Merge webkit.org at R49305 : Automatic merge by git.

Change-Id: I8968561bc1bfd72b8923b7118d3728579c6dbcc7

1 files changed, 190 insertions, 0 deletions

diff --git a/WebCore/platform/sql/chromium/SQLiteFileSystemChromiumPosix.cpp b/WebCore/platform/sql/chromium/SQLiteFileSystemChromiumPosix.cpp
new file mode 100644
index 0000000..2960a5f
--- /dev/null
+++ b/WebCore/platform/sql/chromium/SQLiteFileSystemChromiumPosix.cpp
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "SQLiteFileSystem.h"
+
+#include "ChromiumBridge.h"
+#include <sqlite3.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+using namespace WebCore;
+
+// Defined in Chromium's codebase in third_party/sqlite/src/os_unix.c
+extern "C" {
+void initUnixFile(sqlite3_file* file);
+int fillInUnixFile(sqlite3_vfs* vfs, int fd, int dirfd, sqlite3_file* file, const char* fileName, int noLock);
+}
+
+// Chromium's Posix implementation of SQLite VFS
+namespace {
+
+// Opens a file.
+//
+// vfs - pointer to the sqlite3_vfs object.
+// fileName - the name of the file.
+// id - the structure that will manipulate the newly opened file.
+// desiredFlags - the desired open mode flags.
+// usedFlags - the actual open mode flags that were used.
+int chromiumOpen(sqlite3_vfs* vfs, const char* fileName,
+                 sqlite3_file* id, int desiredFlags, int* usedFlags)
+{
+    initUnixFile(id);
+    int dirfd = -1;
+    int fd = ChromiumBridge::databaseOpenFile(fileName, desiredFlags, &dirfd);
+    if (fd < 0) {
+        if (desiredFlags & SQLITE_OPEN_READWRITE) {
+            int newFlags = (desiredFlags & ~(SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE)) | SQLITE_OPEN_READONLY;
+            return chromiumOpen(vfs, fileName, id, newFlags, usedFlags);
+        } else
+            return SQLITE_CANTOPEN;
+    }
+    if (usedFlags)
+        *usedFlags = desiredFlags;
+
+    fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+    if (dirfd >= 0)
+        fcntl(dirfd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+
+    // The mask 0x00007F00 gives us the 7 bits that determine the type of the file SQLite is trying to open.
+    int fileType = desiredFlags & 0x00007F00;
+    int noLock = (fileType != SQLITE_OPEN_MAIN_DB);
+    return fillInUnixFile(vfs, fd, dirfd, id, fileName, noLock);
+}
+
+// Deletes the given file.
+//
+// vfs - pointer to the sqlite3_vfs object.
+// fileName - the name of the file.
+// syncDir - determines if the directory to which this file belongs
+//           should be synched after the file is deleted.
+int chromiumDelete(sqlite3_vfs*, const char* fileName, int syncDir)
+{
+    return ChromiumBridge::databaseDeleteFile(fileName, syncDir);
+}
+
+// Check the existance and status of the given file.
+//
+// vfs - pointer to the sqlite3_vfs object.
+// fileName - the name of the file.
+// flag - the type of test to make on this file.
+// res - the result.
+int chromiumAccess(sqlite3_vfs*, const char* fileName, int flag, int* res)
+{
+    int attr = static_cast<int>(ChromiumBridge::databaseGetFileAttributes(fileName));
+    if (attr < 0) {
+        *res = 0;
+        return SQLITE_OK;
+    }
+
+    switch (flag) {
+    case SQLITE_ACCESS_EXISTS:
+        *res = 1;   // if the file doesn't exist, attr < 0
+        break;
+    case SQLITE_ACCESS_READWRITE:
+        *res = (attr & W_OK) && (attr & R_OK);
+        break;
+    case SQLITE_ACCESS_READ:
+        *res = (attr & R_OK);
+        break;
+    default:
+        return SQLITE_ERROR;
+    }
+
+    return SQLITE_OK;
+}
+
+// Turns a relative pathname into a full pathname.
+//
+// vfs - pointer to the sqlite3_vfs object.
+// relativePath - the relative path.
+// bufSize - the size of the output buffer in bytes.
+// absolutePath - the output buffer where the absolute path will be stored.
+int chromiumFullPathname(sqlite3_vfs* vfs, const char* relativePath,
+                         int, char* absolutePath)
+{
+    // The renderer process doesn't need to know the absolute path of the file
+    sqlite3_snprintf(vfs->mxPathname, absolutePath, "%s", relativePath);
+    return SQLITE_OK;
+}
+
+#ifndef SQLITE_OMIT_LOAD_EXTENSION
+// Returns NULL, thus disallowing loading libraries in the renderer process.
+//
+// vfs - pointer to the sqlite3_vfs object.
+// fileName - the name of the shared library file.
+void* chromiumDlOpen(sqlite3_vfs*, const char*)
+{
+    return 0;
+}
+#else
+#define chromiumDlOpen 0
+#endif // SQLITE_OMIT_LOAD_EXTENSION
+
+} // namespace
+
+namespace WebCore {
+
+void SQLiteFileSystem::registerSQLiteVFS()
+{
+    // FIXME: Make sure there aren't any unintended consequences when VFS code is called in the browser process.
+    if (!ChromiumBridge::sandboxEnabled()) {
+        ASSERT_NOT_REACHED();
+        return;
+    }
+
+    sqlite3_vfs* unix_vfs = sqlite3_vfs_find("unix");
+    static sqlite3_vfs chromium_vfs = {
+        1,
+        unix_vfs->szOsFile,
+        unix_vfs->mxPathname,
+        0,
+        "chromium_vfs",
+        unix_vfs->pAppData,
+        chromiumOpen,
+        chromiumDelete,
+        chromiumAccess,
+        chromiumFullPathname,
+        chromiumDlOpen,
+        unix_vfs->xDlError,
+        unix_vfs->xDlSym,
+        unix_vfs->xDlClose,
+        unix_vfs->xRandomness,
+        unix_vfs->xSleep,
+        unix_vfs->xCurrentTime,
+        unix_vfs->xGetLastError
+    };
+    sqlite3_vfs_register(&chromium_vfs, 1);
+}
+
+} // namespace WebCore