anuaralfetahe
I would like to execute command on the host machine. I am using the port Module.
I know the file gets executed because the php script is creating log files. But i dont know how to receive the output back to elixir. I can see the data php script outputed only when i use the flush command.
How can i get the data my external programm outputs?
port = Port.open({:spawn, "php filename.php"}, [:binary])
flush()
{#Port<0.14>, {:data, "some data"}}
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vfsoraki
If you just need to run the script and get output, use System.cmd/3. Examples are provided in function documentation, and some notices.
NobbZ
Just
receiveuntil you get a message telling you about the exit of the port.Though as @vfsoraki said, using
System.cmd/3might be more what you actually want.Alternatively you can use
porcelainorrambo.anuaralfetahe
I have tryed
Systemmodule and theporcelainlibrary, they all work similary to thePortmodule and the same problem remains.I can execute my external command. But for some reason I am not getting the output of the exectued script.
However if I use the
flush()in elixir I can actualy see the output :{#Port<0.6>, {:data, "some data"}}Is there any other way besides using the
flushcommand to get the outputed data?NobbZ
As I said, you can use
receiveto receive the ports messages manually.Though I’m wondering why neither
System.cmd/3norporcelaingive you the output, perhaps your tool is only printing output after its stdin has been closed? Then this is exactly whatrambowas made for, give it a try.anuaralfetahe
Thank you all for the answers. I can receive messages from the port with the following code:
receive do {_, {:data, msg}} -> IO.puts(msg) end