Snippets for shadow 4.20.2 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/7m1bfzrvjhj5fvz5zq5yjs7ivkpqvy76-shadow-4.20.2.drv.

• sulogin.c:92:17: warning: ignoring return value of 'dup' declared with attribute 'warn_unused_result' [-Wunused-result]
     92 |                 dup(0);
        |                 ^~~~~~
  

• sulogin.c:93:17: warning: ignoring return value of 'dup' declared with attribute 'warn_unused_result' [-Wunused-result]
     93 |                 dup(0);
        |                 ^~~~~~
  

• gpasswd.c:168:24: warning: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Wunused-result]
    168 |                 (void) write (STDOUT_FILENO, "\n", 1);
        |                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• useradd.c:2271:16: warning: ignoring return value of 'chown' declared with attribute 'warn_unused_result' [-Wunused-result]
   2271 |         (void) chown(prefix_user_home, user_id, user_gid);
        |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• vipw.c:442:9: warning: ignoring return value of 'link' declared with attribute 'warn_unused_result' [-Wunused-result]
    442 |         link (file, filebackup);
        |         ^~~~~~~~~~~~~~~~~~~~~~~
  

• ../../lib/alloc/malloc.h:39:16: warning: argument 2 value '18446744073709551615' exceeds maximum object size 9223372036854775807 [-Walloc-size-larger-than=]
     39 |         return reallocarray(NULL, nmemb, size);
        |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~