initial check-in, version 0.5.0

src/linux/sendfile.c

@@ -0,0 +1,10 @@
+#include <unistd.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t sendfile(int out_fd, int in_fd, off_t *ofs, size_t count)
+{
+	return syscall4(__NR_sendfile, out_fd, in_fd, (long)ofs, count);
+}
+
+LFS64(sendfile);