yongsing
asked on
Check whether port is used
We are using a report server that listens on port 8001. If we start the report server (through a script) a second time, it will fail because port 8001 is already taken up by the first instance. How can I modify my script to check that the port is already taken up, so that I won't start the server again?
I can use telnet, but it's going to prompt me to enter something. All I need is to check that the server is listening on that port.
I can use telnet, but it's going to prompt me to enter something. All I need is to check that the server is listening on that port.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Hanno P.S.
Status like idle, listen, established shwo that somthing bound to it already.
If you are looking for a certain port for a given process ID (pid) use
# pfiles $pid | grep "sockname:" | grep "port:" | awk '{print $NF}'`
If you need a report for ALL ports, run this script:
#!/bin/ksh
for pid in `ps -ef -o pid | tail +2` ; do
port=`pfiles $pid 2>&1 | grep "sockname:" | grep "port:" | awk '{print $NF}'` > /dev/null
[ ! -z "$port" ] && echo "`pfiles $pid 2>&1 | grep \"^$pid:\"` => `echo $port`"
done
JustUNIX
# pfiles $pid | grep "sockname:" | grep "port:" | awk '{print $NF}'`
If you need a report for ALL ports, run this script:
#!/bin/ksh
for pid in `ps -ef -o pid | tail +2` ; do
port=`pfiles $pid 2>&1 | grep "sockname:" | grep "port:" | awk '{print $NF}'` > /dev/null
[ ! -z "$port" ] && echo "`pfiles $pid 2>&1 | grep \"^$pid:\"` => `echo $port`"
done
JustUNIX