locale: add client tool localectl similar to hostnamectl/timedatectl

1 files changed, 778 insertions, 0 deletions

diff --git a/src/locale/localectl.c b/src/locale/localectl.c
new file mode 100644
index 000000000..c05eba0d3
--- /dev/null
+++ b/src/locale/localectl.c
@@ -0,0 +1,778 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <string.h>
+#include <ftw.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+
+#include "dbus-common.h"
+#include "util.h"
+#include "spawn-polkit-agent.h"
+#include "build.h"
+#include "strv.h"
+#include "pager.h"
+#include "set.h"
+#include "path-util.h"
+
+static bool arg_no_pager = false;
+static enum transport {
+        TRANSPORT_NORMAL,
+        TRANSPORT_SSH,
+        TRANSPORT_POLKIT
+} arg_transport = TRANSPORT_NORMAL;
+static bool arg_ask_password = true;
+static const char *arg_host = NULL;
+static bool arg_convert = true;
+
+static void pager_open_if_enabled(void) {
+
+        if (arg_no_pager)
+                return;
+
+        pager_open();
+}
+
+static void polkit_agent_open_if_enabled(void) {
+
+        /* Open the polkit agent as a child process if necessary */
+
+        if (!arg_ask_password)
+                return;
+
+        polkit_agent_open();
+}
+
+typedef struct StatusInfo {
+        char **locale;
+        const char *vconsole_keymap;
+        const char *vconsole_keymap_toggle;
+        const char *x11_layout;
+        const char *x11_model;
+        const char *x11_variant;
+        const char *x11_options;
+} StatusInfo;
+
+static void print_status_info(StatusInfo *i) {
+        assert(i);
+
+        if (strv_isempty(i->locale))
+                puts("   System Locale: n/a\n");
+        else {
+                char **j;
+
+                printf("   System Locale: %s\n", i->locale[0]);
+                STRV_FOREACH(j, i->locale + 1)
+                        printf("                  %s\n", *j);
+        }
+
+        printf("       VC Keymap: %s\n", strna(i->vconsole_keymap));
+        if (!isempty(i->vconsole_keymap_toggle))
+                printf("VC Toggle Keymap: %s\n", i->vconsole_keymap_toggle);
+
+        printf("      X11 Layout: %s\n", strna(i->x11_layout));
+        if (!isempty(i->x11_model))
+                printf("       X11 Model: %s\n", i->x11_model);
+        if (!isempty(i->x11_variant))
+                printf("     X11 Variant: %s\n", i->x11_variant);
+        if (!isempty(i->x11_options))
+                printf("     X11 Options: %s\n", i->x11_options);
+}
+
+static int status_property(const char *name, DBusMessageIter *iter, StatusInfo *i) {
+        int r;
+
+        assert(name);
+        assert(iter);
+
+        switch (dbus_message_iter_get_arg_type(iter)) {
+
+        case DBUS_TYPE_STRING: {
+                const char *s;
+
+                dbus_message_iter_get_basic(iter, &s);
+                if (!isempty(s)) {
+                        if (streq(name, "VConsoleKeymap"))
+                                i->vconsole_keymap = s;
+                        else if (streq(name, "VConsoleKeymapToggle"))
+                                i->vconsole_keymap_toggle = s;
+                        else if (streq(name, "X11Layout"))
+                                i->x11_layout = s;
+                        else if (streq(name, "X11Model"))
+                                i->x11_model = s;
+                        else if (streq(name, "X11Variant"))
+                                i->x11_variant = s;
+                        else if (streq(name, "X11Options"))
+                                i->x11_options = s;
+                }
+                break;
+        }
+
+        case DBUS_TYPE_ARRAY:
+
+                if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
+                        char **l;
+
+                        r = bus_parse_strv_iter(iter, &l);
+                        if (r < 0)
+                                return r;
+
+                        if (streq(name, "Locale")) {
+                                strv_free(i->locale);
+                                i->locale = l;
+                                l = NULL;
+                        }
+
+                        strv_free(l);
+                }
+        }
+
+        return 0;
+}
+
+static int show_status(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        const char *interface = "";
+        int r;
+        DBusMessageIter iter, sub, sub2, sub3;
