52ef5dd798
Let's clean up hostname_is_valid() a bit: let's turn the second boolean argument into a more explanatory flags field, and add a flag that accepts the special name ".host" as valid. This is useful for the container logic, where the special hostname ".host" refers to the "root container", i.e. the host system itself, and can be specified at various places. let's also get rid of machine_name_is_valid(). It was just an alias, which is confusing and even more so now that we have the flags param.
452 lines
16 KiB
C
452 lines
16 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <getopt.h>
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#include <locale.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sd-bus.h"
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#include "sd-id128.h"
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#include "alloc-util.h"
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#include "architecture.h"
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#include "bus-error.h"
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#include "bus-map-properties.h"
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#include "hostname-util.h"
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#include "main-func.h"
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#include "pretty-print.h"
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#include "spawn-polkit-agent.h"
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#include "terminal-util.h"
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#include "util.h"
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#include "verbs.h"
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static bool arg_ask_password = true;
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static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
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static char *arg_host = NULL;
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static bool arg_transient = false;
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static bool arg_pretty = false;
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static bool arg_static = false;
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typedef struct StatusInfo {
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const char *hostname;
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const char *static_hostname;
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const char *pretty_hostname;
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const char *icon_name;
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const char *chassis;
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const char *deployment;
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const char *location;
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const char *kernel_name;
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const char *kernel_release;
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const char *os_pretty_name;
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const char *os_cpe_name;
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const char *virtualization;
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const char *architecture;
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const char *home_url;
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} StatusInfo;
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static void print_status_info(StatusInfo *i) {
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sd_id128_t mid = {}, bid = {};
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int r;
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assert(i);
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printf(" Static hostname: %s\n", strna(i->static_hostname));
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if (!isempty(i->pretty_hostname) &&
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!streq_ptr(i->pretty_hostname, i->static_hostname))
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printf(" Pretty hostname: %s\n", i->pretty_hostname);
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if (!isempty(i->hostname) &&
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!streq_ptr(i->hostname, i->static_hostname))
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printf("Transient hostname: %s\n", i->hostname);
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if (!isempty(i->icon_name))
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printf(" Icon name: %s\n",
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strna(i->icon_name));
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if (!isempty(i->chassis))
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printf(" Chassis: %s\n",
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strna(i->chassis));
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if (!isempty(i->deployment))
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printf(" Deployment: %s\n", i->deployment);
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if (!isempty(i->location))
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printf(" Location: %s\n", i->location);
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r = sd_id128_get_machine(&mid);
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if (r >= 0)
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printf(" Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(mid));
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r = sd_id128_get_boot(&bid);
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if (r >= 0)
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printf(" Boot ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(bid));
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if (!isempty(i->virtualization))
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printf(" Virtualization: %s\n", i->virtualization);
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if (!isempty(i->os_pretty_name)) {
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_cleanup_free_ char *formatted = NULL;
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const char *t = i->os_pretty_name;
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if (i->home_url) {
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if (terminal_urlify(i->home_url, i->os_pretty_name, &formatted) >= 0)
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t = formatted;
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}
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printf(" Operating System: %s\n", t);
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}
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if (!isempty(i->os_cpe_name))
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printf(" CPE OS Name: %s\n", i->os_cpe_name);
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if (!isempty(i->kernel_name) && !isempty(i->kernel_release))
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printf(" Kernel: %s %s\n", i->kernel_name, i->kernel_release);
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if (!isempty(i->architecture))
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printf(" Architecture: %s\n", i->architecture);
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}
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static int show_one_name(sd_bus *bus, const char* attr) {
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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const char *s;
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int r;
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r = sd_bus_get_property(
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bus,
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"org.freedesktop.hostname1",
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"/org/freedesktop/hostname1",
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"org.freedesktop.hostname1",
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attr,
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&error, &reply, "s");
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if (r < 0)
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return log_error_errno(r, "Could not get property: %s", bus_error_message(&error, r));
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r = sd_bus_message_read(reply, "s", &s);
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if (r < 0)
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return bus_log_parse_error(r);
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printf("%s\n", s);
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return 0;
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}
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static int show_all_names(sd_bus *bus, sd_bus_error *error) {
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StatusInfo info = {};
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static const struct bus_properties_map hostname_map[] = {
