#include <errno.h>
#include <string.h>
+#include <unistd.h>
#include "logind.h"
#include "dbus-common.h"
+#include "strv.h"
#define BUS_MANAGER_INTERFACE \
" <interface name=\"org.freedesktop.login1.Manager\">\n" \
" <method name=\"CreateSession\">\n" \
" <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n" \
" <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n" \
+ " <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"type\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
" <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
- " <arg name=\"kill_processes\" type=\"as\" direction=\"in\"/>\n" \
+ " <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
" <arg name=\"id\" type=\"s\" direction=\"out\"/>\n" \
" <arg name=\"path\" type=\"o\" direction=\"out\"/>\n" \
+ " <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
" <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n" \
" </method>\n" \
" <method name=\"ActivateSession\">\n" \
return 0;
}
+static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
+ Session *session = NULL;
+ User *user = NULL;
+ const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
+ uint32_t uid, leader, audit_id = 0;
+ dbus_bool_t remote, kill_processes;
+ char **controllers = NULL, **reset_controllers = NULL;
+ SessionType t;
+ Seat *s;
+ DBusMessageIter iter;
+ int r;
+ char *id, *p;
+ int vtnr = -1;
+ int pipe_fds[2] = { -1, -1 };
+ DBusMessage *reply = NULL;
+ bool b;
+
+ assert(m);
+ assert(message);
+ assert(_reply);
+
+ if (!dbus_message_iter_init(message, &iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &uid);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &leader);
+
+ if (leader <= 0 ||
+ !dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &service);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &type);
+ t = session_type_from_string(type);
+
+ if (t < 0 ||
+ !dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &seat);
+
+ if (isempty(seat))
+ s = NULL;
+ else {
+ s = hashmap_get(m->seats, seat);
+ if (!s)
+ return -ENOENT;
+ }
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &tty);
+
+ if (tty_is_vc(tty)) {
+
+ if (!s)
+ s = m->vtconsole;
+ else if (s != m->vtconsole)
+ return -EINVAL;
+
+ vtnr = vtnr_from_tty(tty);
+
+ if (vtnr <= 0)
+ return vtnr < 0 ? vtnr : -EINVAL;
+
+ } else if (s == m->vtconsole)
+ return -EINVAL;
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &display);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &remote);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &remote_user);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ dbus_message_iter_get_basic(&iter, &remote_host);
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
+ dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
+ return -EINVAL;
+
+ r = bus_parse_strv_iter(&iter, &controllers);
+ if (r < 0)
+ return -EINVAL;
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
+ dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ r = bus_parse_strv_iter(&iter, &reset_controllers);
+ if (r < 0)
+ goto fail;
+
+ if (!dbus_message_iter_next(&iter) ||
+ dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ dbus_message_iter_get_basic(&iter, &kill_processes);
+
+ r = manager_add_user_by_uid(m, uid, &user);
+ if (r < 0)
+ goto fail;
+
+ audit_session_from_pid(leader, &audit_id);
+
+ if (audit_id > 0)
+ asprintf(&id, "%lu", (unsigned long) audit_id);
+ else
+ asprintf(&id, "c%lu", ++m->session_counter);
+
+ if (!id) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if (hashmap_get(m->sessions, id)) {
+ r = -EEXIST;
+ goto fail;
+ }
+
+ r = manager_add_session(m, user, id, &session);
+ free(id);
+ if (r < 0)
+ goto fail;
+
+ session->leader = leader;
+ session->audit_id = audit_id;
+ session->type = t;
+ session->remote = remote;
+ session->controllers = controllers;
+ session->reset_controllers = reset_controllers;
