UNIX 7th Ed. - /usr/src/libc/stdio/setbuf.c

   1: #include    <stdio.h>
   2: 
   3: setbuf(iop, buf)
   4: register struct _iobuf *iop;
   5: char *buf;
   6: {
   7:     if (iop->_base != NULL && iop->_flag&_IOMYBUF)
   8:         free(iop->_base);
   9:     iop->_flag &= ~(_IOMYBUF|_IONBF);
  10:     if ((iop->_base = buf) == NULL)
  11:         iop->_flag |= _IONBF;
  12:     else
  13:         iop->_ptr = iop->_base;
  14:     iop->_cnt = 0;
  15: }

Defined functions