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#include <u.h>
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#include <libc.h>
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char*
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strncpy(char *s1, char *s2, long n)
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{
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	int i;
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	char *os1;
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	os1 = s1;
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	for(i = 0; i < n; i++)
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		if((*s1++ = *s2++) == 0) {
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			while(++i < n)
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				*s1++ = 0;
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			return os1;
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		}
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	return os1;
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}