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Handle non-sequential writes in MultiuserFile #61

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Handle non-sequential writes in MultiuserFile #61

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7 changes: 4 additions & 3 deletions src/multiuser.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -177,13 +177,14 @@ ssize_t MultiuserFile::Write(const void *buffer, off_t offset, size_t size)
if ((offset != m_nextoff) && m_state)
{
std::stringstream ss;
ss << "Out-of-order writes not supported while running checksum. " << m_fname;
ss << "Non-sequential write detected; disabling checksum calculation for " << m_fname;
m_log.Emsg("Write", ss.str().c_str());
return -ENOTSUP;
delete m_state;
m_state = NULL;
}

auto result = m_wrapped->Write(buffer, offset, size);
if (result >= 0) {m_nextoff += result;}
if (result >= 0) {m_nextoff = offset + result;}
if (m_state)
{
m_state->Update(static_cast<const unsigned char*>(buffer), size);
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