+ session->kill_processes = kill_processes;
+ session->vtnr = vtnr;
+
+ controllers = reset_controllers = NULL;
+
+ if (!isempty(tty)) {
+ session->tty = strdup(tty);
+ if (!session->tty) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!isempty(display)) {
+ session->display = strdup(display);
+ if (!session->display) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!isempty(remote_user)) {
+ session->remote_user = strdup(remote_user);
+ if (!session->remote_user) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!isempty(remote_host)) {
+ session->remote_host = strdup(remote_host);
+ if (!session->remote_host) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!isempty(service)) {
+ session->service = strdup(service);
+ if (!session->service) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (pipe(pipe_fds) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ session->pipe_fd = pipe_fds[1];
+ pipe_fds[1] = -1;
+
+ if (s) {
+ r = seat_attach_session(s, session);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = session_start(session);
+ if (r < 0)
+ goto fail;
+
+ reply = dbus_message_new_method_return(message);
+ if (!reply) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ p = session_bus_path(session);
+ if (!p) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ b = dbus_message_append_args(
+ reply,
+ DBUS_TYPE_STRING, &session->id,
+ DBUS_TYPE_OBJECT_PATH, &p,
+ DBUS_TYPE_STRING, &session->user->runtime_path,
+ DBUS_TYPE_UNIX_FD, &pipe_fds[0],
+ DBUS_TYPE_INVALID);
+ free(p);
+
+ if (!b) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ close_nointr_nofail(pipe_fds[0]);
+ *_reply = reply;
+
+ return 0;
+
+fail:
+ strv_free(controllers);
+ strv_free(reset_controllers);
+
+ if (session)
+ session_add_to_gc_queue(session);
+
+ if (user)
+ user_add_to_gc_queue(user);
+
+ close_pipe(pipe_fds);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ return r;
+}
+
static DBusHandlerResult manager_message_handler(
DBusConnection *connection,
DBusMessage *message,
const BusProperty properties[] = {
{ "org.freedesktop.login1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_path },
{ "org.freedesktop.login1.Manager", "Controllers", bus_property_append_strv, "as", m->controllers },
- { "org.freedesktop.login1.Manager", "ResetControllers", bus_property_append_strv, "as", m->reset_controllers },
{ "org.freedesktop.login1.Manager", "NAutoVTs", bus_property_append_unsigned, "u", &m->n_autovts },
{ "org.freedesktop.login1.Manager", "KillOnlyUsers", bus_property_append_strv, "as", m->kill_only_users },
{ "org.freedesktop.login1.Manager", "KillExcludeUsers", bus_property_append_strv, "as", m->kill_exclude_users },
if (!dbus_message_iter_close_container(&iter, &sub))
goto oom;
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
+
+ r = bus_manager_create_session(m, message, &reply);
+ if (r == -ENOMEM)
+ goto oom;
+
+ if (r < 0)
+ return bus_send_error_reply(connection, message, &error, r);
+
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
const char *name;
Session *session;
#include <security/pam_misc.h>
#include "util.h"
-#include "cgroup-util.h"
#include "macro.h"
#include "sd-daemon.h"
#include "strv.h"
+#include "dbus-common.h"
+#include "def.h"
static int parse_argv(pam_handle_t *handle,
int argc, const char **argv,
- bool *create_session,
- bool *kill_session,
- bool *kill_user,
char ***controllers,
char ***reset_controllers,
+ bool *kill_processes,
char ***kill_only_users,
char ***kill_exclude_users,
bool *debug) {
for (i = 0; i < (unsigned) argc; i++) {
int k;
- if (startswith(argv[i], "create-session=")) {
+ if (startswith(argv[i], "kill-processes=")) {
if ((k = parse_boolean(argv[i] + 15)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to parse create-session= argument.");
+ pam_syslog(handle, LOG_ERR, "Failed to parse kill-session= argument.");
return k;
}
