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Top Forums Shell Programming and Scripting Copy file to SD card from internal flash. Post 302558100 by Corona688 on Thursday 22nd of September 2011 05:43:40 PM
Old 09-22-2011
That's a tape archive! Smilie

Specifically ustar, the modern kind. See tar (file format)

Each file record begins with a header containing, among other things, a filename and 'ustar'. The literal contents of the file follow immediately after, padded to a certain block size.

This is good news. If you can figure out where the file begins and ends, you can dump it and extract it with ordinary tools, and build a new one from scratch. (It'd be best to do so on a UNIX system though, because it contains important file permissions, something a Windows system would botch mercilessly.)

You might also be able to append things without altering the previous content; tar, being originally built for tapes, plays well with that.

Last edited by Corona688; 09-22-2011 at 06:51 PM..
 

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MOUNT_CHFS(8)						    BSD System Manager's Manual 					     MOUNT_CHFS(8)

NAME
mount_chfs -- mount a CHFS flash file system SYNOPSIS
mount_chfs DESCRIPTION
Mounts a flash file system from a flash(4) device. CHFS file systems can be only mounted from flash devices. For regular block devices like SSD drives or USB drives, please use a regular file system. The file system will be created during the first mount. CHFS stands for Chip File System. EXAMPLES
mount_chfs /dev/flash0 /mnt SEE ALSO
flash(4), fstab(5), mount(8), flash(9) HISTORY
CHFS was originally called ChewieFS during development. The name was changed to avoid legal issues and to have a more neutral name. AUTHORS
CHFS was developed at the Department of Software Engineering, University of Szeged, Hungary. BUGS
CHFS has a few known bugs as of 2011. Writing the FS full can cause problems. Truncating a file and growing it again can cause the new bytes not having all zeroes, but filled with the old content instead. BSD
November 29, 2011 BSD
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