Re: [basex-talk] Trying to get process details on macOS

Hi Eliot - hope you're well!

Quickly off the cuff, the `ps` command on MacOS is a BSD-flavo(u)r, if I'm remembering correctly (it's been a while...).

I don't have a Mac handy right now, but check this `ps` man page - https://ss64.com/osx/ps.html - your args may need to be adjusted.

Hope that's helpful. Best, Bridger

On Thu, Oct 19, 2023, 7:08 PM Eliot Kimber eliot.kimber@servicenow.com wrote:

In the context of a 10.6 server running as a web app, I’m trying to implement a function that uses the process module to run commands to get information about the running BaseX servers, in particular, the PID and port each server is on. I start a number of “worker” BaseXHTTP instances to handle long-running processes.

On Linux this code works:

let $cmdResult := proc:execute(‘ps’, ('-o', 'pid,%cpu,command'))

From which I can parse out the PID and port for BaseX processes:

let $lines as xs:string* := ($cmdResult/output/text() => tokenize('
'))

return

map{

'data' :

  let $servers as map(*) := map:merge(

    for $line at $p in $lines[contains(., 'BaseXHTTP')]

    let $pid as xs:string := tokenize($line, '\s+')[1]

    let $port as xs:string := tokenize(substring-after($line, '

-p'),'\s+')[1]

    return map{ $port :

                  map{

                    'port' : $port,

                    'pid'  : $pid

                  }

              }

  )

  return $servers

}

However, on macOS there’s not an exact equivalent of the linux version of ps, but there is the “pgrep” command, which, from the command line, lets me get the data I need:

pgrep -lf basex

However, when I try to run this from within BaseX, I get “sysmon request failed with error: sysmond service not found pgrep: Cannot get process list”

I assume this is a function of how the HTTP servers are running on macOS. I’m starting them like so:

"${basexBinDir}/basexhttp" ${debugFlag} -S -p${clientPort} -h${httpPort} -s${stopPort} &

So as a service

Any ideas how I might make this work on mapOS?

Thanks,

Eliot

---

*Eliot Kimber*

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