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Operating Systems Linux How to easily identify socket given a PID on Linux? Post 302995480 by drysdalk on Thursday 6th of April 2017 06:29:51 AM
Old 04-06-2017
Hi,

The difficult part here would be coming up with a generic solution, since what you need from each netstat output would appear to depend on actual human knowledge of which of the listening ports is the 'correct' one. From a technical perspective, they all are: PID 32538 really is listening on ports 7666 and 38970 on all bound IPs, and on port 13804 on the IP 10.2.228.79 specifically.

So aside from you knowing which of these is the one you want, you'd need some way of identifying something that the ports you're after will actually always have in common, if you want a generic scriptable run-one-command-and-get-the-answer solution. Is there something you would always look for or which would be scriptably identifiable as the signifier of which port was the 'correct' one ? If so, then if you can give a bit more detail we may be able to narrow this down further.

As for the fd command - I've never heard of that one, sorry. Doesn't seem to either be installed or to be an option for installation on any Linux or Solaris system I currently have access to.
 

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APLAYMIDI(1)						      General Commands Manual						      APLAYMIDI(1)

NAME
aplaymidi - play Standard MIDI Files SYNOPSIS
aplaymidi -p client:port[,...] [-d delay] midifile ... DESCRIPTION
aplaymidi is a command-line utility that plays the specified MIDI file(s) to one or more ALSA sequencer ports. OPTIONS
-h, --help Prints a list of options. -V, --version Prints the current version. -l, --list Prints a list of possible output ports. -p, --port=client:port,... Sets the sequencer port(s) to which the events in the MIDI file(s) are sent. A client can be specified by its number, its name, or a prefix of its name. A port is specified by its number; for port 0 of a client, the ":0" part of the port specification can be omitted. Multiple ports can be specified to allow playback of MIDI file(s) that contain events for multiple devices (ports), as specified by "Port Number" meta events. For compatibility with pmidi(1), the port specification is taken from the ALSA_OUTPUT_PORTS environment variable if none is given on the command line. -d, --delay=seconds Specifies how long to wait after the end of each MIDI file, to allow the last notes to die away. BUGS
aplaymidi handles "Port Number" meta events, but not "Port Name" meta events. SEE ALSO
pmidi(1) playmidi(1) AUTHOR
Clemens Ladisch <clemens@ladisch.de> 2 Nov 2011 APLAYMIDI(1)
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