에러가 나는 원인이 궁금합니다..

#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#define MAX_CMD_ARG 10
 
const char *prompt = "myshell> ";
char* cmdvector[MAX_CMD_ARG];
char  cmdline[BUFSIZ];
 
void fatal(char *str)
{
	perror(str);
	exit(1);
}
 
void command_cd(char* path)
{
	chdir(path);
}
 
int makelist(char *s, const char *delimiters, char** list, int MAX_LIST)
{	
  	int i = 0;
  	int numtokens = 0;
  	char *snew = NULL;
 
  	if((s==NULL) || (delimiters==NULL))
	{
		return -1;
	}
 
	snew = s + strspn(s, delimiters);	
  	if((list[numtokens] = strtok(snew, delimiters)) == NULL )
    	{
		return numtokens;
	}
 
  	numtokens = 1;
 
  	while(1)
	{
	     	if((list[numtokens] = strtok(NULL, delimiters)) == NULL)
		{
			break;
		}
     		if(numtokens == (MAX_LIST-1))
		{ 
			return -1;
		}		
     		numtokens++;
  	}	
 
	return numtokens;
}
 
int main(int argc, char**argv)
{
  	int i = 0;
  	pid_t pid;
  	while (1) 
	{      
  		fputs(prompt, stdout);
		fgets(cmdline, BUFSIZ, stdin);
		cmdline[ strlen(cmdline) -1] ='\0';
 
		makelist(cmdline, " \t", cmdvector, MAX_CMD_ARG);
 
		if(!strcmp(cmdline, "exit"))
		{
			exit(1);
		}
		if(!strcmp(cmdvector[0], "cd"))
		{
			command_cd(cmdvector[1]);
		}
 
		switch(pid=fork())
		{
		case 0:
			makelist(cmdline, " \t", cmdvector, MAX_CMD_ARG);
			execvp(cmdvector[0], cmdvector);
			fatal("main()");
		case -1:
  			fatal("main()");
		default:
			wait(NULL);
		}
 
  	}
  	return 0;
}