#include <sys/file.h>
#include <pwd.h>
#include <endian.h>
+#include <sys/capability.h>
#include <security/pam_modules.h>
#include <security/_pam_macros.h>
#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"
+#include "socket-util.h"
static int parse_argv(pam_handle_t *handle,
int argc, const char **argv,
- bool *create_session,
- bool *kill_session,
- bool *kill_user,
- bool *keep_root,
- char ***controllers) {
+ char ***controllers,
+ char ***reset_controllers,
+ bool *kill_processes,
+ char ***kill_only_users,
+ char ***kill_exclude_users,
+ bool *debug) {
unsigned i;
- bool controller_set = false;
assert(argc >= 0);
assert(argc == 0 || argv);
for (i = 0; i < (unsigned) argc; i++) {
int k;
- if (startswith(argv[i], "create-session=")) {
- if ((k = parse_boolean(argv[i] + 15)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to parse create-session= argument.");
+ if (startswith(argv[i], "kill-session-processes=")) {
+ if ((k = parse_boolean(argv[i] + 23)) < 0) {
+ pam_syslog(handle, LOG_ERR, "Failed to parse kill-session-processes= 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;
-
- } else if (startswith(argv[i], "keep-root=")) {
- if ((k = parse_boolean(argv[i] + 10)) < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to parse keep-root= argument.");
- return k;
- }
-
- if (keep_root)
- *keep_root = k;
+ if (kill_processes)
+ *kill_processes = k;
} else if (startswith(argv[i], "controllers=")) {
*controllers = l;
}
- controller_set = true;
-
- } else {
- pam_syslog(handle, LOG_ERR, "Unknown parameter '%s'.", argv[i]);
- return -EINVAL;
- }
- }
-
-#if 0
- if (!controller_set && controllers) {
- char **l;
-
- if (!(l = strv_new("cpu", NULL))) {
- pam_syslog(handle, LOG_ERR, "Out of memory");
- return -ENOMEM;
- }
-
- *controllers = l;
- }
-#endif
-
- if (controllers)
- strv_remove(*controllers, "name=systemd");
-
- if (kill_session && *kill_session && kill_user)
- *kill_user = true;
-
- return 0;
-}
-
-static int open_file_and_lock(const char *fn) {
- int fd;
+ } else if (startswith(argv[i], "reset-controllers=")) {
- 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)
- return -errno;
+ if (reset_controllers) {
+ char **l;
- return fd;
-}
+ if (!(l = strv_split(argv[i] + 18, ","))) {
+ pam_syslog(handle, LOG_ERR, "Out of memory.");
+ return -ENOMEM;
+ }
-enum {
- SESSION_ID_AUDIT = 'a',
- SESSION_ID_COUNTER = 'c',
- SESSION_ID_RANDOM = 'r'
-};
+ strv_free(*reset_controllers);
+ *reset_controllers = l;
+ }
-static uint64_t get_session_id(int *mode) {
- char *s;
- int fd;
+ } else if (startswith(argv[i], "kill-only-users=")) {
- assert(mode);
+ if (kill_only_users) {
+ char **l;
- /* First attempt: let's use the session ID of the audit
- * system, if it is available. */
- if (read_one_line_file("/proc/self/sessionid", &s) >= 0) {
- uint32_t u;
- int r;
+ if (!(l = strv_split(argv[i] + 16, ","))) {
+ pam_syslog(handle, LOG_ERR, "Out of memory.");
+ return -ENOMEM;
+ }
- r = safe_atou32(s, &u);
- free(s);
+ strv_free(*kill_only_users);
+ *kill_only_users = l;
+ }
- if (r >= 0 && u != (uint32_t) -1 && u > 0) {
- *mode = SESSION_ID_AUDIT;
- return (uint64_t) u;
- }
- }
+ } else if (startswith(argv[i], "kill-exclude-users=")) {
- /* 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;
+ if (kill_exclude_users) {
+ char **l;
- /* We do a bit of endianess swapping here, just to be
- * sure. /var should be machine specific anyway, and
- * /var/run 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 (!(l = strv_split(argv[i] + 19, ","))) {
+ pam_syslog(handle, LOG_ERR, "Out of memory.");
+ return -ENOMEM;
+ }
- if (loop_read(fd, &counter, sizeof(counter), false) != sizeof(counter))
- counter = 1;
- else
- counter = le64toh(counter) + 1;
+ strv_free(*kill_exclude_users);
+ *kill_exclude_users = l;
+ }
- if (lseek(fd, 0, SEEK_SET) == 0) {
- uint64_t swapped = htole64(counter);
+ } else if (startswith(argv[i], "debug=")) {
