117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*
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* Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
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* Copyright (c) 1993 NeXT Computer, Inc.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/conf.h>
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#include <sys/kauth.h>
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#include <sys/ucred.h>
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#include <sys/proc_internal.h>
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#include <sys/user.h>
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#include <kern/task.h>
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#include <kern/thread.h>
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#include <vm/vm_map.h>
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#include <machine/machine_routines.h>
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/*
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* copy a null terminated string from the kernel address space into
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* the user address space.
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* - if the user is denied write access, return EFAULT.
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* - if the end of string isn't found before
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* maxlen bytes are copied, return ENAMETOOLONG,
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* indicating an incomplete copy.
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* - otherwise, return 0, indicating success.
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* the number of bytes copied is always returned in lencopied.
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*/
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int
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copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t *lencopied)
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{
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size_t slen;
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size_t len;
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int error = 0;
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slen = strlen(from) + 1;
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if (slen > maxlen) {
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error = ENAMETOOLONG;
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}
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len = min(maxlen, slen);
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if (copyout(from, to, len)) {
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error = EFAULT;
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}
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*lencopied = len;
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return error;
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}
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/*
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* copy a null terminated string from one point to another in
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* the kernel address space.
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* - no access checks are performed.
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* - if the end of string isn't found before
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* maxlen bytes are copied, return ENAMETOOLONG,
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* indicating an incomplete copy.
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* - otherwise, return 0, indicating success.
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* the number of bytes copied is always returned in lencopied.
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*/
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/* from ppc/fault_copy.c -Titan1T4 VERSION */
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int
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copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
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{
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size_t l;
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char const *from = (char const *) vfrom;
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char *to = (char *) vto;
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for (l = 0; l < maxlen; l++) {
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if ((*to++ = *from++) == '\0') {
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if (lencopied) {
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*lencopied = l + 1;
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}
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return 0;
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}
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}
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if (lencopied) {
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*lencopied = maxlen;
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}
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return ENAMETOOLONG;
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}
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int
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copywithin(void *src, void *dst, size_t count)
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{
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bcopy(src, dst, count);
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return 0;
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}
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