Re: easy grep question

From: Barry Finkel (b19141_at_ACHILLES.CTD.ANL.GOV)
Date: 12/22/03

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    Date:         Mon, 22 Dec 2003 10:26:04 -0600
To: aix-l@Princeton.EDU

    >I need to search a file for the string "ABC123" but only if the
    >following line contains either "DEF456" or "GHI789". All three strings
    >occur multiple times within this file, I am only concerned with the
    >instances where the first string is immediately followed by one of the
    >other two.

    What do you want output? This UNTESTED awk script will output the lines
    containing "ABC123" as per above.

    # awk script
    BEGIN{found=0;saved="";}
    {
         if (index($0,"ABC123">0)
         {
              saved = $0;
              found = 1;
              next;
         }
         if (((index($0,"DEF456")>0)||(index($0,"GHI789")>0))&&
             (found==1))
         {
             print saved;
             saved = "";
             found = 0;
         }

    }
    ----------------------------------------------------------------------
    Barry S. Finkel
    Computing and Instrumentation Solutions Division
    Argonne National Laboratory Phone: +1 (630) 252-7277
    9700 South Cass Avenue Facsimile:+1 (630) 252-4601
    Building 222, Room D209 Internet: BSFinkel@anl.gov
    Argonne, IL 60439-4828 IBMMAIL: I1004994

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