+ if ((k = parse_boolean(argv[i] + 6)) < 0) {
+ pam_syslog(handle, LOG_ERR, "Failed to parse debug= argument.");
+ return k;
+ }
- r = loop_write(fd, &swapped, sizeof(swapped), false);
+ if (debug)
+ *debug = k;
- if (r != sizeof(swapped))
- r = -EIO;
- } else
- r = -errno;
+ } else if (startswith(argv[i], "create-session=") ||
+ startswith(argv[i], "kill-user=")) {
- close_nointr_nofail(fd);
+ pam_syslog(handle, LOG_WARNING, "Option %s not supported anymore, ignoring.", argv[i]);
- if (r >= 0) {
- *mode = SESSION_ID_COUNTER;
- return counter;
+ } else {
+ pam_syslog(handle, LOG_ERR, "Unknown parameter '%s'.", argv[i]);
+ return -EINVAL;
}
}
- *mode = SESSION_ID_RANDOM;
-
- /* Last attempt, pick a random value */
- return (uint64_t) random_ull();
+ return 0;
}
+
static int get_user_data(
pam_handle_t *handle,
const char **ret_username,
assert(ret_username);
assert(ret_pw);
- if (read_one_line_file("/proc/self/loginuid", &s) >= 0) {
- uint32_t u;
+ if (have_effective_cap(CAP_AUDIT_CONTROL) > 0) {
+ /* Only use audit login uid if we are executed with
+ * sufficient capabilities so that pam_loginuid could
+ * do its job. If we are lacking the CAP_AUDIT_CONTROL
+ * capabality we most likely are being run in a
+ * container and /proc/self/loginuid is useless since
+ * it probably contains a uid of the host system. */
+
+ if (read_one_line_file("/proc/self/loginuid", &s) >= 0) {
+ uid_t uid;
- r = safe_atou32(s, &u);
- free(s);
+ r = parse_uid(s, &uid);
+ free(s);
- if (r >= 0 && u != (uint32_t) -1 && u > 0) {
- have_loginuid = true;
- pw = pam_modutil_getpwuid(handle, u);
+ if (r >= 0 && uid != (uint32_t) -1) {
+ have_loginuid = true;
+ pw = pam_modutil_getpwuid(handle, uid);
+ }
}
}
return PAM_SUCCESS;
}
-static int create_user_group(
+static bool check_user_lists(
pam_handle_t *handle,
- const char *controller,
- const char *group,
- struct passwd *pw,
- bool attach,
- bool remember) {
+ uid_t uid,
+ char **kill_only_users,
+ char **kill_exclude_users) {
- int r;
+ const char *name = NULL;
+ char **l;
assert(handle);
- assert(group);
- if (attach)
- r = cg_create_and_attach(controller, group, 0);
- else
- r = cg_create(controller, group);
+ if (uid == 0)
+ name = "root"; /* Avoid obvious NSS requests, to suppress network traffic */
+ else {
+ struct passwd *pw;
- if (r < 0) {
- pam_syslog(handle, LOG_ERR, "Failed to create cgroup: %s", strerror(-r));
- return PAM_SESSION_ERR;
+ pw = pam_modutil_getpwuid(handle, uid);
+ if (pw)
+ name = pw->pw_name;
}
- 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;
- }
+ STRV_FOREACH(l, kill_exclude_users) {
+ uid_t u;
+
+ if (parse_uid(*l, &u) >= 0)
+ if (u == uid)
+ return false;
+
+ if (name && streq(name, *l))
+ return false;
}
- 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;
+ if (strv_isempty(kill_only_users))
+ return true;
+
+ STRV_FOREACH(l, kill_only_users) {
+ uid_t u;
+
+ if (parse_uid(*l, &u) >= 0)
+ if (u == uid)
+ return true;
+
+ if (name && streq(name, *l))
+ return true;
}
- return PAM_SUCCESS;
+ return false;
+}
+
+static int get_seat_from_display(const char *display, const char **seat, uint32_t *vtnr) {
+ char *p = NULL;
+ int r;
+ int fd;
+ union sockaddr_union sa;
+ struct ucred ucred;
+ socklen_t l;
+ char *tty;
+ int v;
+
+ assert(display);
+ assert(seat);
+ assert(vtnr);
+
+ /* We deduce the X11 socket from the display name, then use
+ * SO_PEERCRED to determine the X11 server process, ask for
+ * the controlling tty of that and if it's a VC then we know
+ * the seat and the virtual terminal. Sounds ugly, is only
+ * semi-ugly. */
+
+ r = socket_from_display(display, &p);
+ if (r < 0)
+ return r;
+
+ fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
+ if (fd < 0) {
+ free(p);
+ return -errno;
+ }
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, p, sizeof(sa.un.sun_path)-1);
+ free(p);
+
+ if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ l = sizeof(ucred);
