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Fix assertion on Windows when redirecting console output to nul

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`GetConsoleMode` can fail with `ERROR_INVALID_HANDLE` when redirecting output to `nul`, which is considered a character file but cannot be used as a console.
This commit is contained in:
Robert Müller 2024-04-17 19:49:28 +02:00
parent e142b2d526
commit 3ef00d465e
1 changed files with 9 additions and 3 deletions
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12
src/base/log.cpp
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@ -410,7 +410,13 @@ std::unique_ptr<ILogger> log_logger_stdout()
if(OutputType == FILE_TYPE_CHAR)
{
DWORD OldConsoleMode = 0;
dbg_assert(GetConsoleMode(pOutput, &OldConsoleMode), "GetConsoleMode failure");
if(!GetConsoleMode(pOutput, &OldConsoleMode))
{
// GetConsoleMode can fail with ERROR_INVALID_HANDLE when redirecting output to "nul",
// which is considered a character file but cannot be used as a console.
dbg_assert(GetLastError() == ERROR_INVALID_HANDLE, "GetConsoleMode failure");
return nullptr;
}
const bool Colors = _wgetenv(L"NO_COLOR") == nullptr;
@ -421,7 +427,7 @@ std::unique_ptr<ILogger> log_logger_stdout()
// Try to downgrade mode gracefully when failing to set both.
if(!SetConsoleMode(pOutput, OldConsoleMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING))
{
// Fallback to old, slower Windows logging API, when failung to enable virtual terminal processing.
// Fallback to old, slower Windows logging API, when failing to enable virtual terminal processing.
return std::make_unique<CWindowsConsoleLogger>(pOutput, Colors);
}
}
@ -440,7 +446,7 @@ std::unique_ptr<ILogger> log_logger_stdout()
// We can use the async logger to write to files and pipes
// by converting the HANDLE to an IOHANDLE.
// For pipes there does not seem to be any way to determine
// whether the console support ANSI escape codes.
// whether the console supports ANSI escape codes.
return std::make_unique<CLoggerAsync>(ConvertWindowsHandle(pOutput, _O_APPEND), false, false);
}
else