I want to run an external program, lets call it
program, sequentially piping inputs to its standard input. Lets call the inputs
I then want the standard output of the program to be piped back into memory, for example a Julia data structure, or if this is not possible, written to a text file.
I can run the external program with:
run(`program input_1 input_2`)
which results in the standard output of the program being displayed to the shell.
I however need to feed the inputs sequentially, so cannot use this approach.
I have looked on the External Programs documentation page and I believe I should use the
open function, but I cannot figure out how to use it.
When I run:
the external program complains that it cannot run without an input.
This blog post is quite informative, and I believe something like:
(si,pr) = writesto('program') write(si,input_1) ... write(si, input_2)
might have worked on an older version of Julia, but the
writeto function has been deprecated, as discussed here.
Additionally, I want the program to run in the background. Currently it spawns a new terminal window. I think this might be a function of the external program so I am not sure if this can be specified in Julia.