ftell() fails on files in shared folders

[Yuri Gribov]

Hi all,

I have recently ran into a problem with Cygwin accessing files located
in shared folders. The attached program does fwrite() and then checks
file size with ftell(). Ftell() returns correct results in any of
following situations:
1) I access local file: c:/test.bin
2) I access file via UNC-address from the same computer:
//server-name/dir/test.out
  gribov.y@s-cw-head ~/build/upc/opt
  $ ./a.exe
  success

But when I try to access file via UNC-address from a different machine
ftell() starts returning 0 instead of expected 8:
  gribov.y@s-cw-head ~/build/upc/opt
  $ gcc io.c && run_ms_job -n 1 -network smp a.exe
  ftell(p) == sizeof(data) failed at io.c:26

Note that the file is created and data is written correctly:
  gribov.y@s-cw-head ~/build/upc/opt
  $ xxd ~/pgas/test.bin
  0000000: ffff ffff ffff ffff                      ........
so there seem to be a problem with ftell() itself.

Any help/ideas will be much appreciated. I have tried searching the
MLs but have not found anything similiar to my problem.

-Yuri
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