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Systemd/src/login/loginctl.c
Lennart Poettering c529695e7a logind: open up most bus calls for unpriviliged processes, using PolicyKit 
Also, allow clients to alter their own objects without any further
priviliges. i.e. this allows clients to kill and lock their own sessions
without involving PK.
2015-02-18 12:55:25 +01:00

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 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 <unistd.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <pwd.h>
#include <locale.h>
#include "sd-bus.h"
#include "bus-util.h"
#include "bus-error.h"
#include "log.h"
#include "util.h"
#include "macro.h"
#include "pager.h"
#include "build.h"
#include "strv.h"
#include "unit-name.h"
#include "sysfs-show.h"
#include "logs-show.h"
#include "cgroup-show.h"
#include "cgroup-util.h"
#include "spawn-polkit-agent.h"
#include "verbs.h"
static char **arg_property = NULL;
static bool arg_all = false;
static bool arg_full = false;
static bool arg_no_pager = false;
static bool arg_legend = true;
static const char *arg_kill_who = NULL;
static int arg_signal = SIGTERM;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static char *arg_host = NULL;
static bool arg_ask_password = true;
static unsigned arg_lines = 10;
static OutputMode arg_output = OUTPUT_SHORT;
static void pager_open_if_enabled(void) {
if (arg_no_pager)
return;
pager_open(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();
}
static OutputFlags get_output_flags(void) {
return
arg_all * OUTPUT_SHOW_ALL |
arg_full * OUTPUT_FULL_WIDTH |
(!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
on_tty() * OUTPUT_COLOR;
}
static int list_sessions(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
const char *id, *user, *seat, *object;
sd_bus *bus = userdata;
unsigned k = 0;
uint32_t uid;
int r;
assert(bus);
assert(argv);
pager_open_if_enabled();
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ListSessions",
&error, &reply,
"");
if (r < 0) {
log_error("Failed to list sessions: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_enter_container(reply, 'a', "(susso)");
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("%10s %10s %-16s %-16s\n", "SESSION", "UID", "USER", "SEAT");
while ((r = sd_bus_message_read(reply, "(susso)", &id, &uid, &user, &seat, &object)) > 0) {
printf("%10s %10u %-16s %-16s\n", id, (unsigned) uid, user, seat);
k++;
}
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("\n%u sessions listed.\n", k);
return 0;
}
static int list_users(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
const char *user, *object;
sd_bus *bus = userdata;
unsigned k = 0;
uint32_t uid;
int r;
assert(bus);
assert(argv);
pager_open_if_enabled();
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ListUsers",
&error, &reply,
"");
if (r < 0) {
log_error("Failed to list users: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_enter_container(reply, 'a', "(uso)");
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("%10s %-16s\n", "UID", "USER");
while ((r = sd_bus_message_read(reply, "(uso)", &uid, &user, &object)) > 0) {
printf("%10u %-16s\n", (unsigned) uid, user);
k++;
}
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("\n%u users listed.\n", k);
return 0;
}
static int list_seats(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
const char *seat, *object;
sd_bus *bus = userdata;
unsigned k = 0;
int r;
assert(bus);
assert(argv);
pager_open_if_enabled();
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ListSeats",
&error, &reply,
"");
if (r < 0) {
log_error("Failed to list seats: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_enter_container(reply, 'a', "(so)");
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("%-16s\n", "SEAT");
while ((r = sd_bus_message_read(reply, "(so)", &seat, &object)) > 0) {
