It looks to me like each "line" ends with either KEY or CERT, and none of the filenames include space characters. Assuming that is true, and that you have/can get the "Garbled Output" into a single string, split could work: 
@filenames = split /\s.*?(?:KEY|CERT)/, $garbled_output;

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The regex is: 
   /s   whitespace
   .*?  any character (.), unlimited length (*), as few as possible (?
+)
   (?:  non-capturing group
   KEY  literal
   |    OR
   CERT literal
   )    end group

[download]

In reply to Re: Fetch the regex matched values from file and write it to a file in line by line format.(Using HPNA to execute the script) by keszler
in thread Fetch the regex matched values from file and write it to a file in line by line format.(Using HPNA to execute the script) by bks

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