<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>You could always package the program as a release & use the start/stop commands. Might be overkill but does also give you console & attach.</div><div><br></div><div>Ivan<br><br>--<br>festina lente<div><br></div></div><div><br>On 21 Oct 2013, at 13:09, Michael Scofield <<a href="mailto:bayinamine@gmail.com">bayinamine@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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Hi all! I'm new to erlang for a few month. <br>
<br>
Recently I've developed a small pure erlang program, and it runs
well in the shell. Now I want to run it in the background, as a
daemon service process in the os (mine is Ubuntu 12.04 64bit with
R16B). So I googled "run erlang without shell", and google gave me
some advice:<br>
<br>
1. Using escript. -This is what erlang official faq suggested (
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charset=ISO-8859-1">
<a href="http://www.erlang.org/faq/how_do_i.html">http://www.erlang.org/faq/how_do_i.html</a>).
<br>
2. erl -detached -s Module Function Args<br>
<br>
I tried both. As to #1, my escript goes to<br>
<br>
#!/usr/bin/env escript<br>
main(_) -><br>
my_supervisor:start_link(arg1, arg2).<br>
<br>
I ran it using "nohup ./my-escript &", and it didn't run my
code. =(<br>
<br>
So I went to #2. I was acknowledged that "-s" can only pass 0 or 1
argument, so I wrapped my supervisor using<br>
<br>
-module(run).<br>
-export([start/0]).<br>
<br>
start() -><br>
my_supervisor:start_link(arg1, arg2).<br>
<br>
and ran my code as "erl -detached -s run start". But this was also a
dead end. <br>
<br>
I guessed it's because the run:start/0 just returned and finished
the shell(Is it?), so I added a line to the run:start/0:<br>
<br>
-module(run).<br>
-export([start/0]).<br>
<br>
start() -><br>
my_supervisor:start_link(arg1, arg2),<br>
<b>receive after infinity -> stop end.</b><br>
<br>
And executed "erl -detached -s run start", and everything goes fine!
my_supervisor started to work without the shell!<br>
<br>
Though the problem "solved", I'm very very confused.<br>
1. Why the "magic line" solved my problem?<br>
2. What exactly is the proper or right way to run an erlang
application in the background as the command "nohup ... &" does?<br>
<br>
Thanks in advance!<br>
<br>
Michael<br>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>erlang-questions mailing list</span><br><span><a href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a></span><br><span><a href="http://erlang.org/mailman/listinfo/erlang-questions">http://erlang.org/mailman/listinfo/erlang-questions</a></span><br></div></blockquote></body></html>