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Full Discussion: Get opened port with given PID?
Top Forums Shell Programming and Scripting Get opened port with given PID? Post 302540501 by linuxadmin on Thursday 21st of July 2011 12:58:45 AM
Old 07-21-2011
Quote:
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
Code:
[root@linux ~]# lsof | grep 8080
automount  2867      root  mem       REG       8,11      98080    1006186 /usr/lib/autofs/lookup_file.so

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.
Code:
[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.
Code:
[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/logging.properties -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 -Djava.io.tmpdir=/tomcat6/apache-tomcat-6.0.18/temp 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
7976

[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.

 

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LEARN ABOUT CENTOS

pldd

PLDD(1)                                                          Linux User Manual                                                         PLDD(1)

NAME

       pldd - display dynamic shared objects linked into a process

SYNOPSIS

       pldd pid
       pldd option

DESCRIPTION

       The  pldd  command  displays a list of the dynamic shared objects that are linked into the process with the specified process ID.  The list
       includes the libraries that have been dynamically loaded using dlopen(3).

OPTIONS

       -?, --help
              Display program help message.

       --usage
              Display a short usage message.

       -V, --version
              Display the program version.

EXIT STATUS

       On success, pldd exits with the status 0.  If the specified process does not exist, the user does not have permission to access its dynamic
       shared  object  list, or no command-line arguments are supplied, pldd exists with a status of 1.  If given an invalid option, it exits with
       the status 64.

VERSIONS

       pldd is available since glibc 2.15.

CONFORMING TO

       The pldd command is not specified by POSIX.1.  Some other systems have a similar command.

NOTES

       The command

           lsof -p PID

       also shows output that includes the dynamic shared objects that are linked into a process.

       The gdb(1) info shared command also shows the shared libraries being used by a process, so that one can obtain similar output to pldd using
       a command such as the following (to monitor the process with the specified pid):

           $ gdb -ex "set confirm off" -ex "set height 0" -ex "info shared" 
                   -ex "quit" -p $pid | grep '^0x.*0x'

BUGS

       Since glibc 2.19, pldd is broken: it just hangs when executed.  It is unclear if it will ever be fixed.

EXAMPLE

       $ echo $$               # Display PID of shell
       1143
       $ pldd $$               # Display DSOs linked into the shell
       1143:     /usr/bin/bash
       linux-vdso.so.1
       /lib64/libtinfo.so.5
       /lib64/libdl.so.2
       /lib64/libc.so.6
       /lib64/ld-linux-x86-64.so.2
       /lib64/libnss_files.so.2

SEE ALSO

       ldd(1), lsof(1), dlopen(3), ld.so(8)

COLOPHON

       This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU                                                                 2017-09-15                                                             PLDD(1)
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