Create the sys/stat.h portability header

Summary: Windows has it, but it doesn't define lstat, and a few other functions have other names.

Reviewed By: yfeldblum

Differential Revision: D3003096

fb-gh-sync-id: e7bc210390d18806c8c89cbc18711bb7a728e12f
shipit-source-id: e7bc210390d18806c8c89cbc18711bb7a728e12f

folly/Makefile.am

@@ -274,6 +274,7 @@ nobase_follyinclude_HEADERS = \
 	portability/Stdlib.h \
 	portability/Strings.h \
 	portability/Syscall.h \
+	portability/SysStat.h \
 	portability/SysTime.h \
 	portability/SysTypes.h \
 	portability/SysUio.h \
@@ -407,6 +408,7 @@ libfolly_la_SOURCES = \
 	portability/Environment.cpp \
 	portability/Stdlib.cpp \
 	portability/Strings.cpp \
+	portability/SysStat.cpp \
 	portability/SysTime.cpp \
 	portability/Time.cpp \
 	Random.cpp \

folly/portability/SysStat.cpp

+/*
+ * Copyright 2016 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <folly/portability/SysStat.h>
+
+#ifdef _WIN32
+#include <folly/portability/Windows.h>
+
+extern "C" {
+int chmod(char const* fn, int am) { return _chmod(fn, am); }
+
+// Just return the result of a normal stat for now
+int lstat(const char* path, struct stat* st) { return stat(path, st); }
+
+int mkdir(const char* fn, int mode) { return _mkdir(fn); }
+
+int umask(int md) { return _umask(md); }
+}
+#endif

folly/portability/SysStat.h

+/*
+ * Copyright 2016 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <sys/stat.h>
+
+#ifdef _WIN32
+// Windows gives weird names to these.
+#define S_IXUSR 0
+#define S_IWUSR _S_IWRITE
+#define S_IRUSR _S_IREAD
+// No group/other permissions so default to user.
+#define S_IXGRP S_IXUSR
+#define S_IWGRP S_IWUSR
+#define S_IRGRP S_IRUSR
+#define S_IXOTH S_IXUSR
+#define S_IWOTH S_IWUSR
+#define S_IROTH S_IRUSR
+#define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
+#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
+
+// This isn't defined anywhere, so give a sane value.
+#define MAXSYMLINKS 255
+
+extern "C" {
+int chmod(char const* fn, int am);
+int lstat(const char* path, struct stat* st);
+int mkdir(const char* fn, int mode);
+int umask(int md);
+}
+#endif