+ r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l);
+ close_nointr_nofail(fd);
+
+ if (r < 0)
+ return -errno;
+
+ r = get_ctty(ucred.pid, NULL, &tty);
+ if (r < 0)
+ return r;
+
+ v = vtnr_from_tty(tty);
+ free(tty);
+
+ if (v < 0)
+ return v;
+ else if (v == 0)
+ return -ENOENT;
+
+ *seat = "seat0";
+ *vtnr = (uint32_t) v;
+
+ return 0;
}
_public_ PAM_EXTERN int pam_sm_open_session(
int flags,
int argc, const char **argv) {
- const char *username = NULL;
struct passwd *pw;
+ bool kill_processes = false, debug = false;
+ const char *username, *id, *object_path, *runtime_path, *service = NULL, *tty = NULL, *display = NULL, *remote_user = NULL, *remote_host = NULL, *seat = NULL, *type, *cvtnr = NULL;
+ char **controllers = NULL, **reset_controllers = NULL, **kill_only_users = NULL, **kill_exclude_users = NULL;
+ DBusError error;
+ uint32_t uid, pid;
+ DBusMessageIter iter;
+ dbus_bool_t kp;
+ int session_fd = -1;
+ DBusConnection *bus = NULL;
+ DBusMessage *m = NULL, *reply = NULL;
+ dbus_bool_t remote;
int r;
- char *buf = NULL;
- int lock_fd = -1;
- bool create_session = true;
- char **controllers = NULL, **c;
+ uint32_t vtnr = 0;
assert(handle);
- /* pam_syslog(handle, LOG_DEBUG, "pam-systemd initializing"); */
+ dbus_error_init(&error);
+
+ /* pam_syslog(handle, LOG_INFO, "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, NULL, &controllers) < 0)
- return PAM_SESSION_ERR;
-
- if ((r = get_user_data(handle, &username, &pw)) != PAM_SUCCESS)
- 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;
+ if (parse_argv(handle,
+ argc, argv,
+ &controllers, &reset_controllers,
+ &kill_processes, &kill_only_users, &kill_exclude_users,
+ &debug) < 0) {
+ r = PAM_SESSION_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;
+ r = get_user_data(handle, &username, &pw);
+ if (r != PAM_SUCCESS)
goto finish;
- }
- /* Create /var/run/$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;
- }
+ /* Make sure we don't enter a loop by talking to
+ * systemd-logind when it is actually waiting for the
+ * background to finish start-up. If the service is
+ * "systemd-shared" we simply set XDG_RUNTIME_DIR and
+ * leave. */
- free(buf);
- buf = NULL;
+ pam_get_item(handle, PAM_SERVICE, (const void**) &service);
+ if (streq_ptr(service, "systemd-shared")) {
+ char *p, *rt = NULL;
- if (create_session) {
- const char *id;
+ if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) pw->pw_uid) < 0) {
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- /* Reuse or create XDG session ID */
- if (!(id = pam_getenv(handle, "XDG_SESSION_ID"))) {
- int mode;
+ r = parse_env_file(p, NEWLINE,
+ "RUNTIME", &rt,
+ NULL);
+ free(p);
- 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 < 0 && r != -ENOENT) {
+ r = PAM_SESSION_ERR;
+ free(rt);
+ goto finish;
+ }
- 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 (rt) {
+ r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", rt, 0);
+ free(rt);
- if (!(id = pam_getenv(handle, "XDG_SESSION_ID"))) {
- pam_syslog(handle, LOG_ERR, "Failed to get session id.");
- r = PAM_SESSION_ERR;
+ if (r != PAM_SUCCESS) {
+ pam_syslog(handle, LOG_ERR, "Failed to set runtime dir.");
goto finish;
}
}
- r = asprintf(&buf, "/user/%s/%s", username, id);
- } else
- r = asprintf(&buf, "/user/%s/master", username);
-
- if (r < 0) {
- r = PAM_BUF_ERR;
+ r = PAM_SUCCESS;
goto finish;
}
- pam_syslog(handle, LOG_INFO, "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);
-
- r = PAM_SUCCESS;
-
-finish:
- free(buf);
+ if (kill_processes)
+ kill_processes = check_user_lists(handle, pw->pw_uid, kill_only_users, kill_exclude_users);
- if (lock_fd >= 0)
- close_nointr_nofail(lock_fd);
+ dbus_connection_set_change_sigpipe(FALSE);
- strv_free(controllers);
-
- 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;
+ 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;
}
- closedir(d);
-
- if (r < 0)
