[texhax] adobe 10

[Philipp Stephani]

Am 29.05.2011 um 19:59 schrieb Heiko Oberdiek:

> On Sun, May 29, 2011 at 01:26:57AM +0200, Reinhard Kotucha wrote:
> 
>> Why?  As I said before, a file exists even after it has been deleted.
>> It exists until the last process accessing it dies.  AR can read from
>> an already opened file whenever it wants, regardless of whether TeX
>> created a new, incompatible, version of a file with the same name.
>> There are actually two distinct files, though only one of them has a
>> name (a directory entry).
> 
> But a writing process might open the existing file and deleting
> the contents by truncating. Then there is only one modified file
> and the reading program might be surprised.

And that is what TeX programs do. They never delete files, they just re-create them, and therefore the PDF viewer reads the same file that the compiler writes. It can often be observed that automatically-reloading PDF viewers show blank pages during long compilation processes. This would not happen if the file that is written is not the same file than that which is read.