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BSD 3.0

#include <stdio.h>
FILE *_dofpip(iodes)
int iodes;
{
	register FILE *p;

	for(p=_iob; (p->_flag&(_IOWRT|_IOREAD))!=0; p++)
		if (p >= _iob+_NFILE)
			return(NULL);
	p->_file = iodes;
	p->_cnt = 0;
	p->_base = p->_ptr = NULL;
	return(p);
}

FILE * fpipe(info)
FILE *info[2];
{
	register FILE *p;
	int descrips[2];

	if(0 > pipe(descrips)) return( (FILE *) -1);

	if(NULL==(p = _dofpip(descrips[0]))) return( (FILE *) -1);
	p->_flag = (_IONBF|_IOREAD);
	info[0] = p;

	if(NULL==(p = _dofpip(descrips[1]))) return( (FILE *) -1);
	p->_flag = _IOWRT;
	info[1] = p;
	return((FILE *) 2); /*indicate sucess*/
}

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