| /*-*- 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 "sd-bus.h" |
| |
| #include "bus-util.h" |
| #include "bus-error.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" |
| #include "architecture.h" |
| #include "fileio.h" |
| |
| static bool arg_ask_password = true; |
| static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; |
| static char *arg_host = NULL; |
| static bool arg_transient = false; |
| static bool arg_pretty = false; |
| static bool arg_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; |
| |
| if (arg_transport != BUS_TRANSPORT_LOCAL) |
| return; |
| |
| polkit_agent_open(); |
| } |
| |
| typedef struct StatusInfo { |
| char *hostname; |
| char *static_hostname; |
| char *pretty_hostname; |
| char *icon_name; |
| 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 (!isempty(i->pretty_hostname) && |
| !streq_ptr(i->pretty_hostname, i->static_hostname)) |
| printf(" Pretty hostname: %s\n", |
| strna(i->pretty_hostname)); |
| |
| if (!isempty(i->hostname) && |
| !streq_ptr(i->hostname, i->static_hostname)) |
| printf("Transient hostname: %s\n", |
| strna(i->hostname)); |
| |
| printf(" Icon name: %s\n" |
| " Chassis: %s\n", |
| 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 (r < 0) |
| log_warning("Failed to read /etc/os-release: %s", strerror(-r)); |
| |
| 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, |
| architecture_to_string(uname_architecture())); |
| |
| } |
| |
| static int show_one_name(sd_bus *bus, const char* attr) { |
| _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| const char *s; |
| int r; |
| |
| r = sd_bus_get_property( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| attr, |
| &error, &reply, "s"); |
| if (r < 0) { |
| log_error("Could not get property: %s", bus_error_message(&error, -r)); |
| return r; |
| } |
| |
| r = sd_bus_message_read(reply, "s", &s); |
| if (r < 0) |
| return bus_log_parse_error(r); |
| |
| printf("%s\n", s); |
| |
| return 0; |
| } |
| |
| static int show_all_names(sd_bus *bus) { |
| StatusInfo info = {}; |
| static const struct bus_properties_map map[] = { |
| { "Hostname", "s", NULL, offsetof(StatusInfo, hostname) }, |
| { "StaticHostname", "s", NULL, offsetof(StatusInfo, static_hostname) }, |
| { "PrettyHostname", "s", NULL, offsetof(StatusInfo, pretty_hostname) }, |
| { "IconName", "s", NULL, offsetof(StatusInfo, icon_name) }, |
| { "Chassis", "s", NULL, offsetof(StatusInfo, chassis) }, |
| {} |
| }; |
| int r; |
| |
| r = bus_map_all_properties(bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| map, |
| &info); |
| if (r < 0) |
| goto fail; |
| |
| print_status_info(&info); |
| |
| fail: |
| free(info.hostname); |
| free(info.static_hostname); |
| free(info.pretty_hostname); |
| free(info.icon_name); |
| free(info.chassis); |
| return 0; |
| } |
| |
| static int show_status(sd_bus *bus, char **args, unsigned n) { |
| assert(args); |
| |
| if (arg_pretty || arg_static || arg_transient) { |
| const char *attr; |
| |
| if (!!arg_static + !!arg_pretty + !!arg_transient > 1) { |
| log_error("Cannot query more than one name type at a time"); |
| return -EINVAL; |
| } |
| |
| attr = arg_pretty ? "PrettyHostname" : |
| arg_static ? "StaticHostname" : "Hostname"; |
| |
| return show_one_name(bus, attr); |
| } else |
| return show_all_names(bus); |
| } |
| |
| static int set_simple_string(sd_bus *bus, const char *method, const char *value) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| int r = 0; |
| |
| polkit_agent_open_if_enabled(); |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.hostname1", |
| "/org/freedesktop/hostname1", |
| "org.freedesktop.hostname1", |
| method, |
| &error, NULL, |
| "sb", value, arg_ask_password); |
| if (r < 0) |
| log_error("Could not set property: %s", bus_error_message(&error, -r)); |
| return r; |
| } |
| |
| static int set_hostname(sd_bus *bus, char **args, unsigned n) { |
| _cleanup_free_ char *h = NULL; |
| const char *hostname = args[1]; |