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{ "Hostname", "s", NULL, offsetof(StatusInfo, hostname) },
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{ "StaticHostname", "s", NULL, offsetof(StatusInfo, static_hostname) },
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{ "PrettyHostname", "s", NULL, offsetof(StatusInfo, pretty_hostname) },
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{ "IconName", "s", NULL, offsetof(StatusInfo, icon_name) },
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{ "Chassis", "s", NULL, offsetof(StatusInfo, chassis) },
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{ "Deployment", "s", NULL, offsetof(StatusInfo, deployment) },
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{ "Location", "s", NULL, offsetof(StatusInfo, location) },
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{ "KernelName", "s", NULL, offsetof(StatusInfo, kernel_name) },
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{ "KernelRelease", "s", NULL, offsetof(StatusInfo, kernel_release) },
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{ "OperatingSystemPrettyName", "s", NULL, offsetof(StatusInfo, os_pretty_name) },
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{ "OperatingSystemCPEName", "s", NULL, offsetof(StatusInfo, os_cpe_name) },
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{ "HomeURL", "s", NULL, offsetof(StatusInfo, home_url) },
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{}
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};
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static const struct bus_properties_map manager_map[] = {
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{ "Virtualization", "s", NULL, offsetof(StatusInfo, virtualization) },
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{ "Architecture", "s", NULL, offsetof(StatusInfo, architecture) },
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{}
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};
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_cleanup_(sd_bus_message_unrefp) sd_bus_message *host_message = NULL, *manager_message = NULL;
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int r;
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r = bus_map_all_properties(bus,
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"org.freedesktop.hostname1",
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"/org/freedesktop/hostname1",
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hostname_map,
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0,
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error,
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&host_message,
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&info);
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if (r < 0)
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return r;
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r = bus_map_all_properties(bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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manager_map,
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0,
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error,
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&manager_message,
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&info);
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print_status_info(&info);
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return r;
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}
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static int show_status(int argc, char **argv, void *userdata) {
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sd_bus *bus = userdata;
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int r;
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if (arg_pretty || arg_static || arg_transient) {
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const char *attr;
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if (!!arg_static + !!arg_pretty + !!arg_transient > 1)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Cannot query more than one name type at a time");
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attr = arg_pretty ? "PrettyHostname" :
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arg_static ? "StaticHostname" : "Hostname";
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return show_one_name(bus, attr);
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} else {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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r = show_all_names(bus, &error);
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if (r < 0)
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return log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r));
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return 0;
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}
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}
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static int set_simple_string(sd_bus *bus, const char *method, const char *value) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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int r = 0;
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polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
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r = sd_bus_call_method(
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bus,
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"org.freedesktop.hostname1",
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"/org/freedesktop/hostname1",
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"org.freedesktop.hostname1",
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method,
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&error, NULL,
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"sb", value, arg_ask_password);
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if (r < 0)
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return log_error_errno(r, "Could not set property: %s", bus_error_message(&error, r));
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return 0;
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}
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static int set_hostname(int argc, char **argv, void *userdata) {
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_cleanup_free_ char *h = NULL;
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const char *hostname = argv[1];
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sd_bus *bus = userdata;
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int r;
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if (!arg_pretty && !arg_static && !arg_transient)
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arg_pretty = arg_static = arg_transient = true;
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if (arg_pretty) {
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const char *p;
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/* If the passed hostname is already valid, then assume the user doesn't know anything about pretty
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* hostnames, so let's unset the pretty hostname, and just set the passed hostname as static/dynamic
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* hostname. */
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if (arg_static && hostname_is_valid(hostname, VALID_HOSTNAME_TRAILING_DOT))
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p = ""; /* No pretty hostname (as it is redundant), just a static one */
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else
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p = hostname; /* Use the passed name as pretty hostname */
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r = set_simple_string(bus, "SetPrettyHostname", p);
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if (r < 0)
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return r;
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/* Now that we set the pretty hostname, let's clean up the parameter and use that as static
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* hostname. If the hostname was already valid as static hostname, this will only chop off the trailing
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* dot if there is one. If it was not valid, then it will be made fully valid by truncating, dropping
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* multiple dots, and dropping weird chars. Note that we clean the name up only if we also are
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* supposed to set the pretty name. If the pretty name is not being set we assume the user knows what
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* he does and pass the name as-is. */
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h = strdup(hostname);
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if (!h)
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return log_oom();
