#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#define SIZE 257
int main(){

	//string for user input to be read to
	char *line;

	//string for line to be copied to, minus the null char
	char input[257];

	//array of strings to be us:q
	//used for execvp
	char *cmd[257];

	//search string for strtok
	char *search = " ";

	//for waitpid
	int status;

	line = malloc (SIZE+1);

	pid_t pid;

	//repeat infinitely
	while(1){
		printf("cmd: ");
		fgets(line, SIZE+1,stdin);

		//get char count of user input
		int i=0;
		while(line[i] != 0){
			i++;
		}

		puts(line);

		//copy line to input, removing null character from end
		strncpy(input,line,i-1);
		//free(line);
		puts(input);

		cmd[0] = strtok(input, " ");

		//if the inputed command is quit, quit
		if (strncmp(cmd[0],"quit",4)==0){
			puts("bye");
			free(line);
			exit(1);
		}

		//tokenize input into cmd
		i=1;
		while(cmd[i] = strtok(NULL, " ")){
			puts("success");
			puts(cmd[i]);
			i++;
		}
		pid = fork();
		if(pid < 0){
			perror("error");
		}
		else if(pid > 0){
			waitpid(-1, &status, 0);
		}
		else{
			if(execvp(cmd[0],cmd)<0){
				perror("exec failed");

			}
		}

	}
		puts("Time to quit");
		return 0;

}