printf("%-16s\n", seat);
k++;
}
if (r < 0)
return bus_log_parse_error(r);
if (arg_legend)
printf("\n%u seats listed.\n", k);
return 0;
}
static int show_unit_cgroup(sd_bus *bus, const char *interface, const char *unit, pid_t leader) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_free_ char *path = NULL;
const char *cgroup;
int r;
unsigned c;
assert(bus);
assert(unit);
if (arg_transport != BUS_TRANSPORT_LOCAL)
return 0;
path = unit_dbus_path_from_name(unit);
if (!path)
return -ENOMEM;
r = sd_bus_get_property(
bus,
"org.freedesktop.systemd1",
path,
interface,
"ControlGroup",
&error, &reply, "s");
if (r < 0)
return r;
r = sd_bus_message_read(reply, "s", &cgroup);
if (r < 0)
return r;
if (isempty(cgroup))
return 0;
if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup, false) != 0 && leader <= 0)
return 0;
c = columns();
if (c > 18)
c -= 18;
else
c = 0;
show_cgroup_and_extra(SYSTEMD_CGROUP_CONTROLLER, cgroup, "\t\t ", c, false, &leader, leader > 0, get_output_flags());
return 0;
}
typedef struct SessionStatusInfo {
const char *id;
uid_t uid;
const char *name;
struct dual_timestamp timestamp;
unsigned int vtnr;
const char *seat;
const char *tty;
const char *display;
bool remote;
const char *remote_host;
const char *remote_user;
const char *service;
pid_t leader;
const char *type;
const char *class;
const char *state;
const char *scope;
const char *desktop;
} SessionStatusInfo;
typedef struct UserStatusInfo {
uid_t uid;
const char *name;
struct dual_timestamp timestamp;
const char *state;
char **sessions;
const char *display;
const char *slice;
} UserStatusInfo;
typedef struct SeatStatusInfo {
const char *id;
const char *active_session;
char **sessions;
} SeatStatusInfo;
static int prop_map_first_of_struct(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
const char *contents;
int r;
r = sd_bus_message_peek_type(m, NULL, &contents);
if (r < 0)
return r;
r = sd_bus_message_enter_container(m, SD_BUS_TYPE_STRUCT, contents);
if (r < 0)
return r;
if (contents[0] == 's' || contents[0] == 'o') {
const char *s;
char **p = (char **) userdata;
r = sd_bus_message_read_basic(m, contents[0], &s);
if (r < 0)
return r;
free(*p);
*p = strdup(s);
if (!*p)
return -ENOMEM;
} else {
r = sd_bus_message_read_basic(m, contents[0], userdata);
if (r < 0)
return r;
}
r = sd_bus_message_skip(m, contents+1);
if (r < 0)
return r;
r = sd_bus_message_exit_container(m);
if (r < 0)
return r;
return 0;
}
static int prop_map_sessions_strv(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
const char *name;
int r;
assert(bus);
assert(m);
r = sd_bus_message_enter_container(m, 'a', "(so)");
if (r < 0)
return r;
while ((r = sd_bus_message_read(m, "(so)", &name, NULL)) > 0) {
r = strv_extend(userdata, name);
if (r < 0)
return r;
}
if (r < 0)
return r;
return sd_bus_message_exit_container(m);
}
static int print_session_status_info(sd_bus *bus, const char *path, bool *new_line) {
static const struct bus_properties_map map[] = {
{ "Id", "s", NULL, offsetof(SessionStatusInfo, id) },
{ "Name", "s", NULL, offsetof(SessionStatusInfo, name) },
{ "TTY", "s", NULL, offsetof(SessionStatusInfo, tty) },
{ "Display", "s", NULL, offsetof(SessionStatusInfo, display) },
{ "RemoteHost", "s", NULL, offsetof(SessionStatusInfo, remote_host) },
{ "RemoteUser", "s", NULL, offsetof(SessionStatusInfo, remote_user) },
{ "Service", "s", NULL, offsetof(SessionStatusInfo, service) },
{ "Desktop", "s", NULL, offsetof(SessionStatusInfo, desktop) },
{ "Type", "s", NULL, offsetof(SessionStatusInfo, type) },
{ "Class", "s", NULL, offsetof(SessionStatusInfo, class) },
{ "Scope", "s", NULL, offsetof(SessionStatusInfo, scope) },
{ "State", "s", NULL, offsetof(SessionStatusInfo, state) },
{ "VTNr", "u", NULL, offsetof(SessionStatusInfo, vtnr) },
{ "Leader", "u", NULL, offsetof(SessionStatusInfo, leader) },
