Shell – Deleting parentheses in shell script

I am not quite sure what you're trying to do. Using your first input file, I create this output:

LUNName=mysql05-dbdat02|CollectionStartTime=2012-09-20T15:43:03-04:00|CollectionEndTime=2012-09-20T15:43:34-04:00|Capacity|CurrentCapacity=512|IOOperations|Reads=100|Writes=0|ReadsPerSecond=0.000000|WritesPerSecond=0.000000|ReadMBPerSecond=0.000|WriteMBPerSecond=0.000|TotalMBPerSecond=0.000|NonOptimizedIOPerSecond=0.000000|CacheHitPercentage=0.000|PerformanceMetrics|TotalIOsPerSecond=0.000|ReadIOsPerSecond=0.000|WriteIOsPerSecond=0.000|TotalMBPerSecond=0.000|ReadMBPerSecond=0.000|WriteMBPerSecond=0.000|Performance|

With this perl one liner:

perl -pe 's/\n/|/;s/\s*//g; s/:/=/; END{print "\n"}' file

You could also do it with this:

sed -r 's/\s*//g; s/:/=/;' file | tr '\n' '|'

$ sed ':again;$!N;$!b again; s/{[^}]*}//g' file
This is 
that wants
 anyway.

Explanation:

• :again;$!N;$!b again;

  This reads the whole file into the pattern space.

  :again is a label. N reads in the next line. $!b again branches back to the again label on the condition that this is not the last line.

• s/{[^}]*}//g

  This removes all expressions in braces.

On Mac OSX, try:

sed -e ':again' -e N -e '$!b again' -e 's/{[^}]*}//g' file

Nested Braces

Let's take this as a test file with lots of nested braces:

a{b{c}d}e
1{2
}3{
}
5

Here is a modification to handle nested braces:

$ sed ':again;$!N;$!b again; :b; s/{[^{}]*}//g; t b' file2
ae
13
5

Explanation:

• :again;$!N;$!b again

  This is the same as before: it reads in the whole file.

• :b

  This defines a label b.

• s/{[^{}]*}//g

  This removes text in braces as long as the text contains no inner braces.

• t b

  If the above substitute command resulted in a change, jump back to label b. In this way, the substitute command is repeated until all brace-groups are removed.