| | 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/cdefs.h> |
| | 11 | #include <sys/param.h> |
| | 12 | #include <sys/systm.h> |
| | 13 | #include <sys/ioctl.h> |
| | 14 | #include <sys/tty.h> |
| | 15 | #include <sys/conf.h> |
| | 16 | #include <sys/kauth.h> |
| | 17 | #include <sys/ucred.h> |
| | 18 | #include <sys/proc_internal.h> |
| | 19 | #include <sys/user.h> |
| | 20 | #include <kern/task.h> |
| | 21 | #include <kern/thread.h> |
| | 22 | #include <vm/vm_map.h> |
| | 23 | |
| | 24 | /* |
| | 25 | * copy a null terminated string from the kernel address space into the user |
| | 26 | * address space. - if the user is denied write access, return EFAULT. - if |
| | 27 | * the end of string isn't found before maxlen bytes are copied, return |
| | 28 | * ENAMETOOLONG, indicating an incomplete copy. - otherwise, return 0, |
| | 29 | * indicating success. the number of bytes copied is always returned in |
| | 30 | * lencopied. |
| | 31 | */ |
| | 32 | int |
| | 33 | copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t * lencopied) |
| | 34 | { |
| | 35 | size_t slen; |
| | 36 | size_t len; |
| | 37 | int error = copyoutstr_prevalidate(from, to, maxlen); |
| | 38 | |
| | 39 | if (__improbable(error)) { |
| | 40 | return error; |
| | 41 | } |
| | 42 | |
| | 43 | slen = strlen(from) + 1; |
| | 44 | if (slen > maxlen) { |
| | 45 | error = ENAMETOOLONG; |
| | 46 | } |
| | 47 | |
| | 48 | len = min(maxlen, slen); |
| | 49 | if (copyout(from, to, len)) { |
| | 50 | error = EFAULT; |
| | 51 | } |
| | 52 | *lencopied = len; |
| | 53 | |
| | 54 | return error; |
| | 55 | } |
| | 56 | |
| | 57 | |
| | 58 | /* |
| | 59 | * copy a null terminated string from one point to another in the kernel |
| | 60 | * address space. - no access checks are performed. - if the end of string |
| | 61 | * isn't found before maxlen bytes are copied, return ENAMETOOLONG, |
| | 62 | * indicating an incomplete copy. - otherwise, return 0, indicating success. |
| | 63 | * the number of bytes copied is always returned in lencopied. |
| | 64 | */ |
| | 65 | /* from ppc/fault_copy.c -Titan1T4 VERSION */ |
| | 66 | int |
| | 67 | copystr(const void *vfrom, void *vto, size_t maxlen, size_t * lencopied) |
| | 68 | { |
| | 69 | size_t l; |
| | 70 | char const *from = (char const *) vfrom; |
| | 71 | char *to = (char *) vto; |
| | 72 | |
| | 73 | for (l = 0; l < maxlen; l++) { |
| | 74 | if ((*to++ = *from++) == '\0') { |
| | 75 | if (lencopied) { |
| | 76 | *lencopied = l + 1; |
| | 77 | } |
| | 78 | return 0; |
| | 79 | } |
| | 80 | } |
| | 81 | if (lencopied) { |
| | 82 | *lencopied = maxlen; |
| | 83 | } |
| | 84 | return ENAMETOOLONG; |
| | 85 | } |
| | 86 | |
| | 87 | int |
| | 88 | copywithin(void *src, void *dst, size_t count) |
| | 89 | { |
| | 90 | bcopy(src, dst, count); |
| | 91 | return 0; |
| | 92 | } |
projects / apple / xnu.git / blame_incremental