Shell Programming and Scripting

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.
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100

1 4 7 ..........so on..............97 100
2 5 8 ........so on................98
3 6 9				   99

z1= z2= z3= 
while :
do
 read l
 z1="$z1 $l"
 read l
 z2="$z1 $l"
 if ( ! read l )
  then
   break
  fi
 z3="$z1 $l"
done < infile
z1="${z1% }"
z2="${z2% }"
echo "${z1# }
${z2# }
${z3# }" >outfile

BEGIN {
  if (!r) r=3
}
{
  i=FNR%r
  a[i]=(i in a)?a[i] OFS $0:$0
}
END {
  for(i=1; i in a;i++)
    print a[i]
  print a[0]
}

$ test1.sh file1
test1.sh[13]: infile: cannot open

$ awk -f zozoo.awk file1 >> file 2
awk: syntax error near line 6
awk: illegal statement near line 6
awk: syntax error near line 9
awk: illegal statement near line 9
awk: syntax error near line 9
awk: illegal statement near line 9
awk: illegal statement near line 13

nawk ' BEGIN {
  if (!r) r=3
}
{
  i=FNR%r
  a[i]=(i in a)?a[i] OFS $0:$0
}
END {
  for(i=1; i in a;i++)
    print a[i]
  print a[0]
} ' file1