{ "Remote", "b", NULL, offsetof(SessionStatusInfo, remote) },
{ "Timestamp", "t", NULL, offsetof(SessionStatusInfo, timestamp.realtime) },
{ "TimestampMonotonic", "t", NULL, offsetof(SessionStatusInfo, timestamp.monotonic) },
{ "User", "(uo)", prop_map_first_of_struct, offsetof(SessionStatusInfo, uid) },
{ "Seat", "(so)", prop_map_first_of_struct, offsetof(SessionStatusInfo, seat) },
{}
};
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char since2[FORMAT_TIMESTAMP_MAX], *s2;
SessionStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
if (r < 0)
return log_error_errno(r, "Could not get properties: %m");
if (*new_line)
printf("\n");
*new_line = true;
printf("%s - ", strna(i.id));
if (i.name)
printf("%s (%u)\n", i.name, (unsigned) i.uid);
else
printf("%u\n", (unsigned) i.uid);
s1 = format_timestamp_relative(since1, sizeof(since1), i.timestamp.realtime);
s2 = format_timestamp(since2, sizeof(since2), i.timestamp.realtime);
if (s1)
printf("\t Since: %s; %s\n", s2, s1);
else if (s2)
printf("\t Since: %s\n", s2);
if (i.leader > 0) {
_cleanup_free_ char *t = NULL;
printf("\t Leader: %u", (unsigned) i.leader);
get_process_comm(i.leader, &t);
if (t)
printf(" (%s)", t);
printf("\n");
}
if (!isempty(i.seat)) {
printf("\t Seat: %s", i.seat);
if (i.vtnr > 0)
printf("; vc%u", i.vtnr);
printf("\n");
}
if (i.tty)
printf("\t TTY: %s\n", i.tty);
else if (i.display)
printf("\t Display: %s\n", i.display);
if (i.remote_host && i.remote_user)
printf("\t Remote: %s@%s\n", i.remote_user, i.remote_host);
else if (i.remote_host)
printf("\t Remote: %s\n", i.remote_host);
else if (i.remote_user)
printf("\t Remote: user %s\n", i.remote_user);
else if (i.remote)
printf("\t Remote: Yes\n");
if (i.service) {
printf("\t Service: %s", i.service);
if (i.type)
printf("; type %s", i.type);
if (i.class)
printf("; class %s", i.class);
printf("\n");
} else if (i.type) {
printf("\t Type: %s", i.type);
if (i.class)
printf("; class %s", i.class);
printf("\n");
} else if (i.class)
printf("\t Class: %s\n", i.class);
if (!isempty(i.desktop))
printf("\t Desktop: %s\n", i.desktop);
if (i.state)
printf("\t State: %s\n", i.state);
if (i.scope) {
printf("\t Unit: %s\n", i.scope);
show_unit_cgroup(bus, "org.freedesktop.systemd1.Scope", i.scope, i.leader);
if (arg_transport == BUS_TRANSPORT_LOCAL) {
show_journal_by_unit(
stdout,
i.scope,
arg_output,
0,
i.timestamp.monotonic,
arg_lines,
0,
get_output_flags() | OUTPUT_BEGIN_NEWLINE,
SD_JOURNAL_LOCAL_ONLY,
true,
NULL);
}
}
return 0;
}
static int print_user_status_info(sd_bus *bus, const char *path, bool *new_line) {
static const struct bus_properties_map map[] = {
{ "Name", "s", NULL, offsetof(UserStatusInfo, name) },
{ "Slice", "s", NULL, offsetof(UserStatusInfo, slice) },
{ "State", "s", NULL, offsetof(UserStatusInfo, state) },
{ "UID", "u", NULL, offsetof(UserStatusInfo, uid) },
{ "Timestamp", "t", NULL, offsetof(UserStatusInfo, timestamp.realtime) },
{ "TimestampMonotonic", "t", NULL, offsetof(UserStatusInfo, timestamp.monotonic) },
{ "Display", "(so)", prop_map_first_of_struct, offsetof(UserStatusInfo, display) },
{ "Sessions", "a(so)", prop_map_sessions_strv, offsetof(UserStatusInfo, sessions) },
{}
};
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char since2[FORMAT_TIMESTAMP_MAX], *s2;
UserStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
if (r < 0) {
log_error_errno(r, "Could not get properties: %m");
goto finish;
}
if (*new_line)
printf("\n");
*new_line = true;
if (i.name)
printf("%s (%u)\n", i.name, (unsigned) i.uid);
else
printf("%u\n", (unsigned) i.uid);
s1 = format_timestamp_relative(since1, sizeof(since1), i.timestamp.realtime);
s2 = format_timestamp(since2, sizeof(since2), i.timestamp.realtime);
if (s1)
printf("\t Since: %s; %s\n", s2, s1);
else if (s2)
printf("\t Since: %s\n", s2);
if (!isempty(i.state))
