Comment 3 for bug 1881588

i dont think there is a snap command to get the managed state (there is "snap known system-user" but that seems to only work if the user was actually created with an assertion)

if you actually want shell instead of a simple python http query:

root@pi4:~# cat is-managed.sh
#! /bin/sh

query_snapd() {
  RET="$(/bin/echo -e 'GET /v2/'"$1"' HTTP/1.0\r\n\r\n' | \
           nc -U /var/run/snapd.socket -q0 2>&1 | \
           grep -oP '(^.*"'"$2"'":)[^,]*' | \
           grep -o '[^:]*$')"
  echo "$RET" | sed 's/\]//g;s/\}//g;s/\"//g'
}

echo "System is managed: $(query_snapd system-info managed)"
echo "By user: $(query_snapd users email)"
root@pi4:~# ./is-managed.sh
System is managed: true
By user: <email address hidden>