1/*
2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
30 * Copyright (c) 1993 NeXT Computer, Inc.
31 *
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/ioctl.h>
37#include <sys/tty.h>
38#include <sys/conf.h>
39#include <sys/kauth.h>
40#include <sys/ucred.h>
41#include <sys/proc_internal.h>
42#include <sys/user.h>
43#include <kern/task.h>
44#include <kern/thread.h>
45#include <vm/vm_map.h>
46#include <machine/machine_routines.h>
47
48/*
49 * copy a null terminated string from the kernel address space into
50 * the user address space.
51 * - if the user is denied write access, return EFAULT.
52 * - if the end of string isn't found before
53 * maxlen bytes are copied, return ENAMETOOLONG,
54 * indicating an incomplete copy.
55 * - otherwise, return 0, indicating success.
56 * the number of bytes copied is always returned in lencopied.
57 */
58int
59copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied)
60{
61 size_t slen;
62 size_t len;
63 int error = 0;
64
65 slen = strlen(from) + 1;
66 if (slen > maxlen)
67 error = ENAMETOOLONG;
68
69 len = min(maxlen,slen);
70 if (copyout(from, to, len))
71 error = EFAULT;
72 *lencopied = len;
73
74 return error;
75}
76
77
78/*
79 * copy a null terminated string from one point to another in
80 * the kernel address space.
81 * - no access checks are performed.
82 * - if the end of string isn't found before
83 * maxlen bytes are copied, return ENAMETOOLONG,
84 * indicating an incomplete copy.
85 * - otherwise, return 0, indicating success.
86 * the number of bytes copied is always returned in lencopied.
87 */
88/* from ppc/fault_copy.c -Titan1T4 VERSION */
89int
90copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
91{
92 size_t l;
93 char const *from = (char const *) vfrom;
94 char *to = (char *) vto;
95
96 for (l = 0; l < maxlen; l++) {
97 if ((*to++ = *from++) == '\0') {
98 if (lencopied)
99 *lencopied = l + 1;
100 return 0;
101 }
102 }
103 if (lencopied)
104 *lencopied = maxlen;
105 return ENAMETOOLONG;
106}
107
108int
109copywithin(void *src, void *dst, size_t count)
110{
111 bcopy(src,dst,count);
112 return 0;
113}
114