diff options
Diffstat (limited to 'src/hostname/hostnamectl.c')
| -rw-r--r-- | src/hostname/hostnamectl.c | 578 |
1 files changed, 578 insertions, 0 deletions
diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c new file mode 100644 index 0000000000..ff1f091776 --- /dev/null +++ b/src/hostname/hostnamectl.c @@ -0,0 +1,578 @@ +/*-*- 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; +} |