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logind: add shutdown/suspend/idle inhibition framework

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This commit is contained in:
Lennart Poettering 2012-04-16 16:47:33 +02:00
parent 9156e799a2
commit f8e2fb7b14
16 changed files with 1087 additions and 122 deletions
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1
.gitignore vendored
View File

@ -10,6 +10,7 @@
/test-id128
/test-journal
/test-install
/test-inhibit
/org.freedesktop.hostname1.xml
/org.freedesktop.locale1.xml
/test-login

16
Makefile.am
View File

@ -2577,6 +2577,8 @@ systemd_logind_SOURCES = \
src/login/logind-session.h \
src/login/logind-user.c \
src/login/logind-user.h \
src/login/logind-inhibit.c \
src/login/logind-inhibit.h \
src/login/logind-session-dbus.c \
src/login/logind-seat-dbus.c \
src/login/logind-user-dbus.c \
@ -2638,8 +2640,20 @@ test_login_LDADD = \
libsystemd-login.la \
libsystemd-shared.la
test_inhibit_SOURCES = \
src/login/test-inhibit.c
test_inhibit_LDADD = \
libsystemd-shared.la \
libsystemd-dbus.la
test_inhibit_CFLAGS = \
$(AM_CFLAGS) \
$(DBUS_CFLAGS)
noinst_PROGRAMS += \
test-login
test-login \
test-inhibit
libsystemd_login_la_SOURCES = \
src/login/sd-login.c

4
TODO
View File

@ -15,7 +15,9 @@ Bugfixes:
Features:
* cg_create_and_attach() should fail for non-available controllers
* filter default cgroups in logind too
* remove empty cgroups from cgls output
* udev: remove /sys and /dev configurability

