Load additional NSS library files in zygote main if remoting is enabled

base/nss_util.cc

Index: base/nss_util.cc
diff --git a/base/nss_util.cc b/base/nss_util.cc
index e4d1762baa75c572b07458bb43f3eed465edc922..3229149601abb9a42caafb06371fb455ea6c0e21 100644
--- a/base/nss_util.cc
+++ b/base/nss_util.cc
@@ -18,10 +18,14 @@
 #include <sys/vfs.h>
 #endif
 
+#include <vector>
+
 #include "base/environment.h"
+#include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
+#include "base/native_library.h"
 #include "base/scoped_ptr.h"
 #include "base/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
@@ -402,6 +406,47 @@ void DisableNSSForkCheck() {
   env->SetVar("NSS_STRICT_NOFORK", "DISABLED");
 }
 
+void LoadNSSLibraries() {
+  // Some NSS libraries are linked dynamically so load them here.
+#if defined(USE_NSS)
+  // Try to search for multiple directories to load the libraries.
+  std::vector<FilePath> paths;
+
+  // Use relative path to Search PATH for the library files.

[wtc, 2011/03/18 18:46:31]

Nit: the PATH environment variable is only used for seaching
executable programs.  You should be vague here and just say
"Use relative path name to rely on the default search path
for shared libraries."

+  paths.push_back(FilePath());
+
+  // For Debian derivaties NSS libraries are located here.

[wtc, 2011/03/18 18:46:31]

Nit: NSS libraries => dynamically loaded NSS libraries

Other NSS libraries, such as libnss3.so and libssl3.so,
are in the standard library search path.

+  paths.push_back(FilePath("/usr/lib/nss"));
+
+  // A list of library files to load.
+  std::vector<std::string> libs;
+  libs.push_back("libsoftokn3.so");
+  libs.push_back("libfreebl3.so");
+
+  // For each combination of library file and path, check for existence and
+  // then load.
+  size_t loaded = 0;
+  for (size_t i = 0; i < libs.size(); ++i) {
+    for (size_t j = 0; j < paths.size(); ++j) {
+      FilePath path = paths[j].Append(libs[i]);
+      if (file_util::PathExists(path)) {
+        NativeLibrary lib = base::LoadNativeLibrary(path);
+        if (lib) {
+          ++loaded;
+          break;
+        }
+      }
+    }
+  }
+
+  if (loaded == libs.size()) {
+    VLOG(3) << "NSS libraries loaded.";
+  } else {
+    LOG(WARNING) << "Failed to load NSS libraries.";
+  }
+#endif
+}
+
 bool CheckNSSVersion(const char* version) {
   return !!NSS_VersionCheck(version);
 }