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Top Forums Shell Programming and Scripting ...yet another string of awk/sed questions from a RegExp-Challenged luser %-\ Post 302358530 by SteveB-in-LV on Friday 2nd of October 2009 10:23:46 PM
Old 10-02-2009
Hello again, Scrutinizer.

...I'll apologize in advance for having defaced your code; My script-foo is no match for yours so I've dumbed it down a bit. Smilie

...what can I say...I've got a lot to learn.

...anyway, below is what I've got right now. This runs fairly well but stumbles at at least one point on our live routing tables.

Sometimes there are multiple equal-cost paths to a particular network so what this means in terms of processing the routing table with this script is, there may be several lines in a row which begin with a "[" and need to be joined to the line above them iteratively.

I imagine this means I need something like a WHILE loop for Step 3. to ensure I've joined all the "[" lines before moving on.

How would you suggest I proceed?

Code:
 
#!/bin/bash
# First Step 2
mergedline=0
{ sed '/^D EX/s/$/\tD EX/;s/^D EX//; 
         /^D/s/$/\tD/;s/^D//; 
         /^C/s/$/\tC/;s/^C//; 
         /^S\*/s/$/\tS\*/;s/^S\*//; 
         /^S/s/$/\tS/;s/^S//; 
         s/^[ \t]*//; 
         /masks/s/^/\n/; 
         /subnets/s/^/\n/' $1 |\
while read line; do
  case $line in
      # Step 3
      \[*) printf "$prevline $line\n"
           mergedline=1
           prevline="" ;;
      # Step 4
      *)   if [[ $mergedline -eq 0 ]]; then
             echo $prevline
      # Step 1
             case $line in
               *subnets*|*masks*) echo ;;
             esac
           fi
           mergedline=0
           prevline=$line  ;;
  esac;
done;
if [[ $mergedline -eq 1 ]]; then
  echo $prevline
fi } | \
while read firstline; do  # Step 5
  while read line; do
    if [ -n "$firstline" ]; then
      echo $firstline
      firstline=""
    fi
    if [ -n "$line" ]; then
      echo $line
    else
      break
    fi
  done|sort -n -t. -k1,1 -k2,2 -k3,3 -k4,4
  echo
done
if  [ -n "$firstline" ]; then
  echo $firstline
fi

 

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RTFM(1) 						      General Commands Manual							   RTFM(1)

NAME
rtfm - a response for easy questions from clueless lusers SYNOPSIS
rtfm [ -p ] [ -h ] [ -d option ] [ -i interval ] [ -a action ] [ -q luser] DESCRIPTION
rtfm is a command for system administrators to use in dealing with new users. rtfm is useful for dealing with users having trouble with their pictures downloaded from alt.binaries.pictures.erotica. rtfm will continue to run until killed by hand, using `kill processid'. rtfm can be invoked by anyone who has enough of a clue to know what a man page is. OPTIONS
-p Give the answer in a polite fashion. -h Tell the clueless luser to go to hell. Used with the -p option, they'll look forward to the trip. -d option Debug mode using option where option is one of the following: query Ask the luser what part of rtfm that he or she does not understand. planet Ask what planet the luser is from. literacy Ask the luser if the luser can read. english Ask the luser if the luser understands English. Mac Ask the luser if the luser has ever used a computer other than a Macintosh. Nintendo Same as the Mac option, but slightly more harsh. -i interval Enable within interval seconds. interval is the time between a luser asking the same damn fool question. This option must be acti- vated for the -a option. It stores the time of the question in /var/run/luser and checks that file each time that rtfm is activated. interval is a number of minutes, of the form xxx.xx where each x is a decimal digit. The default is 5.00 minutes. -a action This defines some action to be taken in the event that the -i flag condition is met. action can be defined either at the flag level or by a file. The options for flags are as follows: scream Let out a scream of utter frustration. hair Rip out your hair in total frustration. rm Automatic command ran in lusers home directory. It can have an addition -rf flag added. ignore Ignore the luser. warn Warn the other sysadmins. forward Forward to CNS advising. Particullary if the complaint is /dev/null is full. kill Kill all the lusers processes. FILE=file.name Use a file to define a course of actions. This can be any executeable file except those using ksh, which no god-fear- ing right-thinking sysadmin would be caught using lest he be struck down by the wrath of God. -q luser Query file /etc/luser to see if luser is a real luser or a first time luser. FILES
/etc/luser SEE ALSO
mr.biff(2), BUGS
rtfm only checks /var/run/luser when the -a option is specified and after the -i option is invoked. Otherwise /tmp would fill up rapidly on many systems. Also, core may dump if the -a FILE= option is anatomically impossible. GNU Utilities July 27, 1997 RTFM(1)
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