Shell Programming and Scripting

 
 func_grep()
{
getstr "Search command: " cmdstr
search_cmd=`echo $cmdstr | awk '{ print $1 }'`
 expandstr "$cmdstr" /* expandstr assigns v1_file. This part is working
cmd_opt=`echo $cmdstr | awk 'NF > 3 { print $2 }'`
search_key=`echo $cmdstr | awk '{ print $(NF-1)}'`
chk_str $v1_file /*checks for '../'
if [ $? -eq "0" ]
then
      if [ -d $v1_file ]  # if input is directory then append "*" to
      then                # search for entire directory
             v1_file="$v1_file/*"
      fi
      $search_cmd $cmd_opt $search_key $v1_file > /ercs/ercs000/reports/grep_$LOGNAME
  
 case $? in
             0) echo "\nThe grep output file: /ercs/ercs000/reports/grep_$LOG
             NAME has been created." ;;
             1) echo "\n\tNo matches were found." ;;
             *) echo "\n\tSyntax  errors  or  inaccessible  files."
                echo "\t$search_cmd $search_key $v1_file"
                return 1 ;
 esac
}

v1_file=`echo $1 | awk '{ print $NF }`

$search_key (/path/file1 /path/file2 /path/file3 etc)

chk_str()
    23  {
    24  if [ -f "$1" -o -d "$1" ]
    25  then
    26      return 0
    27  else
    28      echo "\n\tAccess to this file/directory is not allowed."
    29      return 1
    30  fi
    31  }
  
 expandstr()
    47  {
    48  v1_file=`echo $1 | awk '{ print $NF }`
    49  cmd_opt=`echo $1 | awk 'NF > 1 { print $1 }'`
    50  v1_file=`trim_str $v1_file`
    51  if [ "$v1_file" = "/etc/passwd" -o "$v1_file" = "/etc/ftp.allow" ]
    52  then
    53      return
    54  elif [ "$v1_file" = "${v1_file#/ercs}" ]
    55  then
    56      v1_file=$TopDir/$v1_file
    57  fi
    58  }
  
 trim_str()
    15  {
    16  echo $1 | sed 's/\.\.\///g'
    17  }

read cmdstr cmd_opt search_key

if chk_str "$arg"
then
...
else
...
fi

func_grep() {
        read cmdstr cmd_opt search_key # Read arguments from keyboard, separated by space

        check_str "$cmdstr" || return 1 # Return immediately on error

        expandstr "$cmdstr"

        [ -d "$v1_file" ] && v1_file="$v1_file/*" # Expand dir

        # $v1_file can't be quoted for * to work, everything else should be quoted.
        "$search_cmd" "$cmd_opt" "$search_key" $v1_file > "/ercs/ercs000/reports/grep_$LOGNAME"

        case $? in
                0) printf "\n%s\n" "The grep output file: /ercs/ercs000/reports/grep_$LOGNAME has been created." ;;
                1) printf "\n\t%s\n" "No matches were found." ;;
                *) printf "\n\t%s\n" "Syntax  errors  or  inaccessible  files."
                        printf "\t%s\n" "$search_cmd $search_key $v1_file"
                        return 1 ;
        esac
}