gnu: Add localed, extracted from systemd.

* gnu/packages/freedesktop.scm (localed): New variable.
* gnu/packages/patches/localed-xorg-keyboard.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

1 files changed, 322 insertions, 0 deletions

diff --git a/gnu/packages/patches/localed-xorg-keyboard.patch b/gnu/packages/patches/localed-xorg-keyboard.patch
new file mode 100644
index 0000000000..9a9071ba0a
--- /dev/null
+++ b/gnu/packages/patches/localed-xorg-keyboard.patch
@@ -0,0 +1,322 @@
+Normally localed would do an approximate parsing of the Xorg config file
+to determine the XKB keyboard layout.  This doesn't make sense on Guix
+where there's no such file in /etc, and where the keyboard layout is
+known statically at configuration time.
+
+This patch removes the XOrg configuration parsing and expects to read the
+configuration from environment variables instead.  It also removes the
+stateful bits that would write configuration to /etc/vconsole.conf
+and /etc/X11, which are unused in Guix anyway.
+
+Patch by Ludovic Courtès <ludo@gnu.org>.
+
+diff --git a/src/locale/keymap-util.c b/src/locale/keymap-util.c
+index 6b6b32a591..46aab472b0 100644
+--- a/src/locale/keymap-util.c
++++ b/src/locale/keymap-util.c
+@@ -174,32 +174,16 @@ int vconsole_read_data(Context *c, sd_bus_message *m) {
+                 c->vc_cache = sd_bus_message_ref(m);
+         }
+ 
+-        if (stat("/etc/vconsole.conf", &st) < 0) {
+-                if (errno != ENOENT)
+-                        return -errno;
+-
+-                c->vc_mtime = USEC_INFINITY;
+-                context_free_vconsole(c);
+-                return 0;
+-        }
+-
+-        /* If mtime is not changed, then we do not need to re-read */
+-        t = timespec_load(&st.st_mtim);
+-        if (c->vc_mtime != USEC_INFINITY && t == c->vc_mtime)
+-                return 0;
+-
+-        c->vc_mtime = t;
++        c->vc_mtime = USEC_INFINITY;
+         context_free_vconsole(c);
+-
+-        r = parse_env_file(NULL, "/etc/vconsole.conf",
+-                           "KEYMAP",        &c->vc_keymap,
+-                           "KEYMAP_TOGGLE", &c->vc_keymap_toggle);
+-        if (r < 0)
+-                return r;
+-
+         return 0;
+ }
+ 
++static char *getenv_strdup(const char *variable) {
++        const char *value = getenv(variable);
++        return value == NULL ? NULL : strdup(value);
++}
++
+ int x11_read_data(Context *c, sd_bus_message *m) {
+         _cleanup_fclose_ FILE *f = NULL;
+         bool in_section = false;
+@@ -216,258 +200,27 @@ int x11_read_data(Context *c, sd_bus_message *m) {
+                 c->x11_cache = sd_bus_message_ref(m);
+         }
+ 
+-        if (stat("/etc/X11/xorg.conf.d/00-keyboard.conf", &st) < 0) {
+-                if (errno != ENOENT)
+-                        return -errno;
+-
+-                c->x11_mtime = USEC_INFINITY;
+-                context_free_x11(c);
+-                return 0;
+-        }
+-
+-        /* If mtime is not changed, then we do not need to re-read */
+-        t = timespec_load(&st.st_mtim);
+-        if (c->x11_mtime != USEC_INFINITY && t == c->x11_mtime)
+-                return 0;
+-
+-        c->x11_mtime = t;
++        c->x11_mtime = 0;
+         context_free_x11(c);
+ 
+-        f = fopen("/etc/X11/xorg.conf.d/00-keyboard.conf", "re");
+-        if (!f)
+-                return -errno;
+-
+-        for (;;) {
+-                _cleanup_free_ char *line = NULL;
+-                char *l;
+-
+-                r = read_line(f, LONG_LINE_MAX, &line);
+-                if (r < 0)
+-                        return r;
+-                if (r == 0)
+-                        break;
+-
+-                l = strstrip(line);
+-                if (IN_SET(l[0], 0, '#'))
+-                        continue;
+-
