Kernel/LibC: Add SYS_TRUNCATE

libc/include/sys/syscall.h

@@ -73,6 +73,7 @@ __BEGIN_DECLS
 	O(SYS_CONNECT,			connect)		\
 	O(SYS_LISTEN,			listen)			\
 	O(SYS_PSELECT,			pselect)		\
+	O(SYS_TRUNCATE,			truncate)		\
 
 enum Syscall
 {

libc/unistd.cpp

@@ -99,6 +99,11 @@ off_t lseek(int fildes, off_t offset, int whence)
 	return syscall(SYS_SEEK, fildes, offset, whence);
 }
 
+int ftruncate(int fildes, off_t length)
+{
+	return syscall(SYS_TRUNCATE, fildes, length);
+}
+
 int dup(int fildes)
 {
 	return syscall(SYS_DUP, fildes);