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std::filesy...:permissions(3)  C++ Standard Libary std::filesy...:permissions(3)

NAME
     std::filesystem::file_status::permissions	  -   std::filesystem::file_sta-
     tus::permissions

Synopsis
	std::filesystem::perms permissions()  const  noexcept;	     (1)  (since
     C++17)
	void  permissions(  std::filesystem::perms  perm  ) noexcept; (2) (since
     C++17)

	Accesses the file permissions information.

	1) Returns file permissions information.
	2) Sets file permissions to perm.

Parameters
	perm - file permissions to set to

Return value
	1) File permissions information.
	2) (none)

Example
     // Run this code

      #include <filesystem>
      #include <fstream>
      #include <iostream>

      void demo_perms(std::filesystem::perms p)
      {
	  using std::filesystem::perms;
	  auto show = [=](char op, perms perm)
	  {
	      std::cout << (perms::none == (perm & p) ? '-' : op);
	  };
	  show('r', perms::owner_read);
	  show('w', perms::owner_write);
	  show('x', perms::owner_exec);
	  show('r', perms::group_read);
	  show('w', perms::group_write);
	  show('x', perms::group_exec);
	  show('r', perms::others_read);
	  show('w', perms::others_write);
	  show('x', perms::others_exec);
	  std::cout << '\n';
      }

      int main()
      {
	  std::ofstream("test.txt"); // create file

	  std::cout << "Created file with permissions: ";
	  demo_perms(std::filesystem::status("test.txt").permissions());

	  std::filesystem::permissions(
	      "test.txt",
	      std::filesystem::perms::owner_all 	|	   std::filesys-
     tem::perms::group_all,
	      std::filesystem::perm_options::add
	  );

	  std::cout << "After adding u+rwx and g+rwx:  ";
	  demo_perms(std::filesystem::status("test.txt").permissions());

	  std::filesystem::remove("test.txt");
      }

Possible output:
      Created file with permissions: rw-r--r--
      After adding u+rwx and g+wrx:  rwxrwxr--

http://cppreference.com 	   2024.06.10	   std::filesy...:permissions(3)
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