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/*
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/string.h>
#include <asm/uaccess.h>
#include <asm/bug.h>
long strnlen_user(const char __user *src, long count)
{
return strlen(src) + 1;
}
#define __do_strncpy_from_user(dst, src, count, res) \
do { \
char *tmp; \
strncpy(dst, src, count); \
for (tmp = dst; *tmp && count > 0; tmp++, count--) \
; \
res = (tmp - dst); \
} while (0)
long __strncpy_from_user(char *dst, const char __user *src, long count)
{
long res;
__do_strncpy_from_user(dst, src, count, res);
return res;
}
long strncpy_from_user(char *dst, const char __user *src, long count)
{
long res = -EFAULT;
if (access_ok(VERIFY_READ, src, 1))
__do_strncpy_from_user(dst, src, count, res);
return res;
}
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