| int r; |
| |
| assert(args); |
| assert(n == 2); |
| |
| if (!arg_pretty && !arg_static && !arg_transient) |
| arg_pretty = arg_static = arg_transient = true; |
| |
| if (arg_pretty) { |
| const char *p; |
| |
| /* If the passed hostname is already valid, then |
| * assume the user doesn't know anything about pretty |
| * hostnames, so let's unset the pretty hostname, and |
| * just set the passed hostname as static/dynamic |
| * hostname. */ |
| |
| h = strdup(hostname); |
| if (!h) |
| return log_oom(); |
| |
| hostname_cleanup(h, true); |
| |
| if (arg_static && streq(h, hostname)) |
| p = ""; |
| else { |
| p = hostname; |
| hostname = h; |
| } |
| |
| r = set_simple_string(bus, "SetPrettyHostname", p); |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_static) { |
| r = set_simple_string(bus, "SetStaticHostname", hostname); |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_transient) { |
| r = set_simple_string(bus, "SetHostname", hostname); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| static int set_icon_name(sd_bus *bus, char **args, unsigned n) { |
| assert(args); |
| assert(n == 2); |
| |
| return set_simple_string(bus, "SetIconName", args[1]); |
| } |
| |
| static int set_chassis(sd_bus *bus, char **args, unsigned n) { |
| assert(args); |
| assert(n == 2); |
| |
| return set_simple_string(bus, "SetChassis", args[1]); |
| } |
| |
| 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" |
| " --no-ask-password Do not prompt for password\n" |
| " -H --host=[USER@]HOST Operate on remote host\n" |
| " -M --machine=CONTAINER Operate on local container\n" |
| " --transient Only set transient hostname\n" |
| " --static Only set static hostname\n" |
| " --pretty Only set pretty hostname\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_TRANSIENT, |
| ARG_STATIC, |
| ARG_PRETTY |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "transient", no_argument, NULL, ARG_TRANSIENT }, |
| { "static", no_argument, NULL, ARG_STATIC }, |
| { "pretty", no_argument, NULL, ARG_PRETTY }, |
| { "host", required_argument, NULL, 'H' }, |
| { "machine", required_argument, NULL, 'M' }, |
| { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, |
| {} |
| }; |
| |
| int c; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) { |
| |
| switch (c) { |
| |
| case 'h': |
| return help(); |
| |
| case ARG_VERSION: |
| puts(PACKAGE_STRING); |
| puts(SYSTEMD_FEATURES); |
| return 0; |
| |
| case 'H': |
| arg_transport = BUS_TRANSPORT_REMOTE; |
| arg_host = optarg; |
| break; |
| |
| case 'M': |
| arg_transport = BUS_TRANSPORT_CONTAINER; |
| arg_host = optarg; |
| break; |
| |
| case ARG_TRANSIENT: |
| arg_transient = true; |
| break; |
| |
| case ARG_PRETTY: |
| arg_pretty = true; |
| break; |
| |
| case ARG_STATIC: |
| arg_static = true; |
| break; |
| |
| case ARG_NO_ASK_PASSWORD: |
| arg_ask_password = false; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unhandled option"); |
| } |
| } |
| |
| return 1; |
| } |
| |
| static int hostnamectl_main(sd_bus *bus, int argc, char *argv[]) { |
| |
| static const struct { |
| const char* verb; |
| const enum { |
| MORE, |
| LESS, |
| EQUAL |
| } argc_cmp; |
| const int argc; |
| int (* const dispatch)(sd_bus *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); |
| |
| 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."); |
| } |
| |
| return verbs[i].dispatch(bus, argv + optind, left); |
| } |
| |
| int main(int argc, char *argv[]) { |
| _cleanup_bus_unref_ sd_bus *bus = NULL; |
| int r; |
| |
| setlocale(LC_ALL, ""); |
| log_parse_environment(); |
| log_open(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| goto finish; |
| |
| r = bus_open_transport(arg_transport, arg_host, false, &bus); |
| if (r < 0) { |
| log_error("Failed to create bus connection: %s", strerror(-r)); |
| goto finish; |
| } |
| |
| r = hostnamectl_main(bus, argc, argv); |
| |
| finish: |
| return r < 0 ? EXIT_FAILURE : r; |
| } |