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2018.12.11 13:36 "SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.11 14:01 "Re: SeekOK and WriteOK", by Bob Friesenhahn
2018.12.11 14:09 "Re: SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.11 14:24 "Re: SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.11 14:29 "Re: SeekOK and WriteOK", by Nicolas Ruff
2018.12.11 18:54 "Re: SeekOK and WriteOK", by Bob Friesenhahn
2018.12.12 08:53 "Re: SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.13 11:04 "Re: SeekOK and WriteOK", by Emmanuel Cosnard
2018.12.13 13:13 "Re: SeekOK and WriteOK", by Paavo Helde

2018.12.11 14:29 "Re: SeekOK and WriteOK", by Nicolas Ruff

This might be by design of the API :)
http://bugzilla.maptools.org/show_bug.cgi?id=2726

lseek() returns -1 in both cases:
- lseek(-1, SEEK_SET)
- An error occurred

You have to clear then check errno to distinguish between cases.

Le mar. 11 déc. 2018 à 15:24, Emmanuel Cosnard <emmanuel.cosnard@outlook.fr>
a écrit :

> Hello,
>
> I am using the function TIFFWriteData to write some data on a custome
> rationnal tag, and it seems, that on some rare occasion,
> if (SeekOK(tif, dir->tdir_offset) && WriteOK(tif, cp, cc))
> Is there a way to do some intelligent retry here, instead of returning an
> error? Or can we know why the WriteOK or SeekOK didn't work properly?
>
> Thanks and regards,
>
> Emmanuel
> _______________________________________________
> Tiff mailing list
> Tiff@lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/tiff
>

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