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035062b2a7
Showstopper and regression against 5.0.24. Previously, we ignored seek() errors (see Bug#22828) and let seek()s against pipes fail. Now, since we check that a seek didn't fail, and return without reading, this bug popped up. This restores the behavior for file-ish objects that could never be seek()ed. mysys/mf_iocache.c: If we detect early that the file is not tell()able, then we should assume that it's also not seek()able and therefore we should never set the (poorly named) "seek_not_done" flag so that we don't immedi- ately try to seek() when reading later. The problem was that tell() was returning -1, so when we read later, we needlessly tried to seek to position (unsigned long) -1 . Also, if we think we're supposed to seek to a position in a file and the file is un-tell()able, then abort. |
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