38 	F_OPEN		= 0x01,  enumerator
44 	{ F_OPEN, 0, 0, 0, "stdin"	},
45 	{ F_OPEN, 1, 0, 0, "stdout"	},
46 	{ F_OPEN, 2, 0, 0, "stderr"	}
63 	if (!fcheck(stream, F_OPEN))  in fclose()
76 	if (!fcheck(stream, F_OPEN))  in feof()
85 	if (!fcheck(stream, F_OPEN))  in ferror()
100 	if (!fcheck(stream, F_OPEN))  in fflush()
113 	if (!fcheck(stream, F_OPEN))  in fgets()
186 		if ((stream->_flag & F_OPEN) == 0) {  in fopen()
192 			stream->_flag |= F_OPEN;  in fopen()
224 	if (!fcheck(stream, F_OPEN))  in fprintf()
254 	if (!fcheck(stream, F_OPEN))  in fread()
285 	if (!fcheck(stream, F_OPEN | F_SEEKABLE))  in fseek()
323 	if (!fcheck(stream, F_OPEN | F_SEEKABLE))  in ftell()
332 	if (!fcheck(stream, F_OPEN))  in fwrite()
352 	if (!fcheck(stream, F_OPEN))  in setvbuf()