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#include <unistd.h>
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#define	NONEXIT	34
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void (*_atexitfns[NONEXIT])(void);
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void _doatexits(void){
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	int i;
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	void (*f)(void);
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	for(i = NONEXIT-1; i >= 0; i--)
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		if(_atexitfns[i]){
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			f = _atexitfns[i];
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			_atexitfns[i] = 0;	/* self defense against bozos */
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			(*f)();
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		}
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}
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void exit(int status)
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{
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	_doatexits();
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	_exit(status);
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}