Shell Programming and Scripting

    ABCD   DEFG5 42.0.1-63.38.31 
       KKKK  iokl     IP Connection Available
   

    ABCD    DEFG5 42.0.1-63.38.31 
       SYSTEM        INFO    REPT COND: system alive
                 88899   POIREe QWERT POIEFVGH

   ABCD   DEFG5 42.0.1-63.38.31 
      SLK A   FFFFFF REPT-LINK-CGST: threshold level 0 to 1
                 SC=00   LLI=mmmmm                 CLASS=SL
              
   
    ABCD   DEFG5  42.0.1-63.38.31 
       IP7CONN ooooooo     Retrans
   
   ABCD   DEFG5 42.0.1-63.38.31 
        SLK A   FFFFFF RCVRY-LINK-CGST: threshold has cleared
                 SC=00   LLI=mmmmm                 CLASS=SL
                 
    ABCD  DEFG5 42.0.1-63.38.31 
       SLK  A   pcnbod     REPT-LINK-CGST: threshold level 0 to 1
                 SC=01   LLI=pcnbod                     CLASS=VL
                 
    ABCD   DEFG5  42.0.1-63.38.31 
           IP7CONN ooooooo     Retrans

    
    ABCD  DEFG5 42.0.1-63.38.31 
        SLK  A   pcnbod     RCVRY-LINK-CGST: threshold has cleared
                 SC=01   LLI=pcnbod                     CLASS=VL

        ABCD   DEFG5 42.0.1-63.38.31        SLK A   FFFFFF REPT-LINK-CGST: threshold level 0 to 1                  SC=00   LLI=mmmmm                 CLASS=SL
                     
        ABCD   DEFG5 42.0.1-63.38.31          SLK A   FFFFFF RCVRY-LINK-CGST: threshold has cleared                  SC=00   LLI=mmmmm                 CLASS=SL                  
        
        ABCD  DEFG5 42.0.1-63.38.31         SLK  A   pcnbod     REPT-LINK-CGST: threshold level 0 to 1                  SC=01   LLI=pcnbod                     CLASS=VL
                     
        ABCD  DEFG5 42.0.1-63.38.31          SLK  A   pcnbod     RCVRY-LINK-CGST: threshold has cleared                  SC=01   LLI=pcnbod                     CLASS=VL

nawk '/threshold/{print kar ;print $0;getline;print }{kar=$0}' filename |  nawk '{if (NR % 3) printf("%s", $0); else printf(" %s\n", $0)}' 

awk '/threshold/{y=$0;getline; print x,y,$0;next;}{x=$0;}' file

 
awk 'BEGIN {RS=""}
/threshold/ { gsub(/\n/," ") ; print}' filename

#!/usr/bin/env bash

# @(#) s1	Demonstrate extract +-1, combine,

# Section 1, setup, pre-solution.
# Infrastructure details, environment, commands for forum posts. 
# Uncomment export command to run script as external user.
# export PATH="/usr/local/bin:/usr/bin:/bin"
set +o nounset
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe ; pe "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
pe "(Versions displayed with local utility \"version\")"
c=$( ps | grep $$ | awk '{print $NF}' )
version >/dev/null 2>&1 && s=$(_eat $0 $1) || s=""
[ "$c" = "$s" ] && p="$s" || p="$c"
version >/dev/null 2>&1 && version "=o" $p printf specimen grep paste sed
set -o nounset
pe

FILE=${1-data1}

# Display sample of data file, with head & tail as a last resort.
pe " || start [ first:middle:last ]"
specimen $FILE \
|| { pe "(head/tail)"; head -n 5 $FILE; pe " ||"; tail -n 5 $FILE; }
pe " || end"

# Section 2, solution.
pl " Results:"
grep -A1 -B1 'threshold' $FILE |
tee f1 |
grep -v '^--$' |
tee f2 |
paste -d" " - - - |
tee f3 |
sed 's/$/\n/' |
tee t1

# Section 3, post-solution, check results, clean-up, etc.
n1=$(wc -l <expected-output.txt)
n2=$(wc -l < t1)
pl " Comparison of $n2 created lines with $n1 lines of desired results:"
if [ ! -f expected-output.txt -o ! -s expected-output.txt ]
then
  pe " Comparison file \"expected-output.txt\" zero-length or missing."
  exit
fi
if cmp expected-output.txt t1
then
  pe " Passed -- files have same content."
else
  pe " Failed -- files not identical -- detailed comparison follows."
  if diff -B -b expected-output.txt t1
  then
    pe " Passed by ignoring whitespace differences."
  fi
fi

exit 0

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
GNU bash 3.2.39
printf - is a shell builtin [bash]
specimen (local) 1.17
GNU grep 2.5.3
paste (GNU coreutils) 6.10
GNU sed version 4.1.5

 || start [ first:middle:last ]
Edges: 5:0:5 of 32 lines in file "data1"

ABCD DEFG5 42.0.1-63.38.31
KKKK iokl IP Connection Available


   ---


ABCD DEFG5 42.0.1-63.38.31
SLK A pcnbod RCVRY-LINK-CGST: threshold has cleared
SC=01 LLI=pcnbod CLASS=VL
 || end

-----
 Results:
ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF REPT-LINK-CGST: threshold level 0 to 1 SC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF RCVRY-LINK-CGST: threshold has cleared SC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod REPT-LINK-CGST: threshold level 0 to 1 SC=01 LLI=pcnbod CLASS=VL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod RCVRY-LINK-CGST: threshold has cleared SC=01 LLI=pcnbod CLASS=VL


-----
 Comparison of 8 created lines with 7 lines of desired results:
cmp: EOF on expected-output.txt
 Failed -- files not identical -- detailed comparison follows.
 Passed by ignoring whitespace differences.

$ perl -00 -lne '/threshold/ && s/\n//g && print' testfile
ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF REPT-LINK-CGST: threshold level 0 to 1SC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A FFFFFF RCVRY-LINK-CGST: threshold has clearedSC=00 LLI=mmmmm CLASS=SL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod REPT-LINK-CGST: threshold level 0 to 1SC=01 LLI=pcnbod CLASS=VL

ABCD DEFG5 42.0.1-63.38.31 SLK A pcnbod RCVRY-LINK-CGST: threshold has clearedSC=01 LLI=pcnbod CLASS=VL