* Updated breakpad to latest version.

thirdparty/breakpad/common/linux/safe_readlink.cc

@@ -0,0 +1,53 @@
+// Copyright (c) 2011, 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.
+
+// safe_readlink.cc: Implement google_breakpad::SafeReadLink.
+// See safe_readlink.h for details.
+
+#include <stddef.h>
+
+#include "third_party/lss/linux_syscall_support.h"
+
+namespace google_breakpad {
+
+bool SafeReadLink(const char* path, char* buffer, size_t buffer_size) {
+  // sys_readlink() does not add a NULL byte to |buffer|. In order to return
+  // a NULL-terminated string in |buffer|, |buffer_size| should be at least
+  // one byte longer than the expected path length. Also, sys_readlink()
+  // returns the actual path length on success, which does not count the
+  // NULL byte, so |result_size| should be less than |buffer_size|.
+  ssize_t result_size = sys_readlink(path, buffer, buffer_size);
+  if (result_size >= 0 && static_cast<size_t>(result_size) < buffer_size) {
+    buffer[result_size] = '\0';
+    return true;
+  }
+  return false;
+}
+
+}  // namespace google_breakpad