I'm stuck.. how to do this in a loop or otherwise? 3

[RFC1795]

Hi all,

I've hit a blank and am not sure how to get around this. (Let alone explain it properly ;-) … I’ll try my best)
I tried searching the forums but found nothing that seems to match what I’m wanting to do.

It’s like this. I have a bunch of directories which I want to ls -lt on and awk the 9th column into a file. This will leave me with a column list which I need to use as a source for another script.
Eg:
ls -lt | awk ‘{print $9}’ > dirlist.txt

dirlist.txt will contain only the directory names then, like so:
directory1
directory2
directory3
directory4
directory5
directory6
directory7
directory8
directory9
directory10

Now I have another file which lists a number of these directory names which I’d like to have excluded or preferably marked with a hash.
Eg:
So the excludefile.txt will contain
directory6
directory8
directory10

So ideally what I’d like to have is the dirlist.txt (or another if a new one needs to be created) looking something like this:

directory1
directory2
directory3
directory4
directory5
# directory6
directory7
# directory8
directory9
# directory10

I’ve tried doing the above with a for loop and sed but I think I’m heading down the wrong route and complicating things.

Anyone have any ideas I should consider or a simple way to do the above?

Thanks … T

 

[PHV]

something like this ?
awk 'NR==FNR{e[$1];next}{print (($1 in e) ? "# " : "") $1}' excludefile.txt dirlist.txt > newlist.txt

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[feherke]

Hi

ls -lt | awk 'FNR==NR{e[$0]=1;next}{print (e[$8]?"# ":"")$8}' excludefile.txt -

Tested with [tt]gawk[/tt] and [tt]mawk[/tt].

Feherke.

http://rootshell.be/~feherke/

 

[RFC1795]

Hi,

Thanks for the prompt replies.

I had a few problems getting it to work, but then tried nawk. Instant results!! Thank you both kindly...

Small modifications to get Feherke's one to do similar to PHV's ... you're both too clever :-D

BTW, this was with awk running on SunOS

Cheers... T

 

[feherke]

Hi

Oops. You answered my unasked question. In my code I used $8, because my poor [tt]ls[/tt] outputed only eight columns. Then, as usally, I forgot to mention it.

Feherke.

http://rootshell.be/~feherke/

 

[KarveR]

ls -lt|awk '{print $9}'|grep -f excludefile.txt -v > dirlist.txt

outputs the items not in the excluded list, just to add an answer for the unpreferred solution


______________________________________________________________________
There's no present like the time, they say. - Henry's Cat.

 

[RFC1795]

Thanks KarveR ... that's also pretty clever. Nice and clean too. I'll definitely take that one home and freeze it

Cheers... T

 

[doublea1535]

I figured I'd work this one out before checking the other posted solutions. I know BASH better than AWK so i'ts quite a bit longer . Not sure why you are wanting 'ls -lt' as that lists files as well as directories, plus more columns than just the name.

#!/bin/bash
dirPath=${1:-~}
allDirs=`ls -F $dirPath | grep / | sed "s./.."`
newDirs=directoryList.txt
excludeList=`cat excludeFile.txt`
mark=0
for dir in $allDirs; do
        for X in $excludeList; do
                if [ "$dir" == "$X" ]; then
                        mark=1
                fi
        done

        if [ $mark == 1 ]; then
                echo "# $dir" >> $newDirs
        elif [ $mark == 0 ]; then
                echo "$dir" >> $newDirs
        fi

        mark=0
done