printf("\t State: %s\n", i.state);
if (!strv_isempty(i.sessions)) {
char **l;
printf("\tSessions:");
STRV_FOREACH(l, i.sessions) {
if (streq_ptr(*l, i.display))
printf(" *%s", *l);
else
printf(" %s", *l);
}
printf("\n");
}
if (i.slice) {
printf("\t Unit: %s\n", i.slice);
show_unit_cgroup(bus, "org.freedesktop.systemd1.Slice", i.slice, 0);
show_journal_by_unit(
stdout,
i.slice,
arg_output,
0,
i.timestamp.monotonic,
arg_lines,
0,
get_output_flags() | OUTPUT_BEGIN_NEWLINE,
SD_JOURNAL_LOCAL_ONLY,
true,
NULL);
}
finish:
strv_free(i.sessions);
return r;
}
static int print_seat_status_info(sd_bus *bus, const char *path, bool *new_line) {
static const struct bus_properties_map map[] = {
{ "Id", "s", NULL, offsetof(SeatStatusInfo, id) },
{ "ActiveSession", "(so)", prop_map_first_of_struct, offsetof(SeatStatusInfo, active_session) },
{ "Sessions", "a(so)", prop_map_sessions_strv, offsetof(SeatStatusInfo, sessions) },
{}
};
SeatStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
if (r < 0) {
log_error_errno(r, "Could not get properties: %m");
goto finish;
}
if (*new_line)
printf("\n");
*new_line = true;
printf("%s\n", strna(i.id));
if (!strv_isempty(i.sessions)) {
char **l;
printf("\tSessions:");
STRV_FOREACH(l, i.sessions) {
if (streq_ptr(*l, i.active_session))
printf(" *%s", *l);
else
printf(" %s", *l);
}
printf("\n");
}
if (arg_transport == BUS_TRANSPORT_LOCAL) {
unsigned c;
c = columns();
if (c > 21)
c -= 21;
else
c = 0;
printf("\t Devices:\n");
show_sysfs(i.id, "\t\t ", c);
}
finish:
strv_free(i.sessions);
return r;
}
static int show_properties(sd_bus *bus, const char *path, bool *new_line) {
int r;
if (*new_line)
printf("\n");
*new_line = true;
r = bus_print_all_properties(bus, "org.freedesktop.login1", path, arg_property, arg_all);
if (r < 0)
log_error_errno(r, "Could not get properties: %m");
return r;
}
static int show_session(int argc, char *argv[], void *userdata) {
bool properties, new_line = false;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
properties = !strstr(argv[0], "status");
pager_open_if_enabled();
if (argc <= 1) {
/* If not argument is specified inspect the manager
* itself */
if (properties)
return show_properties(bus, "/org/freedesktop/login1", &new_line);
/* And in the pretty case, show data of the calling session */
return print_session_status_info(bus, "/org/freedesktop/login1/session/self", &new_line);
}
for (i = 1; i < argc; i++) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message * reply = NULL;
const char *path = NULL;
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"GetSession",
&error, &reply,
"s", argv[i]);
if (r < 0) {
log_error("Failed to get session: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_read(reply, "o", &path);
if (r < 0)
return bus_log_parse_error(r);
if (properties)
r = show_properties(bus, path, &new_line);
else
r = print_session_status_info(bus, path, &new_line);
if (r < 0)
return r;
}
return 0;
}
static int show_user(int argc, char *argv[], void *userdata) {
bool properties, new_line = false;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
properties = !strstr(argv[0], "status");
pager_open_if_enabled();
if (argc <= 1) {
/* If not argument is specified inspect the manager
* itself */
if (properties)
return show_properties(bus, "/org/freedesktop/login1", &new_line);
return print_user_status_info(bus, "/org/freedesktop/login1/user/self", &new_line);
}
for (i = 1; i < argc; i++) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message * reply = NULL;
const char *path = NULL;
uid_t uid;
r = get_user_creds((const char**) (argv+i), &uid, NULL, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to look up user %s: %m", argv[i]);
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"GetUser",
&error, &reply,
"u", (uint32_t) uid);
if (r < 0) {