320
src/login/logind-dbus.c
View File

@ -140,6 +140,15 @@
" <method name=\"CanReboot\">\n" \
" <arg name=\"result\" type=\"s\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"Inhibit\">\n" \
" <arg name=\"what\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"who\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"why\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ListInhibitors\">\n" \
" <arg name=\"inhibitors\" type=\"a(sssuu)\" direction=\"out\"/>\n" \
" </method>\n" \
" <signal name=\"SessionNew\">\n" \
" <arg name=\"id\" type=\"s\"/>\n" \
" <arg name=\"path\" type=\"o\"/>\n" \
@ -174,6 +183,7 @@
" <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \
" <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
" <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
" <property name=\"Inhibited\" type=\"s\" access=\"read\"/>\n" \
" </interface>\n"
#define INTROSPECTION_BEGIN \
@ -224,6 +234,20 @@ static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *pr
return 0;
}
static int bus_manager_append_inhibited(DBusMessageIter *i, const char *property, void *data) {
Manager *m = data;
InhibitWhat w;
const char *p;
w = manager_inhibit_what(m);
p = inhibit_what_to_string(w);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &p))
return -ENOMEM;
return 0;
}
static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
Session *session = NULL;
User *user = NULL;
@ -466,9 +490,9 @@ static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMess
} else {
do {
free(id);
asprintf(&id, "c%lu", ++m->session_counter);
id = NULL;
if (!id) {
if (asprintf(&id, "c%lu", ++m->session_counter) < 0) {
r = -ENOMEM;
goto fail;
}
@ -602,6 +626,122 @@ fail:
return r;
}
static int bus_manager_inhibit(Manager *m, DBusConnection *connection, DBusMessage *message, DBusError *error, DBusMessage **_reply) {
Inhibitor *i = NULL;
char *id = NULL;
const char *who, *why, *what;
pid_t pid;
InhibitWhat w;
unsigned long ul;
int r, fifo_fd = -1;
DBusMessage *reply = NULL;
assert(m);
assert(connection);
assert(message);
assert(error);
assert(_reply);
if (!dbus_message_get_args(
message,
error,
DBUS_TYPE_STRING, &what,
DBUS_TYPE_STRING, &who,
DBUS_TYPE_STRING, &why,
DBUS_TYPE_INVALID)) {
r = -EIO;
goto fail;
}
w = inhibit_what_from_string(what);
if (w <= 0) {
r = -EINVAL;
goto fail;
}
r = verify_polkit(connection, message, "org.freedesktop.login1.inhibit", false, NULL, error);
if (r < 0)
goto fail;
ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), error);
if (ul == (unsigned long) -1) {
r = -EIO;
goto fail;
}
pid = bus_get_unix_process_id(connection, dbus_message_get_sender(message), error);
if (pid <= 0) {
r = -EIO;
goto fail;
}
do {
free(id);
id = NULL;
if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0) {
r = -ENOMEM;
goto fail;
}
} while (hashmap_get(m->inhibitors, id));
r = manager_add_inhibitor(m, id, &i);
free(id);
if (r < 0)
goto fail;
i->what = w;
i->pid = pid;
i->uid = (uid_t) ul;
i->why = strdup(why);
i->who = strdup(who);
if (!i->why || !i->who) {
r = -ENOMEM;
goto fail;
}
fifo_fd = inhibitor_create_fifo(i);
if (fifo_fd < 0) {
r = fifo_fd;
goto fail;
}
reply = dbus_message_new_method_return(message);
if (!reply) {
r = -ENOMEM;
goto fail;
}
if (!dbus_message_append_args(
reply,
DBUS_TYPE_UNIX_FD, &fifo_fd,
DBUS_TYPE_INVALID)) {
r = -ENOMEM;
goto fail;
}
close_nointr_nofail(fifo_fd);
*_reply = reply;
inhibitor_start(i);
return 0;
fail:
if (i)
inhibitor_free(i);
if (fifo_fd >= 0)
close_nointr_nofail(fifo_fd);
if (reply)
dbus_message_unref(reply);
return r;
}
static int trigger_device(Manager *m, struct udev_device *d) {
struct udev_enumerate *e;
struct udev_list_entry *first, *item;
@ -780,6 +920,7 @@ static const BusProperty bus_login_manager_properties[] = {
{ "IdleHint", bus_manager_append_idle_hint, "b", 0 },
{ "IdleSinceHint", bus_manager_append_idle_hint_since, "t", 0 },
{ "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", 0 },
{ "Inhibited", bus_manager_append_inhibited, "s", 0 },
{ NULL, }
};
@ -1067,6 +1208,56 @@ static DBusHandlerResult manager_message_handler(
if (!dbus_message_iter_close_container(&iter, &sub))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListInhibitors")) {
Inhibitor *inhibitor;
Iterator i;
DBusMessageIter iter, sub;
reply = dbus_message_new_method_return(message);
if (!reply)
goto oom;
dbus_message_iter_init_append(reply, &iter);
if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sssuu)", &sub))
goto oom;
HASHMAP_FOREACH(inhibitor, m->inhibitors, i) {
DBusMessageIter sub2;
dbus_uint32_t uid, pid;
const char *what, *who, *why;
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
goto oom;
what = inhibit_what_to_string(inhibitor->what);
who = strempty(inhibitor->who);
why = strempty(inhibitor->why);
uid = (dbus_uint32_t) inhibitor->uid;
pid = (dbus_uint32_t) inhibitor->pid;
if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &what) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &who) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &why) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &pid))
goto oom;
if (!dbus_message_iter_close_container(&sub, &sub2))
goto oom;
}
if (!dbus_message_iter_close_container(&iter, &sub))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "Inhibit")) {
r = bus_manager_inhibit(m, connection, message, &error, &reply);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
