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 | */ |
31 | int |
32 | copyoutstr(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 */ |
59 | int |
60 | copystr(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 | |
78 | int |
79 | copywithin(void *src, void *dst, size_t count) |
80 | { |
81 | bcopy(src, dst, count); |
82 | return 0; |
83 | } |
84 | |