bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[John Wiegley]

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I'm not sure if this is a Mac problem, or an Emacs 25 problem, but it occurs
with the latest emacs-25 on OS X 10.10:

    M-: (make-temp-name "index.magit.") RET

Will report the error:

    Cannot create temporary name for prefix: Bad file descriptor, index.magit.

I discovered this because Magit 2.6 uses temporary files with such a name.

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2

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bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[Eli Zaretskii]

> From: John Wiegley <jwiegley@gmail.com>
> Date: Thu, 21 Apr 2016 09:30:40 -0700
> 
> I'm not sure if this is a Mac problem, or an Emacs 25 problem, but it occurs
> with the latest emacs-25 on OS X 10.10:
> 
>     M-: (make-temp-name "index.magit.") RET
> 
> Will report the error:
> 
>     Cannot create temporary name for prefix: Bad file descriptor, index.magit.

Works like a charm on MS-Windows and GNU/Linux, FWIW.

Can you step with a debugger through the relevant C code?

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[Alan Third]

John Wiegley <jwiegley@gmail.com> writes:

> I'm not sure if this is a Mac problem, or an Emacs 25 problem, but it occurs
> with the latest emacs-25 on OS X 10.10:
>
>     M-: (make-temp-name "index.magit.") RET
>
> Will report the error:
>
>     Cannot create temporary name for prefix: Bad file descriptor, index.magit.
>
> I discovered this because Magit 2.6 uses temporary files with such a name.

Hi John, I've just tried this out on my own Mac (10.11) and it's working fine.
Are you still getting the error?
-- 
Alan Third

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[Alan Third]

Alan Third <alan@idiocy.org> writes:

> John Wiegley <jwiegley@gmail.com> writes:
>
>> I'm not sure if this is a Mac problem, or an Emacs 25 problem, but it occurs
>> with the latest emacs-25 on OS X 10.10:
>>
>>     M-: (make-temp-name "index.magit.") RET
>>
>> Will report the error:
>>
>>     Cannot create temporary name for prefix: Bad file descriptor, index.magit.
>>
>> I discovered this because Magit 2.6 uses temporary files with such a name.
>
> Hi John, I've just tried this out on my own Mac (10.11) and it's working fine.
> Are you still getting the error?

I feel a bit weird about this, but I still can't reproduce it and it's
been over seven weeks with no response, so I'm inclined to close the
bug.
-- 
Alan Third

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[John Wiegley]

>>>>> Alan Third <alan@idiocy.org> writes:

> I feel a bit weird about this, but I still can't reproduce it and it's been
> over seven weeks with no response, so I'm inclined to close the bug.

Still happens reliably here, and based on bug reports on GitHub, others are
experiencing it as well.  It doesn't happen in 24.

-- 
John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[Alan Third]

On Tue, Jul 19, 2016 at 01:03:59PM -0700, John Wiegley wrote:
> >>>>> Alan Third <alan@idiocy.org> writes:
> 
> > I feel a bit weird about this, but I still can't reproduce it and it's been
> > over seven weeks with no response, so I'm inclined to close the bug.
> 
> Still happens reliably here, and based on bug reports on GitHub, others are
> experiencing it as well.  It doesn't happen in 24.

Is there anything else involved? I’m only doing:

    Emacs -Q

    M-: (make-temp-name "index.magit.") RET

Can you try either running in a debugger and finding out what the
‘data’ variable contains at line 716 of fileio.c (just before
‘if (!check_existing (data))’), or putting something like:

    printf("filename: %s\n", data);

on that same line?

The make_temp_name function generates a name and then tests to see if
it already exists and it’s this test that’s throwing up the error. My
first thought is that it’s possible that it’s generating an invalid
file name, so it would be good to see exactly what that name is.

Also, what’s the PWD?

Thanks!
-- 
Alan Third

bug#23331: 25.0.92; Cannot create temporary file ending in a period on OS X

[Glenn Morris]

Alan Third wrote:

> Can you try either running in a debugger and finding out what the
> ‘data’ variable contains at line 716 of fileio.c (just before
> ‘if (!check_existing (data))’), or putting something like:
>
>     printf("filename: %s\n", data);
>
> on that same line?
>
> The make_temp_name function generates a name and then tests to see if
> it already exists and it’s this test that’s throwing up the error. My
> first thought is that it’s possible that it’s generating an invalid
> file name, so it would be good to see exactly what that name is.
>
> Also, what’s the PWD?

No response in several months, closing.