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Fix plugin detection #57

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Merged
TheAssassin merged 3 commits into from
Nov 19, 2018
Merged

Fix plugin detection #57

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c425875
Make sure directories aren't falsely recognized as plugins
TheAssassin Nov 19, 2018
6f7a2fd
Reduce verbosity of debug logging related to plugin detection
TheAssassin Nov 19, 2018
1329317
Fix directory check
TheAssassin Nov 19, 2018
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59 changes: 39 additions & 20 deletions src/plugin/plugin.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -64,30 +64,49 @@ namespace linuxdeploy {

ldLog() << LD_DEBUG << "Searching for plugins in directory" << dir << std::endl;

bool extendedDebugLoggingEnabled = (getenv("DEBUG_PLUGIN_DETECTION") != nullptr);

for (bf::directory_iterator i(dir); i != bf::directory_iterator(); ++i) {
// must be a file, and not a directory
if (bf::is_directory(bf::absolute(*i))) {
if (extendedDebugLoggingEnabled)
ldLog() << LD_DEBUG << "Entry is a directory, skipping:" << i->path() << std::endl;

continue;
}

// file must be executable...
if (bf::status(*i).permissions() & (bf::owner_exe | bf::group_exe | bf::others_exe)) {
// ... and filename must match regular expression
boost::cmatch res;
if (boost::regex_match(i->path().filename().string().c_str(), res, PLUGIN_EXPR)) {
try {
auto name = res[1].str();
auto* plugin = createPluginInstance(*i);
if (plugin == nullptr) {
ldLog() << LD_DEBUG << "Failed to create instance for plugin" << i->path();
} else {
ldLog() << LD_DEBUG << "Found plugin '" << LD_NO_SPACE << name << LD_NO_SPACE << "':" << plugin->path() << std::endl;

if (foundPlugins.find(name) != foundPlugins.end()) {
ldLog() << LD_DEBUG << "Already found" << name << "plugin in" << foundPlugins[name]->path() << std::endl;
} else {
foundPlugins[name] = plugin;
}
}
} catch (const PluginError& e) {
ldLog() << LD_WARNING << "Could not load plugin" << i->path() << LD_NO_SPACE << ": " << e.what();
if (!(bf::status(*i).permissions() & (bf::owner_exe | bf::group_exe | bf::others_exe))) {
if (extendedDebugLoggingEnabled)
ldLog() << LD_DEBUG << "File/symlink is not executable, skipping:" << i->path() << std::endl;

continue;
}

// entry name must match regular expression
boost::cmatch res;

if (!boost::regex_match(i->path().filename().string().c_str(), res, PLUGIN_EXPR)) {
ldLog() << LD_DEBUG << "Doesn't match plugin regex, skipping:" << i->path() << std::endl;
continue;
}

try {
auto name = res[1].str();
auto* plugin = createPluginInstance(*i);
if (plugin == nullptr) {
ldLog() << LD_DEBUG << "Failed to create instance for plugin" << i->path() << std::endl;;
} else {
ldLog() << LD_DEBUG << "Found plugin '" << LD_NO_SPACE << name << LD_NO_SPACE << "':" << plugin->path() << std::endl;

if (foundPlugins.find(name) != foundPlugins.end()) {
ldLog() << LD_DEBUG << "Already found" << name << "plugin in" << foundPlugins[name]->path() << std::endl;
} else {
foundPlugins[name] = plugin;
}
}
} catch (const PluginError& e) {
ldLog() << LD_WARNING << "Could not load plugin" << i->path() << LD_NO_SPACE << ": " << e.what();
}
}
}
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