tools.h

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//    MemoryAccessor - A tool for accessing /proc/PID/mem
//    Copyright (C) 2024  zloymish
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
#ifndef MEMORYACCESSOR_SRC_TOOLS_H_
#define MEMORYACCESSOR_SRC_TOOLS_H_
 
#include <sys/types.h>
 
#include <array>
#include <cstdio>
#include <memory>
#include <string>
#include <unordered_set>
 
class Tools {
public:
  void SetBufferSize(const size_t &buffer_size) { buffer_size_ = buffer_size; }
 
  int SetSigint(void (*handler)(int)) const noexcept;
 
  std::FILE *ShellCommand(const std::string &command) const noexcept;
  std::unordered_set<pid_t> GetAllPids() const noexcept;
  std::unordered_set<std::string> GetAllProcessNames() const noexcept;
  std::unordered_set<pid_t>
  FindPidsByName(const std::string &name) const noexcept;
  uint8_t PidExists(const pid_t &pid) const noexcept;
  uint8_t ProcessExists(const std::string &pname) const noexcept;
 
  uint8_t DecodePermissions(const std::string &permissions) const noexcept;
  std::string EncodePermissions(const uint8_t &mode) const noexcept;
 
  std::array<std::unique_ptr<char[]>, 2>
  FindDifferencesOfLen(const char *old_str, const char *new_str, size_t str_len,
                       size_t &done, const size_t &len) const noexcept;
 
private:
  const std::string kModes{"rwxs"}; 
  const uint8_t kModesLength{static_cast<uint8_t>(
      kModes.length())}; 
  size_t buffer_size_{
      0x1000}; 
};
 
#endif // MEMORYACCESSOR_SRC_TOOLS_H_