shellscript to extract multiple archives

quackyo · 01-13-2008, 05:28 AM

I have a drive with multiple directories on, all of them containing rar files.

I want to batch-decompress them all into the directory the archives are in now. So I want something that finds a rar file, say /home/xx/movie1/file.rar

then do a "unrar x /home/xx/movie1/file.rar /home/xx/movie1/"

Unfortunately I'm not a programmer so I have only thought this through. Can somebody finish this for me?

find -name *.rar (should this be something that allows all cases (i.e. *.Rar *.RAR)) | unrar x "input from find" "input directory"

urka58 · 01-13-2008, 06:18 AM

#!/bin/sh
for i in `ls -1 /path/to/yourdir | grep -i .rar`; do
rar -x $i
done

or

#!/bin/sh
for i in `ls -1 $1 | grep -i .rar`; do
rar -x $i
done

or

#!/bin/sh
find "$1" -name `ls -1 $1 | grep -i .rar` -exec rar -x '{}' \;

for the latters you must specificy the path when you launch the script ie
my untar_script.sh /path/to/yourdir

They should work if your filenames has no white spaces..otherwise things are a little more complicate
Test them first....

ciao

colucix · 01-13-2008, 06:46 AM

Quote:

Originally Posted by urka58

#!/bin/sh
find "$1" -name `ls -1 $1 | grep -i .rar` -exec rar -x '{}' \;

Hmmm... sorry urka58 but I think it does not work in the way the OP was looking for, e.g. it does not extract files in the directory where the archives reside. Keep it simple and do something like this

Code:

for archive in $(find . -iname "*.rar")
do
  path_to_extract=$(dirname $archive)
  unrar e $archive $path_to_extract > /dev/null
done

the test -iname (of the command find) matches entries in a case-insensitive way. The command dirname extract the path from the filename (actually it strips non-directory suffix from the filename). Finally unrar the archive specifying path_to_extract as last argument.

As urka58 correctly suggested, you may encounter problem if file names contain blank spaces. In this case a little workaround is needed.

quackyo · 01-13-2008, 07:09 AM

Thanx, the last one does work fine, but as you said there is problems with blank spaces.. How do I fix that ?

ghostdog74 · 01-13-2008, 07:41 AM

Code:

for archive in *.rar
do
  unrar e "$archive" "${archive%/*}" > /dev/null
done

if you want to use find in the for loop, put double quotes when you call the "archive" variable

colucix · 01-13-2008, 07:58 AM

ghostdog74, you sure? On my system "for archive in *.rar" does not recurses subdirectories. I'd rather do something a little more tricky like this

Code:

#!/bin/bash
archives=$(find . -iname "*.rar" -printf "%p@")
IFS="@"
for archive in $archives
do
  path_to_extract=$(dirname $archive)
  unrar e $archive $path_to_extract > /dev/null
done

@quackyo: here the trick is to use an Input Field Separator different from the default one (any of blank space, tab or newline). I choosed "@" assuming you don't have any file or directory names containing "@". In this way, names containing one or more blank spaces are not splitted inside the for loop.

ghostdog74 · 01-13-2008, 08:24 AM

Quote:

Originally Posted by colucix

ghostdog74, you sure? On my system "for archive in *.rar" does not recurses subdirectories. I'd rather do something a little more tricky like this

Code:

#!/bin/bash
archives=$(find . -iname "*.rar" -printf "%p@")
IFS="@"
for archive in $archives
do
  path_to_extract=$(dirname $archive)
  unrar e $archive $path_to_extract > /dev/null
done

no, it does not recurse directories, my bad for misinterpreting the requirement. however that's trivial to do.

Quote:

@quackyo: here the trick is to use an Input Field Separator different from the default one (any of blank space, tab or newline). I choosed "@" assuming you don't have any file or directory names containing "@". In this way, names containing one or more blank spaces are not splitted inside the for loop.

one way to go around that is include double quotes, at least it works for me eg

Code:

for files in "$(find . -iname  '*.rar')"; do echo "$files"; done

radoulov · 01-13-2008, 09:26 AM

With zsh:

Code:

for f (**/*.rar) rar x  $f

Otherwise:

Code:

find . -name '*.rar' -exec rar x {} \;

colucix · 01-13-2008, 09:30 AM

Quote:

for files in "$(find . -iname '*.rar')"; do echo "$files"; done

Yes, it works for me too. But the loop will run once and the unrar command will fail, since all the arguments will be on the same (unique) command line, even if filenames are separated by a newline. E.g. the following lines will stay all together as one block

Code:

/path/to/file_one.rar
/path/to/subdir/file with spaces.rar
/path/to/subdir/file_two.rar

This is actually one of the reasons why all the *nix guides advise against using blank spaces in filenames!

Ciao

urka58 · 01-13-2008, 10:09 AM

@colucix

yes, you're right, I did not consider the output dir, but on the solution you proposed the imput dir is missing (@least not specified).
find . searches in $PWD which not necessarely is /path/to/rar_files..
A cd /path/to/rar_files can easily fix it

Ciao

Jongi · 04-26-2009, 03:31 PM

I am trying to use the info here to allow for white spaces in a multiple rar extract. I would want to manually state the output directory (I've called the file multiple-extract).

Code:

for archive in $(find . -iname "*.rar")
do
  unrar e "$archive" "$1"/ 
done

I have even tried using single quotes against $archive. so the above works with rar files with no white spaces. I can do one of the below for it to work:

Code:

multiple-extract .
multiple-extract temp\ dir
multiple-extract "temp dir"

When I try with white spaces I get

Code:

[root@localhost test]# ls
evo 1.rar  opera 1.rar
[root@localhost test]# multiple-extract .

UNRAR 3.71 beta 1 freeware      Copyright (c) 1993-2007 Alexander Roshal

Cannot open $archive.rar
No such file or directory
No files to extract

UNRAR 3.71 beta 1 freeware      Copyright (c) 1993-2007 Alexander Roshal

Cannot open $archive.rar
No such file or directory
No files to extract

UNRAR 3.71 beta 1 freeware      Copyright (c) 1993-2007 Alexander Roshal

Cannot open $archive.rar
No such file or directory
No files to extract

UNRAR 3.71 beta 1 freeware      Copyright (c) 1993-2007 Alexander Roshal

Cannot open $archive.rar
No such file or directory
No files to extract

ghostdog74 · 04-26-2009, 09:14 PM

use a while read loop

Code:

find .... | while read FILE
do
 unrar ..... "$FILE" ...
done

jschiwal · 04-26-2009, 10:33 PM

I'm not certain if this will work, but try
find /path/to/dir -iname "*.rar" -execdir unrar x '{}' \;

The -execdir option may execute the unrar command in the directory of the file found.

You might want to test if using -okdir unrar x '{}' \; first. If it fails on the first match, you can abort.

Jongi · 04-27-2009, 06:39 AM

Quote:

Originally Posted by ghostdog74

use a while read loop

Code:

find .... | while read FILE
do
 unrar ..... "$FILE" ...
done

yep that did the trick. thanks.