U2-Python as a Phantom in UniData/AIX

Pedro,

While any non-interactibive process initiated from a UniVerse shell can be started as a PHANTOM or iPHANTOM, if you want to start a process from UNIX then typically you would use the & symbol to post a command to background from a shell. e.g.

whoami&

If you want to monitor the output you would use redirects to send the output to files for stdout and stderr - e.g.

whomi 1>process_out 2>process.err&

Additionally if you want the process to continue running after you log out then use either disown at any rime or nohup when the job is launched - e.g.

nohup whomi 1>process_out 2>process.err&

or

disown %1

You might also want to look at the jobs and at commands.

As a caution - any PHANTOM job that uses the UniVerse socket functionaity becomes an iPHANTOM and takes a UniVerse license. I haven't tried the indirect method of having a UniVerse PHANTOM process call Python to perform a socket function to see whether it does the same in practise, though in theory ANY interactive funstionality invoked froma PHANTOM should account for a license - on paper if not physicslly.

I should mention that UniVerse has it's own socket functionality. The only time I found that I needed to 'step out' for socket functionality was when I was writing real-time comms. applications where real-time rapid processing and turnaround at the byte level and connection state change was absolutely essential and every microsecond counted. On those occasions I was using C as Python (even if it were available at the time) would have been too slow and not all the socket functionality I was using is implemented in even  the current Python libtatoes.. .

Hoping this helps

JJ

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John Jenkins
Thame, Oxfordshire
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