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path: root/src/grp-hostname/hostnamectl/hostnamectl.c
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Diffstat (limited to 'src/grp-hostname/hostnamectl/hostnamectl.c')
-rw-r--r--src/grp-hostname/hostnamectl/hostnamectl.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/src/grp-hostname/hostnamectl/hostnamectl.c b/src/grp-hostname/hostnamectl/hostnamectl.c
new file mode 100644
index 0000000000..d6da61879b
--- /dev/null
+++ b/src/grp-hostname/hostnamectl/hostnamectl.c
@@ -0,0 +1,531 @@
+/***
+ 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 <getopt.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-id128.h>
+
+#include "sd-bus/bus-error.h"
+#include "sd-bus/bus-util.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/architecture.h"
+#include "systemd-basic/hostname-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/spawn-polkit-agent.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;
+ char *deployment;
+ char *location;
+ char *kernel_name;
+ char *kernel_release;
+ char *os_pretty_name;
+ char *os_cpe_name;
+ char *virtualization;
+ char *architecture;
+} StatusInfo;
+
+static void print_status_info(StatusInfo *i) {
+ sd_id128_t mid = {}, bid = {};
+ int r;
+
+ 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", i->pretty_hostname);
+
+ if (!isempty(i->hostname) &&
+ !streq_ptr(i->hostname, i->static_hostname))
+ printf("Transient hostname: %s\n", i->hostname);
+
+ if (!isempty(i->icon_name))
+ printf(" Icon name: %s\n",
+ strna(i->icon_name));
+
+ if (!isempty(i->chassis))
+ printf(" Chassis: %s\n",
+ strna(i->chassis));
+
+ if (!isempty(i->deployment))
+ printf(" Deployment: %s\n", i->deployment);
+
+ if (!isempty(i->location))
+ printf(" Location: %s\n", i->location);
+
+ 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 (!isempty(i->virtualization))
+ printf(" Virtualization: %s\n", i->virtualization);
+
+ if (!isempty(i->os_pretty_name))
+ printf(" Operating System: %s\n", i->os_pretty_name);
+
+ if (!isempty(i->os_cpe_name))
+ printf(" CPE OS Name: %s\n", i->os_cpe_name);
+
+ if (!isempty(i->kernel_name) && !isempty(i->kernel_release))
+ printf(" Kernel: %s %s\n", i->kernel_name, i->kernel_release);
+
+ if (!isempty(i->architecture))
+ printf(" Architecture: %s\n", i->architecture);
+
+}
+
+static int show_one_name(sd_bus *bus, const char* attr) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ _cleanup_(sd_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 hostname_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) },
+ { "Deployment", "s", NULL, offsetof(StatusInfo, deployment) },
+ { "Location", "s", NULL, offsetof(StatusInfo, location) },
+ { "KernelName", "s", NULL, offsetof(StatusInfo, kernel_name) },
+ { "KernelRelease", "s", NULL, offsetof(StatusInfo, kernel_release) },
+ { "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name) },
+ { "OperatingSystemCPEName", "s", NULL, offsetof(StatusInfo, os_cpe_name) },
+ {}
+ };
+
+ static const struct bus_properties_map manager_map[] = {
+ { "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) },
+ { "Architecture", "s", NULL, offsetof(StatusInfo, architecture) },
+ {}
+ };
+
+ int r;
+
+ r = bus_map_all_properties(bus,
+ "org.freedesktop.hostname1",
+ "/org/freedesktop/hostname1",
+ hostname_map,
+ &info);
+ if (r < 0)
+ goto fail;
+
+ bus_map_all_properties(bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ manager_map,
+ &info);
+
+ print_status_info(&info);
+
+fail:
+ free(info.hostname);
+ free(info.static_hostname);
+ free(info.pretty_hostname);
+ free(info.icon_name);
+ free(info.chassis);
+ free(info.deployment);
+ free(info.location);
+ free(info.kernel_name);
+ free(info.kernel_release);
+ free(info.os_pretty_name);
+ free(info.os_cpe_name);
+ free(info.virtualization);
+ free(info.architecture);
+
+ return r;
+}
+
+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_(sd_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. */
+ if (arg_static && hostname_is_valid(hostname, true))
+ p = ""; /* No pretty hostname (as it is redundant), just a static one */
+ else
+ p = hostname; /* Use the passed name as pretty hostname */
+
+ r = set_simple_string(bus, "SetPrettyHostname", p);
+ if (r < 0)
+ return r;
+
+ /* Now that we set the pretty hostname, let's clean up the parameter and use that as static
+ * hostname. If the hostname was already valid as static hostname, this will only chop off the trailing
+ * dot if there is one. If it was not valid, then it will be made fully valid by truncating, dropping
+ * multiple dots, and dropping weird chars. Note that we clean the name up only if we also are
+ * supposed to set the pretty name. If the pretty name is not being set we assume the user knows what
+ * he does and pass the name as-is. */
+ h = strdup(hostname);
+ if (!h)
+ return log_oom();
+
+ hostname = hostname_cleanup(h); /* Use the cleaned up name as static hostname */
+ }
+
+ 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 set_deployment(sd_bus *bus, char **args, unsigned n) {
+ assert(args);
+ assert(n == 2);
+
+ return set_simple_string(bus, "SetDeployment", args[1]);
+}
+
+static int set_location(sd_bus *bus, char **args, unsigned n) {
+ assert(args);
+ assert(n == 2);
+
+ return set_simple_string(bus, "SetLocation", args[1]);
+}
+
+static void 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"
+ " set-deployment NAME Set deployment environment for host\n"
+ " set-location NAME Set location for host\n"
+ , program_invocation_short_name);
+}
+
+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':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case 'H':
+ arg_transport = BUS_TRANSPORT_REMOTE;
+ arg_host = optarg;
+ break;
+
+ case 'M':
+ arg_transport = BUS_TRANSPORT_MACHINE;
+ 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 },
+ { "set-deployment", EQUAL, 2, set_deployment },
+ { "set-location", EQUAL, 2, set_location },
+ };
+
+ 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_(sd_bus_flush_close_unrefp) 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_connect_transport(arg_transport, arg_host, false, &bus);
+ if (r < 0) {
+ log_error_errno(r, "Failed to create bus connection: %m");
+ goto finish;
+ }
+
+ r = hostnamectl_main(bus, argc, argv);
+
+finish:
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:35:18 +0000