add directory Linux-0.98

Linux-0.98/Yggdrasil-0.98.3/usr/include/sys/ioctl.h

@@ -0,0 +1,41 @@
+/* $Header: /sys/linux-0.97/include/sys/RCS/ioctl.h,v 0.2 1992/08/03 19:56:43 root Exp root $
+ *
+ * sys/ioctl.h for Linux by H.H. Bergman.
+ */
+
+#ifndef _SYS_IOCTL_H
+#define _SYS_IOCTL_H
+
+
+/* ioctl command encoding: 32 bits total, command in lower 16 bits,
+ * size of the parameter structure in the upper 14 bits.
+ * Encoding size in ioctl request is useful for catching old versions
+ * and to avoid overwriting user space outside the user buffer area.
+ * The highest 2 bits are reserved.
+ * NOTE: This limits the max blocksize to 16kB -1 !
+ */
+
+#define IOC_VOID	0x00000000	/* param in size field */
+#define IOC_IN		0x40000000	/* user --> kernel */
+#define IOC_OUT		0x80000000	/* kernel --> user */
+#define IOC_INOUT	(IOC_IN | IOC_OUT)	/* both */
+#define IOCSIZE_MASK	0x3fff0000	/* size (max 16k-1 bytes) */
+#define IOCSIZE_SHIFT	16		/* how to get the size */
+#define IOCCMD_MASK	0x0000ffff	/* command code */
+#define IOCCMD_SHIFT	0
+
+#define _IO(c,d)	(IOC_VOID | (d)<<16) | c) /* param encoded */
+/* use _IOXX(magic, subcode, arg_t) where arg_t is the type of the
+ * (last) argument field in the ioctl call, if present.
+ */
+#define _IOW(c,d,t)	(IOC_IN | ((sizeof(t)<<16) & IOCSIZE_MASK) | \
+				  (c<<8) | d)
+#define _IOR(c,d,t)	(IOC_OUT | ((sizeof(t)<<16) & IOCSIZE_MASK) | \
+				   (c<<8) | d)
+/* WR rather than RW to avoid conflict with stdio.h */
+#define _IOWR(c,d,t)	(IOC_INOUT | (sizeof(t)<<16) & IOCSIZE_MASK) | \
+				     (c<<8) | d)
+
+extern int ioctl(int, int, ...);
+
+#endif