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 Forum index » Off-Topic Area » Programming
dir2sfs with xz compression, How can I? (Solved)
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oldyeller


Joined: 15 Nov 2011
Posts: 889
Location: Alaska
PostPosted: Sun 23 Mar 2014, 11:20    Post subject:  dir2sfs with xz compression, How can I? (Solved)  
Hello Everyone,

Can dir2sfs be edited to and or have xz compression?

Code:

#!/bin/bash

. /etc/DISTRO_SPECS

t=`echo "$1" | sed "s/\/$//"`
z=`echo "$1" | sed "s/\/$//"`

if [ ! -d "$t" ];then

  echo "error: no valid folder specified!"
  exit 0

fi

### if no _versionnummer in the end, get it from system
check=`echo $t | sed "s/\(.*\)_[0-9][0-9][0-9]$/\1/"`

#echo --- $check

if [ "$check" == "$t" ];then

  v=$DISTRO_VERSION
  z="${check}_$v"

fi
#echo $t - $z


if [ -f "$z.sfs" ];then

  echo "$z.sfs already exists, refusing to overwrite it!"
  exit 0

fi

mksquashfs "$t" "$z.sfs"
md5sum "$z.sfs" > "$z.sfs-md5.txt"
sync


echo
echo
s=`du -m "$z.sfs" | sed "s/\s.*//"`
echo "created: $z.sfs ( $s MB )"
echo "created: $z.sfs-md5.txt"
echo
echo "...byebye..."
echo

Last edited by oldyeller on Sun 23 Mar 2014, 15:57; edited 1 time in total
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Keef


Joined: 20 Dec 2007
Posts: 922
Location: Staffordshire
PostPosted: Sun 23 Mar 2014, 11:38    Post subject:  
Adding
Code:
 -comp xz
to the mksquashfs line ought to do it I think.
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oldyeller


Joined: 15 Nov 2011
Posts: 889
Location: Alaska
PostPosted: Sun 23 Mar 2014, 15:56    Post subject:  
Keef wrote:
Adding
Code:
 -comp xz
to the mksquashfs line ought to do it I think.


Thanks that worked save 3m off my sfs.

Cheers
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Geoffrey


Joined: 30 May 2010
Posts: 2362
Location: Queensland
PostPosted: Sun 23 Mar 2014, 21:28    Post subject: Re: dir2sfs with xz compression How can I SOLVED  
oldyeller wrote:
Hello Everyone,

Can dir2sfs be edited to and or have xz compression?



This is the code from Saluki/Carolina, select gz or xz

Code:
#!/bin/bash

t=`echo "$1" | sed "s/\/$//"`
z=`echo "$1" | sed "s/\/$//"`

if [ ! -d "$t" ];then

  echo "error: no valid folder specified!"
  exit 0

fi

### if no _versionnummer in the end, get it from system
check=`echo $t | sed "s/\(.*\)_[0-9][0-9][0-9]$/\1/"`

#echo --- $check


#echo $t - $z


if [ -f "$z.sfs" ];then

  yad --title "sfs exists" --text "$z.sfs already exists, refusing to overwrite it!" --button=ok:0
  exit 0

fi

yad --title "Choose Compression Type" --button=XZ:0 --button=GZIP:1 --text "Choose which algorthim to compress the sfs with.
Chosing XZ here will give you a smaller iso but
may be slower than GZIP on very lowspec machines."
[ $? = 0 ] && COMP="-comp xz"

mksquashfs "$t" "$z.sfs" $COMP |while read -n 50 LINE ; do
echo $LINE |egrep '[0-9]\%'| cut -f1 -d% |awk '{print $NF}'|grep -v '\.' ;done | \
Xdialog --title "Building Squashfile " --gauge "Building Squashfile. Please Wait..." 0 0
md5sum "$z.sfs" > "$z.sfs-md5.txt"
sync


echo
echo
s=`du -m "$z.sfs" | sed "s/\s.*//"`
echo "created: $z.sfs ( $s MB )"
echo "created: $z.sfs-md5.txt"
echo
echo "...byebye..."
echo

_________________
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oldyeller


Joined: 15 Nov 2011
Posts: 889
Location: Alaska
PostPosted: Mon 24 Mar 2014, 14:47    Post subject:  
Hi Geoffrey,

Will give this a go. Thanks
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saintless


Joined: 11 Jun 2011
Posts: 3882
Location: Bulgaria
PostPosted: Mon 24 Mar 2014, 15:14    Post subject:  
oldyeller wrote:
Keef wrote:
Adding
Code:
 -comp xz
to the mksquashfs line ought to do it I think.


Thanks that worked save 3m off my sfs.

Cheers

I think you will save some more with this one:
Code:
-b 1024k -comp xz -Xbcj x86

Gives the best compression xz can do for squashfs.

Toni
_________________
Farewell, Nooby, you will be missed...
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ASRI éducation


Joined: 09 May 2009
Posts: 3203
Location: France
PostPosted: Tue 08 Jul 2014, 22:18    Post subject:  
saintless wrote:
I think you will save some more with this one:
Code:
-b 1024k -comp xz -Xbcj x86

Gives the best compression xz can do for squashfs.

Thank you,
I just tried and the result is impressive.
For a 509 MB folder, I get 149MB with -comp xz, and 129MB with -b 1024k -comp xz -Xbcj x86
_________________
Projet ASRI éducation => Association | Forum | Dépôt | Espace kids
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hamoudoudou

Joined: 24 Jul 2014
Posts: 1467
Location: rabat
PostPosted: Sat 09 Jun 2018, 05:18    Post subject: Asri did a pet for adrive  
Bookmarked.
Asri did a pet for adrive, similar as dir2sfs. Somebody would have any idea where to retrieve it ?
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hamoudoudou

Joined: 24 Jul 2014
Posts: 1467
Location: rabat
PostPosted: Mon 16 Jul 2018, 22:52    Post subject: pas de réponse.  
pas de réponse.. le résultat d'une compression dépend aussi du fichier à comprimer..
blank is the main character
When 1000 blanks, they are replaced by a flag '1000 blanks to write' flag is only 2 or 3 characters
Chinois.jpg
 Description   Chinese is hard to compress
 Filesize   29.78 KB
 Viewed   87 Time(s)

Chinois.jpg
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