Re: EOF does not work in echo

[Paul Jarc]

"Cai Qian" <loricai@gmail.com> wrote:
> It suggests that "cat" has not seen EOF (004) generated by echo.

The character 004 is not EOF.

When typing at a terminal which is set to "cooked" mode, you use the
keystroke control-D to tell the terminal driver that it should send
EOF to the program reading from the terminal.  Control-D is also used
in other contexts (such as typing at a terminal in "raw" mode) to
produce the character 004.

In the case of a pipe, a reader will not see EOF until all writers
have closed the pipe (typically when they exit).


paul