Changeset 623 for trunk/kernel/syscalls/syscalls.h

Timestamp:

Mar 6, 2019, 4:37:15 PM (5 years ago)

Author:

alain

Message:

Introduce three new types of vsegs (KCODE,KDATA,KDEV)
to map the kernel vsegs in the process VSL and GPT.
This now used by both the TSAR and the I86 architectures.

File:

• trunk/kernel/syscalls/syscalls.h (modified) (2 diffs)

trunk/kernel/syscalls/syscalls.h

@@ -236 +236 @@
 /****************************************************************************************** 
  * [15] This function writes bytes to an open file identified by its file descriptor.
- * The file can be a regular file or character oriented device.
+ * The file can be a regular file or character oriented device. For a regular file,
+ * the target inode "size" field is updated if (offset + count) is larger than the
+ * current "size" value. The size value registered in the mappers of the parent(s)
+ * directory are not modified and will be asynchronously updated when the file is closed.
  * IRQs are enabled during this system call.
  ******************************************************************************************
@@ -329 +332 @@
 
 /****************************************************************************************** 
- * [23] This function open a directory, that must exist in the file system, returning 
- * a DIR pointer on the dirent array in user space.
+ * [23] This function creates an user level directory descriptor (including the associated
+ * array of user level dirents), and intialise it from the kernel directory mapper, that
+ * contains all entries in this directory). The directory is identified by the <pathname>
+ * argument. If the corresponding inode is missing in the Inode Tree, the inode is created,
+ * but the directory must exist in the file system. 
+ * It returns a DIR pointer <dirp> on the dirent array in user space.
  ******************************************************************************************
  * @ pathname   : [in]  pathname (can be relative or absolute).