| /*-*- 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 <locale.h> |
| #include <string.h> |
| #include <sys/timex.h> |
| #include <sys/utsname.h> |
| |
| #include "dbus-common.h" |
| #include "util.h" |
| #include "spawn-polkit-agent.h" |
| #include "build.h" |
| #include "hwclock.h" |
| #include "strv.h" |
| #include "sd-id128.h" |
| #include "virt.h" |
| |
| 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_set_transient = false; |
| static bool arg_set_pretty = false; |
| static bool arg_set_static = false; |
| |
| 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 { |
| const char *hostname; |
| const char *static_hostname; |
| const char *pretty_hostname; |
| const char *icon_name; |
| const char *chassis; |
| } StatusInfo; |
| |
| static void print_status_info(StatusInfo *i) { |
| sd_id128_t mid, bid; |
| int r; |
| const char *id = NULL; |
| _cleanup_free_ char *pretty_name = NULL, *cpe_name = NULL; |
| struct utsname u; |
| |
| assert(i); |
| |
| printf(" Static hostname: %s\n", |
| strna(i->static_hostname)); |
| |
| if (!streq_ptr(i->hostname, i->static_hostname)) |
| printf("Transient hostname: %s\n", |
| strna(i->hostname)); |
| |
| printf(" Pretty hostname: %s\n" |
| " Icon name: %s\n" |
| " Chassis: %s\n", |
| strna(i->pretty_hostname), |
| strna(i->icon_name), |
| strna(i->chassis)); |
| |
| r = sd_id128_get_machine(&mid); |
| if (r >= 0) |
| printf(" Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid)); |
| |
| r = sd_id128_get_boot(&bid); |
| if (r >= 0) |
| printf(" Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid)); |
| |
| if (detect_virtualization(&id) > 0) |
| printf(" Virtualization: %s\n", id); |
| |
| r = parse_env_file("/etc/os-release", NEWLINE, |
| "PRETTY_NAME", &pretty_name, |
| "CPE_NAME", &cpe_name, |
| NULL); |
| |
| if (!isempty(pretty_name)) |
| printf(" Operating System: %s\n", pretty_name); |
| |
| if (!isempty(cpe_name)) |
| printf(" CPE OS Name: %s\n", cpe_name); |
| |
| assert_se(uname(&u) >= 0); |
| printf(" Kernel: %s %s\n" |
| " Architecture: %s\n", u.sysname, u.release, u.machine); |
| |
| } |
| |
| static int status_property(const char *name, DBusMessageIter *iter, StatusInfo *i) { |
| 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, "Hostname")) |
| i->hostname = s; |
| if (streq(name, "StaticHostname")) |
| i->static_hostname = s; |
| if (streq(name, "PrettyHostname")) |
| i->pretty_hostname = s; |
| if (streq(name, "IconName")) |
| i->icon_name = s; |
| if (streq(name, "Chassis")) |
| i->chassis = s; |
| } |
| break; |
| } |
| } |
| |
| 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.hostname1", |
| "/org/freedesktop/hostname1", |
| "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); |
| return 0; |
| } |
| |
| static char* hostname_simplify(char *s) { |
| char *p, *d; |
| |
| for (p = s, d = s; *p; p++) { |
| if ((*p >= 'a' && *p <= 'z') || |
| (*p >= '0' && *p <= '9') || |
| *p == '-' || *p == '_') |
| *(d++) = *p; |
| else if (*p >= 'A' && *p <= 'Z') |
| *(d++) = *p - 'A' + 'a'; |
| else if (*p == ' ') |
| *(d++) = '-'; |
| } |
| |
| *d = 0; |
| |
| strshorten(s, HOST_NAME_MAX); |
| return s; |
| } |
| |
| static int set_hostname(DBusConnection *bus, char **args, unsigned n) { |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| dbus_bool_t interactive = true; |
| _cleanup_free_ char *h = NULL; |
| const char *hostname = args[1]; |
| int r; |
| |
| assert(args); |
| assert(n == 2); |
| |
| polkit_agent_open_if_enabled(); |
| |
| if (arg_set_pretty) { |
| r = bus_method_call_with_reply( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetPrettyHostname", |
| &reply, |
| NULL, |
| DBUS_TYPE_STRING, &hostname, |
| DBUS_TYPE_BOOLEAN, &interactive, |
| DBUS_TYPE_INVALID); |
| if (r < 0) |
| return r; |
| |
| h = strdup(hostname); |
| if (!h) |
| return log_oom(); |
| |
| hostname = hostname_simplify(h); |
| } |
| |
| if (arg_set_static) { |
| r = bus_method_call_with_reply( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetStaticHostname", |
| &reply, |
