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I have many processes on a box listening on several ports.
I am trying to map ports to pids.
The problem is that lsof is not telling me what ports belong to which process.

Given an apache listening on port 80, I can see it listening via netstat:
user@host% netstat -an|grep LISTEN|grep 80
*.80 *.* 0 0 49152 0 LISTEN

But when I try to map port 80 to a pid I get nothing:
user@host% lsof -iTCP:80 -t

When I try seeing what sockets that specific pid is using I get:
user@host% lsof -lnP -p31 -a -i
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
libhttpd. 31 0 15u IPv4 0x6002d970b80 0t0 TCP *:65535 (LISTEN)

Notice the *:65535 in the NAME column.

Does anyone know why lsof is not reporting the port in use?

I am running as root. I am using a mix of lsof and os versions:
lsof v4.77 on Solaris10 sparc
lsof v4.72 on Redhat4.2
etc

I know that linux solutions can use "netstat -p",
so I guess I'm only looking for why solaris isn't working, but I find lsof is frequently silent and not showing me expected data.

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1 Answer 1

up vote 2 down vote accepted

You'd rather use pfiles which is part of Solaris and supported by Sun, unlike lsof.

Its usage is slightly different as it expects a pid as argument but you can achieve what you want with something like:

pfiles $(pgrep libhttpd)

or even, if you don't know the process name:

pfiles /proc/*  
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pfiles 31 shows me which ip:port it is bound to... that's likely to get me where I need to go... –  ericslaw Mar 18 '10 at 1:36
    
oh dear, this is scary: "[pfiles will] stop their target processes while inspecting them and reporting the results" docs.sun.com/app/docs/doc/816-0210/6m6nb7mh3?a=view that sounds very very bad –  ericslaw Apr 16 '10 at 18:09
    
Indeed, that might be an issue for processes with an extremely large number of open files. Here is a nice alternative that doesn't stop processes: mail-archive.com/dtrace-discuss@opensolaris.org/msg02625.html –  jlliagre Apr 16 '10 at 22:56

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