Kernel/LibC: Implement flock

userspace/libraries/LibC/CMakeLists.txt

@@ -33,6 +33,7 @@ set(LIBC_SOURCES
 	strings.cpp
 	sys/banan-os.cpp
 	sys/epoll.cpp
+	sys/file.cpp
 	sys/ioctl.cpp
 	sys/mman.cpp
 	sys/resource.cpp

userspace/libraries/LibC/include/sys/file.h

@@ -0,0 +1,17 @@
+#ifndef _SYS_FILE_H
+#define _SYS_FILE_H 1
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define LOCK_UN 0
+#define LOCK_EX 1
+#define LOCK_SH 2
+#define LOCK_NB 4
+
+int flock(int fd, int op);
+
+__END_DECLS
+
+#endif

userspace/libraries/LibC/include/sys/syscall.h

@@ -107,6 +107,7 @@ __BEGIN_DECLS
 	O(SYS_EPOLL_CREATE1,	epoll_create1)	\
 	O(SYS_EPOLL_CTL,		epoll_ctl)		\
 	O(SYS_EPOLL_PWAIT2,		epoll_pwait2)	\
+	O(SYS_FLOCK,			flock)			\
 
 enum Syscall
 {

userspace/libraries/LibC/sys/file.cpp

@@ -0,0 +1,8 @@
+#include <sys/file.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int flock(int fd, int op)
+{
+	return syscall(SYS_FLOCK, fd, op);
+}