libio/stdio/setfileno.c

   1 /* Some known programs (xterm, pdksh?) non-portably change the _file
   2    field of s struct _iobuf.  This kludge allows the same "functionality".
   3    This code is an undocumented feature for iostream/stdio. Use it at
   4    your own risk. */
   5
   6 #include "libioP.h"
   7 #include "stdio.h"
   8
   9 void
  10 setfileno(fp, fd)
  11      _IO_FILE* fp;
  12      int fd;
  13 {
  14   CHECK_FILE(fp, );
  15   if ((fp->_flags & _IO_IS_FILEBUF) != 0)
  16     fp->_fileno = fd;
  17 }