Using tar to access files

Gedare Bloom gedare at
Tue Jun 30 16:48:42 UTC 2015

On Tue, Jun 30, 2015 at 1:10 AM, Nick Withers <nick.withers at> wrote:
> On Tue, 2015-06-30 at 10:09 +0530, Sujay Raj wrote:
>> I need to access configurations files the for web server I am porting to
>> rtems.
>> I create a tar archive , that contains the required folders and files ,
>> convert it into c source using rtems-bin2c , ( a header file and a c source
>> ) and link them with my project.
>> In the init, I call
>> sc = Untar_FromMemory((void *)TARFILE_START, (size_t)TARFILE_SIZE);
> I'm not familiar with that function but I use rtems_tarfs_load()
> successfully.
> other resources off the top of my head.
> P.S. It'd probably be best to send help requests like this to the users
> list
I've used this Untar some. You might want to look into the file image
created, and even untar it with your host to see what it produces.

Here are the commands I use from an old repo (with CVS and SVN vc),
after placing the files in a directory called "files"

cd files
tar -cvf ../FileSystemImage --exclude CVS --exclude .cvsignore --exclude .svn .
cd ..
rtems-bin2c FileSystemImage FileSystemImage

This creates the .c and .h files I need so that I can use in my init():
Untar_FromMemory(FileSystemImage, FileSystemImage_size)

I also used

All of this was awhile ago, but maybe these pointers will help you.


>> where TARFILE_START is the macro with the name of the array , TARFILE_SIZE
>> is the size of the array.
>> But when I run the program, I get errors of the form
>> "Untar: failed to create file <folder>/<filename>"
>> for all the files in the tar archive (there are about 10 files, 10 errors).
>> There are no build errors, and since my application recognizes files
>> present in the tar archive, I think possibly I am missing to initialize
>> something.
>> Help would be really appreciated.
>> Thanks and Regards,
>> Sujay Raj
>> _______________________________________________
>> devel mailing list
>> devel at
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