2660663ff2
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
41 lines
958 B
C
41 lines
958 B
C
/*
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/string.h>
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#include <asm/uaccess.h>
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#include <asm/bug.h>
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long strnlen_user(const char __user *src, long count)
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{
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return strlen(src) + 1;
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}
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#define __do_strncpy_from_user(dst, src, count, res) \
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do { \
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char *tmp; \
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strncpy(dst, src, count); \
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for (tmp = dst; *tmp && count > 0; tmp++, count--) \
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; \
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res = (tmp - dst); \
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} while (0)
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long __strncpy_from_user(char *dst, const char __user *src, long count)
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{
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long res;
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__do_strncpy_from_user(dst, src, count, res);
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return res;
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}
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long strncpy_from_user(char *dst, const char __user *src, long count)
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{
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long res = -EFAULT;
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if (access_ok(VERIFY_READ, src, 1))
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__do_strncpy_from_user(dst, src, count, res);
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return res;
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}
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