r = bus_manager_create_session(m, message, &reply);
@ -1077,7 +1268,7 @@ static DBusHandlerResult manager_message_handler(
* see this fail quickly then be retried later */
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
return bus_send_error_reply(connection, message, NULL, r);
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ReleaseSession")) {
const char *name;
@ -1441,11 +1632,10 @@ static DBusHandlerResult manager_message_handler(
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "PowerOff") ||
dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "Reboot")) {
dbus_bool_t interactive;
bool multiple_sessions;
bool multiple_sessions, inhibit;
DBusMessage *forward, *freply;
const char *name;
const char *name, *action;
const char *mode = "replace";
const char *action;
if (!dbus_message_get_args(
message,
@ -1459,26 +1649,37 @@ static DBusHandlerResult manager_message_handler(
return bus_send_error_reply(connection, message, &error, r);
multiple_sessions = r > 0;
inhibit = !!(manager_inhibit_what(m) & INHIBIT_SHUTDOWN);
if (streq(dbus_message_get_member(message), "PowerOff")) {
if (multiple_sessions)
action = "org.freedesktop.login1.power-off-multiple-sessions";
else
action = "org.freedesktop.login1.power-off";
if (multiple_sessions) {
action = streq(dbus_message_get_member(message), "PowerOff") ?
"org.freedesktop.login1.power-off-multiple-sessions" :
"org.freedesktop.login1.reboot-multiple-sessions";
name = SPECIAL_POWEROFF_TARGET;
} else {
if (multiple_sessions)
action = "org.freedesktop.login1.reboot-multiple-sessions";
else
action = "org.freedesktop.login1.reboot";
name = SPECIAL_REBOOT_TARGET;
r = verify_polkit(connection, message, action, interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
}
r = verify_polkit(connection, message, action, interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (inhibit) {
action = streq(dbus_message_get_member(message), "PowerOff") ?
"org.freedesktop.login1.power-off-ignore-inhibit" :
"org.freedesktop.login1.reboot-ignore-inhibit";
r = verify_polkit(connection, message, action, interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
}
if (!multiple_sessions && !inhibit) {
action = streq(dbus_message_get_member(message), "PowerOff") ?
"org.freedesktop.login1.power-off" :
"org.freedesktop.login1.reboot";
r = verify_polkit(connection, message, action, interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
}
forward = dbus_message_new_method_call(
"org.freedesktop.systemd1",
@ -1488,6 +1689,9 @@ static DBusHandlerResult manager_message_handler(
if (!forward)
return bus_send_error_reply(connection, message, NULL, -ENOMEM);
name = streq(dbus_message_get_member(message), "PowerOff") ?
SPECIAL_POWEROFF_TARGET : SPECIAL_REBOOT_TARGET;
if (!dbus_message_append_args(forward,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &mode,
@ -1511,43 +1715,77 @@ static DBusHandlerResult manager_message_handler(
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CanPowerOff") ||
dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CanReboot")) {
bool multiple_sessions, challenge, b;
const char *t, *action;
bool multiple_sessions, challenge, inhibit, b;
const char *action, *result;
r = have_multiple_sessions(connection, m, message, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
multiple_sessions = r > 0;
inhibit = !!(manager_inhibit_what(m) & INHIBIT_SHUTDOWN);
if (streq(dbus_message_get_member(message), "CanPowerOff")) {
if (multiple_sessions)
action = "org.freedesktop.login1.power-off-multiple-sessions";
else
action = "org.freedesktop.login1.power-off";
if (multiple_sessions) {
action = streq(dbus_message_get_member(message), "CanPowerOff") ?
"org.freedesktop.login1.power-off-multiple-sessions" :
"org.freedesktop.login1.reboot-multiple-sessions";
} else {
if (multiple_sessions)
action = "org.freedesktop.login1.reboot-multiple-sessions";
r = verify_polkit(connection, message, action, false, &challenge, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (r > 0)
result = "yes";
else if (challenge)
result = "challenge";
else
action = "org.freedesktop.login1.reboot";
result = "no";
}
r = verify_polkit(connection, message, action, false, &challenge, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (inhibit) {
action = streq(dbus_message_get_member(message), "CanPowerOff") ?
"org.freedesktop.login1.power-off-ignore-inhibit" :
"org.freedesktop.login1.reboot-ignore-inhibit";
r = verify_polkit(connection, message, action, false, &challenge, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (r > 0 && !result)
result = "yes";
else if (challenge && (!result || streq(result, "yes")))
result = "challenge";
else
result = "no";
}
if (!multiple_sessions && !inhibit) {
/* If neither inhibit nor multiple sessions
* apply then just check the normal policy */
action = streq(dbus_message_get_member(message), "CanPowerOff") ?
"org.freedesktop.login1.power-off" :
"org.freedesktop.login1.reboot";
r = verify_polkit(connection, message, action, false, &challenge, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (r > 0)
result = "yes";
else if (challenge)
result = "challenge";
else
result = "no";
}
reply = dbus_message_new_method_return(message);
if (!reply)
goto oom;
t = r > 0 ? "yes" :
challenge ? "challenge" :
"no";
b = dbus_message_append_args(
reply,
DBUS_TYPE_STRING, &t,
DBUS_TYPE_STRING, &result,
DBUS_TYPE_INVALID);
if (!b)
goto oom;

