Is there a way to query the name table that epmd daemon manages?
The nodes() function isn't very helpful on that front.
NOTE: I am looking for an API aside from parsing the output generated through stdout.
+3
A:
To query nodes visible for epmd, call:
EpmdModule = net_kernel:epmd_module(). % erl_epmd by default
EpmdModule:names().
To get a list of connected nodes and their ports:
erlang:system_info(dist).
erlang:system_info(dist_ctrl).
The first call returns you the table in a crash dump format. If you are interested in acquiring the actual ports, use the second one.
Zed
2009-09-25 17:52:36
Is this supposed to work with nodes with short-names? That's mostly what I use and I don't get the expected results.
jldupont
2009-09-25 17:56:30
Make sure the nodes are connected, e.g. call net_adm:ping(mynode@localhost). Works for me.
Zed
2009-09-25 17:57:32
I should have been more explicit: I do not want to have to explicitly "connect" the nodes. I just want to know which nodes are reachable within the confines of a "short-name domain".
jldupont
2009-09-25 18:16:50
Sorry, your example with nodes() confused me on what you meant... I added the calls you need on top of the answer.
Zed
2009-09-25 18:40:11
Marvelous! Thanks again Zed!
jldupont
2009-09-25 18:41:17
@zed: you rock!
jldupont
2009-09-25 18:41:50
+2
A:
You get the same answer as Zed's code by doing:
net_adm:names()
I don't know if that is a more standard way of doing it or not.
Rob Charlton
2009-10-26 11:20:33