void check_file_sanity()

in xar/XarExecFuse.cpp [82:107]

• 23 lines of code
• 9 McCabe index (conditional complexity)

void check_file_sanity(
    const std::string& path,
    enum Expectation expected,
    mode_t perms) {
  struct stat st;
  XAR_PCHECK_SIMPLE(stat(path.c_str(), &st) == 0);
  if (st.st_uid != geteuid()) {
    XAR_FATAL << "Invalid owner of " << path;
  }

  // Verify the directory is owned by one of the groups the user is in.
  if (st.st_gid != getegid() && !tools::xar::is_user_in_group(st.st_gid)) {
    XAR_FATAL << "Invalid group of " << path;
  }

  if (expected == Expectation::Directory && !S_ISDIR(st.st_mode)) {
    XAR_FATAL << "Should be a directory: " << path;
  }
  if (expected == Expectation::File && !S_ISREG(st.st_mode)) {
    XAR_FATAL << "Should be a normal file: " << path;
  }
  if ((st.st_mode & 07777) != perms) {
    XAR_FATAL << "Invalid permissions on " << path << ", expected " << std::oct
              << perms << ", got " << (st.st_mode & 07777);
  }
}