- if (create_session)
- *create_session = k;
+ if (kill_processes)
+ *kill_processes = k;
} else if (startswith(argv[i], "kill-session=")) {
+ /* As compatibility for old versions */
+
if ((k = parse_boolean(argv[i] + 13)) < 0) {
pam_syslog(handle, LOG_ERR, "Failed to parse kill-session= argument.");
return k;
}
- if (kill_session)
- *kill_session = k;
-
- } else if (startswith(argv[i], "kill-user=")) {
- if ((k = parse_boolean(argv[i] + 10)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to parse kill-user= argument.");
- return k;
- }
-
- if (kill_user)
- *kill_user = k;
+ if (kill_processes)
+ *kill_processes = k;
} else if (startswith(argv[i], "controllers=")) {
if (debug)
*debug = k;
+ } else if (startswith(argv[i], "create-session=") ||
+ startswith(argv[i], "kill-user=")) {
+
+ pam_syslog(handle, LOG_WARNING, "Option %s not supported anymore, ignoring.", argv[i]);
+
} else {
pam_syslog(handle, LOG_ERR, "Unknown parameter '%s'.", argv[i]);
return -EINVAL;
}
if (controllers)
- strv_remove(*controllers, "name=systemd");
+ strv_remove(*controllers, SYSTEMD_CGROUP_CONTROLLER);
if (reset_controllers)
- strv_remove(*reset_controllers, "name=systemd");
-
- if (kill_session && *kill_session && kill_user)
- *kill_user = true;
+ strv_remove(*reset_controllers, SYSTEMD_CGROUP_CONTROLLER);
if (!kill_exclude_users_set && kill_exclude_users) {
char **l;
return 0;
}
-static int open_file_and_lock(const char *fn) {
- int fd;
-
- assert(fn);
-
- if ((fd = open(fn, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW|O_CREAT, 0600)) < 0)
- return -errno;
-
- /* The BSD socket semantics are a lot nicer than those of
- * POSIX locks. Which is why we use flock() here. BSD locking
- * does not work across NFS which however is not needed here
- * as the filesystems in question should be local, and only
- * locally accessible, and most likely even tmpfs. */
-
- if (flock(fd, LOCK_EX) < 0) {
- close_nointr_nofail(fd);
- return -errno;
- }
-
- return fd;
-}
-
-enum {
- SESSION_ID_AUDIT = 'a',
- SESSION_ID_COUNTER = 'c',
- SESSION_ID_RANDOM = 'r'
-};
-
-static uint64_t get_session_id(int *mode) {
- char *s;
- int fd;
-
- assert(mode);
-
- /* First attempt: let's use the session ID of the audit
- * system, if it is available. */
- if (have_effective_cap(CAP_AUDIT_CONTROL) > 0)
- if (read_one_line_file("/proc/self/sessionid", &s) >= 0) {
- uint32_t u;
- int r;
-
- r = safe_atou32(s, &u);
- free(s);
-
- if (r >= 0 && u != (uint32_t) -1 && u > 0) {
- *mode = SESSION_ID_AUDIT;
- return (uint64_t) u;
- }
- }
-
- /* Second attempt, use our own counter. */
- if ((fd = open_file_and_lock(RUNTIME_DIR "/user/.pam-systemd-session")) >= 0) {
- uint64_t counter;
- ssize_t r;
-
- /* We do a bit of endianess swapping here, just to be
- * sure. /run should be machine specific anyway, and
- * even mounted from tmpfs, so this byteswapping
- * should really not be necessary. But then again, you
- * never know, so let's avoid any risk. */
-
- if (loop_read(fd, &counter, sizeof(counter), false) != sizeof(counter))
- counter = 1;
- else
- counter = le64toh(counter) + 1;
-
- if (lseek(fd, 0, SEEK_SET) == 0) {
- uint64_t swapped = htole64(counter);
-
- r = loop_write(fd, &swapped, sizeof(swapped), false);
-
- if (r != sizeof(swapped))
- r = -EIO;
- } else
- r = -errno;
-
- close_nointr_nofail(fd);
-
- if (r >= 0) {
- *mode = SESSION_ID_COUNTER;
- return counter;
- }
- }
-
- *mode = SESSION_ID_RANDOM;
-
- /* Last attempt, pick a random value */
- return (uint64_t) random_ull();
-}
-
static int get_user_data(
pam_handle_t *handle,
const char **ret_username,
return PAM_SUCCESS;
}
-static int create_user_group(
- pam_handle_t *handle,
- const char *controller,
- const char *group,
- struct passwd *pw,
- bool attach,
- bool remember) {
-
- int r;
-
- assert(handle);
- assert(group);
-
- if (attach)
- r = cg_create_and_attach(controller, group, 0);
