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Delete PID file on exit 

Register an exit notifier to remove the PID file. By the time atexit()
is called, qemu_write_pidfile() guarantees QEMU owns the PID file,
thus we could safely remove it when exiting.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20180907121319.8607-4-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-09-07 16:13:19 +04:00 committed by Paolo Bonzini
parent 61a9346f60
commit 90a84d131c
1 changed files with 13 additions and 1 deletions
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14
vl.c
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@ -2560,6 +2560,16 @@ static void qemu_run_exit_notifiers(void)
notifier_list_notify(&exit_notifiers, NULL);
}
static const char *pid_file;
static Notifier qemu_unlink_pidfile_notifier;
static void qemu_unlink_pidfile(Notifier *n, void *data)
{
if (pid_file) {
unlink(pid_file);
}
}
bool machine_init_done;
void qemu_add_machine_init_done_notifier(Notifier *notify)
@ -2884,7 +2894,6 @@ int main(int argc, char **argv, char **envp)
const char *vga_model = NULL;
const char *qtest_chrdev = NULL;
const char *qtest_log = NULL;
const char *pid_file = NULL;
const char *incoming = NULL;
bool userconfig = true;
bool nographic = false;
@ -3911,6 +3920,9 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
qemu_unlink_pidfile_notifier.notify = qemu_unlink_pidfile;
qemu_add_exit_notifier(&qemu_unlink_pidfile_notifier);
if (qemu_init_main_loop(&main_loop_err)) {
error_report_err(main_loop_err);
exit(1);