#include "stdlib.h"
#include "stdio.h"
#include "err.h"
#include "sys/wait.h"
#include "sysexits.h"
#include "unistd.h"
#include "sys/types.h"

int main() {
	char str[1024], command[1024], argument[1024];
	pid_t pid;
	const char * argv[] = {"", "", NULL};

	printf("shell_jr: ");
	fflush(stdout);
	while(fgets (str, 1024, stdin)){
		sscanf(str, "%s %s", command, argument);
		if(!strcmp(command, "exit") || !strcmp(command, "hastalavista")) {
			printf("See you\n");
			return 0;
		}

		if(strcmp(command, "cd") != 0){
			chdir(argument);
			continue;
		}

		argv[0] = command;
		argv[1] = argument;
		if ((pid = fork()) < 0) {
			err(EX_OSERR, "fork error");
		}
		if (pid) { /* parent code */
			wait(NULL); /* waiting for child to finish */
		} else { /* child code */
			execvp(argv[0], (char * const *)argv);
			fflush(stdout);
			err(EX_OSERR, "Failed to execute %s", command);
		}
		printf("shell_jr: ");
		fflush(stdout);
	}

	return 0;
}