- else
- r = cg_create(controller, group);
-
- if (r < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to create cgroup: %s", strerror(-r));
- return PAM_SESSION_ERR;
- }
-
- if (r > 0 && remember) {
- /* Remember that it was us who created this group, and
- * that hence we need to remove it too. This is a
- * protection against removing the cgroup when run
- * recursively. */
- if ((r = pam_set_data(handle, "systemd.created", INT_TO_PTR(1), NULL)) != PAM_SUCCESS) {
- pam_syslog(handle, LOG_ERR, "Failed to install created variable.");
- return r;
- }
- }
-
- if ((r = cg_set_task_access(controller, group, 0644, pw->pw_uid, pw->pw_gid)) < 0 ||
- (r = cg_set_group_access(controller, group, 0755, pw->pw_uid, pw->pw_gid)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to change access modes: %s", strerror(-r));
- return PAM_SESSION_ERR;
- }
-
- return PAM_SUCCESS;
-}
-
-static int reset_group(
- pam_handle_t *handle,
- const char *controller) {
-
- int r;
-
- assert(handle);
-
- if ((r = cg_attach(controller, "/", 0)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to reset cgroup for controller %s: %s", controller, strerror(-r));
- return PAM_SESSION_ERR;
- }
-
- return PAM_SUCCESS;
-}
-
-_public_ PAM_EXTERN int pam_sm_open_session(
- pam_handle_t *handle,
- int flags,
- int argc, const char **argv) {
-
- const char *username = NULL;
- struct passwd *pw;
- int r;
- char *buf = NULL;
- int lock_fd = -1;
- bool create_session = true;
- bool debug = false;
- char **controllers = NULL, **reset_controllers = NULL, **c;
- char *cgroup_user_tree = NULL;
-
- assert(handle);
-
- /* pam_syslog(handle, LOG_DEBUG, "pam-systemd initializing"); */
-
- /* Make this a NOP on non-systemd systems */
- if (sd_booted() <= 0)
- return PAM_SUCCESS;
-
- if (parse_argv(handle,
- argc, argv,
- &create_session, NULL, NULL,
- &controllers, &reset_controllers,
- NULL, NULL, &debug) < 0)
- return PAM_SESSION_ERR;
-
- if ((r = get_user_data(handle, &username, &pw)) != PAM_SUCCESS)
- goto finish;
-
- if ((r = cg_get_user_path(&cgroup_user_tree)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to determine user cgroup tree: %s", strerror(-r));
- r = PAM_SYSTEM_ERR;
- goto finish;
- }
-
- if (safe_mkdir(RUNTIME_DIR "/user", 0755, 0, 0) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to create runtime directory: %m");
- r = PAM_SYSTEM_ERR;
- goto finish;
- }
-
- if ((lock_fd = open_file_and_lock(RUNTIME_DIR "/user/.pam-systemd-lock")) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to lock runtime directory: %m");
- r = PAM_SYSTEM_ERR;
- goto finish;
- }
-
- /* Create /run/user/$USER */
- free(buf);
- if (asprintf(&buf, RUNTIME_DIR "/user/%s", username) < 0) {
- r = PAM_BUF_ERR;
- goto finish;
- }
-
- if (safe_mkdir(buf, 0700, pw->pw_uid, pw->pw_gid) < 0) {
- pam_syslog(handle, LOG_WARNING, "Failed to create runtime directory: %m");
- r = PAM_SYSTEM_ERR;
- goto finish;
- } else if ((r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", buf, 0)) != PAM_SUCCESS) {
- pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
- goto finish;
- }
-
- free(buf);
- buf = NULL;
-
- if (create_session) {
- const char *id;
-
- /* Reuse or create XDG session ID */
- if (!(id = pam_getenv(handle, "XDG_SESSION_ID"))) {
- int mode;
-
- if (asprintf(&buf, "%llux", (unsigned long long) get_session_id(&mode)) < 0) {
- r = PAM_BUF_ERR;
- goto finish;
- }
-
- /* To avoid id clashes we add the session id
- * source to our session ids. Note that the
- * session id source might change during
- * runtime, because a filesystem became
- * writable or the system reconfigured. */
- buf[strlen(buf)-1] =
- mode != SESSION_ID_AUDIT ? (char) mode : 0;
-
- if ((r = pam_misc_setenv(handle, "XDG_SESSION_ID", buf, 0)) != PAM_SUCCESS) {
- pam_syslog(handle, LOG_ERR, "Failed to set session id.");
- goto finish;
- }
-
