Changeset 0ee4322 in mainline for uspace/srv/vfs/vfs_ops.c

Timestamp:

2008-01-13T13:19:37Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

d0dc74ae

Parents:

4fb6bf36

Message:

Add ftruncate() and support for VFS_TRUNCATE to VFS and TMPFS.

File:

• uspace/srv/vfs/vfs_ops.c (modified) (1 diff)

uspace/srv/vfs/vfs_ops.c

@@ -690 +690 @@
 }
 
+void vfs_truncate(ipc_callid_t rid, ipc_call_t *request)
+{
+        int fd = IPC_GET_ARG1(*request);
+        size_t size = IPC_GET_ARG2(*request);
+        ipcarg_t rc;
+
+        vfs_file_t *file = vfs_file_get(fd);
+        if (!file) {
+                ipc_answer_0(rid, ENOENT);
+                return;
+        }
+        futex_down(&file->lock);
+
+        rwlock_write_lock(&file->node->contents_rwlock);
+        int fs_phone = vfs_grab_phone(file->node->fs_handle);
+        rc = async_req_3_0(fs_phone, VFS_TRUNCATE, (ipcarg_t)file->node->dev_handle,
+            (ipcarg_t)file->node->index, (ipcarg_t)size);
+        vfs_release_phone(fs_phone);
+        if (rc == EOK)
+                file->node->size = size;
+        rwlock_write_unlock(&file->node->contents_rwlock);
+
+        futex_up(&file->lock);
+
+        return rc;      
+}
+
 atomic_t fs_head_futex = FUTEX_INITIALIZER;
 link_t fs_head;