Function setenv

src/common/utils.cpp:315–342

Set environment variable. If overwrite == false and variable already exist, return true.

// Set environment variable.
// If overwrite == false and variable already exist, return true.
bool setenv(const char* name, const char* value, bool overwrite)
{
#ifdef WIN_NT
	int errcode = 0;

	if (!overwrite)
	{
		size_t envsize = 0;
		errcode = getenv_s(&envsize, NULL, 0, name);
		if (errcode || envsize)
			return errcode ? false : true;
	}

	// In Windows, _putenv_s sets only the environment data in the CRT.
	// Each DLL (for example ICU) may use a different CRT which different data
	// or use Win32's GetEnvironmentVariable, so we also use SetEnvironmentVariable.
	// This is a mess and is not guarenteed to work correctly in all situations.
	if (SetEnvironmentVariable(name, value))
	{
		_putenv_s(name, value);
		return true;
	}
	else
		return false;
#else
	return ::setenv(name, value, (int) overwrite) == 0;
#endif
}

// ***************
// s n p r i n t f