log_error("Failed to get user: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_read(reply, "o", &path);
if (r < 0)
return bus_log_parse_error(r);
if (properties)
r = show_properties(bus, path, &new_line);
else
r = print_user_status_info(bus, path, &new_line);
if (r < 0)
return r;
}
return 0;
}
static int show_seat(int argc, char *argv[], void *userdata) {
bool properties, new_line = false;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
properties = !strstr(argv[0], "status");
pager_open_if_enabled();
if (argc <= 1) {
/* If not argument is specified inspect the manager
* itself */
if (properties)
return show_properties(bus, "/org/freedesktop/login1", &new_line);
return print_seat_status_info(bus, "/org/freedesktop/login1/seat/self", &new_line);
}
for (i = 1; i < argc; i++) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message * reply = NULL;
const char *path = NULL;
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"GetSeat",
&error, &reply,
"s", argv[i]);
if (r < 0) {
log_error("Failed to get seat: %s", bus_error_message(&error, r));
return r;
}
r = sd_bus_message_read(reply, "o", &path);
if (r < 0)
return bus_log_parse_error(r);
if (properties)
r = show_properties(bus, path, &new_line);
else
r = print_seat_status_info(bus, path, &new_line);
if (r < 0)
return r;
}
return 0;
}
static int activate(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
char *short_argv[3];
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
if (argc < 2) {
/* No argument? Let's convert this into the empty
* session name, which the calls will then resolve to
* the caller's session. */
short_argv[0] = argv[0];
short_argv[1] = (char*) "";
short_argv[2] = NULL;
argv = short_argv;
argc = 2;
}
for (i = 1; i < argc; i++) {
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
streq(argv[0], "lock-session") ? "LockSession" :
streq(argv[0], "unlock-session") ? "UnlockSession" :
streq(argv[0], "terminate-session") ? "TerminateSession" :
"ActivateSession",
&error, NULL,
"s", argv[i]);
if (r < 0) {
log_error("Failed to issue method call: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int kill_session(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
if (!arg_kill_who)
arg_kill_who = "all";
for (i = 1; i < argc; i++) {
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"KillSession",
&error, NULL,
"ssi", argv[i], arg_kill_who, arg_signal);
if (r < 0) {
log_error("Could not kill session: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int enable_linger(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
char* short_argv[3];
bool b;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
b = streq(argv[0], "enable-linger");
if (argc < 2) {
short_argv[0] = argv[0];
short_argv[1] = (char*) "";
short_argv[2] = NULL;
argv = short_argv;
argc = 2;
}
for (i = 1; i < argc; i++) {
uid_t uid;
if (isempty(argv[i]))
uid = UID_INVALID;
else {
r = get_user_creds((const char**) (argv+i), &uid, NULL, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to look up user %s: %m", argv[i]);
}
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"SetUserLinger",
&error, NULL,
"ubb", (uint32_t) uid, b, true);
if (r < 0) {
log_error("Could not enable linger: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int terminate_user(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
for (i = 1; i < argc; i++) {
uid_t uid;
r = get_user_creds((const char**) (argv+i), &uid, NULL, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to look up user %s: %m", argv[i]);
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"TerminateUser",
&error, NULL,
"u", (uint32_t) uid);
if (r < 0) {
log_error("Could not terminate user: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int kill_user(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
if (!arg_kill_who)
arg_kill_who = "all";
for (i = 1; i < argc; i++) {
