UNIX for Dummies Questions & Answers

hi all....

I'm a newbie to Shell scripting and am trying to make a simple script that can unpack a variety of .tgz , .zip, .tar or .tar.gz archives to the a current directory

i want the script to create a folder equivalent to the base name of the archive and then move the archive to a subdirectory named archive_store

so far i have done the following:

__________________________________

#!/bin/sh

for I in *.tar.gz;
do
A=`basename $I .tar.gz`
mkdir $A
cd $A
gunzip -c ../$I | tar xf -
cd..
done

_____________________________________

Need some help to expand this script to handle the other formats....

Thank you in advance and any help would be greatly appreciated.

Sounds like a case statement. For each file type, assign the commands to use to a set of variables, and then in the main program, simply do what those variables say. Start by refactoring the script you already have, then add more cases. You could start with an easy one like .tgz

Code:

untgz () {
  gunzip -c <"$1" | tar xf -
}

for l in "$@"; do  # invoke this on a bunch of named files
  case $l in *.tar.gz) ext=".tar.gz"; command=untgz;; esac
  :
  A=`basename "$1" "$ext"`
  :
  $command "$1"
  cd ..
done

thanks for your help era... will give it ago and post back...

was able to expand the script using the example as follows... although am unable to make it run... have changed rights of file "chmod 755 filename" and typed "./filename" but there is no result

________________________________
#!/bin/sh

untargz () {
gunzip -c <"$1" | tar xf -
}

untgz () {
gunzip -c <"$1" | tar xf -
}

unzip () {
unzip "$1"
}


for l in "$@";

do

case $l in

*.tar.gz) ext=".tar.gz"; command=untargz

;;

*.tgz) ext=".tgz"; command=untgz
;;

*.zip) ext=".zip"; command=unzip

esac

:
A=`basename "$1" "$ext"`
:
$command "$1"
cd ..

done
________________________________________________

If anyone could suggest how to improve this script in any way and what i might be doing wrong when trying to make it run it would be much appreciated

Thanks once again

The : are where you are supposed to use your imagination and/or the code you already wrote. (Sorry for not making that clear.) As it is now, the script simply does basically nothing. Also note the comment which says you invoke it on the files you want to unpack.

No need to have two identical functions, you can use the same function for tar.gz and tgz; and there is no need to write a function for unzip, since you can just say command=unzip and have it use the unzip command you already have on your computer (oh, and take care not to create a recursive function which invokes itself!)

I seem to have mixed up $1 (dollar one) and $l (dollar ell). Inside the function you want the $1 (one) but in the for loop, the file you are currently processing is $l (ell).

okay thanks again era will give it another go... kind of going in circles because there is so much that i dont know.... will try recode in simpler form

Okay so i have got it down to this.... now i am completely lost...

i know that i have to add a few more lines of code on how the files will be handled once uncompressed. ie : mkdir, name=basename. Just unsure of where to start

sorry if im being really draining but i dont know how to structure the last part.....



#!/bin/sh

for file in "$@"
do
case $file in

*.zip|*.ZIP)
unzip "$file"
;;

*.tar)
tar xvpf "$file"
;;

*.tgz|*tar.gz|*.tar.Z)
gunzip -c "$file" | tar xvpf -
;;


esac
done