text: /*
   * Copyright (c) 2020, the SerenityOS developers.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. 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.
   *
   * 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 HOLDER 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.
   */
  
  #include <AK/ByteBuffer.h>
  #include <AK/JsonObject.h>
  #include <AK/QuickSort.h>
  #include <AK/String.h>
  #include <LibCore/ArgsParser.h>
  #include <LibCore/File.h>
  #include <stdio.h>
  
  int main(int argc, char** argv)
  {
      if (pledge("stdio rpath", nullptr) < 0) {
          perror("pledge");
          return 1;
      }
  
      if (unveil("/proc", "r") < 0) {
          perror("unveil");
          return 1;
      }
  
      unveil(nullptr, nullptr);
  
      const char* pid;
      static bool extended = false;
  
      Core::ArgsParser args_parser;
      args_parser.add_option(extended, "Extended output", nullptr, 'x');
      args_parser.add_positional_argument(pid, "PID", "PID", Core::ArgsParser::Required::Yes);
      args_parser.parse(argc, argv);
  
      auto file = Core::File::construct(String::formatted("/proc/{}/vm", pid));
      if (!file->open(Core::IODevice::ReadOnly)) {
          fprintf(stderr, "Error: %s\n", file->error_string());
          return 1;
      }
  
      printf("%s:\n", pid);
  
      if (extended) {
          printf("Address   Size       Resident   Dirty      Access  VMObject Type          Purgeable  CoW Pages    Name\n");
      } else {
          printf("Address   Size       Access  Name\n");
      }
  
      auto file_contents = file->read_all();
      auto json = JsonValue::from_string(file_contents);
      ASSERT(json.has_value());
  
      Vector<JsonValue> sorted_regions = json.value().as_array().values();
      quick_sort(sorted_regions, [](auto& a, auto& b) {
          return a.as_object().get("address").to_u32() < b.as_object().get("address").to_u32();
      });
  
      for (auto& value : sorted_regions) {
          auto map = value.as_object();
          auto address = map.get("address").to_int();
          auto size = map.get("size").to_string();
  
          auto readable = map.get("readable").to_bool();
          auto writable = map.get("writable").to_bool();
          auto executable = map.get("executable").to_bool();
          auto access = String::format("%s%s%s", (readable ? "r" : "-"), (writable ? "w" : "-"), (executable ? "x" : "-"));
  
          printf("%08x  ", address);
          printf("%-10s ", size.characters());
          if (extended) {
              auto resident = map.get("amount_resident").to_string();
              auto dirty = map.get("amount_dirty").to_string();
              auto vmobject = map.get("vmobject").to_string();
              auto purgeable = map.get("purgeable").to_string();
              auto cow_pages = map.get("cow_pages").to_string();
              printf("%-10s ", resident.characters());
              printf("%-10s ", dirty.characters());
              printf("%-6s  ", access.characters());
              printf("%-22s ", vmobject.characters());
              printf("%-10s ", purgeable.characters());
              printf("%-12s ", cow_pages.characters());
          } else {
              printf("%-6s  ", access.characters());
          }
          auto name = map.get("name").to_string();
          printf("%-20s ", name.characters());
          printf("\n");
      }
  
      return 0;
  }
  