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Date: Fri, 13 Nov 2009 14:10:23 -0700
From: Eric Blake <ebb9 AT byu DOT net>
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To: Salvador Fandino <sfandino AT yahoo DOT com>
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Subject: Re: [BUG] fopen(..., "a") does not seek to end of file until some  write operation
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According to Salvador Fandino on 11/13/2009 1:55 PM:
>> 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:

Ok, so "a" and "a+" apparently behave differently in Linux.  Submit a
patch to newlib if it bothers you.  Still, the point remains that this
does not violate POSIX.  Also, since the underlying open() is _required_
to be at offset 0 when opening a file for appending, it is actually _more_
syscalls if stdio seeks to the end of an append stream during fopen(),
rather than waiting until the first write.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9 AT byu DOT net
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