MirOS Manual: copy(9), copyin(9), copyinstr(9), copyout(9), copyoutstr(9), copystr(9)

COPY(9)                       BSD Kernel Manual                        COPY(9)

NAME

     copy - kernel copy functions

SYNOPSIS

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

     int
     copyin(void *uaddr, void *kaddr, size_t len);

     int
     copyout(void *kaddr, void *uaddr, size_t len);

     int
     copystr(void *kfaddr, void *kdaddr, size_t len, size_t *done);

     int
     copyinstr(void *uaddr, void *kaddr, size_t len, size_t *done);

     int
     copyoutstr(void *kaddr, void *uaddr, size_t len, size_t *done);

DESCRIPTION

     The copy functions are designed to copy contiguous data from one address
     to another. All but copystr() copy data from user-space to kernel-space
     or vice-versa.

     The copy routines provide the following functionality:

     copyin()      Copies len bytes of data from the user-space address uaddr
                   to the kernel-space address kaddr.

     copyout()     Copies len bytes of data from the kernel-space address
                   kaddr to the user-space address uaddr.

     copystr()     Copies a null-terminated string, at most len bytes long,
                   from kernel-space address kfaddr to kernel-space address
                   kdaddr. The number of bytes actually copied, including the
                   terminating null, is returned in *done.

     copyinstr()   Copies a null-terminated string, at most len bytes long,
                   from user-space address uaddr to kernel-space address
                   kaddr. The number of bytes actually copied, including the
                   terminating null, is returned in *done.

     copyoutstr()  Copies a null-terminated string, at most len bytes long,
                   from kernel-space address kaddr to user-space address
                   uaddr. The number of bytes actually copied, including the
                   terminating null, is returned in *done.

RETURN VALUES

     The copy functions return 0 on success or EFAULT if a bad address is en-
     countered. In addition, the copystr(), copyinstr(), and copyoutstr()
     functions return ENAMETOOLONG if the string is longer than len bytes.

MirOS BSD #10-current          January 7, 1996                               1

Generated on 2014-07-04 21:17:45 by $MirOS: src/scripts/roff2htm,v 1.79 2014/02/10 00:36:11 tg Exp $

These manual pages and other documentation are copyrighted by their respective writers; their source is available at our CVSweb, AnonCVS, and other mirrors. The rest is Copyright © 2002‒2014 The MirOS Project, Germany.
This product includes material provided by Thorsten Glaser.

This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report – diffs preferred.