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sed: parsing tnsnames.ora

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# 1  
Old 10-19-2010
sed: parsing tnsnames.ora
All:

Can sombodoy help me out with a sed command? Assume I have the following:
Code:
PRI =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.3.7)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = pri)
      (INSTANCE_NAME = pri)
    )
  )

STDBY =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.3.5)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = stdby)
      (INSTANCE_NAME = stdby)
    )
  )


AIXSNAP =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.9.0.5)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = aixsnap)
      (INSTANCE_NAME = aixsnap)
    )
  )


I would like to get the line right above (DESCRIPTION. Keep in mind that there may or may not be spaces between the '(' and the word DESCRIPTION. So valid examples can be something like this:
Code:
 
(DESCRIPTION= 
( DESCRIPTION= 
(DESCRIPTION  = 
(    DESCRIPTION =

The output I am looking for should be like this
Code:
 
 PRI
 STDBY
 AIXSNAP

Thanks in advance to all who help!!!
Last edited by Scott; 10-19-2010 at 03:13 PM.. Reason: Code tags, please...
# 2  
Old 10-19-2010
Code:
$ awk -F"[ =]" '/DESCRIPTION/ { print X }{ X=$1 }' tnsnames.ora
PRI
STDBY
AIXSNAP

This User Gave Thanks to Scott For This Post:
BeefStu
# 3  
Old 10-19-2010
Code:
$ awk '!/^\(/ && $2== "=" {print $1}' file
PRI
STDBY
AIXSNAP

# 4  
Old 10-19-2010
Code:
sed -n -e "/DESCRIPTION/{g;s/ .*=.*//p;}" -e "h" file

This User Gave Thanks to anbu23 For This Post:
elcaro
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