| NULL, |
| DBUS_TYPE_STRING, &hostname, |
| DBUS_TYPE_BOOLEAN, &interactive, |
| DBUS_TYPE_INVALID); |
| |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_set_transient) { |
| r = bus_method_call_with_reply( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetHostname", |
| &reply, |
| NULL, |
| DBUS_TYPE_STRING, &hostname, |
| DBUS_TYPE_BOOLEAN, &interactive, |
| DBUS_TYPE_INVALID); |
| |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int set_icon_name(DBusConnection *bus, char **args, unsigned n) { |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| dbus_bool_t interactive = true; |
| |
| assert(args); |
| assert(n == 2); |
| |
| polkit_agent_open_if_enabled(); |
| |
| return bus_method_call_with_reply( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetIconName", |
| &reply, |
| NULL, |
| DBUS_TYPE_STRING, &args[1], |
| DBUS_TYPE_BOOLEAN, &interactive, |
| DBUS_TYPE_INVALID); |
| } |
| |
| static int set_chassis(DBusConnection *bus, char **args, unsigned n) { |
| _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; |
| dbus_bool_t interactive = true; |
| |
| assert(args); |
| assert(n == 2); |
| |
| polkit_agent_open_if_enabled(); |
| |
| return bus_method_call_with_reply( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| "SetChassis", |
| &reply, |
| NULL, |
| DBUS_TYPE_STRING, &args[1], |
| DBUS_TYPE_BOOLEAN, &interactive, |
| DBUS_TYPE_INVALID); |
| } |
| |
| static int help(void) { |
| |
| printf("%s [OPTIONS...] COMMAND ...\n\n" |
| "Query or change system hostname.\n\n" |
| " -h --help Show this help\n" |
| " --version Show package version\n" |
| " --transient Only set transient hostname\n" |
| " --static Only set static hostname\n" |
| " --pretty Only set pretty hostname\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 hostname settings\n" |
| " set-hostname NAME Set system hostname\n" |
| " set-icon-name NAME Set icon name for host\n" |
| " set-chassis NAME Set chassis type for host\n", |
| program_invocation_short_name); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| |
| enum { |
| ARG_VERSION = 0x100, |
| ARG_NO_ASK_PASSWORD, |
| ARG_SET_TRANSIENT, |
| ARG_SET_STATIC, |
| ARG_SET_PRETTY |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "transient", no_argument, NULL, ARG_SET_TRANSIENT }, |
| { "static", no_argument, NULL, ARG_SET_STATIC }, |
| { "pretty", no_argument, NULL, ARG_SET_PRETTY }, |
| { "host", required_argument, NULL, 'H' }, |
| { "privileged", no_argument, NULL, 'P' }, |
| { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, |
| { NULL, 0, NULL, 0 } |
| }; |
| |
| int c; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "hH:P", options, NULL)) >= 0) { |
| |
| switch (c) { |
| |
| case 'h': |
| help(); |
| return 0; |
| |
| case ARG_VERSION: |
| puts(PACKAGE_STRING); |
| puts(SYSTEMD_FEATURES); |
| return 0; |
| |
| case 'P': |
| arg_transport = TRANSPORT_POLKIT; |
| break; |
| |
| case 'H': |
| arg_transport = TRANSPORT_SSH; |
| arg_host = optarg; |
| break; |
| |
| case ARG_SET_TRANSIENT: |
| arg_set_transient = true; |
| break; |
| |
| case ARG_SET_PRETTY: |
| arg_set_pretty = true; |
| break; |
| |
| case ARG_SET_STATIC: |
| arg_set_static = true; |
| break; |
| |
| case ARG_NO_ASK_PASSWORD: |
| arg_ask_password = false; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| log_error("Unknown option code %c", c); |
| return -EINVAL; |
| } |
| } |
| |
| if (!arg_set_transient && !arg_set_pretty && !arg_set_static) |
| arg_set_transient = arg_set_pretty = arg_set_static = true; |
| |
| return 1; |
| } |
| |
| static int hostnamectl_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-hostname", EQUAL, 2, set_hostname }, |
| { "set-icon-name", EQUAL, 2, set_icon_name }, |
| { "set-chassis", EQUAL, 2, set_chassis }, |
| }; |
| |
| 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); |
| |
| setlocale(LC_ALL, ""); |
| 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 = hostnamectl_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(); |
| |
| return retval; |
| } |