365
src/login/logind-inhibit.c Normal file
View File

@ -0,0 +1,365 @@
/*-*- 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 <errno.h>
#include <fcntl.h>
#include <sys/epoll.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "util.h"
#include "mkdir.h"
#include "logind-inhibit.h"
Inhibitor* inhibitor_new(Manager *m, const char* id) {
Inhibitor *i;
assert(m);
i = new0(Inhibitor, 1);
if (!i)
return NULL;
i->state_file = strappend("/run/systemd/inhibit/", id);
if (!i->state_file) {
free(i);
return NULL;
}
i->id = file_name_from_path(i->state_file);
if (hashmap_put(m->inhibitors, i->id, i) < 0) {
free(i->state_file);
free(i);
return NULL;
}
i->manager = m;
i->fifo_fd = -1;
return i;
}
void inhibitor_free(Inhibitor *i) {
assert(i);
free(i->who);
free(i->why);
hashmap_remove(i->manager->inhibitors, i->id);
inhibitor_remove_fifo(i);
if (i->state_file) {
unlink(i->state_file);
free(i->state_file);
}
free(i);
}
int inhibitor_save(Inhibitor *i) {
char *temp_path, *cc;
int r;
FILE *f;
assert(i);
r = safe_mkdir("/run/systemd/inhibit", 0755, 0, 0);
if (r < 0)
goto finish;
r = fopen_temporary(i->state_file, &f, &temp_path);
if (r < 0)
goto finish;
fchmod(fileno(f), 0644);
fprintf(f,
"# This is private data. Do not parse.\n"
"WHAT=%s\n"
"UID=%lu\n"
"PID=%lu\n",
inhibit_what_to_string(i->what),
(unsigned long) i->uid,
(unsigned long) i->pid);
if (i->who) {
cc = cescape(i->who);
if (!cc)
r = -ENOMEM;
else {
fprintf(f, "WHO=%s\n", cc);
free(cc);
}
}
if (i->why) {
cc = cescape(i->why);
if (!cc)
r = -ENOMEM;
else {
fprintf(f, "WHY=%s\n", cc);
free(cc);
}
}
if (i->fifo_path)
fprintf(f, "FIFO=%s\n", i->fifo_path);
fflush(f);
if (ferror(f) || rename(temp_path, i->state_file) < 0) {
r = -errno;
unlink(i->state_file);
unlink(temp_path);
}
fclose(f);
free(temp_path);
finish:
if (r < 0)
log_error("Failed to save inhibit data for %s: %s", i->id, strerror(-r));
return r;
}
int inhibitor_start(Inhibitor *i) {
assert(i);
if (i->started)
return 0;
log_debug("Inhibitor %s (%s) pid=%lu uid=%lu started.",
strna(i->who), strna(i->why),
(unsigned long) i->pid, (unsigned long) i->uid);
inhibitor_save(i);
i->started = true;
manager_send_changed(i->manager, "Inhibited\0");
return 0;
}
int inhibitor_stop(Inhibitor *i) {
assert(i);
if (i->started)
log_debug("Inhibitor %s (%s) pid=%lu uid=%lu stopped.",
strna(i->who), strna(i->why),
(unsigned long) i->pid, (unsigned long) i->uid);
if (i->state_file)
unlink(i->state_file);
i->started = false;
manager_send_changed(i->manager, "Inhibited\0");
return 0;
}
int inhibitor_load(Inhibitor *i) {
InhibitWhat w;
int r;
char *cc,
*what = NULL,
*uid = NULL,
*pid = NULL,
*who = NULL,
*why = NULL;
r = parse_env_file(i->state_file, NEWLINE,
"WHAT", &what,
"UID", &uid,
"PID", &pid,
"WHO", &who,
"WHY", &why,
"FIFO", &i->fifo_path,
NULL);
if (r < 0)
goto finish;
w = inhibit_what_from_string(what);
if (w >= 0)
i->what = w;
parse_uid(uid, &i->uid);
parse_pid(pid, &i->pid);
if (who) {
cc = cunescape(who);
if (!cc) {
r = -ENOMEM;
goto finish;
}
free(i->who);
i->who = cc;
}
if (why) {
cc = cunescape(why);
if (!cc) {
r = -ENOMEM;
goto finish;
}
free(i->why);
i->why = cc;
}
if (i->fifo_path) {
int fd;
fd = inhibitor_create_fifo(i);
if (fd >= 0)
close_nointr_nofail(fd);
}
finish:
free(what);
free(uid);
free(pid);
free(who);
free(why);
return r;
}
int inhibitor_create_fifo(Inhibitor *i) {
int r;
assert(i);
/* Create FIFO */
if (!i->fifo_path) {
r = safe_mkdir("/run/systemd/inhibit", 0755, 0, 0);
if (r < 0)
return r;
if (asprintf(&i->fifo_path, "/run/systemd/inhibit/%s.ref", i->id) < 0)
return -ENOMEM;
if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST)
return -errno;
}
/* Open reading side */
if (i->fifo_fd < 0) {
struct epoll_event ev;
i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY);
if (i->fifo_fd < 0)
return -errno;
r = hashmap_put(i->manager->inhibitor_fds, INT_TO_PTR(i->fifo_fd + 1), i);
if (r < 0)
return r;
zero(ev);
ev.events = 0;
ev.data.u32 = FD_FIFO_BASE + i->fifo_fd;
if (epoll_ctl(i->manager->epoll_fd, EPOLL_CTL_ADD, i->fifo_fd, &ev) < 0)
return -errno;
}
/* Open writing side */
r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY);
if (r < 0)
return -errno;
return r;
}
void inhibitor_remove_fifo(Inhibitor *i) {
assert(i);
if (i->fifo_fd >= 0) {
assert_se(hashmap_remove(i->manager->inhibitor_fds, INT_TO_PTR(i->fifo_fd + 1)) == i);
assert_se(epoll_ctl(i->manager->epoll_fd, EPOLL_CTL_DEL, i->fifo_fd, NULL) == 0);
close_nointr_nofail(i->fifo_fd);
i->fifo_fd = -1;
}
if (i->fifo_path) {
unlink(i->fifo_path);
free(i->fifo_path);
i->fifo_path = NULL;
}
}
InhibitWhat manager_inhibit_what(Manager *m) {
Inhibitor *i;
Iterator j;
InhibitWhat what = 0;
assert(m);
HASHMAP_FOREACH(i, m->inhibitor_fds, j)
what |= i->what;
return what;
}
const char *inhibit_what_to_string(InhibitWhat w) {
static const char* const table[_INHIBIT_WHAT_MAX] = {
[0] = "",
[INHIBIT_SHUTDOWN] = "shutdown",
[INHIBIT_SUSPEND] = "suspend",
[INHIBIT_IDLE] = "idle",
[INHIBIT_SHUTDOWN|INHIBIT_SUSPEND] = "shutdown:suspend",
[INHIBIT_SHUTDOWN|INHIBIT_IDLE] = "shutdown:idle",
[INHIBIT_SHUTDOWN|INHIBIT_SUSPEND|INHIBIT_IDLE] = "shutdown:suspend:idle",
[INHIBIT_SUSPEND|INHIBIT_IDLE] = "suspend:idle"
};
if (w < 0 || w >= _INHIBIT_WHAT_MAX)
return NULL;
return table[w];
}
InhibitWhat inhibit_what_from_string(const char *s) {
InhibitWhat what = 0;
char *w, *state;
size_t l;
FOREACH_WORD_SEPARATOR(w, l, s, ":", state) {
if (l == 8 && strncmp(w, "shutdown", l) == 0)
what |= INHIBIT_SHUTDOWN;
else if (l == 7 && strncmp(w, "suspend", l) == 0)
what |= INHIBIT_SUSPEND;
else if (l == 4 && strncmp(w, "idle", l) == 0)
what |= INHIBIT_IDLE;
else
return _INHIBIT_WHAT_INVALID;
}
return what;
}

