[SOLVED] shell script help: copying directory list into an array and then accessing the array

richman1234 · 07-22-2010, 12:19 PM

What I'm trying to do:
write a script that will list all the directories in a given location. Ask the user to enter a number corresponding to the location of the directory in the list, and then moving into that directory.

I have written a script to do this, but it only works when I run it as:
<user>$program_name
and the script runs in a sub-shell. But, when it is run in a sub-shell, the changes made by the script go away after the script ends.

When I run it as:
<user>$. program_name
and the script runs in the current source shell, I get an error:
bash: cd: /home/dev/Project/dirname: No such file of directory

does anyone have any ideas how to get this done??

Code:

IFS='
' read -d '' -a ArrName < <(ls ~/Projects)
read filenumber
cd $HOME/Projects/${ArrName[$filenumber]}

grail · 07-23-2010, 01:09 AM

Maybe have a look at select

lsn726 · 07-23-2010, 03:56 AM

# assume $1 is the path of your target directory
filelist=$(find $1 -type d)
for filename in $filelist
do
echo $filename
# do whatever you want
done

murugesan · 07-23-2010, 04:17 AM

Example code:

Code:

filenumber=1
ArrName[0]=""
        ls > ./delete.txt
        while [ 1 ]
        do
                ArrName[$filenumber]=`head -n $filenumber ./delete.txt| tail -n 1`
                if [ "${ArrName[$filenumber]}" = "${ArrName[`expr $filenumber - 1`]}" ]
                then
                        break
                fi
                echo $filenumber:${ArrName[$filenumber]}
                filenumber=$(( $filenumber + 1 ))
        done
        comeout=$filenumber
        echo $comeout:To come out of this script
        while [ 1 ]
        do
                echo Enter any number:
                read changeDirNum
                echo $changeDirNum | egrep "^[0-9]*$" | egrep -v "^0$" > /dev/null
                if [ $? -eq 0 ]
                then
                        if [ $changeDirNum -lt $filenumber ]
                        then
                                if [ -d ${ArrName[$changeDirNum]} ]
                                then
                                        cd ${ArrName[$changeDirNum]}
                                        break;
                                else
                                        echo ${ArrName[$changeDirNum]} is not a directory
                                fi
                        else
                                if [ $changeDirNum -eq $comeout ]
                                then
                                        return 0 ;
                                fi
                                echo Enter correct Number:
                        fi
                else
                        echo Enter correct Number:
                fi
        done
        rm -f ./delete.txt

If your having them in a file mychd.sh(with execute permission)
You need to execute that as:
$

Code:

. mychd.sh

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Andrew Benton · 07-23-2010, 05:32 AM

Code:

#!/bin/bash
set -e

ArrName=($(ls ~/Projects))
read filenumber
cd ~/Projects/${ArrName[$filenumber]}

richman1234 · 07-23-2010, 10:05 AM

Thanks you all for your input. None of your code worked, that's how I found the problem. I noticed that when I got the error:
" /home/fedora-dev/Projects/<dirname> not found"
the path was in white txt, and the <dirname> was in blue. I had an alias set up in my .bashrc file 'alias ls='ls -B --color=always'

When I changed the alias to "alias ls='ls -B --color=never'" Your code worked!!!

So, I went back to what I originally had and for the ls command I set the color to never, and it worked also. Interesting!?!

Thanks,
Rich

murugesan · 07-25-2010, 11:19 PM

I used to use the following here whenever I used to logon to any linux oriented terminal (including cygwin)

alias ls > /dev/null 2>&1
if [ $? -eq 0 ]
then
unalias ls
fi