+        StatusInfo info;
+
+        assert(args);
+
+        r = bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.locale1",
+                        "/org/freedesktop/locale1",
+                        "org.freedesktop.DBus.Properties",
+                        "GetAll",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_STRING, &interface,
+                        DBUS_TYPE_INVALID);
+        if (r < 0)
+                return r;
+
+        if (!dbus_message_iter_init(reply, &iter) ||
+            dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
+            dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
+                log_error("Failed to parse reply.");
+                return -EIO;
+        }
+
+        zero(info);
+        dbus_message_iter_recurse(&iter, &sub);
+
+        while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+                const char *name;
+
+                if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                dbus_message_iter_recurse(&sub, &sub2);
+
+                if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                dbus_message_iter_recurse(&sub2, &sub3);
+
+                r = status_property(name, &sub3, &info);
+                if (r < 0) {
+                        log_error("Failed to parse reply.");
+                        return r;
+                }
+
+                dbus_message_iter_next(&sub);
+        }
+
+        print_status_info(&info);
+        strv_free(info.locale);
+        return 0;
+}
+
+static int set_locale(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
+        dbus_bool_t interactive = true;
+        DBusError error;
+        DBusMessageIter iter;
+        int r;
+
+        assert(bus);
+        assert(args);
+
+        dbus_error_init(&error);
+
+        polkit_agent_open_if_enabled();
+
+        m = dbus_message_new_method_call(
+                        "org.freedesktop.locale1",
+                        "/org/freedesktop/locale1",
+                        "org.freedesktop.locale1",
+                        "SetLocale");
+        if (!m)
+                return log_oom();
+
+        dbus_message_iter_init_append(m, &iter);
+
+        r = bus_append_strv_iter(&iter, args + 1);
+        if (r < 0)
+                return log_oom();
+
+        if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &interactive))
+                return log_oom();
+
+        reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+        if (!reply) {
+                log_error("Failed to issue method call: %s", bus_error_message(&error));
+                r = -EIO;
+                goto finish;
+        }
+
+        r = 0;
+
+finish:
+        dbus_error_free(&error);
+        return r;
+}
+
+static int list_locales(DBusConnection *bus, char **args, unsigned n) {
+        /* Stolen from glibc... */
+
+        struct locarhead {
+                uint32_t magic;
+                /* Serial number.  */
+                uint32_t serial;
+                /* Name hash table.  */
+                uint32_t namehash_offset;
+                uint32_t namehash_used;
+                uint32_t namehash_size;
+                /* String table.  */
+                uint32_t string_offset;
+                uint32_t string_used;
+                uint32_t string_size;
+                /* Table with locale records.  */
+                uint32_t locrectab_offset;
+                uint32_t locrectab_used;
+                uint32_t locrectab_size;
+                /* MD5 sum hash table.  */
+                uint32_t sumhash_offset;
+                uint32_t sumhash_used;
+                uint32_t sumhash_size;
+        };
+
+        struct namehashent {
+                /* Hash value of the name.  */
+                uint32_t hashval;
+                /* Offset of the name in the string table.  */
+                uint32_t name_offset;
+                /* Offset of the locale record.  */
+                uint32_t locrec_offset;
+        };
+
+        const struct locarhead *h;
+        const struct namehashent *e;
+        const void *p = MAP_FAILED;
+        _cleanup_close_ int fd = -1;
+        _cleanup_strv_free_ char **l = NULL;
+        char **j;
+        Set *locales;
+        size_t sz = 0;
+        struct stat st;
+        unsigned i;
+        int r;
+
+        locales = set_new(string_hash_func, string_compare_func);
+        if (!locales)
