lines that match the pattern.

Code:

awk -v pattern="Rlup_Count_DAG_Occurence.in" '
/mp straight-flow/{sub("mp ","");arr[++i]=$0}
END{for(i in arr){if(match(arr[i],pattern){print arr[i]}}}' file

Regards

Thanks for your reply

its not working..

but i will take the pattern from another array and search in the extracted lines array. the pattern is not hard coded.if it matches i want to pickup the corresponding metadata field.

ex: mp straight-flow Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Counts.Flow_25 Transformation_records_to_fit_CO
BOL_Requirement.Generate_DAG_Counts.Repl_Produce_3_flows.out Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Cou
nts.Jn_Add_DAG_Count_to_Incoming_Records.in.in0 -metadata metadata4 -buffer
mp straight-flow Transformation_records_to_fit_COBOL_Requirement.Generate_DAG_Counts.Flow_23 Transformation_records_to_fit_CO
BOL_Requirement.Generate_DAG_Counts.Rlup_Count_DAG_Occurence.out Transformation_records_to_fit_COBOL_Requirement.Generate_DAG
_Counts.Jn_Add_DAG_Count_to_Incoming_Records.in.in1 -metadata metadata5 -buffer

when i save these lines in array need to search one pattern like "Jn_Add_DAG_Count_to_Incoming_Records" this not contains .in or .out at the end of the pattern and need to pick up metadat4 for .in and metadata5 for .in1

please help me out..this is the first time i am working on awk..
seraching pattern saving the lines into an array and search some other pattern in the saved array , if it matches in the array the corresponding another pattern need to be saved ....
.....its very difficult to me to do this starting itself..

please ...

Limit the search pattern to:

Code:

Rlup_Count_DAG_Occurence

Hi ,

I m facing one problem with String usage in AWK . let me put what i need .

i have a function and there i used one string ( meta_string)

function 1 {
...................
...................
meta_string = " this string got some value of 500 characters";
..........
......... }

Now i want to use meta_string value in another function say function 2.

function 2 {

print(meta_string);
...............
.............. };

Now problem is in using meta_string in fucntion 2 when i try printing meta_string its printing empty string .

could you please carify how to use meta_string in function 2 or any is there any other way to handle this sproblem.

Note: As i m using AWK first time :-)

Thanks in advance for your help.