/* SPDX-License-Identifier: ISC */
#include "init.h"

static void handle_signal(int signo)
{
	int status;
	pid_t pid;

	switch (signo) {
	case SIGCHLD:
		while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
			status = WIFEXITED(status) ? WEXITSTATUS(status) :
						     EXIT_FAILURE;

			supervisor_handle_exited(pid, status);
		}
		break;
	case SIGTERM:
		supervisor_set_target(TGT_SHUTDOWN);
		break;
	case SIGINT:
		supervisor_set_target(TGT_REBOOT);
		break;
	case SIGHUP:
		break;
	case SIGUSR1:
		break;
	}
}

void target_completed(int target)
{
	switch (target) {
	case TGT_BOOT:
		break;
	case TGT_SHUTDOWN:
		for (;;)
			reboot(RB_POWER_OFF);
		break;
	case TGT_REBOOT:
		for (;;)
			reboot(RB_AUTOBOOT);
		break;
	}
}

int main(void)
{
	struct sigaction act;

	supervisor_init();

	memset(&act, 0, sizeof(act));
	act.sa_handler = handle_signal;

	sigaction(SIGCHLD, &act, NULL);
	sigaction(SIGTERM, &act, NULL);
	sigaction(SIGINT, &act, NULL);
	sigaction(SIGHUP, &act, NULL);
	sigaction(SIGUSR1, &act, NULL);

	if (reboot(LINUX_REBOOT_CMD_CAD_OFF))
		perror("cannot disable CTRL+ALT+DEL");

	for (;;) {
		while (supervisor_process_queues())
			;

		pause();
	}

	return EXIT_SUCCESS;
}