Nested loop strtok_r issue in C by seperating with ';' and ' '

I want to execute multiple commands like ./shell ls > test.txt;ls > test1.txt;ls > test2.txt; which should print the output 3 times in mentioned files. However, somehow my code only prints once.

I have seperated char buffer by ';' using strtok_r.

Also, I had a look the other example which is similar to my problem. Nested strtok function problem in C

This is my code

int main(int argc,char *argv[])
    {
        if(argc>1)
        {
        /*it will check whether a user has entered exit then the code wil be executed successfully.*/
            if(strcmp( argv[1], "exit")==0)
            {

            exit(EXIT_SUCCESS);

            }


        }

        else
    {

        printf("Enter Shell Command -- ");   
        char buffer[80];

        fgets(buffer, sizeof(buffer), stdin);
        //it will replace the newline character with null
        buffer[strlen(buffer) - 1] = '\0';

        char *end_str;

                char* token= strtok_r(buffer, ";", &end_str);





        /* string will be splited in individual argument array */
        while(token != NULL)
        {

        int i;
        char *endtoken;
        printf("a = %s\n", token);
        char *array[strlen(buffer)];
        i = 0;
        char *token2 = strtok_r(token," ", &endtoken);  
            while (token2 != NULL)
                {
                    array[i++] = token2;
                    token2 = strtok_r(NULL, " ", &endtoken);
                }

        if(sizeof(array)>16)
        {
                    char *arrow=array[strlen(buffer)-1];
                    char *filename;
                    filename=array[strlen(buffer)];
                    /*printf("%s",arrow);
                    printf("%s",filename);*/
                    if(strcmp( arrow, ">") == 0)
                    {
                    freopen( filename, "w", stdout );
                    }
                    else if(strcmp( arrow, "<") == 0)
                    {
                    freopen( filename, "rb", stdin );
                    }


        }   
                splittoarray(buffer,argv);

                call_system(argv,argc);
                token = strtok_r(NULL, ";",&end_str);

    }


    }
    }