show uts

clin@lima-default:/tmp/lima/container-core$ sudo ./uts_namespace.o
main process
in child process
# hostname
new_host
# exit
end process

add IPC isolate to uts_namespace.c file

clin@lima-default:/tmp/lima/container-core$ ipcmk -Q   =======> create a new MQ
Message queue id: 0
clin@lima-default:/tmp/lima/container-core$ ipcs -q    =======> you can see the new MQ

------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages
0x0e2fdfcc 0          clin       644        0            0

clin@lima-default:/tmp/lima/container-core$ sudo ./ipc_namespace.o
main process
in child process
root@new_host:/tmp/lima/container-core# ipcs -q        ========> in child process you can't see it

------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages

root@new_host:/tmp/lima/container-core# exit
exit
end process
clin@lima-default:/tmp/lima/container-core$

clin@lima-default:/tmp/lima/container-core$ sudo ./pid_namespace.o
main process
in child process
root@new_host:/tmp/lima/container-core# echo $$
1
root@new_host:/tmp/lima/container-core# exit
exit
end process
clin@lima-default:/tmp/lima/container-core$ echo $$
1929
clin@lima-default:/tmp/lima/container-core$