X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Finclude%2Fvfs_ext.h;h=73d82ce58cd4d65643210d48029a123173677a74;hb=86b0974b33759726b99f8940900a88e395247460;hp=65a81624d1df05a5a23ee9609b253cc1edf9f26b;hpb=b7d9f86f7a1c23be18b50d5c647fd5d3c08369c3;p=tpg%2Facess2.git

diff --git a/KernelLand/Kernel/include/vfs_ext.h b/KernelLand/Kernel/include/vfs_ext.h
index 65a81624..73d82ce5 100644
--- a/KernelLand/Kernel/include/vfs_ext.h
+++ b/KernelLand/Kernel/include/vfs_ext.h
@@ -70,6 +70,10 @@ enum eVFS_SeekDirs
  * \}
  */
 
+#define VFS_ACLENT_ALL	0x7FFFFFFF
+#define VFS_GROUP_ANY	{1, VFS_ACLENT_ALL}	//!< Rules for all users
+#define VFS_USER_NOBODY	{0, VFS_ACLENT_ALL}	//!< Rules for nobody
+
 /**
  * \brief MMap protection flags
  * \{
@@ -226,6 +230,20 @@ 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 +332,16 @@ 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