Files: Add basic implementation of Directory and some basic tests.

services/files/shared_impl.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "services/files/shared_impl.h"
+
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "services/files/futimens.h"
+#include "services/files/util.h"
+
+namespace mojo {
+namespace files {
+
+void StatFD(int fd, const Callback<void(Error, FileInformationPtr)>& callback) {
+  DCHECK_NE(fd, -1);
+
+  struct stat buf;
+  if (fstat(fd, &buf) != 0) {
+    callback.Run(ErrnoToError(errno), nullptr);
+    return;
+  }
+
+  FileInformationPtr file_info(FileInformation::New());
+  // Only fill in |size| for files.
+  if (S_ISREG(buf.st_mode)) {
+    file_info->size = static_cast<int64_t>(buf.st_size);
+  } else {
+    LOG_IF(WARNING, !S_ISDIR(buf.st_mode))
+        << "Unexpected fstat() of special file";
+    file_info->size = 0;
+  }
+  file_info->atime = Timespec::New();
+  file_info->mtime = Timespec::New();
+#if defined(OS_ANDROID)
+  file_info->atime->seconds = static_cast<int64_t>(buf.st_atime);
+  file_info->atime->nanoseconds = static_cast<int32_t>(buf.st_atime_nsec);
+  file_info->mtime->seconds = static_cast<int64_t>(buf.st_mtime);
+  file_info->mtime->nanoseconds = static_cast<int32_t>(buf.st_mtime_nsec);
+#else
+  file_info->atime->seconds = static_cast<int64_t>(buf.st_atim.tv_sec);
+  file_info->atime->nanoseconds = static_cast<int32_t>(buf.st_atim.tv_nsec);
+  file_info->mtime->seconds = static_cast<int64_t>(buf.st_mtim.tv_sec);
+  file_info->mtime->nanoseconds = static_cast<int32_t>(buf.st_mtim.tv_nsec);
+#endif
+
+  callback.Run(ERROR_OK, file_info.Pass());
+}
+
+void TouchFD(int fd,
+             TimespecOrNowPtr atime,
+             TimespecOrNowPtr mtime,
+             const Callback<void(Error)>& callback) {
+  DCHECK_NE(fd, -1);
+
+  struct timespec times[2];
+  if (Error error = TimespecOrNowToStandardTimespec(atime.get(), &times[0])) {
+    callback.Run(error);
+    return;
+  }
+  if (Error error = TimespecOrNowToStandardTimespec(mtime.get(), &times[1])) {
+    callback.Run(error);
+    return;
+  }
+
+  if (futimens(fd, times) != 0) {
+    callback.Run(ErrnoToError(errno));
+    return;
+  }
+
+  callback.Run(ERROR_OK);
+}
+
+}  // namespace files
+}  // namespace mojo