vconsole: allow setting default keymap through build option

Allow defining the default keymap to be used by
vconsole-setup through a build option. A template
vconsole.conf also gets populated by tmpfiles if
it doesn't exist.

factory/templates/meson.build

@@ -9,3 +9,11 @@ custom_target(
         command : [jinja2_cmdline, '@INPUT@', '@OUTPUT@'],
         install : true,
         install_dir : factory_etc_dir)
+
+custom_target(
+        'vconsole.conf',
+        input : 'vconsole.conf.in',
+        output : 'vconsole.conf',
+        command : [jinja2_cmdline, '@INPUT@', '@OUTPUT@'],
+        install : true,
+        install_dir : factory_etc_dir)

factory/templates/vconsole.conf.in

@@ -0,0 +1,3 @@
+# This is the fallback vconsole configuration provided by systemd.
+
+#KEYMAP={{ SYSTEMD_DEFAULT_KEYMAP }}

meson.build

@@ -985,6 +985,9 @@ conf.set_quoted('SYSTEMD_DEFAULT_LOCALE', default_locale)
 nspawn_locale = get_option('nspawn-locale')
 conf.set_quoted('SYSTEMD_NSPAWN_LOCALE', nspawn_locale)
 
+default_keymap = get_option('default-keymap')
+conf.set_quoted('SYSTEMD_DEFAULT_KEYMAP', default_keymap)
+
 localegen_path = get_option('localegen-path')
 if localegen_path != ''
         conf.set_quoted('LOCALEGEN_PATH', localegen_path)

meson_options.txt

@@ -312,6 +312,8 @@ option('default-locale', type : 'string', value : 'C.UTF-8',
        description : 'default locale used when /etc/locale.conf does not exist')
 option('nspawn-locale', type : 'string', value : 'C.UTF-8',
        description : 'default locale used by systemd-nspawn when executing commands in a container')
+option('default-keymap', type : 'string', value : 'us',
+       description : 'default keymap used when populating /etc/vconsole.conf')
 option('localegen-path', type : 'string', value : '',
        description : 'absolute path to the locale-gen binary in case the system is using locale-gen')
 option('service-watchdog', type : 'string', value : '3min',

src/vconsole/vconsole-setup.c

@@ -415,9 +415,10 @@ static int verify_source_vc(char **ret_path, const char *src_vc) {
 int main(int argc, char **argv) {
         _cleanup_free_ char
                 *vc = NULL,
-                *vc_keymap = NULL, *vc_keymap_toggle = NULL,
+                *vc_keymap_alloc = NULL, *vc_keymap_toggle = NULL,
                 *vc_font = NULL, *vc_font_map = NULL, *vc_font_unimap = NULL;
         _cleanup_close_ int fd = -EBADF;
+        const char *vc_keymap;
         bool utf8, keyboard_ok;
         unsigned idx = 0;
         int r;
@@ -437,7 +438,7 @@ int main(int argc, char **argv) {
 
         /* Load data from credentials (lowest priority) */
         r = read_credential_strings_many(
-                        "vconsole.keymap", &vc_keymap,
+                        "vconsole.keymap", &vc_keymap_alloc,
                         "vconsole.keymap_toggle", &vc_keymap_toggle,
                         "vconsole.font", &vc_font,
                         "vconsole.font_map", &vc_font_map,
@@ -447,7 +448,7 @@ int main(int argc, char **argv) {
 
         /* Load data from configuration file (middle priority) */
         r = parse_env_file(NULL, "/etc/vconsole.conf",
-                           "KEYMAP", &vc_keymap,
+                           "KEYMAP", &vc_keymap_alloc,
                            "KEYMAP_TOGGLE", &vc_keymap_toggle,
                            "FONT", &vc_font,
                            "FONT_MAP", &vc_font_map,
@@ -458,7 +459,7 @@ int main(int argc, char **argv) {
         /* Let the kernel command line override /etc/vconsole.conf (highest priority) */
         r = proc_cmdline_get_key_many(
                         PROC_CMDLINE_STRIP_RD_PREFIX,
-                        "vconsole.keymap", &vc_keymap,
+                        "vconsole.keymap", &vc_keymap_alloc,
                         "vconsole.keymap_toggle", &vc_keymap_toggle,
                         "vconsole.font", &vc_font,
                         "vconsole.font_map", &vc_font_map,
@@ -470,6 +471,8 @@ int main(int argc, char **argv) {
         if (r < 0 && r != -ENOENT)
                 log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");
 
+        vc_keymap = isempty(vc_keymap_alloc) ? SYSTEMD_DEFAULT_KEYMAP : vc_keymap_alloc;
+
         (void) toggle_utf8_sysfs(utf8);
         (void) toggle_utf8_vc(vc, fd, utf8);
 

tmpfiles.d/etc.conf.in

@@ -14,6 +14,7 @@ t /etc/mtab - - - - security.SMACK64=_
 {% endif %}
 C! /etc/locale.conf - - - -
 C! /etc/nsswitch.conf - - - -
+C! /etc/vconsole.conf - - - -
 {% if HAVE_PAM %}
 C! /etc/pam.d - - - -
 {% endif %}