NAME    [Toc]    [Back]

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

SYNOPSIS    [Toc]    [Back]

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

ARGUMENTS    [Toc]    [Back]

       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    [Toc]    [Back]

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

RETURN VALUES    [Toc]    [Back]

       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    [Toc]    [Back]

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



                                                       copyin(9r)