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Top Forums UNIX for Dummies Questions & Answers Help with deleting some parts from text file Post 302650355 by newboy on Saturday 2nd of June 2012 01:38:01 PM
Old 06-02-2012
Quote:
Originally Posted by jawsnnn
If you don't want to rely on properly formatted code, here is a script that keeps track of left and right parentheses counts to do this

Code:
#!/bin/ksh
count_prev=0
count=0
mask=false
while read line
do
  if [ `echo $line | grep -cw HOME` -eq 1 ]; then
    mask=true
    count_l=0
    count_r=0
    count=0
  fi  
  let count_l=count_l+`echo $line | grep -c '('`
  let count_r=count_r+`echo $line | grep -c ')'`
  count=$(expr $count_l - $count_r)
  if [ $mask == "false" ]; then
    echo $line
  elif [ $count_prev -eq 0 -a $count -eq 0 ]; then
    echo $line
    mask=false
  fi  
  count_prev=$count
done < in_file

wow, i will test this and come back. Thanx a lot Smilie
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.10 3 Aug 1994 echo(1B)
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