+                return log_oom();
+
+        fd = open("/usr/lib/locale/locale-archive", O_RDONLY|O_NOCTTY|O_CLOEXEC);
+        if (fd < 0) {
+                log_error("Failed to open locale archive: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        if (fstat(fd, &st) < 0) {
+                log_error("fstat() failed: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        if (!S_ISREG(st.st_mode)) {
+                log_error("Archive file is not regular");
+                r = -EBADMSG;
+                goto finish;
+        }
+
+        if (st.st_size < (off_t) sizeof(struct locarhead)) {
+                log_error("Archive has invalid size");
+                r = -EBADMSG;
+                goto finish;
+        }
+
+        p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+        if (p == MAP_FAILED) {
+                log_error("Failed to map archive: %m");
+                r = -errno;
+                goto finish;
+        }
+
+        h = (const struct locarhead *) p;
+        if (h->magic != 0xde020109 ||
+            h->namehash_offset + h->namehash_size > st.st_size ||
+            h->string_offset + h->string_size > st.st_size ||
+            h->locrectab_offset + h->locrectab_size > st.st_size ||
+            h->sumhash_offset + h->sumhash_size > st.st_size) {
+                log_error("Invalid archive file.");
+                return -EBADMSG;
+        }
+
+        e = (const struct namehashent*) ((const uint8_t*) p + h->namehash_offset);
+        for (i = 0; i < h->namehash_size; i++) {
+                char *z;
+
+                if (e[i].locrec_offset == 0)
+                        continue;
+
+                z = strdup((char*) p + e[i].name_offset);
+                if (!z) {
+                        r = log_oom();
+                        goto finish;
+                }
+
+                r = set_put(locales, z);
+                if (r < 0) {
+                        free(z);
+                        log_error("Failed to add locale: %s", strerror(-r));
+                        goto finish;
+                }
+        }
+
+        l = set_get_strv(locales);
+        if (!l) {
+                r = log_oom();
+                goto finish;
+        }
+
+        set_free(locales);
+        locales = NULL;
+
+        strv_sort(l);
+
+        pager_open_if_enabled();
+
+        STRV_FOREACH(j, l)
+                puts(*j);
+
+        r = 0;
+
+finish:
+        if (p != MAP_FAILED)
+                munmap((void*) p, sz);
+
+        set_free_free(locales);
+
+        return r;
+}
+
+static int set_vconsole_keymap(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t interactive = true, b;
+        const char *map, *toggle_map;
+
+        assert(bus);
+        assert(args);
+
+        if (n > 3) {
+                log_error("Too many arguments.");
+                return -EINVAL;
+        }
+
+        polkit_agent_open_if_enabled();
+
+        map = args[1];
+        toggle_map = n > 2 ? args[2] : "";
+        b = arg_convert;
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.locale1",
+                        "/org/freedesktop/locale1",
+                        "org.freedesktop.locale1",
+                        "SetVConsoleKeyboard",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_STRING, &map,
+                        DBUS_TYPE_STRING, &toggle_map,
+                        DBUS_TYPE_BOOLEAN, &b,
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static Set *keymaps = NULL;
+
+static int nftw_cb(
+                const char *fpath,
+                const struct stat *sb,
+                int tflag,
+                struct FTW *ftwbuf) {
+
+        char *p, *e;
+        int r;
+
+        if (tflag != FTW_F)
+                return 0;
+
+        if (!endswith(fpath, ".map") &&
+            !endswith(fpath, ".map.gz"))
+                return 0;
+
+        p = strdup(path_get_file_name(fpath));
+        if (!p)
+                return log_oom();
+
+        e = endswith(p, ".map");
+        if (e)
+                *e = 0;
+
+        e = endswith(p, ".map.gz");
+        if (e)
+                *e = 0;
+
+        r = set_put(keymaps, p);
+        if (r == -EEXIST)
+                free(p);
+        else if (r < 0) {
+                log_error("Can't add keymap: %s", strerror(-r));
+                free(p);
+                return r;
+        }
+
+        return 0;
+}
+
