GrubLord GrubLord - 1 year ago 127
Git Question

How do I keep NUL bytes from appearing throughout my GIT repository and commit messages?

I have a relatively clean install of Mac OS X Mavericks 10.9 running git version; my files are on a mounted SMB share, and I am no longer able to work properly with my GIT repositories because NULL bytes (\0's) keep appearing in all of my version-controlled files... and even in files generated on the fly by GIT.


git commit -m "Test message"
by hand, gives me:

error: a NULL byte in commit log message not allowed.
fatal: failed to write commit object

And if I attempt to
git commit
instead, the default commit message that appears in the
view looks like this:

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch feature/centos_support
# Your branch is up-to-date with 'origin/feature/centos_support'.
# Changes to be committed:
# modified:

For a while, manually removing those NULL bytes at the end worked, and I was able to commit, but at intervals even this no longer works (the error is the same as above), and I am forced to trash my entire repo, re-clone it, and redo whatever I was trying to commit.

The fresh repository works as normal for a while, but eventually the NULL characters creep back in, and I have the same problem again.

The same NULL bytes (as above) are appearing at the start and end of files I modify, causing GIT to treat them as binary files until I manually use
to delete the NULL rows.

  • Has anybody else experienced this, and/or found a solution?

  • What could be causing it?

I would appreciate any help you can offer.

Answer Source

It looks like this is a problem with OS X 10.9 Mavericks and (some?) SMB shares. There is currently no fix or workaround.

Some people have suggested connecting to the share with cifs:// instead of smb:// however this does NOT appear to solve the issue.

The issue can be reproduced as follows:

<on an SMB share>

$ echo "blah blah blah blah" > test.txt
$ more test.txt

<file is fine>

$ echo "blah" > test.txt
$ more test.txt

<file has ^@ characters at the end>

So, using the terminal, if you overwrite a file with a smaller one, then you get these NUL characters at the end. There may be other ways to cause the file to be appended or prepended with those NUL characters too.

A number of people are complaining about this, for example:

Here is the conclusion from that page:

I can replicate the null characters in Komodo Edit and Aptana Studio, so this doesn't appear to be a Netbeans specific issue, and is probably related to the NAS/SMB issue.

I forced the smb1 connection but it made no difference. Even if I eject the shares, and reconnect with cifs:// and create, modify and save a file, it's still corrupted.

It looks like Apple is going to have to resolve this, unless someone can come up with a viable workaround.

Hopefully Apple will fix this issue shortly. Until then, you could potentially use Double Commander or some other program that implements its own SMB stack.

Recommended from our users: Dynamic Network Monitoring from WhatsUp Gold from IPSwitch. Free Download