[Midnightbsd-cvs] [MidnightBSD/src] ac7629: prowld: support read-only media and early/PID-1 op...

[Lucas Holt]

  Branch: refs/heads/feature/prowl
  Home:   https://github.com/MidnightBSD/src
  Commit: ac7629f360ffa148bdbd7d3ae48d3070c95a783f
      https://github.com/MidnightBSD/src/commit/ac7629f360ffa148bdbd7d3ae48d3070c95a783f
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2026-04-18 (Sat, 18 Apr 2026)

  Changed paths:
    M sbin/prowld/ipc.c
    M sbin/prowld/job.c
    M sbin/prowld/prowld.c
    M sbin/prowld/prowld.h
    M sbin/prowld/supervisor.c

  Log Message:
  -----------
  prowld: support read-only media and early/PID-1 operation

Three practical fixes for operation on CD-ROM, read-only USB, or any
environment where /var is not yet writable at startup:

1. Runtime path globals (g_run_dir, g_notify_dir, g_sock_path, …)
   Replace all compile-time PROWLD_* macro references in prowld.c,
   ipc.c, supervisor.c and job.c with mutable globals defaulting to
   the same paths.  setup_runtime_paths(base) rebuilds all nine paths
   from a single base directory.

2. Read-only fallback in ensure_dirs()
   If the primary run directory (/var/run/prowld) cannot be created
   (EROFS, EACCES, missing parent), prowld automatically falls back to
   /tmp/prowld and rebuilds all runtime paths under that tmpfs tree.
   The -s <dir> flag allows an explicit override at startup.
   Non-critical directory failures (db, log) are logged as warnings
   rather than aborting.

3. PID 1 / init support
   If getpid() == 1 (kernel exec'd prowld as init), daemon() is skipped
   to avoid orphaning the child and panicking the kernel.  Debug/console
   output is forced on.  After orderly shutdown, reboot(RB_HALT) is
   called instead of exit(0) since PID 1 must never return.

4. IPC non-fatal
   ipc_init() failure is downgraded from fatal to a warning.  prowld
   continues managing services; prowlctl commands are unavailable until
   the socket directory becomes writable (e.g. after varmfs mounts).

5. Generated unit dir
   startup_load() and reload_config() now also scan g_generated_dir so
   dynamically generated units are loaded regardless of where the
   runtime tree lives.

AI-Assisted-by: Claude Sonnet 4.6
Signed-off-by: Lucas Holt <luke at foolishgames.com>



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