76
src/login/logind-inhibit.h Normal file
View File

@ -0,0 +1,76 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef foologindinhibithfoo
#define foologindinhibithfoo
/***
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/>.
***/
typedef struct Inhibitor Inhibitor;
#include "list.h"
#include "util.h"
#include "logind.h"
#include "logind-seat.h"
typedef enum InhibitWhat {
INHIBIT_SHUTDOWN = 1,
INHIBIT_SUSPEND = 2,
INHIBIT_IDLE = 4,
_INHIBIT_WHAT_MAX = 8,
_INHIBIT_WHAT_INVALID = -1
} InhibitWhat;
struct Inhibitor {
Manager *manager;
char *id;
char *state_file;
bool started;
InhibitWhat what;
char *who;
char *why;
pid_t pid;
uid_t uid;
char *fifo_path;
int fifo_fd;
};
Inhibitor* inhibitor_new(Manager *m, const char *id);
void inhibitor_free(Inhibitor *i);
int inhibitor_save(Inhibitor *i);
int inhibitor_load(Inhibitor *i);
int inhibitor_start(Inhibitor *i);
int inhibitor_stop(Inhibitor *i);
int inhibitor_create_fifo(Inhibitor *i);
void inhibitor_remove_fifo(Inhibitor *i);
InhibitWhat manager_inhibit_what(Manager *m);
const char *inhibit_what_to_string(InhibitWhat k);
InhibitWhat inhibit_what_from_string(const char *s);
#endif

21
src/login/logind-session.c
View File

@ -25,11 +25,11 @@
#include <sys/epoll.h>
#include <fcntl.h>
#include "logind-session.h"
#include "strv.h"
#include "util.h"
#include "mkdir.h"
#include "cgroup-util.h"
#include "logind-session.h"
#define IDLE_THRESHOLD_USEC (5*USEC_PER_MINUTE)
@ -52,7 +52,7 @@ Session* session_new(Manager *m, User *u, const char *id) {
s->id = file_name_from_path(s->state_file);
if (hashmap_put(m->sessions, s->id, s) < 0) {
free(s->id);
free(s->state_file);
free(s);
return NULL;
}
@ -99,7 +99,6 @@ void session_free(Session *s) {
free(s->service);
hashmap_remove(s->manager->sessions, s->id);
session_remove_fifo(s);
free(s->state_file);
@ -287,14 +286,9 @@ int session_load(Session *s) {
}
if (leader) {
pid_t pid;
k = parse_pid(leader, &pid);
if (k >= 0 && pid >= 1) {
s->leader = pid;
audit_session_from_pid(pid, &s->audit_id);
}
k = parse_pid(leader, &s->leader);
if (k >= 0)
audit_session_from_pid(s->leader, &s->audit_id);
}
if (type) {
@ -326,7 +320,6 @@ int session_load(Session *s) {
close_nointr_nofail(fd);
}
finish:
free(remote);
free(kill_processes);
@ -840,7 +833,7 @@ int session_create_fifo(Session *s) {
if (s->fifo_fd < 0)
return -errno;
r = hashmap_put(s->manager->fifo_fds, INT_TO_PTR(s->fifo_fd + 1), s);
r = hashmap_put(s->manager->session_fds, INT_TO_PTR(s->fifo_fd + 1), s);
if (r < 0)
return r;
@ -864,7 +857,7 @@ void session_remove_fifo(Session *s) {
assert(s);
if (s->fifo_fd >= 0) {
assert_se(hashmap_remove(s->manager->fifo_fds, INT_TO_PTR(s->fifo_fd + 1)) == s);
assert_se(hashmap_remove(s->manager->session_fds, INT_TO_PTR(s->fifo_fd + 1)) == s);
assert_se(epoll_ctl(s->manager->epoll_fd, EPOLL_CTL_DEL, s->fifo_fd, NULL) == 0);
close_nointr_nofail(s->fifo_fd);
s->fifo_fd = -1;

