vsprintf() sets _IOWRITING flag
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@ -14,7 +14,7 @@ vsprintf(char *s, const char *format, va_list arg)
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FILE tmp_stream;
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tmp_stream._fd = -1;
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tmp_stream._flags = _IOWRITE + _IONBF;
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tmp_stream._flags = _IOWRITE + _IONBF + _IOWRITING;
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tmp_stream._buf = (unsigned char *) s;
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tmp_stream._ptr = (unsigned char *) s;
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tmp_stream._count = 32767;
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