Created attachment 15507 [details]
WIP patch for master

There's an ussue when exporting from Adobe Illustrator package directly to a Samba share.

When exporting a project that contains several copies of the same image, multiple number of files are created instead of having just one file.

Steps to reproduce:

  1.  Create an illustrator project with few copies of the same image, so the same image
      will be used many times in the same project.
  2.  Go to Files -> export
  3.  Go to the destination folder--> enter the Links folder --> the folder will contain
      multiple images (as the number of links).

Expected behavior:

The links folder should contain only one copy of file that being used in the project.

The same works correctly against a Windows server.

The problem seems to be, that the image file's modification date is not set to the correct value as requested by the client

There's a strange interaction between a write on a file handle followed by an explicit set of the filesize on the same file handle and a following explicit set of the write time on second handle that affects the observable write time of the file on the first handle when it's closed.

Windows servers returns the explicitly set write time, Samba returns the time when the handle that did the write IO is closed.

It seems setting the filesize on a handle immediately flushed any pending write time updates, so the write time is not updated when the handle is closed.