Add linux-specific core.sys.linux.sys.file module

This adds core.sys.linux.file module which contains
flock function definition and values of the parameters
to pass.

mak/COPY

@@ -93,6 +93,7 @@ COPY=\
 	$(IMPDIR)\core\sys\linux\unistd.d \
 	\
 	$(IMPDIR)\core\sys\linux\sys\auxv.d \
+	$(IMPDIR)\core\sys\linux\sys\file.d \
 	$(IMPDIR)\core\sys\linux\sys\inotify.d \
 	$(IMPDIR)\core\sys\linux\sys\mman.d \
 	$(IMPDIR)\core\sys\linux\sys\signalfd.d \

src/core/sys/linux/sys/file.d

@@ -0,0 +1,34 @@
+/**
+ * D header file for Linux file ops.
+ *
+ * Copyright: Copyright Nemanja Boric 2016.
+ * License:   $(WEB www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * Authors:   Nemanja Boric
+ */
+module core.sys.linux.sys.file;
+
+version (linux):
+extern (C):
+nothrow:
+@nogc:
+
+/* Operations for the `flock' call. */
+/// Shared lock
+enum LOCK_SH              = 0x01;
+/// Exclusive lock
+enum LOCK_EX              = 0x02;
+/// Unlock
+enum LOCK_UN              = 0x08;
+
+/// Don't block when locking.
+/// Can be OR'd into one of the above.
+enum LOCK_NB              = 0x04;
+
+/// Apply or remove an advisory lock on an open file
+/// Params:
+///     fd = file to apply or remove lock from
+///     operation = lock operation to perform
+/// Returns:
+///     0 on success, -1 on failure, with .errno
+///     set appropriately.
+int     flock(int fd, int operation) @trusted;

win32.mak

@@ -467,6 +467,9 @@ $(IMPDIR)\core\sys\linux\unistd.d : src\core\sys\linux\unistd.d
 $(IMPDIR)\core\sys\linux\sys\auxv.d : src\core\sys\linux\sys\auxv.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\linux\sys\file.d : src\core\sys\linux\sys\file.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\linux\sys\inotify.d : src\core\sys\linux\sys\inotify.d
 	copy $** $@
 

win64.mak

@@ -475,6 +475,9 @@ $(IMPDIR)\core\sys\linux\unistd.d : src\core\sys\linux\unistd.d
 $(IMPDIR)\core\sys\linux\sys\auxv.d : src\core\sys\linux\sys\auxv.d
 	copy $** $@
 
+$(IMPDIR)\core\sys\linux\sys\file.d : src\core\sys\linux\sys\file.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\linux\sys\inotify.d : src\core\sys\linux\sys\inotify.d
 	copy $** $@