Isn't there a api to check if a local port is used by another job on iSeries?
There is a command called NETSTAT which will show you who is using local ports. Unfortunately it can only be used interactively and can only create spooled output.
To execute the command do: NETSTAT OPTION(*CNN)
Work with TCP/IP Connection Status
Type options, press Enter.
3=Enable debug 4=End 5=Display details 6=Disable debug
Remote Remote Local Opt Address Port Port Idle Time State * * ftp-con > 000:40:52 Listen * * telnet 000:01:52 Listen * * smtp 000:00:01 Listen * * tftp 018:13:58 *UDP * * sunrpc 518:42:58 Listen * * sunrpc 063:18:20 *UDP * * ntp 000:49:31 *UDP * * netbios > 018:13:58 Listen * * netbios > 000:00:11 *UDP * * netbios > 000:00:13 *UDP * * netbios > 000:02:14 Listen * * snmp 000:12:53 *UDP
F3=Exit F5=Refresh F9=Command line F11=Display byte counts F12=Cancel
F20=Work with IPv6 connections F22=Display entire field F24=More keys
From this screen you can use the F6 key to create spooled output…
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