AIX PID associated with open network connections

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How can I find the AIX PID associated with open network connections?
This can be done quite easily with a small shell script and the utility 'lsof'. This utility can be obtained from the Linux Toolkit for AIX CD, The AIX toolbox for Linux on the web at
http://www.ibm.com/servers/aix/products/aixos/linux/
, or from
ftp://vic.cc.purdue.edu/pub/

With this utility you can get process information for any open file and the ports are treated by UNIX as open files.
How can I find the AIX PID associated with open network connections?  
This can be done quite easily with a small shell script and the utility 'lsof'. This utility can be obtained from the Linux Toolkit for AIX CD, The AIX toolbox for Linux on the web at
http://www.ibm.com/servers/aix/products/aixos/linux/
, or from
ftp://vic.cc.purdue.edu/pub/

With this utility you can get process information for any open file and the ports are treated by UNIX as open files. To look at the process information for say port
lsof -i | grep 5901
Xvnc      33152 jwtesch    6u  IPv4 0x7006d1f0      0t0  TCP *:5901 (LISTEN)
This can be useful if you find a port with a lot of network traffic that may be hurting the performance, but don't know the process that is using the port.
For a complete list of all the processes that are using the network you can use the following script.
Shell script source
#!/bin/ksh
#script title=/tmp/port-process.ksh
netstat -a|grep LISTEN|awk '{print $4}'>/tmp/port.list
for PORT in `cat /tmp/port.list`
  do
    /usr/sbin/lsof -i | grep $PORT
  done
echo "script exection $0 completed"
Sample Output
inetd     12540    root   11u  IPv4 0x701ef9f0      0t0  TCP *:daytime (LISTEN)
inetd     12540    root   14u  IPv4 0x701e8400      0t0  UDP *:daytime
inetd     12540    root    4u  IPv6 0x7006e9f0      0t0  TCP *:ftp (LISTEN)
sshd      10944    root    3u  IPv4 0x7006ddf0      0t0  TCP *:ssh (LISTEN)
inetd     12540    root    5u  IPv6 0x701ecdf0      0t0  TCP *:telnet (LISTEN)
sendmail  33648    root    9u  IPv4 0x704159f0      0t0  TCP *:smtp (LISTEN)
inetd     12540    root   12u  IPv4 0x701ef5f0      0t0  TCP *:time (LISTEN)
inetd     12540    root   15u  IPv4 0x701e8700      0t0  UDP *:time
httpd      9322  nobody   16u  IPv4 0x703535f0      0t0  TCP *:www (LISTEN)
httpd     11100    root   16u  IPv4 0x703535f0      0t0  TCP *:www (LISTEN)
snmpdv3ne 16336    root   10u  IPv4 0x7006e5f0      0t0  TCP *:smux (LISTEN)
db2sysc   20648 ldapdb2   48u  IPv4 0x702f15f0      0t0  TCP *:ldapdb2svc (LISTEN)
slapd     37666    ldap   19u  IPv4 0x702b5df0      0t0  TCP *:ldap (LISTEN)
inetd     12540    root    8u  IPv6 0x701ec1f0      0t0  TCP *:login (LISTEN)
inetd     12540    root    6u  IPv6 0x701ec9f0      0t0  TCP *:shell (LISTEN)
lpd        5700    root    3u  IPv4 0x702cadf0      0t0  TCP *:printer (LISTEN)
inetd     12540    root    9u  IPv4 0x701efdf0      0t0  TCP *:klogin (LISTEN)
inetd     12540    root    7u  IPv4 0x701ec5f0      0t0  TCP *:kshell (LISTEN)
rmcd      18598    root   10u  IPv4 0x702ca9f0      0t0  TCP *:rmc (LISTEN)
writesrv   8858    root    3u  IPv4 0x702675f0      0t0  TCP *:writesrv (LISTEN)
httpdlite 17808  imnadm    3u  IPv4 0x702671f0      0t0  TCP loopback:49213 (LISTEN)
httpd      9322  nobody    4u  IPv4 0x703389f0   0t2966  TCP loopback:1022->loopback:995 (ESTABLISHED)
secldapcl 24342    root    3u  IPv4 0x70324df0      0t0  TCP loopback:995 (LISTEN)
secldapcl 24342    root   12u  IPv4 0x7032a5f0   0t3106  TCP loopback:995->loopback:1023 (ESTABLISHED)
httpd     33496  nobody    4u  IPv4 0x703389f0   0t2966  TCP loopback:1022->loopback:995 (ESTABLISHED)
sendmail  33648    root    5u  IPv4 0x702d21f0     0t52  TCP loopback:1016->loopback:995 (ESTABLISHED)
ksh       35098    root    6u  IPv4 0x7035f5f0   0t2966  TCP loopback:1021->loopback:995 (ESTABLISHED)
sshd      42418 jwtesch    3u  IPv4 0x7031ddf0   0t3106  TCP loopback:1023->loopback:995 (ESTABLISHED)
httpd     42912  nobody    4u  IPv4 0x703389f0   0t2966  TCP loopback:1022->loopback:995 (ESTABLISHED)
Xvnc      33152 jwtesch    7u  IPv4 0x703f69f0      0t0  TCP *:5801 (LISTEN)
Xvnc      33152 jwtesch    6u  IPv4 0x7006d1f0      0t0  TCP *:5901 (LISTEN)
X          2950    root    8u  IPv4 0x70075df0      0t0  TCP *:6000 (LISTEN)
Xvnc      33152 jwtesch    4u  IPv4 0x702899f0      0t0  TCP *:6001 (LISTEN)
inetd     12540    root   16u  IPv4 0x701ef1f0      0t0  TCP *:dtspc (LISTEN)
X          2950    root    6u  IPv4 0x701eadf0      0t0  TCP *:32768 (LISTEN)
dtlogin    3188    root    6u  IPv4 0x701eadf0      0t0  TCP *:32768 (LISTEN)
inetd     12540    root   19u  IPv4 0x701ee9f0      0t0  TCP *:32769 (LISTEN)
rpc.ttdbs 29676    root    0u  IPv4 0x701ee9f0      0t0  TCP *:32769 (LISTEN)
snmpdv3ne 16336    root    8u  IPv4 0x7006edf0      0t0  TCP *:32770 (LISTEN)
inetd     12540    root   18u  IPv4 0x701f4e00      0t0  UDP *:32776
ttsession 28176 jwtesch    5u  IPv4 0x702f95f0      0t0  TCP *:32796 (LISTEN)
dtsession  7874 jwtesch   11u  IPv4 0x703f31f0      0t0  TCP *:32800 (LISTEN)
dtwm      29930 jwtesch   11u  IPv4 0x703ea5f0      0t0  TCP *:32803 (LISTEN)
dtexec    34864 jwtesch    5u  IPv4 0x703f79f0      0t0  TCP *:32964 (LISTEN)
inetd     12540    root   17u  IPv4 0x701eedf0      0t0  TCP *:wsmserver (LISTEN)
script exection portproc.sh completed

The full article can be found on IBM Techlink DB:
http://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/TD101221



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