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Top Forums Shell Programming and Scripting awk/sed string search and replace Post 302528626 by Shell_Life on Tuesday 7th of June 2011 02:17:32 PM
Old 06-07-2011
There are several questions that can be asked and many scenarios that can be created based on your description.

In any event, not to get too complicated, here is one possible solution based exactly on your sample data:
Code:
!/usr/bin/ksh
typeset -i mCount
while read mLine
do
  mCount=$(echo ${mLine} | egrep -c 'tropical forest')
  if [[ ${mCount} -ne 0 ]]; then
    mFlag='Y'
  fi
  if [[ "${mFlag}" = "Y" ]]; then
    if [[ "${mLine}" = "" ]]; then
      mFlag='N'
    else
      mCount=$(echo ${mLine} | egrep -c 'wed')
      if [[ ${mCount} -ne 0 ]]; then
        echo '#'${mLine}
        echo 'on mon tue wed they would eat berries'
        mFlag='N'
        continue
      fi
    fi
  fi
  echo ${mLine}
done < input_file

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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 5.11 3 Aug 1994 echo(1B)
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