116
src/login/logind.c
View File

@ -55,10 +55,14 @@ Manager *manager_new(void) {
m->seats = hashmap_new(string_hash_func, string_compare_func);
m->sessions = hashmap_new(string_hash_func, string_compare_func);
m->users = hashmap_new(trivial_hash_func, trivial_compare_func);
m->cgroups = hashmap_new(string_hash_func, string_compare_func);
m->fifo_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
m->inhibitors = hashmap_new(string_hash_func, string_compare_func);
if (!m->devices || !m->seats || !m->sessions || !m->users || !m->cgroups || !m->fifo_fds) {
m->cgroups = hashmap_new(string_hash_func, string_compare_func);
m->session_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
m->inhibitor_fds = hashmap_new(trivial_hash_func, trivial_compare_func);
if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors ||
!m->cgroups || !m->session_fds || !m->inhibitor_fds) {
manager_free(m);
return NULL;
}
@ -89,6 +93,7 @@ void manager_free(Manager *m) {
User *u;
Device *d;
Seat *s;
Inhibitor *i;
assert(m);
@ -104,12 +109,18 @@ void manager_free(Manager *m) {
while ((s = hashmap_first(m->seats)))
seat_free(s);
hashmap_free(m->sessions);
hashmap_free(m->users);
while ((i = hashmap_first(m->inhibitors)))
inhibitor_free(i);
hashmap_free(m->devices);
hashmap_free(m->seats);
hashmap_free(m->sessions);
hashmap_free(m->users);
hashmap_free(m->inhibitors);
hashmap_free(m->cgroups);
hashmap_free(m->fifo_fds);
hashmap_free(m->session_fds);
hashmap_free(m->inhibitor_fds);
if (m->console_active_fd >= 0)
close_nointr_nofail(m->console_active_fd);
@ -268,6 +279,30 @@ int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
}
int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor) {
Inhibitor *i;
assert(m);
assert(id);
i = hashmap_get(m->inhibitors, id);
if (i) {
if (_inhibitor)
*_inhibitor = i;
return 0;
}
i = inhibitor_new(m, id);
if (!i)
return -ENOMEM;
if (_inhibitor)
*_inhibitor = i;
return 0;
}
int manager_process_seat_device(Manager *m, struct udev_device *d) {
Device *device;
int r;
@ -412,10 +447,9 @@ int manager_enumerate_seats(Manager *m) {
}
static int manager_enumerate_users_from_cgroup(Manager *m) {
int r = 0;
int r = 0, k;
char *name;
DIR *d;
int k;
r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &d);
if (r < 0) {
@ -641,6 +675,46 @@ int manager_enumerate_sessions(Manager *m) {
return r;
}
int manager_enumerate_inhibitors(Manager *m) {
DIR *d;
struct dirent *de;
int r = 0;
assert(m);
d = opendir("/run/systemd/inhibit");
if (!d) {
if (errno == ENOENT)
return 0;
log_error("Failed to open /run/systemd/inhibit: %m");
return -errno;
}
while ((de = readdir(d))) {
int k;
Inhibitor *i;
if (!dirent_is_file(de))
continue;
k = manager_add_inhibitor(m, de->d_name, &i);
if (k < 0) {
log_notice("Couldn't add inhibitor %s: %s", de->d_name, strerror(-k));
r = k;
continue;
}
k = inhibitor_load(i);
if (k < 0)
r = k;
}
closedir(d);
return r;
}
int manager_dispatch_seat_udev(Manager *m) {
struct udev_device *d;
int r;
@ -853,15 +927,28 @@ void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {
static void manager_pipe_notify_eof(Manager *m, int fd) {
Session *s;
Inhibitor *i;
assert_se(m);
assert_se(fd >= 0);
assert_se(s = hashmap_get(m->fifo_fds, INT_TO_PTR(fd + 1)));
assert(s->fifo_fd == fd);
session_remove_fifo(s);
s = hashmap_get(m->session_fds, INT_TO_PTR(fd + 1));
if (s) {
assert(s->fifo_fd == fd);
session_remove_fifo(s);
session_stop(s);
return;
}
session_stop(s);
i = hashmap_get(m->inhibitor_fds, INT_TO_PTR(fd + 1));
if (i) {
assert(i->fifo_fd == fd);
inhibitor_stop(i);
inhibitor_free(i);
return;
}
assert_not_reached("Got EOF on unknown pipe");
}
static int manager_connect_bus(Manager *m) {
@ -1110,6 +1197,7 @@ int manager_startup(Manager *m) {
Seat *seat;
Session *session;
User *user;
Inhibitor *inhibitor;
Iterator i;
assert(m);
@ -1144,6 +1232,7 @@ int manager_startup(Manager *m) {
manager_enumerate_seats(m);
manager_enumerate_users(m);
manager_enumerate_sessions(m);
manager_enumerate_inhibitors(m);
/* Remove stale objects before we start them */
manager_gc(m, false);
@ -1158,6 +1247,9 @@ int manager_startup(Manager *m) {
HASHMAP_FOREACH(session, m->sessions, i)
session_start(session);
HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
inhibitor_start(inhibitor);
return 0;
}