+-                if (in_section && first_word(l, "Option")) {
+-                        _cleanup_strv_free_ char **a = NULL;
+-
+-                        r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_QUOTES);
+-                        if (r < 0)
+-                                return r;
+-
+-                        if (strv_length(a) == 3) {
+-                                char **p = NULL;
+-
+-                                if (streq(a[1], "XkbLayout"))
+-                                        p = &c->x11_layout;
+-                                else if (streq(a[1], "XkbModel"))
+-                                        p = &c->x11_model;
+-                                else if (streq(a[1], "XkbVariant"))
+-                                        p = &c->x11_variant;
+-                                else if (streq(a[1], "XkbOptions"))
+-                                        p = &c->x11_options;
+-
+-                                if (p) {
+-                                        free_and_replace(*p, a[2]);
+-                                }
+-                        }
+-
+-                } else if (!in_section && first_word(l, "Section")) {
+-                        _cleanup_strv_free_ char **a = NULL;
+-
+-                        r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_QUOTES);
+-                        if (r < 0)
+-                                return -ENOMEM;
+-
+-                        if (strv_length(a) == 2 && streq(a[1], "InputClass"))
+-                                in_section = true;
+-
+-                } else if (in_section && first_word(l, "EndSection"))
+-                        in_section = false;
+-        }
++        c->x11_layout = getenv_strdup("GUIX_XKB_LAYOUT");
++        c->x11_model = getenv_strdup("GUIX_XKB_MODEL");
++        c->x11_variant = getenv_strdup("GUIX_XKB_VARIANT");
++        c->x11_options = getenv_strdup("GUIX_XKB_OPTIONS");
+ 
+         return 0;
+ }
+ 
+ int locale_write_data(Context *c, char ***settings) {
+-        _cleanup_strv_free_ char **l = NULL;
+-        struct stat st;
+-        int r, p;
+-
+-        /* Set values will be returned as strv in *settings on success. */
+-
+-        for (p = 0; p < _VARIABLE_LC_MAX; p++) {
+-                _cleanup_free_ char *t = NULL;
+-                char **u;
+-                const char *name;
+-
+-                name = locale_variable_to_string(p);
+-                assert(name);
+-
+-                if (isempty(c->locale[p]))
+-                        continue;
+-
+-                if (asprintf(&t, "%s=%s", name, c->locale[p]) < 0)
+-                        return -ENOMEM;
+-
+-                u = strv_env_set(l, t);
+-                if (!u)
+-                        return -ENOMEM;
+-
+-                strv_free_and_replace(l, u);
+-        }
+-
+-        if (strv_isempty(l)) {
+-                if (unlink("/etc/locale.conf") < 0)
+-                        return errno == ENOENT ? 0 : -errno;
+-
+-                c->locale_mtime = USEC_INFINITY;
+-                return 0;
+-        }
+-
+-        r = write_env_file_label("/etc/locale.conf", l);
+-        if (r < 0)
+-                return r;
+-
+-        *settings = TAKE_PTR(l);
+-
+-        if (stat("/etc/locale.conf", &st) >= 0)
+-                c->locale_mtime = timespec_load(&st.st_mtim);
+-
+-        return 0;
++        return -ENOSYS;
+ }
+ 
+ int vconsole_write_data(Context *c) {
+-        _cleanup_strv_free_ char **l = NULL;
+-        struct stat st;
+-        int r;
+-
+-        r = load_env_file(NULL, "/etc/vconsole.conf", &l);
+-        if (r < 0 && r != -ENOENT)
+-                return r;
+-
+-        if (isempty(c->vc_keymap))
+-                l = strv_env_unset(l, "KEYMAP");
+-        else {
+-                _cleanup_free_ char *s = NULL;
