Hi Nicolas, On Wed, Jul 20, 2016 at 6:21 PM, Nicolas le bayon <nleba...@gmail.com> wrote: > Hi all, > > With a quite old u-boot release (October 2015 more or less), I has some > different issues around fatwrite operations. I realigned a few things > around FAT with latest release, and now I observe only one issue. Maybe > this has been discussed here before, I searched but no success. > > I'd like to save a file on an external device (sd card or usb stick), but > not on the root, in a sub-directory. I made the implementation with EXT4 > and it works fine. But no way (for the moment) with FAT. > > Here is the behaviour, let's imagine the device contains only a "mydir" > directory. >> fatls <device> > mydir/ >> fatwrite <device> <addr> myfile.txt <filesize> >> fatls <device> > mydir/ > myfile.txt >> fatwrite <device> <addr> mydir/myfile2.txt <filesize> >> fatls <device> > mydir/ > myfile.txt > mydir/myfile2.txt > In fact, data is stored in a file strangely named with a '/' character. > > And when I put the device back on my Linux PC, I can see myfile.txt, > nothing special in mydir directory, and no "mydir/myfile2.txt" file. > > Does someone have already observed this?
Yes. The issue is that do_fat_write() only supports filenames, and not full paths, so whatever you give it ends up as a filename in the root directory. There is no workaround. Best regards, Benoît _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot