1 .\" $NetBSD: copy.9,v 1.2 1996/01/09 03:23:04 thorpej Exp $
3 .\" Copyright (c) 1996 Jason R. Thorpe.
4 .\" All rights reserved.
6 .\" This code is derived from software contributed by Kenneth Stailey.
8 .\" Redistribution and use in source and binary forms, with or without
9 .\" modification, are permitted provided that the following conditions
11 .\" 1. Redistributions of source code must retain the above copyright
12 .\" notice, this list of conditions and the following disclaimer.
13 .\" 2. Redistributions in binary form must reproduce the above copyright
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16 .\" 3. All advertising materials mentioning features or use of this software
17 .\" must display the following acknowledgement:
18 .\" This product includes software developed for the NetBSD Project
19 .\" by Jason R. Thorpe.
20 .\" 4. The name of the author may not be used to endorse or promote products
21 .\" derived from this software without specific prior written permission.
23 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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46 .Nd kernel copy functions
51 .Fn copyin "const void *uaddr" "void *kaddr" "size_t len"
53 .Fn copyout "const void *kaddr" "void *uaddr" "size_t len"
55 .Fn copystr "const void *kfaddr" "void *kdaddr" "size_t len" "size_t *done"
57 .Fn copyinstr "const void *uaddr" "void *kaddr" "size_t len" "size_t *done"
59 .\" .Fn copyoutstr "const void *kaddr" "void *uaddr" "size_t len" "size_t *done"
63 functions are designed to copy contiguous data from one address
67 copy data from user-space to kernel-space or vice-versa.
71 routines provide the following functionality:
72 .Bl -tag -width "copyoutstr()"
76 bytes of data from the user-space address
78 to the kernel-space address
83 bytes of data from the kernel-space address
85 to the user-space address
88 Copies a NUL-terminated string, at most
90 bytes long, from kernel-space address
92 to kernel-space address
94 The number of bytes actually copied, including the terminating
100 .No non- Ns Dv NULL ) .
102 Copies a NUL-terminated string, at most
104 bytes long, from user-space address
106 to kernel-space address
108 The number of bytes actually copied, including the terminating
114 .No non- Ns Dv NULL ) .
115 .\" .It Fn copyoutstr
116 .\" Copies a NUL-terminated string, at most
117 .\" bytes long, from kernel-space address
119 .\" to user-space address
121 .\" The number of bytes actually copied, including the terminating
122 .\" NUL, is returned in
128 functions return 0 on success or
130 if a bad address is encountered.
140 if the string is longer than