Hi Harley,
No, io:format is not printf.
If you check io:format/3 it takes an i/o device pid as the first
argument. If the argument is omitted io:format will use the group
leader.
To do output on the remote node do either:
a)
RP = rpc:call(per@REDACTED,erlang,list_to_pid,["<0.0.0>"]),
io:format(RP,"Hello World !\n",[]).
b)
LP = erlang:group_leader(),
RP = rpc:call(per@REDACTED,erlang,list_to_pid,["<0.0.0>"]),
erlang:group_leader(RP,self()),
io:format("Hello World !\n"),
erlang:group_leader(LP,self()).
To do low level output use erlang:display.
/Per
> On Wed, 1 May 2002, Harley Gorrell wrote:
> > Spawning on the node works just fine. What should I look
> > at to figure out what is wrong?
>
> I received two replies, to this note which also went to
> this list. Thanks Andreas and Lennart!
>
> After reading them, I checked again that the cookie was
> correct (is was) and tried out the 'net_adm:ping' function
> which I hadnt known about. With ping I could then see a
> non-null list from nodes(). So I knew erlang was setup ok.
>
> After a bit more tinkering, I found that the call was
> indeed making the round trip, but the output of 'io:format'
> was appearing on the console of the spawning node. I was
> thinking that the output would appear on the remote node.
>
> Here is an example. 'echo:hi/1' is loaded on 'foo2@REDACTED'
> with 'c(echo)'. From a new erl, I spawn the function and
> the output appears locally.
>
> --------------------
>
> $erl -sname foo1
> Erlang (BEAM) emulator version 5.1 [source]
>
> Eshell V5.1 (abort with ^G)
> (foo1@REDACTED)1> spawn(foo2@REDACTED,echo,hi,[foo2]).
> hi2 'foo2'
> <38.48.0>
> (foo1@REDACTED)2>
>
> --------------------
>
> Moral: 'io:format' is not 'printf'.
>
> thanks everyone,
> harley.
>
=========================================================
Per Bergqvist
Synapse Systems AB
Phone: +46 709 686 685
Email: per@REDACTED