+-                char **u;
+-
+-                s = strappend("KEYMAP=", c->vc_keymap);
+-                if (!s)
+-                        return -ENOMEM;
+-
+-                u = strv_env_set(l, s);
+-                if (!u)
+-                        return -ENOMEM;
+-
+-                strv_free_and_replace(l, u);
+-        }
+-
+-        if (isempty(c->vc_keymap_toggle))
+-                l = strv_env_unset(l, "KEYMAP_TOGGLE");
+-        else  {
+-                _cleanup_free_ char *s = NULL;
+-                char **u;
+-
+-                s = strappend("KEYMAP_TOGGLE=", c->vc_keymap_toggle);
+-                if (!s)
+-                        return -ENOMEM;
+-
+-                u = strv_env_set(l, s);
+-                if (!u)
+-                        return -ENOMEM;
+-
+-                strv_free_and_replace(l, u);
+-        }
+-
+-        if (strv_isempty(l)) {
+-                if (unlink("/etc/vconsole.conf") < 0)
+-                        return errno == ENOENT ? 0 : -errno;
+-
+-                c->vc_mtime = USEC_INFINITY;
+-                return 0;
+-        }
+-
+-        r = write_env_file_label("/etc/vconsole.conf", l);
+-        if (r < 0)
+-                return r;
+-
+-        if (stat("/etc/vconsole.conf", &st) >= 0)
+-                c->vc_mtime = timespec_load(&st.st_mtim);
+-
+-        return 0;
++        return -ENOSYS;
+ }
+ 
+ int x11_write_data(Context *c) {
+-        _cleanup_fclose_ FILE *f = NULL;
+-        _cleanup_free_ char *temp_path = NULL;
+-        struct stat st;
+-        int r;
+-
+-        if (isempty(c->x11_layout) &&
+-            isempty(c->x11_model) &&
+-            isempty(c->x11_variant) &&
+-            isempty(c->x11_options)) {
+-
+-                if (unlink("/etc/X11/xorg.conf.d/00-keyboard.conf") < 0)
+-                        return errno == ENOENT ? 0 : -errno;
+-
+-                c->vc_mtime = USEC_INFINITY;
+-                return 0;
+-        }
+-
+-        mkdir_p_label("/etc/X11/xorg.conf.d", 0755);
+-
+-        r = fopen_temporary("/etc/X11/xorg.conf.d/00-keyboard.conf", &f, &temp_path);
+-        if (r < 0)
+-                return r;
+-
+-        (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
+-        (void) fchmod(fileno(f), 0644);
+-
+-        fputs("# Written by systemd-localed(8), read by systemd-localed and Xorg. It's\n"
+-              "# probably wise not to edit this file manually. Use localectl(1) to\n"
+-              "# instruct systemd-localed to update it.\n"
+-              "Section \"InputClass\"\n"
+-              "        Identifier \"system-keyboard\"\n"
+-              "        MatchIsKeyboard \"on\"\n", f);
+-
+-        if (!isempty(c->x11_layout))
+-                fprintf(f, "        Option \"XkbLayout\" \"%s\"\n", c->x11_layout);
+-
+-        if (!isempty(c->x11_model))
+-                fprintf(f, "        Option \"XkbModel\" \"%s\"\n", c->x11_model);
+-
+-        if (!isempty(c->x11_variant))
+-                fprintf(f, "        Option \"XkbVariant\" \"%s\"\n", c->x11_variant);
+-
+-        if (!isempty(c->x11_options))
+-                fprintf(f, "        Option \"XkbOptions\" \"%s\"\n", c->x11_options);
+-
+-        fputs("EndSection\n", f);
+-
+-        r = fflush_sync_and_check(f);
+-        if (r < 0)
+-                goto fail;
+-
+-        if (rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
+-                r = -errno;
+-                goto fail;
+-        }
+-
+-        if (stat("/etc/X11/xorg.conf.d/00-keyboard.conf", &st) >= 0)
+-                c->x11_mtime = timespec_load(&st.st_mtim);
+-
+-        return 0;
+-
+-fail:
+-        if (temp_path)
+-                (void) unlink(temp_path);
+-
+-        return r;
++        return -ENOSYS;
+ }
+ 
+ static int read_next_mapping(const char* filename,