* fhandler.cc (fhandler_base::dup): Drop setting flags in the parent.

Implement advisory file locking.
	* cygheap.h (struct init_cygheap): Add inode_list member.
	* cygwin.din (lockf): Export.
	* dcrt0.cc (child_info_spawn::handle_spawn): Call
	fixup_lockf_after_exec.
	* dtable.h (class dtable): Add fhandler_disk_file as friend class.
	* fhandler.cc (fhandler_base::close): Call del_my_locks if node is set.
	(fhandler_base::fhandler_base): Initialize node to NULL.
	(fhandler_base::fixup_after_fork): Ditto.
	* fhandler.h (class fhandler_base): Add member node.
	* fhandler_disk_file.cc (fhandler_disk_file::lock): Delete.
	* flock.cc: Implement all advisory file locking here.
	(fhandler_disk_file::lock): Implement here.
	(flock): Call fcntl with F_FLOCK bit set.  Remove test main function.
	(lockf): New function.
	* fork.cc (frok::child): Call fixup_lockf_after_fork.
	* ntdll.h (DIRECTORY_ALL_ACCESS): Define.
	(struct _OBJECT_BASIC_INFORMATION): Define.
	(enum _EVENT_TYPE): Define.
	(NtCreateDirectoryObject): Declare.
	(NtCreateEvent): Declare.
	(NtCreateMutant): Declare.
	(NtOpenEvent): Declare.
	(NtOpenMutant): Declare.
	* include/cygwin/version.h: Bump API minor number.

winsup/cygwin/ntdll.h

@@ -183,6 +183,7 @@ typedef struct _FILE_ID_BOTH_DIR_INFORMATION
 #define LOCK_VM_IN_RAM 2
 
 #define DIRECTORY_QUERY 1
+#define DIRECTORY_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED|0x0f)
 
 typedef ULONG KAFFINITY;
 
@@ -741,6 +742,21 @@ typedef enum _OBJECT_INFORMATION_CLASS
    // and many more
 } OBJECT_INFORMATION_CLASS;
 
+typedef struct _OBJECT_BASIC_INFORMATION
+{
+  ULONG Attributes;
+  ACCESS_MASK GrantedAccess;
+  ULONG HandleCount;
+  ULONG PointerCount;
+  ULONG PagedPoolUsage;
+  ULONG NonPagedPoolUsage;
+  ULONG Reserved[3];
+  ULONG NameInformationLength;
+  ULONG TypeInformationLength;
+  ULONG SecurityDescriptorLength;
+  LARGE_INTEGER CreateTime;
+} OBJECT_BASIC_INFORMATION, *POBJECT_BASIC_INFORMATION;
+
 typedef struct _OBJECT_NAME_INFORMATION
 {
   UNICODE_STRING Name;
@@ -776,6 +792,12 @@ typedef struct _FILE_MAILSLOT_SET_INFORMATION
 
 typedef VOID NTAPI (*PIO_APC_ROUTINE)(PVOID, PIO_STATUS_BLOCK, ULONG);
 
+typedef enum _EVENT_TYPE
+{
+  NotificationEvent = 0,
+  SynchronizationEvent
+} EVENT_TYPE, *PEVENT_TYPE;
+
 /* Function declarations for ntdll.dll.  These don't appear in any
    standard Win32 header.  */
 extern "C"
@@ -783,12 +805,18 @@ extern "C"
   NTSTATUS NTAPI NtAdjustPrivilegesToken (HANDLE, BOOLEAN, PTOKEN_PRIVILEGES,
 					  ULONG, PTOKEN_PRIVILEGES, PULONG);
   NTSTATUS NTAPI NtClose (HANDLE);
+  NTSTATUS NTAPI NtCreateDirectoryObject (PHANDLE, ACCESS_MASK,
+					  POBJECT_ATTRIBUTES);
+  NTSTATUS NTAPI NtCreateEvent (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
+  				EVENT_TYPE, BOOLEAN);
   NTSTATUS NTAPI NtCreateFile (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 			     PIO_STATUS_BLOCK, PLARGE_INTEGER, ULONG, ULONG,
 			     ULONG, ULONG, PVOID, ULONG);
   NTSTATUS NTAPI NtCreateMailslotFile(PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 				      PIO_STATUS_BLOCK, ULONG, ULONG, ULONG,
 				      PLARGE_INTEGER);
+  NTSTATUS NTAPI NtCreateMutant (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
+				 BOOLEAN);
   NTSTATUS NTAPI NtCreateSection (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 				  PLARGE_INTEGER, ULONG, ULONG, HANDLE);
   NTSTATUS NTAPI NtCreateToken (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
@@ -809,8 +837,10 @@ extern "C"
 					      ULONG, BOOLEAN);
   NTSTATUS NTAPI NtOpenDirectoryObject (PHANDLE, ACCESS_MASK,
 					POBJECT_ATTRIBUTES);
+  NTSTATUS NTAPI NtOpenEvent (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES);
   NTSTATUS NTAPI NtOpenFile (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 			     PIO_STATUS_BLOCK, ULONG, ULONG);
+  NTSTATUS NTAPI NtOpenMutant (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES);
   NTSTATUS NTAPI NtOpenSection (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES);
   /* WARNING!  Don't rely on the timestamp information returned by
      NtQueryAttributesFile.  Only the DOS file attribute info is reliable. */