subyte(9r) [osf1 man page]

subyte(9r)																subyte(9r)

NAME

       subyte - General: Writes a byte into user address space

SYNOPSIS

       int subyte(
	       char *user_dest,
	       char byte );

ARGUMENTS

       Specifies the address in user space to write the byte.  Specifies the byte to be written.

DESCRIPTION

       The subyte routine copies 1 byte from the protected kernel address space to the unprotected user address space.

RETURN VALUES

       Upon  successful  completion, subyte returns the value 0 (zero).  Otherwise, it returns a -1, indicating that the user address specified in
       user_dest could not be accessed.

SEE ALSO

       Routines: copyout(9r), copyoutstr(9r), fubyte(9r), fuword(9r), suword(9r)

																	subyte(9r)

STORE(9)						   BSD Kernel Developer's Manual						  STORE(9)

NAME

     store, subyte, suswintr, suword -- store data to user-space

SYNOPSIS

     #include <sys/types.h>
     #include <sys/time.h>
     #include <sys/systm.h>

     int
     subyte(void *base, int byte);

     int
     suword(void *base, long word);

     int
     suword16(void *base, int word);

     int
     suword32(void *base, int32_t word);

     int
     suword64(void *base, int64_t word);

     #include <sys/resourcevar.h>

     int
     suswintr(void *base, int word);

DESCRIPTION

     The store functions are designed to copy small amounts of data to user-space.

     The store routines provide the following functionality:

     subyte()	 Stores a byte of data to the user-space address base.

     suword()	 Stores a word of data to the user-space address base.

     suword16()  Stores 16 bits of of data to the user-space address base.

     suword32()  Stores 32 bits of of data to the user-space address base.

     suword64()  Stores 64 bits of of data to the user-space address base.

     suswintr()  Stores a short word of data to the user-space address base.  This function is safe to call during an interrupt context.

RETURN VALUES

     The store functions return 0 on success or -1 on failure.

SEE ALSO

     copy(9), fetch(9)

BSD
								  October 5, 2009							       BSD