lua - dofile, how fill stdin from lua?

2
votes

http://www.lua.org/manual/5.1/manual.html#pdf-dofile tells

dofile ([filename])

Opens the named file and executes its contents as a Lua chunk. When called without arguments, dofile executes the contents of the standard input (stdin). Returns all values returned by the chunk. In case of errors, dofile propagates the error to its caller (that is, dofile does not run in protected mode).

How fill stdin from lua for case when called without arguments?

2
lua

2 Answers

1
votes

If you're running a lua script or the lua interpreter in interactive mode from a command shell, calling dofile() will just get input from stdin. You'll see a blinking cursor in the shell where you can enter the lua code you want to run.

Note, running dofile in this fashion is a blocking calling, which means execution flow in your script or the lua interpreter will pause until it reads eof. Usually this means you have to enter Ctrl + Z under windows or Ctrl + D under *nix bash shell at the end.

0
votes

This is an example:

-bash-4.0$ ./lua
Lua 5.3.0 (alpha)  Copyright (C) 1994-2014 Lua.org, PUC-Rio
> dofile()
a = 3; print(a)
3
>

After inputting a = 3; print(a), I pressed Ctrl + D, which represents EOF on Unix. dofile() loads the input and executes it.