X-Git-Url: https://git.ucc.asn.au/?p=tpg%2Facess2.git;a=blobdiff_plain;f=KernelLand%2FKernel%2Finclude%2Fvfs_ext.h;fp=KernelLand%2FKernel%2Finclude%2Fvfs_ext.h;h=42d986549cdc50e7dada4118350a700c5bbbe717;hp=65a81624d1df05a5a23ee9609b253cc1edf9f26b;hb=845b6f9d90bb87b5e760e4d49aa93b0e003ab750;hpb=67a7fe2bb79eceaf10c572a99bd8345c4e81cf5b

diff --git a/KernelLand/Kernel/include/vfs_ext.h b/KernelLand/Kernel/include/vfs_ext.h
index 65a81624..42d98654 100644
--- a/KernelLand/Kernel/include/vfs_ext.h
+++ b/KernelLand/Kernel/include/vfs_ext.h
@@ -226,6 +226,20 @@ extern int	VFS_DuplicateFD(int SrcFD, int DstFD);
  */
 extern int	VFS_SetFDFlags(int FD, int Mask, int Value);
 
+/**
+ * \brief Save specified file handle such that it can be passed between processes
+ * \param FD	File descriptor to save
+ * \return Marshalled handle, or (uint64_t)-1 on error
+ */
+extern Uint64	VFS_MarshalHandle(int FD);
+
+/**
+ * \brief Restore a marshalled handle into the current process
+ * \param Handle returned by VFS_MarshalHandle
+ * \return File descriptor, or -1 on error
+ */
+extern int	VFS_UnmarshalHandle(Uint64 Handle);
+
 /**
  * \brief Get file information from an open file
  * \param FD	File handle returned by ::VFS_Open
@@ -314,6 +328,16 @@ extern size_t	VFS_ReadAt(int FD, Uint64 Offset, size_t Length, void *Buffer);
  */
 extern size_t	VFS_WriteAt(int FD, Uint64 Offset, size_t Length, const void *Buffer);
 
+/**
+ * \brief Set the valid size of a file
+ * \param FD	File descriptor
+ * \param Size	New file size
+ * \return Actual new file size (-1 if error occurred)
+ *
+ * \note Not all files support this call (will return ENOTIMPL)
+ */
+extern off_t	VFS_Truncate(int FD, off_t Size);
+
 /**
  * \brief Sends an IOCtl request to the driver
  * \param FD	File handle returned by ::VFS_Open