From e9a0ca4df1ad6f733723584c2769e65a848bb185 Mon Sep 17 00:00:00 2001
From: h2-addad <hamza2.addad@live.uwe.ac.uk>
Date: Sun, 16 Jul 2023 01:05:09 +0000
Subject: [PATCH] Update
---
src/filesys/filesys.c | 103 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100644 src/filesys/filesys.c
diff --git a/src/filesys/filesys.c b/src/filesys/filesys.c
new file mode 100644
index 0000000..a7ed2e5
--- /dev/null
+++ b/src/filesys/filesys.c
@@ -0,0 +1,103 @@
+#include "filesys/filesys.h"
+#include <debug.h>
+#include <stdio.h>
+#include <string.h>
+#include "filesys/file.h"
+#include "filesys/free-map.h"
+#include "filesys/inode.h"
+#include "filesys/directory.h"
+
+/* Partition that contains the file system. */
+struct block *fs_device;
+
+static void do_format (void);
+
+/* Initializes the file system module.
+ If FORMAT is true, reformats the file system. */
+void
+filesys_init (bool format)
+{
+ fs_device = block_get_role (BLOCK_FILESYS);
+ if (fs_device == NULL)
+ PANIC ("No file system device found, can't initialize file system.");
+
+ inode_init ();
+ free_map_init ();
+
+ if (format)
+ do_format ();
+
+ free_map_open ();
+}
+
+/* Shuts down the file system module, writing any unwritten data
+ to disk. */
+void
+filesys_done (void)
+{
+ free_map_close ();
+}
+
+/* Creates a file named NAME with the given INITIAL_SIZE.
+ Returns true if successful, false otherwise.
+ Fails if a file named NAME already exists,
+ or if internal memory allocation fails. */
+bool
+filesys_create (const char *name, off_t initial_size)
+{
+ block_sector_t inode_sector = 0;
+ struct dir *dir = dir_open_root ();
+ bool success = (dir != NULL
+ && free_map_allocate (1, &inode_sector)
+ && inode_create (inode_sector, initial_size)
+ && dir_add (dir, name, inode_sector));
+ if (!success && inode_sector != 0)
+ free_map_release (inode_sector, 1);
+ dir_close (dir);
+
+ return success;
+}
+
+/* Opens the file with the given NAME.
+ Returns the new file if successful or a null pointer
+ otherwise.
+ Fails if no file named NAME exists,
+ or if an internal memory allocation fails. */
+struct file *
+filesys_open (const char *name)
+{
+ struct dir *dir = dir_open_root ();
+ struct inode *inode = NULL;
+
+ if (dir != NULL)
+ dir_lookup (dir, name, &inode);
+ dir_close (dir);
+
+ return file_open (inode);
+}
+
+/* Deletes the file named NAME.
+ Returns true if successful, false on failure.
+ Fails if no file named NAME exists,
+ or if an internal memory allocation fails. */
+bool
+filesys_remove (const char *name)
+{
+ struct dir *dir = dir_open_root ();
+ bool success = dir != NULL && dir_remove (dir, name);
+ dir_close (dir);
+
+ return success;
+}
+
+/* Formats the file system. */
+static void
+do_format (void)
+{
+ printf ("Formatting file system...");
+ free_map_create ();
+ if (!dir_create (ROOT_DIR_SECTOR, 16))
+ PANIC ("root directory creation failed");
+ free_map_close ();
+ printf ("done.\n");
+}
--
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