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hostname = hostname_cleanup(h); /* Use the cleaned up name as static hostname */
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}
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if (arg_static) {
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r = set_simple_string(bus, "SetStaticHostname", hostname);
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if (r < 0)
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return r;
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}
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if (arg_transient) {
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r = set_simple_string(bus, "SetHostname", hostname);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static int set_icon_name(int argc, char **argv, void *userdata) {
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return set_simple_string(userdata, "SetIconName", argv[1]);
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}
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static int set_chassis(int argc, char **argv, void *userdata) {
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return set_simple_string(userdata, "SetChassis", argv[1]);
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}
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static int set_deployment(int argc, char **argv, void *userdata) {
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return set_simple_string(userdata, "SetDeployment", argv[1]);
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}
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static int set_location(int argc, char **argv, void *userdata) {
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return set_simple_string(userdata, "SetLocation", argv[1]);
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}
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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r = terminal_urlify_man("hostnamectl", "1", &link);
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if (r < 0)
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return log_oom();
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printf("%s [OPTIONS...] COMMAND ...\n\n"
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"%sQuery or change system hostname.%s\n"
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"\nCommands:\n"
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" status Show current hostname settings\n"
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" set-hostname NAME Set system hostname\n"
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" set-icon-name NAME Set icon name for host\n"
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" set-chassis NAME Set chassis type for host\n"
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" set-deployment NAME Set deployment environment for host\n"
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" set-location NAME Set location for host\n"
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"\nOptions:\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --no-ask-password Do not prompt for password\n"
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" -H --host=[USER@]HOST Operate on remote host\n"
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" -M --machine=CONTAINER Operate on local container\n"
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" --transient Only set transient hostname\n"
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" --static Only set static hostname\n"
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" --pretty Only set pretty hostname\n"
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"\nSee the %s for details.\n"
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, program_invocation_short_name
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, ansi_highlight()
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, ansi_normal()
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, link
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);
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return 0;
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}
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static int verb_help(int argc, char **argv, void *userdata) {
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return help();
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_NO_ASK_PASSWORD,
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ARG_TRANSIENT,
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ARG_STATIC,
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ARG_PRETTY
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "transient", no_argument, NULL, ARG_TRANSIENT },
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{ "static", no_argument, NULL, ARG_STATIC },
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{ "pretty", no_argument, NULL, ARG_PRETTY },
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{ "host", required_argument, NULL, 'H' },
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{ "machine", required_argument, NULL, 'M' },
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{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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return help();
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case ARG_VERSION:
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return version();
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case 'H':
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arg_transport = BUS_TRANSPORT_REMOTE;
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arg_host = optarg;
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break;
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case 'M':
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arg_transport = BUS_TRANSPORT_MACHINE;
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arg_host = optarg;
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break;
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case ARG_TRANSIENT:
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arg_transient = true;
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break;
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case ARG_PRETTY:
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arg_pretty = true;
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break;
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case ARG_STATIC:
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arg_static = true;
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break;
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case ARG_NO_ASK_PASSWORD:
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arg_ask_password = false;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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return 1;
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}
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static int hostnamectl_main(sd_bus *bus, int argc, char *argv[]) {
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static const Verb verbs[] = {
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{ "status", VERB_ANY, 1, VERB_DEFAULT, show_status },
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{ "set-hostname", 2, 2, 0, set_hostname },
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{ "set-icon-name", 2, 2, 0, set_icon_name },
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{ "set-chassis", 2, 2, 0, set_chassis },
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{ "set-deployment", 2, 2, 0, set_deployment },
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{ "set-location", 2, 2, 0, set_location },
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{ "help", VERB_ANY, VERB_ANY, 0, verb_help }, /* Not documented, but supported since it is created. */
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{}
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};
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return dispatch_verb(argc, argv, verbs, bus);
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}
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static int run(int argc, char *argv[]) {
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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int r;
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setlocale(LC_ALL, "");
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log_setup_cli();
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r;
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r = bus_connect_transport(arg_transport, arg_host, false, &bus);
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if (r < 0)
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return bus_log_connect_error(r);
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return hostnamectl_main(bus, argc, argv);
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}
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DEFINE_MAIN_FUNCTION(run);
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