osquery-1/osquery/tables/system/linux/kernel_modules.cpp

// Copyright 2004-present Facebook. All Rights Reserved.

#include <fstream>

#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <boost/lexical_cast.hpp>

#include <glog/logging.h>

#include "osquery/core.h"
#include "osquery/database.h"
#include "osquery/filesystem.h"

namespace osquery {
namespace tables {

const std::string kKernelModulePath = "/proc/modules";

QueryData genKernelModules() {
  QueryData results;

  if (!pathExists(kKernelModulePath).ok()) {
    LOG(ERROR) << "Cannot find kernel modules proc file: " << kKernelModulePath;
    return results;
  }

  // Cannot seek to the end of procfs.
  std::ifstream fd(kKernelModulePath, std::ios::in);
  if (!fd) {
    LOG(ERROR) << "Cannot read kernel modules from: " << kKernelModulePath;
    return results;
  }

  auto module_info = std::string(std::istreambuf_iterator<char>(fd),
                                 std::istreambuf_iterator<char>());

  for (const auto& module : split(module_info, "\n")) {
    Row r;
    auto module_info = split(module, " ");

    if (module_info.size() < 6) {
      // Interesting error case, this module line is not well formed.
      continue;
    }

    for (auto& detail : module_info) {
      // Clean up the delimiters
      boost::trim(detail);
      if (detail.back() == ',') {
        detail.pop_back();
      }
    }

    r["name"] = module_info[0];
    r["size"] = module_info[1];
    r["used_by"] = module_info[3];
    r["status"] = module_info[4];
    r["address"] = module_info[5];
    results.push_back(r);
  }

  return results;
}
}
}