How to show all processes in Erlang?

Question

I need get all registered process. I input register(). a

 mnesia_event,kernel_safe_sup,mnesia_monitor,mnesia_snmp_sup,
 mnesia_recover,mnesia_late_loader,mnesia_kernel_sup,inet_db,
 rex,kernel_sup,global_name_server,mnesia_checkpoint_sup,
 file_server_2,user,error_logger,global_group,mnesia_locker,
 standard_error_sup,popd_listener_sup,pop_fsm_sup,dets_sup,
 smtpd_listener_sup,disk_log_sup,disk_log_server,dets|...]

How can i get all names registered process, without | ...] (truncation)?

Thank you.

score 56 · Answer 1 · answered Mar 24 '11 at 09:25

56

> rp(registered()). Documentation here

answered Mar 24 '11 at 09:25

D.Nibon

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+1 for the best solution to this, I missed rp() for a short way to display all of a structure without typing io:format abominations all the time. Thanks for pointing it out! – Peer Stritzinger Mar 24 '11 at 11:07

score 14 · Accepted Answer · answered Mar 24 '11 at 06:21

14

registered() is returning all the processes, but the shell is truncating output.

you can print the result to see everything:

io:format("~p~n", [registered()]).

answered Mar 24 '11 at 06:21

butter71

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score 12 · Answer 3 · answered Nov 17 '17 at 17:47

As long as your are in shell you can use regs():

1> regs().

** Registered procs on node nonode@nohost **
Name                  Pid          Initial Call                      Reds Msgs
application_controlle <0.33.0>     erlang:apply/2                   65717    0
code_server           <0.38.0>     erlang:apply/2                  592348    0
disk_log_server       <0.129.0>    disk_log_server:init/1             323    0
disk_log_sup          <0.128.0>    supervisor:disk_log_sup/1          367    0
dtls_connection_sup   <0.70.0>     supervisor:dtls_connectio           84    0
dtls_udp_sup          <0.71.0>     supervisor:dtls_udp_sup/1           81    0
erl_prim_loader       <0.6.0>      erlang:apply/2                24923843    0
erl_signal_server     <0.46.0>     gen_event:init_it/6                 51    0
...

** Registered ports on node nonode@nohost **
Name                  Id              Command
ok

Any way to know which process causing cpu load..? – tumbudu Nov 22 '17 at 09:21 — tumbudu, Nov 22 '17 at 09:21
@knocker not really sure about that! – Yan Foto Nov 22 '17 at 09:24 — Yan Foto, Nov 22 '17 at 09:24

score 4 · Answer 4 · answered Mar 24 '11 at 06:22

4

I believe the easiest way is:

> io:write(registered()).

answered Mar 24 '11 at 06:22

hdima

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I raise you with `rp(registered()).` [Doc](http://www.erlang.org/doc/man/shell.html) – D.Nibon Mar 24 '11 at 08:34
@D.Nibbon: Why not write your own answer so we can upvote it properly? – Peer Stritzinger Mar 24 '11 at 09:03

How to show all processes in Erlang?

4 Answers4

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