Create ScopedTempDir, implement it on POSIX, and use it where appropriate.

util/test/scoped_temp_dir_posix.cc

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// 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 "util/test/scoped_temp_dir.h"
+
+#include <dirent.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "base/logging.h"
+#include "gtest/gtest.h"
+#include "util/test/errors.h"
+
+namespace crashpad {
+namespace test {
+
+// static
+base::FilePath ScopedTempDir::CreateTemporaryDirectory() {
+  char dir_tempalate[] = "/tmp/com.googlecode.crashpad.test.XXXXXX";
+  PCHECK(mkdtemp(dir_tempalate)) << "mkdtemp " << dir_tempalate;
+  return base::FilePath(dir_tempalate);
+}
+
+// static
+void ScopedTempDir::RecursivelyDeleteTemporaryDirectory(
+    const base::FilePath& path) {
+  DIR* dir = opendir(path.value().c_str());
+  ASSERT_TRUE(dir) << ErrnoMessage("opendir") << " " << path.value();
+
+  dirent* entry;
+  while ((entry = readdir(dir))) {
+    if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
+      continue;
+    }
+
+    base::FilePath entry_path = path.Append(entry->d_name);
+    if (entry->d_type == DT_DIR) {
+      RecursivelyDeleteTemporaryDirectory(entry_path);
+    } else {
+      EXPECT_EQ(0, unlink(entry_path.value().c_str()))
+          << ErrnoMessage("unlink") << " " << entry_path.value();
+    }
+  }
+
+  EXPECT_EQ(0, closedir(dir))
+      << ErrnoMessage("closedir") << " " << path.value();
+  EXPECT_EQ(0, rmdir(path.value().c_str()))
+      << ErrnoMessage("rmdir") << " " << path.value();
+}
+
+}  // namespace test
+}  // namespace crashpad