On 12/04/2017 19:02, Markus Armbruster wrote:
>> Note that mingw lacks decent signal
>> support, and will never report a signal because it never calls
>> qemu_system_killed().
>
> Awkward.
ISO C trivia of the day: "kill" is only a POSIX function.
> os-posix.c arranges for SIGINT, SIGHUP and SIGTERM to be caught. Here's
> the handler:
>
> static void termsig_handler(int signal, siginfo_t *info, void *c)
> {
> qemu_system_killed(info->si_signo, info->si_pid);
> }
>
> void qemu_system_killed(int signal, pid_t pid)
> {
> shutdown_signal = signal;
> shutdown_pid = pid;
> no_shutdown = 0;
>
> /* Cannot call qemu_system_shutdown_request directly because
> * we are in a signal handler.
> */
> shutdown_requested = 1;
> qemu_notify_event();
> }
>
> The variables are all int or pid_t. Works in practice (pedants might
> ask for sig_atomic_t, but I won't).
>
> In other words, these three signals are polite requests to terminate
> QEMU.
>
> Stefan, are there equivalent requests under Windows? I guess there
> might be one at least for SIGINT, namely whatever happens when you hit
> ^C on the console.
SIGINT and SIGBREAK exist, so you can just use a termsig_handler which
passes 0 for the pid.
Paolo
