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C function extending postgres
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* C function extending postgres
@ 2005-03-21 22:46  Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
  0 siblings, 1 reply; 5+ messages in thread

From: Theo Galanakis @ 2005-03-21 22:46 UTC (permalink / raw)
  To: pgsql-sql


#include "postgres.h"
#include "fmgr.h"
#include "proc.h"

PG_FUNCTION_INFO_V1(get_process_total);

Datum
get_process_total(PG_FUNCTION_ARGS)
{
	float ret;
	ret = proc_cpu_user() + proc_cpu_nice() + proc_cpu_system() -
proc_cpu_idle();
	PG_RETURN_FLOAT4(ret);
}

Hi ,

	I'm getting the following error when attempting to call the above
function, I have included the -I path when compiling, and have compiled a
similar function to execute and printf to linux without a problem :

Returned by postgres:
	
	ERROR:  could not load library "/usr/lib/pgsql/processinfo.so":
/usr/lib/pgsql/processinfo.so: undefined symbol: proc_cpu_idle

Compiling:
	cc -g -I /usr/local/pgsql/include -I /usr/local/pgsql/include/server
-I /usr/local/include -fpic -c processinfo.c
	cc -g -I /usr/local/pgsql/include -I /usr/local/pgsql/include/server
-I /usr/local/include -shared -o processinfo.so processinfo.o

Here is the postgres create function:
CREATE FUNCTION get_process_total() RETURNS float4
    AS '$libdir/processinfo', 'get_process_total'
LANGUAGE 'c' STABLE STRICT;

TEST:
select * from get_process_total()

Your help would be greatly appreciated.

Theo



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* Re: C function extending postgres
@ 2005-03-22 00:21  Jonathan Daugherty <cygnus@cprogrammer.org>
  parent: Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
  0 siblings, 0 replies; 5+ messages in thread

From: Jonathan Daugherty @ 2005-03-22 00:21 UTC (permalink / raw)
  To: pgsql-sql

# 	ERROR:  could not load library "/usr/lib/pgsql/processinfo.so":
# /usr/lib/pgsql/processinfo.so: undefined symbol: proc_cpu_idle

My guess that you're not linking against the library that containts
'proc_cpu_idle' when you build your .so.  What's the build platform?

-- 
  Jonathan Daugherty
  Command Prompt, Inc. - http://www.commandprompt.com/
  PostgreSQL Replication & Support Services, (503) 667-4564



^ permalink  raw  reply  [nested|flat] 5+ messages in thread

* Re: C function extending postgres
@ 2005-03-22 05:09  Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
  0 siblings, 1 reply; 5+ messages in thread

From: Theo Galanakis @ 2005-03-22 05:09 UTC (permalink / raw)
  To: Jonathan Daugherty <cygnus@cprogrammer.org>; +Cc: pgsql-sql


Thanks for your feedback.

I'm actually trying to use a system metrics library from
http://www-usr.inf.ufsm.br/~veiga/liblproc/index-en.html

I have tried to link the library however I'm still getting the same message.

cc -g -I /usr/local/pgsql/include -I /usr/local/pgsql/include/server -I
/usr/local/include -fpic -c processinfo.c
cc -g -I /usr/local/pgsql/include -I /usr/local/pgsql/include/server -I
/usr/local/include -shared -llproc -Wall -L/usr/local/include/ -o
processinfo.so processinfo.o



-----Original Message-----
From: Jonathan Daugherty [mailto:cygnus@cprogrammer.org] 
Sent: Tuesday, 22 March 2005 11:21 AM
To: pgsql-sql@postgresql.org
Subject: Re: [SQL] C function extending postgres


# 	ERROR:  could not load library "/usr/lib/pgsql/processinfo.so":
# /usr/lib/pgsql/processinfo.so: undefined symbol: proc_cpu_idle

My guess that you're not linking against the library that containts
'proc_cpu_idle' when you build your .so.  What's the build platform?

-- 
  Jonathan Daugherty
  Command Prompt, Inc. - http://www.commandprompt.com/
  PostgreSQL Replication & Support Services, (503) 667-4564

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^ permalink  raw  reply  [nested|flat] 5+ messages in thread

* Re: C function extending postgres
@ 2005-03-22 05:32  Jonathan Daugherty <cygnus@cprogrammer.org>
  parent: Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
  0 siblings, 0 replies; 5+ messages in thread

From: Jonathan Daugherty @ 2005-03-22 05:32 UTC (permalink / raw)
  To: pgsql-sql

# I'm actually trying to use a system metrics library from
# http://www-usr.inf.ufsm.br/~veiga/liblproc/index-en.html

Have you added the path of the lproc library to your /etc/ld.so.conf?

-- 
  Jonathan Daugherty
  http://www.parsed.org



^ permalink  raw  reply  [nested|flat] 5+ messages in thread

* Re: C function extending postgres
@ 2005-03-22 05:43  Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
  0 siblings, 0 replies; 5+ messages in thread

From: Theo Galanakis @ 2005-03-22 05:43 UTC (permalink / raw)
  To: Jonathan Daugherty <cygnus@cprogrammer.org>; +Cc: pgsql-sql


Sorted Jonathan, thankyou for your help.

-----Original Message-----
From: Jonathan Daugherty [mailto:cygnus@cprogrammer.org] 
Sent: Tuesday, 22 March 2005 4:32 PM
To: pgsql-sql@postgresql.org
Subject: Re: [SQL] C function extending postgres


# I'm actually trying to use a system metrics library from
# http://www-usr.inf.ufsm.br/~veiga/liblproc/index-en.html

Have you added the path of the lproc library to your /etc/ld.so.conf?

-- 
  Jonathan Daugherty
  http://www.parsed.org

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______________________________________________________________________
This email, including attachments, is intended only for the addressee
and may be confidential, privileged and subject to copyright.  If you
have received this email in error, please advise the sender and delete
it.  If you are not the intended recipient of this email, you must not
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communicate to others content that is confidential or subject to 
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^ permalink  raw  reply  [nested|flat] 5+ messages in thread

end of thread, other threads:[~2005-03-22 05:43 UTC | newest]

Thread overview: 5+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2005-03-21 22:46 C function extending postgres Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
2005-03-22 00:21 ` Jonathan Daugherty <cygnus@cprogrammer.org>
2005-03-22 05:09 Re: C function extending postgres Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>
2005-03-22 05:32 ` Jonathan Daugherty <cygnus@cprogrammer.org>
2005-03-22 05:43 Re: C function extending postgres Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>

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