init.c

/*
	init.c:
	main file - WIP small init system 
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

#include "power.h"
#include "startup-scripts.h"


	/* kill zombie processes */
void killZombies(int sig) 
{
	pid_t zombie_pid;
	int zombie_status;

	while ((zombie_pid = waitpid(-1, &zombie_status, WNOHANG)) > 0)
	{
		/* "service monitoring" */
		for (int i = 0; i < service_count; i++)
		{
			if (zombie_pid == services[i].pid && services[i].is_active)
			{
				if (WIFEXITED(zombie_status))				/* if service exited normally */
				{
						printf("[monitor] Service '%s' (PID %d) exited normally with status %d\n",
							services[i].command, services[i].pid, WEXITSTATUS(zombie_status));
				}
				else if (WIFSIGNALED(zombie_status))		/* if service was killed by a signal */
				{
					printf("[monitor] Service '%s' (PID %d) was killed by signal %d\n",
							services[i].command, services[i].pid, WTERMSIG(zombie_status));
				}
				services[i].is_active = 0;			/* mark service dead */
				break;
			}
		}
	}
	return;
}

int main(int argc, char *argv[])
{
	if (argc > 1)
		printf("[info] There are arguments passed to this program\n\n");


	signal(SIGCHLD, killZombies);
	/* power */
	/* (take a look at power.c) */
	signal(SIGTERM, powerControl);
	signal(SIGINT, powerControl);
	signal(SIGHUP, powerControl);

			/* run commands */
	printf("[init] Running start commands\n");
	runCommands();

			/* main loop */
	while (1)
	{
		pause();				// sleep until a signal received
	}



	return 0;	// haha scary
}