- if (!(id = pam_getenv(handle, "XDG_SESSION_ID"))) {
- pam_syslog(handle, LOG_ERR, "Failed to get session id.");
- r = PAM_SESSION_ERR;
- goto finish;
- }
- }
-
- r = asprintf(&buf, "%s/%s/%s", cgroup_user_tree, username, id);
- } else
- r = asprintf(&buf, "%s/%s/master", cgroup_user_tree, username);
-
- if (r < 0) {
- r = PAM_BUF_ERR;
- goto finish;
- }
-
- if (debug)
- pam_syslog(handle, LOG_DEBUG, "Moving new user session for %s into control group %s.", username, buf);
-
- if ((r = create_user_group(handle, SYSTEMD_CGROUP_CONTROLLER, buf, pw, true, true)) != PAM_SUCCESS)
- goto finish;
-
- /* The additional controllers don't really matter, so we
- * ignore the return value */
- STRV_FOREACH(c, controllers)
- create_user_group(handle, *c, buf, pw, true, false);
-
- STRV_FOREACH(c, reset_controllers)
- reset_group(handle, *c);
-
- r = PAM_SUCCESS;
-
-finish:
- free(buf);
-
- if (lock_fd >= 0)
- close_nointr_nofail(lock_fd);
-
- strv_free(controllers);
- strv_free(reset_controllers);
-
- free(cgroup_user_tree);
-
- return r;
-}
-
-static int session_remains(pam_handle_t *handle, const char *user_path) {
- int r;
- bool remains = false;
- DIR *d;
- char *subgroup;
-
- if ((r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, user_path, &d)) < 0)
- return r;
-
- while ((r = cg_read_subgroup(d, &subgroup)) > 0) {
-
- remains = !streq(subgroup, "master");
- free(subgroup);
-
- if (remains)
- break;
- }
-
- closedir(d);
-
- if (r < 0)
- return r;
-
- return !!remains;
-}
-
static bool check_user_lists(
pam_handle_t *handle,
uid_t uid,
else {
struct passwd *pw;
- if ((pw = pam_modutil_getpwuid(handle, uid)))
+ pw = pam_modutil_getpwuid(handle, uid);
+ if (pw)
name = pw->pw_name;
}
return false;
}
-_public_ PAM_EXTERN int pam_sm_close_session(
+_public_ PAM_EXTERN int pam_sm_open_session(
pam_handle_t *handle,
int flags,
int argc, const char **argv) {
const char *username = NULL;
- bool kill_session = false;
- bool kill_user = false;
- bool debug = false;
- int lock_fd = -1, r;
- char *session_path = NULL, *nosession_path = NULL, *user_path = NULL;
- const char *id;
struct passwd *pw;
- const void *created = NULL;
- char **controllers = NULL, **c, **kill_only_users = NULL, **kill_exclude_users = NULL;
- char *cgroup_user_tree = NULL;
+ bool kill_processes = false, debug = false;
+ char **controllers = NULL, **reset_controllers = NULL, **kill_only_users = NULL, **kill_exclude_users = NULL;
+ int r;
+ DBusError error;
+ uint32_t uid, pid;
+ DBusMessageIter iter;
+ dbus_bool_t kp;
+ const char *id, *object_path, *runtime_path, *service = NULL, *tty = NULL, *display = NULL, *remote_user = NULL, *remote_host = NULL, *seat = NULL, *type;
+ int session_fd = -1;
+ DBusConnection *bus = NULL;
+ DBusMessage *m = NULL, *reply = NULL;
+ dbus_bool_t remote;
assert(handle);
+ dbus_error_init(&error);
+
+ pam_syslog(handle, LOG_ERR, "pam-systemd initializing");
+
/* Make this a NOP on non-systemd systems */
if (sd_booted() <= 0)
return PAM_SUCCESS;
if (parse_argv(handle,
argc, argv,
- NULL, &kill_session, &kill_user,
- &controllers, NULL,
- &kill_only_users, &kill_exclude_users, &debug) < 0)
+ &controllers, &reset_controllers,
+ &kill_processes, &kill_only_users, &kill_exclude_users,
+ &debug) < 0)
return PAM_SESSION_ERR;
- if ((r = get_user_data(handle, &username, &pw)) != PAM_SUCCESS)
+ r = get_user_data(handle, &username, &pw);
+ if (r != PAM_SUCCESS)
goto finish;
- if ((r = cg_get_user_path(&cgroup_user_tree)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to determine user cgroup tree: %s", strerror(-r));
- r = PAM_SYSTEM_ERR;
- goto finish;
- }
+ if (kill_processes)
+ kill_processes = check_user_lists(handle, pw->pw_uid, kill_only_users, kill_exclude_users);
- if ((lock_fd = open_file_and_lock(RUNTIME_DIR "/user/.pam-systemd-lock")) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to lock runtime directory: %m");
