split strtok_r and saved the first argument as the pro_name

established the setup_stack to include the argv and argc

src/userprog/process.c

@@ -36,13 +36,17 @@ process_execute (const char *file_name)
   fn_copy = palloc_get_page (0);
   if (fn_copy == NULL)
     return TID_ERROR;
+
+  char *save_ptr, *pro_name; /*extracting file name from cmd*/
   strlcpy (fn_copy, file_name, PGSIZE);           
+  pro_name = strtok_r(file_name, " ", &save_ptr);/*cuts the file_name and saves the first argument as real name */
 
   /* Create a new thread to execute FILE_NAME. */
-  tid = thread_create (file_name, PRI_DEFAULT, start_process, fn_copy);
+  tid = thread_create (pro_name, PRI_DEFAULT, start_process, fn_copy);
 
-  if (tid == TID_ERROR)
+  if (tid == TID_ERROR){
     palloc_free_page (fn_copy);
+}
   return tid;
   }
 
@@ -119,6 +123,7 @@ process_exit (void)
       pagedir_activate (NULL);
       pagedir_destroy (pd);
     }
+  printf ("%s: exit(%d)\n", cur->name, cur->exit_code); /*prints out program name and exit code*/
 }
 
 /* Sets up the CPU for running user code in the current
@@ -197,10 +202,12 @@ struct Elf32_Phdr
 
 /* Flags for p_flags.  See [ELF3] 2-3 and 2-4. */
 #define PF_X 1          /* Executable. */
-#define PF_W 2          /* Writable. */
+/bin/bash: :q: command not found
 #define PF_R 4          /* Readable. */
 
-static bool setup_stack (void **esp);
+static bool setup_stack (void **esp, char **argv, int argc);/* argv(listing all arguments)
+							       argc(no. of arguments passed including program name*/
+
 static bool validate_segment (const struct Elf32_Phdr *, struct file *);
 static bool load_segment (struct file *file, off_t ofs, uint8_t *upage,
                           uint32_t read_bytes, uint32_t zero_bytes,
@@ -219,6 +226,24 @@ load (const char *file_name, void (**eip) (void), void **esp)
   off_t file_ofs;
   bool success = false;
   int i;
+  struct kernel_thread_frame *kf
+
+  char file_name_echo[100];
+  strlcpy(file_name_echo, file_name, 100);
+  char *pro_name = file_name;
+  char *argv[255];
+  int argc;
+  char *save_ptr;
+
+  argv[0] = strtok_r(file_name, " ", &save_ptr);
+
+  if (DEBUG) printf("1st strtok_r\n);
+  char *token;
+  argc = 1;
+
+  while((token = strtok_r(NULL, " ", &save_ptr))!=NULL){
+	  argv[argc++] = token;
+  }
 
   /* Allocate and activate page directory. */
   t->pagedir = pagedir_create ();
@@ -231,7 +256,6 @@ load (const char *file_name, void (**eip) (void), void **esp)
 
   if (file == NULL) 
     {
-	printf ("load: %s: open failed\n", file_name);
       goto done; 
     }
 
@@ -308,7 +332,7 @@ load (const char *file_name, void (**eip) (void), void **esp)
     }
 
   /* Set up stack. */
-  if (!setup_stack (esp))
+  if (!setup_stack (esp, argv, argc))
     goto done;
 
   /* Start address. */
@@ -433,7 +457,7 @@ load_segment (struct file *file, off_t ofs, uint8_t *upage,
 /* Create a minimal stack by mapping a zeroed page at the top of
    user virtual memory. */
 static bool
-setup_stack (void **esp) 
+setup_stack (void **esp, char **argv, int argc) 
 {
   uint8_t *kpage;
   bool success = false;
@@ -444,6 +468,10 @@ setup_stack (void **esp)
       success = install_page (((uint8_t *) PHYS_BASE) - PGSIZE, kpage, true);
       if (success) {
         *esp = PHYS_BASE;
+	int i = argc;
+	uint32_t *arr[argc];
+
+
       } else
         palloc_free_page (kpage);
     }