8
src/login/logind.h
View File

@ -39,6 +39,7 @@ typedef struct Manager Manager;
#include "logind-seat.h"
#include "logind-session.h"
#include "logind-user.h"
#include "logind-inhibit.h"
struct Manager {
DBusConnection *bus;
@ -47,6 +48,7 @@ struct Manager {
Hashmap *seats;
Hashmap *sessions;
Hashmap *users;
Hashmap *inhibitors;
LIST_HEAD(Seat, seat_gc_queue);
LIST_HEAD(Session, session_gc_queue);
@ -74,9 +76,11 @@ struct Manager {
bool kill_user_processes;
unsigned long session_counter;
unsigned long inhibit_counter;
Hashmap *cgroups;
Hashmap *fifo_fds;
Hashmap *session_fds;
Hashmap *inhibitor_fds;
};
enum {
@ -96,6 +100,7 @@ int manager_add_session(Manager *m, User *u, const char *id, Session **_session)
int manager_add_user(Manager *m, uid_t uid, gid_t gid, const char *name, User **_user);
int manager_add_user_by_name(Manager *m, const char *name, User **_user);
int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user);
int manager_add_inhibitor(Manager *m, const char* id, Inhibitor **_inhibitor);
int manager_process_seat_device(Manager *m, struct udev_device *d);
int manager_dispatch_seat_udev(Manager *m);
@ -106,6 +111,7 @@ int manager_enumerate_devices(Manager *m);
int manager_enumerate_seats(Manager *m);
int manager_enumerate_sessions(Manager *m);
int manager_enumerate_users(Manager *m);
int manager_enumerate_inhibitors(Manager *m);
int manager_startup(Manager *m);
int manager_run(Manager *m);

8
src/login/org.freedesktop.login1.conf
View File

@ -64,6 +64,14 @@
send_interface="org.freedesktop.login1.Manager"
send_member="ListSeats"/>
<allow send_destination="org.freedesktop.login1"
send_interface="org.freedesktop.login1.Manager"
send_member="ListInhibitors"/>
<allow send_destination="org.freedesktop.login1"
send_interface="org.freedesktop.login1.Manager"
send_member="Inhibit"/>
<allow send_destination="org.freedesktop.login1"
send_interface="org.freedesktop.login1.Manager"
send_member="SetUserLinger"/>

30
src/login/org.freedesktop.login1.policy.in
View File

@ -16,6 +16,16 @@
<vendor>The systemd Project</vendor>
<vendor_url>http://www.freedesktop.org/wiki/Software/systemd</vendor_url>
<action id="org.freedesktop.login1.inhibit">
<_description>Allow applications to inhibit system shutdown and suspend</_description>
<_message>Authentication is required to allow an application to inhibit system shutdown or suspend</_message>
<defaults>
<allow_any>auth_admin_keep</allow_any>
<allow_inactive>yes</allow_inactive>
<allow_active>yes</allow_active>
</defaults>
</action>
<action id="org.freedesktop.login1.set-user-linger">
<_description>Allow non-logged-in users to run programs</_description>
<_message>Authentication is required to allow a non-logged-in user to run programs</_message>
@ -66,6 +76,16 @@
</defaults>
</action>
<action id="org.freedesktop.login1.power-off-ignore-inhibit">
<_description>Power off the system when an application asked to inhibit it</_description>
<_message>Authentication is required to allow powering off the system while an application asked to inhibit it</_message>
<defaults>
<allow_any>auth_admin_keep</allow_any>
<allow_inactive>auth_admin_keep</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
<action id="org.freedesktop.login1.reboot">
<_description>Reboot the system</_description>
<_message>Authentication is required to allow rebooting the system</_message>
@ -86,4 +106,14 @@
</defaults>
</action>
<action id="org.freedesktop.login1.reboot-ignore-inhibit">
<_description>Reboot the system when an application asked to inhibit it</_description>
<_message>Authentication is required to allow rebooting the system while an application asked to inhibit it</_message>
<defaults>
<allow_any>auth_admin_keep</allow_any>
<allow_inactive>auth_admin_keep</allow_inactive>
<allow_active>auth_admin_keep</allow_active>
</defaults>
</action>
</policyconfig>

