[Spam?]Re: problem concating (>>) to a large file

Eric Blake ebb9@byu.net
Tue May 29 15:47:00 GMT 2007

Eric Blake <ebb9 <at> byu.net> writes:

> Somehow, when the file size is huge, cygwin is not properly propogating that 
> O_APPEND bit (0x9 in the flags printed from F_GETFL) means that the initial 
> offset of fd 1 is the end of the file.  (And it would be nice if strace would 
> show the initial lseek offset of all inherited fd's when spawning a process).

Actually, there is another cygwin bug.  POSIX requires that this assertion 

assert (0 == lseek (open("existing", O_WRONLY | O_APPEND), 0, SEEK_CUR));

which is currently not the case on small files.  The file position is only 
moved as part of the subsequent write()s.

Eric Blake

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