osf1 man page for copyin

copyin(9r)																copyin(9r)

NAME
       copyin - General: Copies data from a user address space to a kernel address space

SYNOPSIS
       int copyin(
	       caddr_t user_src,
	       caddr_t kernel_dest,
	       u_int bcount );

ARGUMENTS
       Specifies  the  address	in user space of the data to be copied.  Specifies the address in kernel space to copy the data to.  Specifies the
       number of bytes to copy.

DESCRIPTION
       The copyin routine copies a specified amount of data from the unprotected user address space to the protected kernel address space.

RETURN VALUES
       Upon successful completion, copyin returns a value of 0 (zero). Otherwise, it can return the following error: The  address  in  user  space
       that you specified in the user_src argument cannot be accessed.

SEE ALSO
       Routines: copyinstr(9r), copyout(9r)

																	copyin(9r)