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/*
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 * pANS stdio -- rename
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 */
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#include "iolib.h"
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int rename(const char *old, const char *new){
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	if(link((char *)old, (char *)new)<0) return -1;
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	if(unlink((char *)old)<0){
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		unlink((char *)new);
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		return -1;
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	}
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	return 0;
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}