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refs #782 Extended error information when data cache fails to write.

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This commit is contained in:
Mathew Sutcliffe
2016-10-22 23:42:19 +01:00
committed by Klaus Basan
parent 6a5444590e
commit 0b07088639
2 changed files with 20 additions and 5 deletions
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19
src/blackmisc/atomicfile.cpp
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@@ -18,6 +18,7 @@
#if defined(Q_OS_POSIX)
#include <stdio.h>
#include <errno.h>
#elif defined(Q_OS_WIN32)
#include <windows.h>
#endif
@@ -90,13 +91,27 @@ namespace BlackMisc
void CAtomicFile::replaceOriginal()
{
auto result = ::rename(qPrintable(fileName()), qPrintable(m_originalFilename));
if (result < 0) { m_renameError = true; }
if (result < 0)
{
m_renameError = true;
char s[1024] {};
auto x = strerror_r(errno, s, sizeof(s));
setErrorString(QString::fromLocal8Bit(s));
static_assert(std::is_same<decltype(x), int>::value, "Non-standard signature of POSIX function strerror_r, check documentation.");
}
}
#elif defined(Q_OS_WIN32)
void CAtomicFile::replaceOriginal()
{
auto result = MoveFileExA(qPrintable(fileName()), qPrintable(m_originalFilename), MOVEFILE_REPLACE_EXISTING);
if (! result) { m_renameError = true; }
if (! result)
{
m_renameError = true;
wchar_t *s = nullptr;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(), 0, reinterpret_cast<LPWSTR>(&s), 0, nullptr);
setErrorString(QString::fromWCharArray(s));
LocalFree(reinterpret_cast<HLOCAL>(s));
}
}
#else
void CAtomicFile::replaceOriginal()