write eof without closing

[cwarren89 at gmail.com]

Writing the binary value for ^D into the stream will not do anything.
That value signals the shell to close the stream, as such it only has
significance when you're typing something into the shell.

To the OP: writing an EOF to a stream without closing it makes no
sense. EOF means just that--end of file. Once the program reaches an
EOF, it can't read any more values from the stream, so keeping it open
to write more stuff into it wouldn't even work.