- r = PAM_SYSTEM_ERR;
+ bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
+ if (!bus) {
+ pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
+ r = PAM_SESSION_ERR;
goto finish;
}
- /* We are probably still in some session/user dir. Move ourselves out of the way as first step */
- if ((r = cg_attach(SYSTEMD_CGROUP_CONTROLLER, cgroup_user_tree, 0)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to move us away: %s", strerror(-r));
-
- STRV_FOREACH(c, controllers)
- if ((r = cg_attach(*c, cgroup_user_tree, 0)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to move us away in %s hierarchy: %s", *c, strerror(-r));
+ m = dbus_message_new_method_call(
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "CreateSession");
- if (asprintf(&user_path, "%s/%s", cgroup_user_tree, username) < 0) {
+ if (!m) {
+ pam_syslog(handle, LOG_ERR, "Could not allocate create session message.");
r = PAM_BUF_ERR;
goto finish;
}
- pam_get_data(handle, "systemd.created", &created);
-
- if ((id = pam_getenv(handle, "XDG_SESSION_ID")) && created) {
+ uid = pw->pw_uid;
+ pid = getpid();
+
+ pam_get_item(handle, PAM_SERVICE, (const void**) &service);
+ pam_get_item(handle, PAM_XDISPLAY, (const void**) &display);
+ pam_get_item(handle, PAM_TTY, (const void**) &tty);
+ pam_get_item(handle, PAM_RUSER, (const void**) &remote_user);
+ pam_get_item(handle, PAM_RHOST, (const void**) &remote_host);
+
+ if (isempty(tty))
+ service = "";
+ if (isempty(tty))
+ tty = "";
+ if (isempty(display))
+ display = "";
+ if (isempty(remote_user))
+ remote_user = "";
+ if (isempty(remote_host))
+ remote_host = "";
+ seat = "";
+
+ type = !isempty(display) ? "x11" :
+ !isempty(tty) ? "tty" : "other";
+
+ remote = !isempty(remote_host) && !streq(remote_host, "localhost") && !streq(remote_host, "localhost.localdomain");
+
+ if (!dbus_message_append_args(m,
+ DBUS_TYPE_UINT32, &uid,
+ DBUS_TYPE_UINT32, &pid,
+ DBUS_TYPE_STRING, &service,
+ DBUS_TYPE_STRING, &type,
+ DBUS_TYPE_STRING, &seat,
+ DBUS_TYPE_STRING, &tty,
+ DBUS_TYPE_STRING, &display,
+ DBUS_TYPE_BOOLEAN, &remote,
+ DBUS_TYPE_STRING, &remote_user,
+ DBUS_TYPE_STRING, &remote_host,
+ DBUS_TYPE_INVALID)) {
+ pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- if (asprintf(&session_path, "%s/%s/%s", cgroup_user_tree, username, id) < 0 ||
- asprintf(&nosession_path, "%s/%s/master", cgroup_user_tree, username) < 0) {
- r = PAM_BUF_ERR;
- goto finish;
- }
+ dbus_message_iter_init_append(m, &iter);
- if (kill_session && check_user_lists(handle, pw->pw_uid, kill_only_users, kill_exclude_users)) {
- if (debug)
- pam_syslog(handle, LOG_DEBUG, "Killing remaining processes of user session %s of %s.", id, username);
+ r = bus_append_strv_iter(&iter, controllers);
+ if (r < 0) {
+ pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- /* Kill processes in session cgroup, and delete it */
- if ((r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, session_path, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to kill session cgroup: %s", strerror(-r));
- } else {
- if (debug)
- pam_syslog(handle, LOG_DEBUG, "Moving remaining processes of user session %s of %s into control group %s.", id, username, nosession_path);
+ r = bus_append_strv_iter(&iter, reset_controllers);
+ if (r < 0) {
+ pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- /* Migrate processes from session to user
- * cgroup. First, try to create the user group
- * in case it doesn't exist yet. Also, delete
- * the session group. */
- create_user_group(handle, SYSTEMD_CGROUP_CONTROLLER, nosession_path, pw, false, false);
+ kp = kill_processes;
+ if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &kp)) {
+ pam_syslog(handle, LOG_ERR, "Could not attach parameter to message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- if ((r = cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER, session_path, nosession_path, false, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to migrate session cgroup: %s", strerror(-r));
