[Bug 1916343] Re: -daemonize not working on macOS

[Thomas Huth]

The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.

If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".

If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:

1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:

    https://gitlab.com/qemu-project/qemu/-/issues

and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.

2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes
anymore).

Thank you and sorry for the inconvenience.


** Tags added: macos

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1916343

Title:
  -daemonize not working on macOS

Status in QEMU:
  Incomplete

Bug description:
  Basically e.g, if I try with below command on macOS:

  qemu-system-x86_64 \
                     -m 4G \
                     -vga virtio \
                     -display default,show-cursor=on \
                     -usb \
                     -device usb-tablet \
                     -machine type=q35,accel=hvf \
                     -smp 2 \
                     -drive file=ubuntu.qcow2,if=virtio -cpu max \
                     -net nic -net 
user,hostfwd=tcp::50022-:22,hostfwd=tcp::8000-:80 \
                     -daemonize

  With this command, the QEMU processes hang there forever. I guess
  there is a bug when forking a child and kill the parent? Because when
  this issue occurs, there are actually 2 QEMU processes running

  ```
    501 14952 14951   0  7:08PM ??         0:00.00 (qemu-system-x86_)
    501 14953     1   0  7:08PM ??         0:00.03 qemu-system-x86_64 -m 4G 
-vga virtio -display default,show-cursor=on -usb -device usb-tablet -machine 
type=q35,accel=hvf -smp 2 -drive file=ubuntu.qcow2,if=virtio -cpu max -net nic 
-net user,hostfwd=tcp::50022-:22,hostfwd=tcp::8000-:80 -daemonize
    501 14951 14626   0  7:08PM ttys000    0:00.03 qemu-system-x86_64 -m 4G 
-vga virtio -display default,show-cursor=on -usb -device usb-tablet -machine 
type=q35,accel=hvf -smp 2 -drive file=ubuntu.qcow2,if=virtio -cpu max -net nic 
-net user,hostfwd=tcp::50022-:22,hostfwd=tcp::8000-:80 -daemonize
  ```

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