[BUG] fopen(..., "a") does not seek to end of file until some write operation

Salvador Fandino sfandino@yahoo.com
Fri Nov 13 21:10:00 GMT 2009


----- Original Message ----
> From: Eric Blake <ebb9@byu.net>
> To: cygwin@cygwin.com; sfandino@yahoo.com
> Sent: Fri, November 13, 2009 9:41:14 PM
> Subject: Re: [BUG] fopen(..., "a") does not seek to end of file until some write operation
>> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>> According to Salvador Fandino on 11/13/2009 1:36 PM:
> > Hii
> > 
> > Using ftell() after fopen(..., "a") returns 0 even when the file open for 
> appending is not empty. AFAIK, it should return the size of the file.
>> Not a bug. POSIX allows this behavior, and Linux does it as well.

In Linux (at least on the one I have installed, Ubuntu 9.10) ftell does not return cero but the EOF offset:
salva@leon:/tmp$ ./a.out 
pos: 0
pos: 12
salva@leon:/tmp$ ./a.out 
pos: 12
pos: 24
salva@leon:/tmp$ ./a.out 
pos: 24
pos: 36
Cheers,
- Salva
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