1/*
2 * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
3 */
4/*
5 * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
6 * Copyright (c) 1993 NeXT Computer, Inc.
7 *
8 */
9
10#include <sys/param.h>
11#include <sys/systm.h>
12#include <sys/ioctl.h>
13#include <sys/tty.h>
14#include <sys/conf.h>
15#include <sys/kauth.h>
16#include <sys/ucred.h>
17#include <sys/proc_internal.h>
18#include <sys/user.h>
19#include <kern/task.h>
20#include <kern/thread.h>
21#include <vm/vm_map.h>
22
23/*
24 * copy a null terminated string from the kernel address space into the user
25 * address space. - if the user is denied write access, return EFAULT. - if
26 * the end of string isn't found before maxlen bytes are copied, return
27 * ENAMETOOLONG, indicating an incomplete copy. - otherwise, return 0,
28 * indicating success. the number of bytes copied is always returned in
29 * lencopied.
30 */
31int
32copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t * lencopied)
33{
34 size_t slen;
35 size_t len;
36 int error = 0;
37
38 slen = strlen(from) + 1;
39 if (slen > maxlen)
40 error = ENAMETOOLONG;
41
42 len = min(maxlen, slen);
43 if (copyout(from, to, len))
44 error = EFAULT;
45 *lencopied = len;
46
47 return error;
48}
49
50
51/*
52 * copy a null terminated string from one point to another in the kernel
53 * address space. - no access checks are performed. - if the end of string
54 * isn't found before maxlen bytes are copied, return ENAMETOOLONG,
55 * indicating an incomplete copy. - otherwise, return 0, indicating success.
56 * the number of bytes copied is always returned in lencopied.
57 */
58/* from ppc/fault_copy.c -Titan1T4 VERSION */
59int
60copystr(const void *vfrom, void *vto, size_t maxlen, size_t * lencopied)
61{
62 size_t l;
63 char const *from = (char const *) vfrom;
64 char *to = (char *) vto;
65
66 for (l = 0; l < maxlen; l++) {
67 if ((*to++ = *from++) == '\0') {
68 if (lencopied)
69 *lencopied = l + 1;
70 return 0;
71 }
72 }
73 if (lencopied)
74 *lencopied = maxlen;
75 return ENAMETOOLONG;
76}
77
78int
79copywithin(void *src, void *dst, size_t count)
80{
81 bcopy(src, dst, count);
82 return 0;
83}
84