137
src/login/test-inhibit.c Normal file
View File

@ -0,0 +1,137 @@
/*-*- 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 <unistd.h>
#include <dbus/dbus.h>
#include "macro.h"
#include "util.h"
#include "dbus-common.h"
static int inhibit(DBusConnection *bus, const char *what) {
DBusMessage *m, *reply;
DBusError error;
const char *who = "Test Tool", *reason = "Just because!";
int fd;
dbus_error_init(&error);
m = dbus_message_new_method_call(
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"Inhibit");
assert(m);
assert_se(dbus_message_append_args(m,
DBUS_TYPE_STRING, &what,
DBUS_TYPE_STRING, &who,
DBUS_TYPE_STRING, &reason,
DBUS_TYPE_INVALID));
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
assert(reply);
assert(dbus_message_get_args(reply, &error,
DBUS_TYPE_UNIX_FD, &fd,
DBUS_TYPE_INVALID));
dbus_message_unref(m);
dbus_message_unref(reply);
return fd;
}
static void print_inhibitors(DBusConnection *bus) {
DBusMessage *m, *reply;
DBusError error;
unsigned n = 0;
DBusMessageIter iter, sub, sub2;
dbus_error_init(&error);
m = dbus_message_new_method_call(
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ListInhibitors");
assert(m);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
assert(reply);
assert(dbus_message_iter_init(reply, &iter));
dbus_message_iter_recurse(&iter, &sub);
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
const char *what, *who, *reason;
dbus_uint32_t uid, pid;
dbus_message_iter_recurse(&sub, &sub2);
assert_se(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) >= 0);
assert_se(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) >= 0);
assert_se(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &reason, true) >= 0);
assert_se(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) >= 0);
assert_se(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) >= 0);
printf("what=<%s> who=<%s> reason=<%s> uid=<%lu> pid=<%lu>\n",
what, who, reason, (unsigned long) uid, (unsigned long) pid);
dbus_message_iter_next(&sub);
n++;
}
printf("%u inhibitors\n", n);
dbus_message_unref(m);
dbus_message_unref(reply);
}
int main(int argc, char*argv[]) {
DBusConnection *bus;
int fd1, fd2;
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, NULL);
assert(bus);
print_inhibitors(bus);
fd1 = inhibit(bus, "suspend");
assert(fd1 >= 0);
print_inhibitors(bus);
fd2 = inhibit(bus, "idle:shutdown");
assert(fd2 >= 0);
print_inhibitors(bus);
close_nointr_nofail(fd1);
sleep(1);
print_inhibitors(bus);
close_nointr_nofail(fd2);
sleep(1);
print_inhibitors(bus);
return 0;
}

50
src/shared/dbus-common.c
View File

@ -1155,3 +1155,53 @@ DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
/* This mimics dbus_bus_get_unix_user() */
pid_t bus_get_unix_process_id(
DBusConnection *connection,
const char *name,
DBusError *error) {
DBusMessage *m = NULL, *reply = NULL;
uint32_t pid = 0;
m = dbus_message_new_method_call(
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionUnixProcessID");
if (!m) {
dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
goto finish;
}
if (!dbus_message_append_args(
m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID)) {
dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
goto finish;
}
reply = dbus_connection_send_with_reply_and_block(connection, m, -1, error);
if (!reply)
goto finish;
if (dbus_set_error_from_message(error, reply))
goto finish;
if (!dbus_message_get_args(
reply, error,
DBUS_TYPE_UINT32, &pid,
DBUS_TYPE_INVALID))
goto finish;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
return (pid_t) pid;
}

2
src/shared/dbus-common.h
View File

@ -199,4 +199,6 @@ void bus_async_unregister_and_exit(DBusConnection *bus, const char *name);
DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void *userdata);
pid_t bus_get_unix_process_id(DBusConnection *connection, const char *name, DBusError *error);
#endif

52
src/shared/polkit.c
View File

@ -27,56 +27,6 @@
#include "dbus-common.h"
#include "polkit.h"
/* This mimics dbus_bus_get_unix_user() */
static pid_t get_unix_process_id(
DBusConnection *connection,
const char *name,
DBusError *error) {
DBusMessage *m = NULL, *reply = NULL;
uint32_t pid = 0;
m = dbus_message_new_method_call(
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionUnixProcessID");
if (!m) {
dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
goto finish;
}
if (!dbus_message_append_args(
m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID)) {
dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
goto finish;
}
reply = dbus_connection_send_with_reply_and_block(connection, m, -1, error);
if (!reply)
goto finish;
if (dbus_set_error_from_message(error, reply))
goto finish;
if (!dbus_message_get_args(
reply, error,
DBUS_TYPE_UINT32, &pid,
DBUS_TYPE_INVALID))
goto finish;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
return (pid_t) pid;
}
int verify_polkit(
DBusConnection *c,
DBusMessage *request,
@ -104,7 +54,7 @@ int verify_polkit(
if (!sender)
return -EINVAL;
pid_raw = get_unix_process_id(c, sender, error);
pid_raw = bus_get_unix_process_id(c, sender, error);
if (pid_raw == 0)
return -EINVAL;

3
src/shared/util.c
View File

@ -1690,7 +1690,8 @@ char *cescape(const char *s) {
/* Does C style string escaping. */
if (!(r = new(char, strlen(s)*4 + 1)))
r = new(char, strlen(s)*4 + 1);
if (!r)
return NULL;
for (f = s, t = r; *f; f++)