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BSD 4.0

#include	<stdio.h>

setbuf(iop, buf)
register struct _iobuf *iop;
char *buf;
{
	if (iop->_base != NULL && iop->_flag&_IOMYBUF)
		free(iop->_base);
	iop->_flag &= ~(_IOMYBUF|_IONBF|_IOLBF);
	if ((iop->_base = buf) == NULL)
		iop->_flag |= _IONBF;
	else
		iop->_ptr = iop->_base;
	iop->_cnt = 0;
}

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