LibC: make opendir() fail if path is not a directory
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					@ -55,7 +55,7 @@ DIR* fdopendir(int fd)
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DIR* opendir(const char* dirname)
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					DIR* opendir(const char* dirname)
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{
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					{
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	int fd = open(dirname, O_RDONLY);
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						int fd = open(dirname, O_RDONLY | O_DIRECTORY);
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	if (fd == -1)
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						if (fd == -1)
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		return nullptr;
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							return nullptr;
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	return fdopendir(fd);
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						return fdopendir(fd);
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