- }
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+ if (!reply) {
+ pam_syslog(handle, LOG_ERR, "Failed to create session: %s", bus_error_message(&error));
+ r = PAM_SESSION_ERR;
+ goto finish;
+ }
- STRV_FOREACH(c, controllers) {
- create_user_group(handle, *c, nosession_path, pw, false, false);
+ if (!dbus_message_get_args(reply, &error,
+ DBUS_TYPE_STRING, &id,
+ DBUS_TYPE_OBJECT_PATH, &object_path,
+ DBUS_TYPE_STRING, &runtime_path,
+ DBUS_TYPE_UNIX_FD, &session_fd,
+ DBUS_TYPE_INVALID)) {
+ pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", bus_error_message(&error));
+ r = PAM_SESSION_ERR;
+ goto finish;
+ }
- if ((r = cg_migrate_recursive(*c, session_path, nosession_path, false, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to migrate session cgroup in hierarchy %s: %s", *c, strerror(-r));
- }
+ r = pam_misc_setenv(handle, "XDG_SESSION_ID", id, 0);
+ if (r != PAM_SUCCESS) {
+ pam_syslog(handle, LOG_ERR, "Failed to set session id.");
+ goto finish;
}
- /* GC user tree */
- cg_trim(SYSTEMD_CGROUP_CONTROLLER, user_path, false);
+ r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", runtime_path, 0);
+ if (r != PAM_SUCCESS) {
+ pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
+ goto finish;
+ }
- if ((r = session_remains(handle, user_path)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to determine whether a session remains: %s", strerror(-r));
+ r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL);
+ if (r != PAM_SUCCESS) {
+ pam_syslog(handle, LOG_ERR, "Failed to install session fd.");
+ return r;
+ }
- /* Kill user processes not attached to any session */
- if (kill_user && r == 0 && check_user_lists(handle, pw->pw_uid, kill_only_users, kill_exclude_users)) {
+ session_fd = -1;
- /* Kill user cgroup */
- if ((r = cg_kill_recursive_and_wait(SYSTEMD_CGROUP_CONTROLLER, user_path, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to kill user cgroup: %s", strerror(-r));
- } else {
+ r = PAM_SUCCESS;
- if ((r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, user_path, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to check user cgroup: %s", strerror(-r));
+finish:
+ strv_free(controllers);
+ strv_free(reset_controllers);
+ strv_free(kill_only_users);
+ strv_free(kill_exclude_users);
- /* Remove user cgroup */
- if (r > 0) {
- if ((r = cg_delete(SYSTEMD_CGROUP_CONTROLLER, user_path)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to delete user cgroup: %s", strerror(-r));
+ dbus_error_free(&error);
- /* If we managed to find somebody, don't cleanup the cgroup. */
- } else if (r == 0)
- r = -EBUSY;
+ if (bus) {
+ dbus_connection_close(bus);
+ dbus_connection_unref(bus);
}
- STRV_FOREACH(c, controllers)
- cg_trim(*c, user_path, true);
-
- if (r >= 0) {
- const char *runtime_dir;
+ if (reply)
+ dbus_message_unref(reply);
- if ((runtime_dir = pam_getenv(handle, "XDG_RUNTIME_DIR")))
- if ((r = rm_rf(runtime_dir, false, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to remove runtime directory: %s", strerror(-r));
- }
+ if (m)
+ dbus_message_unref(m);
- /* pam_syslog(handle, LOG_DEBUG, "pam-systemd done"); */
+ if (session_fd >= 0)
+ close_nointr_nofail(session_fd);
- r = PAM_SUCCESS;
+ return r;
+}
-finish:
- if (lock_fd >= 0)
- close_nointr_nofail(lock_fd);
+_public_ PAM_EXTERN int pam_sm_close_session(
+ pam_handle_t *handle,
+ int flags,
+ int argc, const char **argv) {
- free(session_path);
- free(nosession_path);
- free(user_path);
+ const void *p = NULL;
- strv_free(controllers);
- strv_free(kill_exclude_users);
- strv_free(kill_only_users);
+ pam_get_data(handle, "systemd.session-fd", &p);
- free(cgroup_user_tree);
+ if (p)
+ close_nointr(PTR_TO_INT(p) - 1);
- return r;
+ return PAM_SUCCESS;
}
projects / systemd / commitdiff