shell.cc

#include "command.hh"
#include "signal.h"
#include "stdlib.h"
#include "stdio.h"
#include <sys/types.h>
#include <sys/wait.h>

extern char * history [];

void yyrestart(FILE * file);
int yyparse(void);

extern "C" void ctrlC (int sig) {
	printf("\nctrl c works\n");
	Command::_currentCommand.prompt();
}

extern "C" void zombie(int sig) {
	int pid = wait3(0, 0, NULL);
	while (waitpid(-1, NULL, WNOHANG) > 0);
}

int main() {
	struct sigaction sigA1;
	sigA1.sa_handler = ctrlC;
	sigemptyset(&sigA1.sa_mask);
	sigA1.sa_flags = SA_RESTART;
	int error = sigaction(SIGINT, &sigA1, NULL);
	if(error){
		perror("sigaction");
		exit(-1);
	}

	//Zombie Process
	struct sigaction sigA2;
	sigA2.sa_handler = zombie;
	sigemptyset(&sigA2.sa_mask);
	sigA2.sa_flags = SA_RESTART;
	error =  sigaction(SIGCHLD, &sigA2, NULL);
	if (error) {
		perror("sigaction");
		exit(-1);
	}

	FILE* fd = fopen(".shellrc", "r");
		if (fd) {
			yyrestart(fd);
			yyparse();
			yyrestart(stdin);
			fclose(fd);
		}
		else{
			Command::_currentCommand.prompt();
		}
	//Command::_currentCommand.prompt();
	yyparse();

	/*
	for(int i = 0; i < 1024; i++){
		if(history[i] != NULL){
			free(history[i]);
		}
	}
	*/
}