+static int list_vconsole_keymaps(DBusConnection *bus, char **args, unsigned n) {
+        char **l, **i;
+
+        keymaps = set_new(string_hash_func, string_compare_func);
+        if (!keymaps)
+                return log_oom();
+
+        nftw("/usr/share/kbd/keymaps/", nftw_cb, 20, FTW_MOUNT|FTW_PHYS);
+        nftw("/usr/lib/kbd/keymaps/", nftw_cb, 20, FTW_MOUNT|FTW_PHYS);
+        nftw("/lib/kbd/keymaps/", nftw_cb, 20, FTW_MOUNT|FTW_PHYS);
+
+        l = set_get_strv(keymaps);
+        if (!l) {
+                set_free_free(keymaps);
+                return log_oom();
+        }
+
+        set_free(keymaps);
+
+        if (strv_isempty(l)) {
+                log_error("Couldn't find any console keymaps.");
+                return -ENOENT;
+        }
+
+        strv_sort(l);
+
+        pager_open_if_enabled();
+
+        STRV_FOREACH(i, l)
+                puts(*i);
+
+        strv_free(l);
+
+        return 0;
+}
+
+static int set_x11_keymap(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t interactive = true, b;
+        const char *layout, *model, *variant, *options;
+
+        assert(bus);
+        assert(args);
+
+        if (n > 5) {
+                log_error("Too many arguments.");
+                return -EINVAL;
+        }
+
+        polkit_agent_open_if_enabled();
+
+        layout = args[1];
+        model = n > 2 ? args[2] : "";
+        variant = n > 3 ? args[3] : "";
+        options = n > 3 ? args[4] : "";
+        b = arg_convert;
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.locale1",
+                        "/org/freedesktop/locale1",
+                        "org.freedesktop.locale1",
+                        "SetX11Keyboard",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_STRING, &layout,
+                        DBUS_TYPE_STRING, &model,
+                        DBUS_TYPE_STRING, &variant,
+                        DBUS_TYPE_STRING, &options,
+                        DBUS_TYPE_BOOLEAN, &b,
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static int help(void) {
+
+        printf("%s [OPTIONS...] COMMAND ...\n\n"
+               "Query or change system time and date settings.\n\n"
+               "  -h --help              Show this help\n"
+               "     --version           Show package version\n"
+               "     --no-convert        Don't convert keyboard mappings\n"
+               "     --no-pager          Do not pipe output into a pager\n"
+               "     --no-ask-password   Do not prompt for password\n"
+               "  -H --host=[USER@]HOST  Operate on remote host\n\n"
+               "Commands:\n"
+               "  status                 Show current locale settings\n"
+               "  set-locale LOCALE...   Set system locale\n"
+               "  list-locales           Show known locales\n"
+               "  set-keymap MAP [MAP]   Set virtual console keyboard mapping\n"
+               "  list-keymaps           Show known virtual console keyboard mappings\n"
+               "  set-x11-keymap LAYOUT [MODEL] [VARIANT] [OPTIONS]\n"
+               "                         Set X11 keyboard mapping\n",
+               program_invocation_short_name);
+
+        return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_NO_PAGER,
+                ARG_NO_CONVERT,
+                ARG_NO_ASK_PASSWORD
+        };
+
+        static const struct option options[] = {
+                { "help",                no_argument,       NULL, 'h'                     },
+                { "version",             no_argument,       NULL, ARG_VERSION             },
+                { "no-pager",            no_argument,       NULL, ARG_NO_PAGER            },
+                { "host",                required_argument, NULL, 'H'                     },
+                { "privileged",          no_argument,       NULL, 'P'                     },
+                { "no-ask-password",     no_argument,       NULL, ARG_NO_ASK_PASSWORD     },
+                { "no-convert",          no_argument,       NULL, ARG_NO_CONVERT          },
+                { NULL,                  0,                 NULL, 0                       }
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "has:H:P", options, NULL)) >= 0) {
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        puts(PACKAGE_STRING);
+                        puts(DISTRIBUTION);
+                        puts(SYSTEMD_FEATURES);