uid_t uid;
r = get_user_creds((const char**) (argv+i), &uid, NULL, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to look up user %s: %m", argv[i]);
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"KillUser",
&error, NULL,
"ui", (uint32_t) uid, arg_signal);
if (r < 0) {
log_error("Could not kill user: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int attach(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
for (i = 2; i < argc; i++) {
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"AttachDevice",
&error, NULL,
"ssb", argv[1], argv[i], true);
if (r < 0) {
log_error("Could not attach device: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int flush_devices(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"FlushDevices",
&error, NULL,
"b", true);
if (r < 0)
log_error("Could not flush devices: %s", bus_error_message(&error, -r));
return r;
}
static int lock_sessions(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
streq(argv[0], "lock-sessions") ? "LockSessions" : "UnlockSessions",
&error, NULL,
NULL);
if (r < 0)
log_error("Could not lock sessions: %s", bus_error_message(&error, -r));
return r;
}
static int terminate_seat(int argc, char *argv[], void *userdata) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus *bus = userdata;
int r, i;
assert(bus);
assert(argv);
polkit_agent_open_if_enabled();
for (i = 1; i < argc; i++) {
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"TerminateSeat",
&error, NULL,
"s", argv[i]);
if (r < 0) {
log_error("Could not terminate seat: %s", bus_error_message(&error, -r));
return r;
}
}
return 0;
}
static int help(int argc, char *argv[], void *userdata) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Send control commands to or query the login manager.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" --no-legend Do not show the headers and footers\n"
" --no-ask-password Don't prompt for password\n"
" -H --host=[USER@]HOST Operate on remote host\n"
" -M --machine=CONTAINER Operate on local container\n"
" -p --property=NAME Show only properties by this name\n"
" -a --all Show all properties, including empty ones\n"
" -l --full Do not ellipsize output\n"
" --kill-who=WHO Who to send signal to\n"
" -s --signal=SIGNAL Which signal to send\n"
" -n --lines=INTEGER Number of journal entries to show\n"
" -o --output=STRING Change journal output mode (short, short-monotonic,\n"
" verbose, export, json, json-pretty, json-sse, cat)\n\n"
"Session Commands:\n"
" list-sessions List sessions\n"
" session-status [ID...] Show session status\n"
" show-session [ID...] Show properties of sessions or the manager\n"
" activate [ID] Activate a session\n"
" lock-session [ID...] Screen lock one or more sessions\n"
" unlock-session [ID...] Screen unlock one or more sessions\n"
" lock-sessions Screen lock all current sessions\n"
" unlock-sessions Screen unlock all current sessions\n"
" terminate-session ID... Terminate one or more sessions\n"
" kill-session ID... Send signal to processes of a session\n\n"
"User Commands:\n"
" list-users List users\n"
" user-status [USER...] Show user status\n"
" show-user [USER...] Show properties of users or the manager\n"
" enable-linger [USER...] Enable linger state of one or more users\n"
" disable-linger [USER...] Disable linger state of one or more users\n"
" terminate-user USER... Terminate all sessions of one or more users\n"
" kill-user USER... Send signal to processes of a user\n\n"
"Seat Commands:\n"
" list-seats List seats\n"
" seat-status [NAME...] Show seat status\n"
" show-seat [NAME...] Show properties of seats or the manager\n"
" attach NAME DEVICE... Attach one or more devices to a seat\n"
" flush-devices Flush all device associations\n"
" terminate-seat NAME... Terminate all sessions on one or more seats\n"
