Re: Problem with database engine on Cygwin

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

Larry,

It may be more complicated than that.  unlink() calls DeleteFile(), and
who knows what happens in the guts of it.  For instance, I'm having a
permission problem with deleting files on a Samba share from inside of
applications (but no problems deleting them from the shell).  I've traced
it as far as the DeleteFile() call, which fails in the former case and
succeeds in the latter.  Go figure...

My advice to the OP, though, is to check all the return codes, especially
for system calls.
	Igor

On Tue, 8 Apr 2003, lhall at pop dot ma dot ultranet dot com wrote:

> Running on a FAT partition perhaps?
>
> You may find a review of the code for unlink() (remove() calls this)
> call in the Cygwin DLL interesting.  You might find it even more interesting
> to build your own debug version of cygwin1.dll and stop in this function.
> ;-)
>
> Still sounds allot like you're having a permission problem on delete.
>
> Larry
>
> Original Message:
> -----------------
> From:  dmay at tvi dot edu
> Date: Tue, 8 Apr 2003 16:44:06 -0600 (MDT)
> To: cygwin at cygwin dot com, dmay at tvi dot edu
> Subject: Re: Problem with database engine on Cygwin
>
>
> On Monday, Apr 7, 2003 I posted a query re. an issue I am having using a
> database engine I wrote with Cygwin.  Through the use of Asserts() and
> liberal
> printf()s I have traced the problem down to a single line of code.
> Basically,
> the code does the following:
>
> int fd;
> fd = creat ("SSNumberIndex.inx", 0644);
>
> This is failing with a "permission denied" system error.  In terms of the
> order of how things are done, the file SSNumberIndex.inx is unattached from
> an
> old table, deleted, and then recreated.  It is during this recreation that I
> am having the problem.  There is not a file with this name in the current
> directory (it is deleted through a remove() system call, and the system
> indicates that the removal is successful).
>
> I have tried the following CYGWIN environment variables:
>
> set CYGWIN=nontsec tty glob
> set CYGWIN=nontsec tty glob binmode
> set CYGWIN=ntsec tty glob binmode
> set CYGWIN=ntsec tty glob
>
> All to no avail.  I have read the sections on file permissions and text and
> binary modes in Chapter 3 of the User Guide.  I have skimmed through the
> FAQ.
> I don't see anything that resembles this issue.  My apologies if I just
> missed it.
>
> Any ideas would be appreciated.  Thanks in advance.

-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha at cs dot nyu dot edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor at watson dot ibm dot com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Knowledge is an unending adventure at the edge of uncertainty.
  -- Leto II


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