+                        return 0;
+
+                case 'P':
+                        arg_transport = TRANSPORT_POLKIT;
+                        break;
+
+                case 'H':
+                        arg_transport = TRANSPORT_SSH;
+                        arg_host = optarg;
+                        break;
+
+                case ARG_NO_CONVERT:
+                        arg_convert = false;
+                        break;
+
+                case ARG_NO_PAGER:
+                        arg_no_pager = true;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        log_error("Unknown option code %c", c);
+                        return -EINVAL;
+                }
+        }
+
+        return 1;
+}
+
+static int localectl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
+
+        static const struct {
+                const char* verb;
+                const enum {
+                        MORE,
+                        LESS,
+                        EQUAL
+                } argc_cmp;
+                const int argc;
+                int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
+        } verbs[] = {
+                { "status",         LESS,   1, show_status           },
+                { "set-locale",     MORE,   2, set_locale            },
+                { "list-locales",   EQUAL,  1, list_locales          },
+                { "set-keymap",     MORE,   2, set_vconsole_keymap   },
+                { "list-keymaps",   EQUAL,  1, list_vconsole_keymaps },
+                { "set-x11-keymap", MORE,   2, set_x11_keymap        },
+        };
+
+        int left;
+        unsigned i;
+
+        assert(argc >= 0);
+        assert(argv);
+        assert(error);
+
+        left = argc - optind;
+
+        if (left <= 0)
+                /* Special rule: no arguments means "status" */
+                i = 0;
+        else {
+                if (streq(argv[optind], "help")) {
+                        help();
+                        return 0;
+                }
+
+                for (i = 0; i < ELEMENTSOF(verbs); i++)
+                        if (streq(argv[optind], verbs[i].verb))
+                                break;
+
+                if (i >= ELEMENTSOF(verbs)) {
+                        log_error("Unknown operation %s", argv[optind]);
+                        return -EINVAL;
+                }
+        }
+
+        switch (verbs[i].argc_cmp) {
+
+        case EQUAL:
+                if (left != verbs[i].argc) {
+                        log_error("Invalid number of arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        case MORE:
+                if (left < verbs[i].argc) {
+                        log_error("Too few arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        case LESS:
+                if (left > verbs[i].argc) {
+                        log_error("Too many arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        default:
+                assert_not_reached("Unknown comparison operator.");
+        }
+
+        if (!bus) {
+                log_error("Failed to get D-Bus connection: %s", error->message);
+                return -EIO;
+        }
+
+        return verbs[i].dispatch(bus, argv + optind, left);
+}
+
+int main(int argc, char *argv[]) {
+        int r, retval = EXIT_FAILURE;
+        DBusConnection *bus = NULL;
+        DBusError error;
+
+        dbus_error_init(&error);
+
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r < 0)
+                goto finish;
+        else if (r == 0) {
+                retval = EXIT_SUCCESS;
+                goto finish;
+        }
+
+        if (arg_transport == TRANSPORT_NORMAL)
+                bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
+        else if (arg_transport == TRANSPORT_POLKIT)
+                bus_connect_system_polkit(&bus, &error);
+        else if (arg_transport == TRANSPORT_SSH)
+                bus_connect_system_ssh(NULL, arg_host, &bus, &error);
+        else
+                assert_not_reached("Uh, invalid transport...");
+
+        r = localectl_main(bus, argc, argv, &error);
+        retval = r < 0 ? EXIT_FAILURE : r;
+
+finish:
+        if (bus) {
+                dbus_connection_flush(bus);
+                dbus_connection_close(bus);
+                dbus_connection_unref(bus);
+        }
+
+        dbus_error_free(&error);
+        dbus_shutdown();
+
+        pager_close();
+
+        return retval;
+}