systemd: re-introduce hostnamed-localed-timedated-disable-methods-that-cha.patch

In NixOS, /etc is NOT read-only, and most things in /etc are symlinks
to /etc/static, which is a symlink into the nix store - so the upstream
systemd "/etc is read-only" detection doesn't work.

Fixes #224080.

pkgs/os-specific/linux/systemd/0007-hostnamed-localed-timedated-disable-methods-that-cha.patch

@@ -0,0 +1,105 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Gabriel Ebner <gebner@gebner.org>
+Date: Sun, 6 Dec 2015 14:26:36 +0100
+Subject: [PATCH] hostnamed, localed, timedated: disable methods that change
+ system settings.
+
+---
+ src/hostname/hostnamed.c |  6 ++++++
+ src/locale/localed.c     |  9 +++++++++
+ src/timedate/timedated.c | 10 ++++++++++
+ 3 files changed, 25 insertions(+)
+
+diff --git a/src/hostname/hostnamed.c b/src/hostname/hostnamed.c
+index 36ab0148b9..7d458d196d 100644
+--- a/src/hostname/hostnamed.c
++++ b/src/hostname/hostnamed.c
+@@ -1028,6 +1028,9 @@ static int method_set_static_hostname(sd_bus_message *m, void *userdata, sd_bus_
+         if (r < 0)
+                 return r;
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         name = empty_to_null(name);
+ 
+         context_read_etc_hostname(c);
+@@ -1091,6 +1094,9 @@ static int set_machine_info(Context *c, sd_bus_message *m, int prop, sd_bus_mess
+         if (r < 0)
+                 return r;
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         name = empty_to_null(name);
+ 
+         context_read_machine_info(c);
+diff --git a/src/locale/localed.c b/src/locale/localed.c
+index 841e5e3e91..a21e34430b 100644
+--- a/src/locale/localed.c
++++ b/src/locale/localed.c
+@@ -264,6 +264,9 @@ static int method_set_locale(sd_bus_message *m, void *userdata, sd_bus_error *er
+ 
+         use_localegen = locale_gen_check_available();
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         /* If single locale without variable name is provided, then we assume it is LANG=. */
+         if (strv_length(l) == 1 && !strchr(l[0], '=')) {
+                 if (!locale_is_valid(l[0]))
+@@ -382,6 +385,9 @@ static int method_set_vc_keyboard(sd_bus_message *m, void *userdata, sd_bus_erro
+         if (r < 0)
+                 return bus_log_parse_error(r);
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         vc_context_empty_to_null(&in);
+ 
+         FOREACH_STRING(name, in.keymap ?: in.toggle, in.keymap ? in.toggle : NULL) {
+@@ -607,6 +613,9 @@ static int method_set_x11_keyboard(sd_bus_message *m, void *userdata, sd_bus_err
+         if (r < 0)
+                 return bus_log_parse_error(r);
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         x11_context_empty_to_null(&in);
+ 
+         if (!x11_context_is_safe(&in))
+diff --git a/src/timedate/timedated.c b/src/timedate/timedated.c
+index ad483301ef..31ed86955b 100644
+--- a/src/timedate/timedated.c
++++ b/src/timedate/timedated.c
+@@ -665,6 +665,10 @@ static int method_set_timezone(sd_bus_message *m, void *userdata, sd_bus_error *
+         if (r < 0)
+                 return r;
+ 
++        if (getenv("NIXOS_STATIC_TIMEZONE"))
++                return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++                    "Changing timezone via systemd is not supported when it is set in NixOS configuration.");
++
+         if (!timezone_is_valid(z, LOG_DEBUG))
+                 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid or not installed time zone '%s'", z);
+ 
+@@ -743,6 +747,9 @@ static int method_set_local_rtc(sd_bus_message *m, void *userdata, sd_bus_error
+         if (r < 0)
+                 return r;
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         if (lrtc == c->local_rtc && !fix_system)
+                 return sd_bus_reply_method_return(m, NULL);
+ 
+@@ -923,6 +930,9 @@ static int method_set_ntp(sd_bus_message *m, void *userdata, sd_bus_error *error
+         if (r < 0)
+                 return r;
+ 
++        return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED,
++            "Changing system settings via systemd is not supported on NixOS.");
++
+         r = context_update_ntp_status(c, bus, m);
+         if (r < 0)
+                 return r;

pkgs/os-specific/linux/systemd/0009-Change-usr-share-zoneinfo-to-etc-zoneinfo.patch

@@ -103,7 +103,7 @@ index 65d9e7e398..dd44d529ca 100644
  
  static bool etc_writable(void) {
 diff --git a/src/timedate/timedated.c b/src/timedate/timedated.c
-index ad483301ef..a7f22b1c86 100644
+index 31ed86955b..8db8d8c288 100644
 --- a/src/timedate/timedated.c
 +++ b/src/timedate/timedated.c
 @@ -282,7 +282,7 @@ static int context_read_data(Context *c) {

pkgs/os-specific/linux/systemd/default.nix

@@ -172,18 +172,19 @@ stdenv.mkDerivation (finalAttrs: {
     ./0004-fsck-look-for-fsck-binary-not-just-in-sbin.patch
     ./0005-Add-some-NixOS-specific-unit-directories.patch
     ./0006-Get-rid-of-a-useless-message-in-user-sessions.patch
-    ./0007-Fix-hwdb-paths.patch
-    ./0008-Change-usr-share-zoneinfo-to-etc-zoneinfo.patch
-    ./0009-localectl-use-etc-X11-xkb-for-list-x11.patch
-    ./0010-build-don-t-create-statedir-and-don-t-touch-prefixdi.patch
-    ./0011-add-rootprefix-to-lookup-dir-paths.patch
-    ./0012-systemd-shutdown-execute-scripts-in-etc-systemd-syst.patch
-    ./0013-systemd-sleep-execute-scripts-in-etc-systemd-system-.patch
-    ./0014-path-util.h-add-placeholder-for-DEFAULT_PATH_NORMAL.patch
-    ./0015-pkg-config-derive-prefix-from-prefix.patch
-    ./0016-inherit-systemd-environment-when-calling-generators.patch
-    ./0017-core-don-t-taint-on-unmerged-usr.patch
-    ./0018-tpm2_context_init-fix-driver-name-checking.patch
+    ./0007-hostnamed-localed-timedated-disable-methods-that-cha.patch
+    ./0008-Fix-hwdb-paths.patch
+    ./0009-Change-usr-share-zoneinfo-to-etc-zoneinfo.patch
+    ./0010-localectl-use-etc-X11-xkb-for-list-x11.patch
+    ./0011-build-don-t-create-statedir-and-don-t-touch-prefixdi.patch
+    ./0012-add-rootprefix-to-lookup-dir-paths.patch
+    ./0013-systemd-shutdown-execute-scripts-in-etc-systemd-syst.patch
+    ./0014-systemd-sleep-execute-scripts-in-etc-systemd-system-.patch
+    ./0015-path-util.h-add-placeholder-for-DEFAULT_PATH_NORMAL.patch
+    ./0016-pkg-config-derive-prefix-from-prefix.patch
+    ./0017-inherit-systemd-environment-when-calling-generators.patch
+    ./0018-core-don-t-taint-on-unmerged-usr.patch
+    ./0019-tpm2_context_init-fix-driver-name-checking.patch
   ] ++ lib.optional stdenv.hostPlatform.isMusl (
     let
       oe-core = fetchzip {