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Date: Tue, 20 Mar 2012 13:48:29 +0400
Message-ID: <CAJOtW+5Mf9uYfe6x8+HsDxWyUmT11DFvDAs1QE00uj5uOayfaA@mail.gmail.com>
Subject: Re: ftell() fails on files in shared folders
From: Yuri Gribov <tetra2005 AT googlemail DOT com>
To: cygwin AT cygwin DOT com
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Corinna,

> No, it doesn't change that often. =A01.7.9 is actually a year old,
> though. =A0Updating *might* help.
>
> Btw., assuming you call lseek(fileno(p), SEEK_CUR, 0) rather than
> ftell(p), what position does it return?

I have rewritten my program to use only low-level API (open, write,
lseek) and installed latest Cygwin. It seems that the error is caused
by O_RDWR - as soon as I change it to O_WRONLY everything starts to
work:

Local, O_WRONLY:
  C:\Users\gribov.y>\\s-cw-head\pgas\a.exe //s-cw-head/c$/test.bin
  success

Local, O_RDWR:
  C:\Users\gribov.y>\\s-cw-head\pgas\a.exe //s-cw-head/c$/test.bin rw
  success

Remote, O_WRONLY:
  C:\Users\gribov.y>\\s-cw-head\pgas\a.exe //s-cw-node01/c$/test.bin
  success

Remote, O_RDWR:
  C:\Users\gribov.y>\\s-cw-head\pgas\a.exe //s-cw-node01/c$/test.bin rw
  sizeof(data) =3D=3D lseek(fd, 0, SEEK_END) failed at io.c:36

--=20
Best regards,
Yuri

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