/*
* Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*/
/*
* Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
* Copyright (c) 1993 NeXT Computer, Inc.
*
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/kauth.h>
#include <sys/ucred.h>
#include <sys/proc_internal.h>
#include <sys/sysproto.h>
#include <sys/user.h>
#include <kern/task.h>
#include <kern/thread.h>
#include <vm/vm_map.h>
/*
* copy a null terminated string from the kernel address space into the user
* address space. - if the user is denied write access, return EFAULT. - if
* the end of string isn't found before maxlen bytes are copied, return
* ENAMETOOLONG, indicating an incomplete copy. - otherwise, return 0,
* indicating success. the number of bytes copied is always returned in
* lencopied.
*/
int
copyoutstr(const void *from, user_addr_t to, size_t maxlen, size_t * lencopied)
{
size_t slen;
size_t len;
int error = copyoutstr_prevalidate(from, to, maxlen);
if (__improbable(error)) {
return error;
}
slen = strlen(from) + 1;
if (slen > maxlen) {
error = ENAMETOOLONG;
}
len = MIN(maxlen, slen);
if (copyout(from, to, len)) {
error = EFAULT;
}
*lencopied = len;
return error;
}
/*
* copy a null terminated string from one point to another in the kernel
* address space. - no access checks are performed. - if the end of string
* isn't found before maxlen bytes are copied, return ENAMETOOLONG,
* indicating an incomplete copy. - otherwise, return 0, indicating success.
* the number of bytes copied is always returned in lencopied.
*/
/* from ppc/fault_copy.c -Titan1T4 VERSION */
int
copystr(const void *vfrom, void *vto, size_t maxlen, size_t * lencopied)
{
size_t l;
char const *from = (char const *) vfrom;
char *to = (char *) vto;
for (l = 0; l < maxlen; l++) {
if ((*to++ = *from++) == '\0') {
if (lencopied) {
*lencopied = l + 1;
}
return 0;
}
}
if (lencopied) {
*lencopied = maxlen;
}
return ENAMETOOLONG;
}
int
copywithin(void *src, void *dst, size_t count)
{
bcopy(src, dst, count);
return 0;
}