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Swapping lines beginning with certain words using sed/awk

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# 1  
Old 08-23-2009
Swapping lines beginning with certain words using sed/awk
I have a large file which reads like this:
Code:
fixed-address 192.168.6.6 {
  hardware ethernet 00:22:64:5b:db:b1;
  host X;
}
fixed-address 192.168.6.7 {
  hardware ethernet 00:22:64:5b:db:b3;
  host Y;
}
fixed-address 192.168.6.8 {
  hardware ethernet 00:22:64:5b:db:b4;
  host A;
}
fixed-address 192.168.6.9 {
  hardware ethernet 00:22:64:5b:db:b6;
  host B;
}

I need the file to read like:
Code:
host X {
  hardware ethernet 00:22:64:5b:db:b1;
  fixed-address 192.168.6.6;
}
host Y {
   hardware ethernet 00:22:64:5b:db:b3;
   fixed-address 192.168.6.7;
 }
host A {
   hardware ethernet 00:22:64:5b:db:b4;
   fixed-address 192.168.6.8;
 }
 host B {
   hardware ethernet 00:22:64:5b:db:b6;
   fixed-address 192.168.6.9;
 }

So there are two things that need to be done:
1. The lines beginning with
Code:
host

need to be swapped with the lines beginning with
Code:
fixed-address

2. The semi-colons at the end of the lines beginning with
Code:
host

shouldn't move up and the curly brackets at the end of the lines beginning with
Code:
fixed-address

shouldn't move either.

Thanks in advance

--
KSK
# 2  
Old 08-23-2009
One solution using awk
Code:
awk '/fixed/{y=$1FS$2;getline;x=$0;getline;sub(";","");sub("^  ","");printf "%s{\n%s\n%s;\n",$0FS,x,FS FS y;next}1' file

# 3  
Old 08-23-2009
Works! Thanks a ton.

I known very little awk and, out of curiosity, I wonder how that command works?
# 4  
Old 08-23-2009
Here some documentation that you should read if you want to understand Smilie
# 5  
Old 08-23-2009
Thanks muchly Smilie
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