Split filename-based syscall implementations into a separate file

src/trusted/service_runtime/sys_filename.h

Index: src/trusted/service_runtime/sys_filename.h
diff --git a/src/trusted/service_runtime/sys_filename.h b/src/trusted/service_runtime/sys_filename.h
new file mode 100644
index 0000000000000000000000000000000000000000..0d9721badaabbdccb5c41d96c458fe795b3f741f
--- /dev/null
+++ b/src/trusted/service_runtime/sys_filename.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2013 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef NATIVE_CLIENT_SERVICE_RUNTIME_NACL_SYS_FILENAME_H_
+#define NATIVE_CLIENT_SERVICE_RUNTIME_NACL_SYS_FILENAME_H_ 1
+
+#include "native_client/src/include/nacl_base.h"
+#include "native_client/src/include/portability.h"
+
+EXTERN_C_BEGIN
+
+struct NaClApp;
+struct NaClAppThread;
+struct nacl_abi_stat;
+
+int32_t NaClOpenAclCheck(struct NaClApp *nap,
+                         char const     *path,
+                         int            flags,
+                         int            mode);
+
+int32_t NaClStatAclCheck(struct NaClApp *nap,
+                         char const     *path);
+
+int32_t NaClSysOpen(struct NaClAppThread  *natp,
+                    char                  *pathname,
+                    int                   flags,
+                    int                   mode);
+
+int32_t NaClSysStat(struct NaClAppThread *natp,
+                    const char           *path,
+                    struct nacl_abi_stat *nasp);
+
+int32_t NaClSysMkdir(struct NaClAppThread *natp,
+                     uint32_t             path,
+                     int                  mode);
+
+int32_t NaClSysRmdir(struct NaClAppThread *natp,
+                     uint32_t             path);
+
+int32_t NaClSysChdir(struct NaClAppThread *natp,
+                     uint32_t             path);
+
+int32_t NaClSysGetcwd(struct NaClAppThread *natp,
+                      uint32_t             buffer,
+                      int                  len);
+
+int32_t NaClSysUnlink(struct NaClAppThread *natp,
+                      uint32_t             path);
+
+EXTERN_C_END
+
+#endif