Linux copy to fat32 filesystem: invalid argument

Question

After writing the following code, am getting the error as Cannot implicitly convert type 'int' to 'byte'. An explicit conversion exists (are you missing a cast?)

FileStream MyFileStream = new FileStream(fileName, FileMode.Open);
long FileSize;
FileSize = MyFileStream.Length;
byte[] Buffer = new byte[] { (((int)(FileSize)) - 1) };

Help me to solve this issue. Thanks.

Solution: (Thanks to p.s.w.g)

byte[] Buffer = new byte[FileSize];

Solved the issue. As p.s.w.g suggested I've changed the value to 4096 in order to use the MemoryStream.

Solution 1

The usual suspects when you want complex copies or renames are GNU cp, zmv from zsh, rsync and pax (or cpio). There's no rename feature in cp, nor (I think) in rsync. While zmv can rename, this doesn't mesh well with recursive copies. But pax can do it:

cd /ext3
pax -rw -s '/[*?:]/_/gp' stuff /fat32/partition

This changes each *?: to _. Warning: minimally tested. If there are collisions, whichever file is copied last wins.

Solution 2

Based on post by Gilles I tested the following list:

#!/bin/sh
touch questionmark?
touch less<
touch less\<
touch more\>
touch backslash\\
touch colon:
touch asterisk\*
touch pipe\|
touch inch\"
touch carret\^
touch comma,
touch semicolon\;
touch plus+
touch equals=
touch lbracket[
touch rbracket]
touch quote\'

I tried to copy that onto Android phone MicroSDHC card with vfat filesystem and refined pax command until everything worked. That may still not be enough for Windows and Unicode:

pax -rw -s '/[?<>\\:*|\"]/_/gp' source dest

You may also want to use the -k option to ensure that there are no overwrites (due to collisions in file names). Both lists I gave in the comment were different from Linux vfat behaviour.

Comments

[Karthik]

(((int)(FileSize)) - 1) why would you want to convert this to byte array?

[Mitch Wheat]

code makes no sense. Solve by closing!

[Karthik]

@Dineshkumar explain what you are trying to do

[mo-seph]

Nice - haven't used pax before. Thanks for putting me on to it.

[lzap]

Backslash also makes problems to vfat. Include it in the regexp as well. Thanks!

[dhill]

The full list according to support.grouplogic.com/?p=1607 is: / ? < > \ : * | ” ^. Also it cannot end with space or dot and some names are reserved. Mtools manpage gives even bigger list: , ; : ? + * = [ ] < > ' " \ / |

[asf]

Thanks for your quick reply. It works...!

[balu]

And a different note and for people having the same issue as me: pax does not support using -s in combination with the update command -u. I.e. it will always copy renamed files again even if they already exist. It took me hours to find out about that.