Get opened port with given PID?

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# 1  
Old 07-20-2011
Get opened port with given PID?

i want to get tomcat listening port , from a command.

ps -ef | grep catalina | grep -v "grep catalina" | grep -v "catalina.out" | awk '{print $2}' | head -1

output : 

Now with this 1234 i need to know , in which port my tomcat is running...

i tried ,
netstat -ao | grep "1234"
lsof -p 1234

fuser 8080/tcp

will give the exact output with pid.

But i need pid as input and port as output

is there any other way ?
# 2  
Old 07-20-2011
What do you mean by
But i need pid as input and port as output

Do you want to write an interactive script with some read commands or... ? What do you mean by input and output? For which tool/script is this input/output?
Please explain what you want to achieve, thanks.
# 3  
Old 07-20-2011
i am sorry if its my mistake.

My need is to get tomcat listening port through a shell script.
# 4  
Old 07-20-2011
You can it do the way you already did or check the server.xml of your Tomcat where the ports are defined in and grep it out of there. When having the port(s), you can just check additionally with
netstat -an| grep <port>

if it is up and running.
The way you have chosen, you do not know how many Tomcat installations/configurations are there, but just check which is up and try to get it's port.
It depends which way you want to go.
# 5  
Old 07-20-2011
Originally Posted by linuxadmin
But i need pid as input and port as output

is there any other way ?
You should be able to grep the port tomcat is listening on from the output of lsof
# 6  
Old 07-21-2011
Originally Posted by shamrock
You should be able to grep the port tomcat is listening on from the output of lsof
Dear shamrock, i tried as you told
[root@linux ~]# lsof | grep 8080
automount  2867      root  mem       REG       8,11      98080    1006186 /usr/lib/autofs/

And zaxxon, what you told is correct only. I can get it from server.xml file.
But my problem is : we have to use this script in a number of servers. And the server.xml file may be manually edited. There will be http & https connections also. The part <Connector port="portNum" will edit manually. And there is a chance to change the alignment also.
[root@linux ~]# grep 8080 /tomcat6/apache-tomcat-6.0.18/conf/server.xml
         Define a non-SSL HTTP/1.1 Connector on port 8080
    <Connector port="8080" protocol="HTTP/1.1" 
               port="8080" protocol="HTTP/1.1"

So upto my knowledge , there is only one way , that to GET the PORT number from PROCESS id.
[root@linux ~]# ps -ef | grep tomcat
root      7976     1  0 Jul18 ?        00:22:11 /usr/java/jdk1.6.0_13/bin/java -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=/tomcat6/apache-tomcat-6.0.18/conf/ -verbose:gc -XX:+PrintGCDetails -XX:MaxPermSize=512M -Xms1024M -Xmx1024M -Djava.awt.headless=true -XX:+UseParallelOldGC -XX:+UseParallelGC -Djava.endorsed.dirs=/tomcat6/apache-tomcat-6.0.18/endorsed -classpath :/tomcat6/apache-tomcat-6.0.18/bin/bootstrap.jar -Dcatalina.base=/tomcat6/apache-tomcat-6.0.18 -Dcatalina.home=/tomcat6/apache-tomcat-6.0.18 org.apache.catalina.startup.Bootstrap start
root     28214 28183  0 10:02 pts/1    00:00:00 grep tomcat

[root@linux ~]# ps -ef | grep catalina | grep -v "grep catalina" |  grep -v "catalina.out"|awk '{print $2}' | head -1

[root@linux ~]# fuser 8080/tcp
8080/tcp:             7976       -->> I need vice-versa of this. That is , by giving process id , i should get port number. I tried by grep of fuser but i couldn't find.

# 7  
Old 07-21-2011
Shamrock's idea is correct and good. The only difference is, that if you want an absolute list of ports of configured ports (not only those that are currently up and running), you will not get it by checking which processes are there, since it could be, that one of them is down for maintenance or similar.
For the problem of the format the server.xml could be in due to manual editing, I would try to run following via ssh from one box that has hopefully access to all others so you don't have to log in into each of them. For stuff like this I usually do something like the following (of course depending they are in a similar directory - else you have to think about how to find those server.xml in different locations):

$> cat server.list
$> while read S; do ssh -n -o "ConnectTimeout=3" -o "BatchMode yes" $S "cat ~tomcat/conf/server.xml" | sed -n 's/.*Connector port="\([^"]*\)" .*/\1/p'

On a box where 3 instances of Tomcat are running, I get something like:

Which are up and running you could get the other way with ps and lsof.
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