, program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_NO_PAGER,
ARG_NO_LEGEND,
ARG_KILL_WHO,
ARG_NO_ASK_PASSWORD,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "property", required_argument, NULL, 'p' },
{ "all", no_argument, NULL, 'a' },
{ "full", no_argument, NULL, 'l' },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "kill-who", required_argument, NULL, ARG_KILL_WHO },
{ "signal", required_argument, NULL, 's' },
{ "host", required_argument, NULL, 'H' },
{ "machine", required_argument, NULL, 'M' },
{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
{ "lines", required_argument, NULL, 'n' },
{ "output", required_argument, NULL, 'o' },
{}
};
int c, r;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hp:als:H:M:n:o:", options, NULL)) >= 0)
switch (c) {
case 'h':
help(0, NULL, NULL);
return 0;
case ARG_VERSION:
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
case 'p': {
r = strv_extend(&arg_property, optarg);
if (r < 0)
return log_oom();
/* If the user asked for a particular
* property, show it to him, even if it is
* empty. */
arg_all = true;
break;
}
case 'a':
arg_all = true;
break;
case 'l':
arg_full = true;
break;
case 'n':
if (safe_atou(optarg, &arg_lines) < 0) {
log_error("Failed to parse lines '%s'", optarg);
return -EINVAL;
}
break;
case 'o':
arg_output = output_mode_from_string(optarg);
if (arg_output < 0) {
log_error("Unknown output '%s'.", optarg);
return -EINVAL;
}
break;
case ARG_NO_PAGER:
arg_no_pager = true;
break;
case ARG_NO_LEGEND:
arg_legend = false;
break;
case ARG_NO_ASK_PASSWORD:
arg_ask_password = false;
break;
case ARG_KILL_WHO:
arg_kill_who = optarg;
break;
case 's':
arg_signal = signal_from_string_try_harder(optarg);
if (arg_signal < 0) {
log_error("Failed to parse signal string %s.", optarg);
return -EINVAL;
}
break;
case 'H':
arg_transport = BUS_TRANSPORT_REMOTE;
arg_host = optarg;
break;
case 'M':
arg_transport = BUS_TRANSPORT_MACHINE;
arg_host = optarg;
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
return 1;
}
static int loginctl_main(int argc, char *argv[], sd_bus *bus) {
static const Verb verbs[] = {
{ "help", VERB_ANY, VERB_ANY, 0, help },
{ "list-sessions", VERB_ANY, 1, VERB_DEFAULT, list_sessions },
{ "session-status", VERB_ANY, VERB_ANY, 0, show_session },
{ "show-session", VERB_ANY, VERB_ANY, 0, show_session },
{ "activate", VERB_ANY, 2, 0, activate },
{ "lock-session", VERB_ANY, VERB_ANY, 0, activate },
{ "unlock-session", VERB_ANY, VERB_ANY, 0, activate },
{ "lock-sessions", VERB_ANY, 1, 0, lock_sessions },
{ "unlock-sessions", VERB_ANY, 1, 0, lock_sessions },
{ "terminate-session", 2, VERB_ANY, 0, activate },
{ "kill-session", 2, VERB_ANY, 0, kill_session },
{ "list-users", VERB_ANY, 1, 0, list_users },
{ "user-status", VERB_ANY, VERB_ANY, 0, show_user },
{ "show-user", VERB_ANY, VERB_ANY, 0, show_user },
{ "enable-linger", VERB_ANY, VERB_ANY, 0, enable_linger },
{ "disable-linger", VERB_ANY, VERB_ANY, 0, enable_linger },
{ "terminate-user", 2, VERB_ANY, 0, terminate_user },
{ "kill-user", 2, VERB_ANY, 0, kill_user },
{ "list-seats", VERB_ANY, 1, 0, list_seats },
{ "seat-status", VERB_ANY, VERB_ANY, 0, show_seat },
{ "show-seat", VERB_ANY, VERB_ANY, 0, show_seat },
{ "attach", 3, VERB_ANY, 0, attach },
{ "flush-devices", VERB_ANY, 1, 0, flush_devices },
{ "terminate-seat", 2, VERB_ANY, 0, terminate_seat },
{}
};
return dispatch_verb(argc, argv, verbs, bus);
}
int main(int argc, char *argv[]) {
_cleanup_bus_close_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_errno(r, "Failed to create bus connection: %m");
goto finish;
}
sd_bus_set_allow_interactive_authorization(bus, arg_ask_password);
r = loginctl_main(argc, argv, bus);
finish:
pager_close();
polkit_agent_close();
strv_free(arg_property);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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