Describe the issue
I want to run JackTrip in Shadow. JackTrip is an Audio over IP software that uses the JACK sound server as audio backend. JACK uses shared memory and usually wants to set its realtime priority. Both doesn't seem to work in Shadow. It looks like a semaphore function is missing too.

What needs to be done getting this to work?

server.jackd.1000.stderr:

sched_get_priority_min() failed.
Cannot set scheduling priority for messagebuffer thread: Invalid argument (22)
Cannot set scheduling priority for messagebuffer thread: Invalid argument (22)
Cannot set scheduling priority for messagebuffer thread: Invalid argument (22)
JACK semaphore error: semget creation (Function not implemented)
jack_shm_lock_registry fails...
No access to shm registry
Failed to open server

To Reproduce
Install JACK and JackTrip (on Fedora 36):

sudo dnf swap pipewire-jack-audio-connection-kit jack-audio-connection-kit
sudo dnf install jacktrip

shadow.yml:

general:
  stop_time: 30s
  model_unblocked_syscall_latency: true

network:
  graph:
    type: 1_gbit_switch

hosts:
  server:
    network_node_id: 0
    processes:
    - path: /usr/bin/jackd
      args: -r -d dummy --rate 48000 --period 128
      start_time: 3s
    - path: /usr/local/bin/jacktrip
      args: -S -z -p4 -q auto -I 1
      start_time: 7s
  client:
    network_node_id: 0
    quantity: 3
    processes:
    - path: /usr/bin/jackd
      args: -r -d dummy --rate 48000 --period 128
      start_time: 5s
    - path: /usr/local/bin/jacktrip
      args: -C server -z -q auto
      start_time: 10s

Operating System (please complete the following information):

• OS and version: Fedora release 36 (Thirty Six)
• Kernel version: Linux newmark 5.18.19-200.fc36.x86_64 set minimum network latency #1 SMP PREEMPT_DYNAMIC Sun Aug 21 15:52:59 UTC 2022 x86_64

Shadow (please complete the following information):

• Version: Shadow v2.2.0-227-g9614fca0 2022-08-29--13:50:24