[Midnightbsd-cvs] [MidnightBSD/src] fb1907: id: harden group list handling

[Lucas Holt]

  Branch: refs/heads/master
  Home:   https://github.com/MidnightBSD/src
  Commit: fb1907ba1204badbce464f160859a09bb49c8997
      https://github.com/MidnightBSD/src/commit/fb1907ba1204badbce464f160859a09bb49c8997
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2026-05-01 (Fri, 01 May 2026)

  Changed paths:
    M usr.bin/id/Makefile
    M usr.bin/id/id.c
    A usr.bin/id/tests/Makefile
    A usr.bin/id/tests/id_test.sh

  Log Message:
  -----------
  id: harden group list handling

Avoid relying on _SC_NGROUPS_MAX for allocations; size group lists dynamically and use gid_t throughout to prevent truncation.

Add basic ATF tests for id/groups/whoami.

AI-Assisted-by: GPT-5.2 (Codex CLI)
Signed-off-by: Lucas Holt <luke at foolishgames.com>



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