- return r;
-
- return !!remains;
-}
+ m = dbus_message_new_method_call(
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "CreateSession");
-_public_ PAM_EXTERN int pam_sm_close_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 keep_root = true;
- 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;
+ if (!m) {
+ pam_syslog(handle, LOG_ERR, "Could not allocate create session message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
- assert(handle);
+ uid = pw->pw_uid;
+ pid = getpid();
+
+ 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);
+ seat = pam_getenv(handle, "LOGIN_SEAT");
+ cvtnr = pam_getenv(handle, "LOGIN_VTNR");
+
+ service = strempty(service);
+ tty = strempty(tty);
+ display = strempty(display);
+ remote_user = strempty(remote_user);
+ remote_host = strempty(remote_host);
+ seat = strempty(seat);
+
+ if (strchr(tty, ':')) {
+ /* A tty with a colon is usually an X11 display, place
+ * there to show up in utmp. We rearrange things and
+ * don't pretend that an X display was a tty */
+
+ if (isempty(display))
+ display = tty;
+ tty = "";
+ }
- /* Make this a NOP on non-systemd systems */
- if (sd_booted() <= 0)
- return PAM_SUCCESS;
+ if (!isempty(cvtnr))
+ safe_atou32(cvtnr, &vtnr);
+
+ if (!isempty(display) && isempty(seat) && vtnr <= 0)
+ get_seat_from_display(display, &seat, &vtnr);
+
+ 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_UINT32, &vtnr,
+ 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 (parse_argv(handle, argc, argv, NULL, &kill_session, &kill_user, &keep_root, &controllers) < 0)
- return PAM_SESSION_ERR;
+ dbus_message_iter_init_append(m, &iter);
- if ((r = get_user_data(handle, &username, &pw)) != PAM_SUCCESS)
+ 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;
+ }
- 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;
+ 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;
}
- /* 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, "/user", 0)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to move us away: %s", strerror(-r));
-
- STRV_FOREACH(c, controllers)
- if ((r = cg_attach(*c, "/user", 0)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to move us away in %s hierarchy: %s", *c, strerror(-r));
-
- if (asprintf(&user_path, "/user/%s", username) < 0) {
+ 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;
}
- pam_get_data(handle, "systemd.created", &created);
-
- if ((id = pam_getenv(handle, "XDG_SESSION_ID")) && created) {
-
- if (asprintf(&session_path, "/user/%s/%s", username, id) < 0 ||
- asprintf(&nosession_path, "/user/%s/master", username) < 0) {
- r = PAM_BUF_ERR;
- goto finish;
- }
-
- if (kill_session && (pw->pw_uid != 0 || !keep_root)) {
- pam_syslog(handle, LOG_INFO, "Killing remaining processes of user session %s of %s.", id, username);
-
- /* 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 {
- pam_syslog(handle, LOG_INFO, "Moving remaining processes of user session %s of %s into control group %s.", id, username, nosession_path);
+ 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;
+ }
- /* 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);
+ 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(SYSTEMD_CGROUP_CONTROLLER, session_path, nosession_path, false, true)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to migrate session cgroup: %s", 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;
+ }
- STRV_FOREACH(c, controllers) {
- create_user_group(handle, *c, nosession_path, pw, false, 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 = 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));
+ if (session_fd >= 0) {
+ 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;
}
}
- /* GC user tree */
- cg_trim(SYSTEMD_CGROUP_CONTROLLER, user_path, false);
-
- if ((r = session_remains(handle, user_path)) < 0)
- pam_syslog(handle, LOG_ERR, "Failed to determine whether a session remains: %s", strerror(-r));
+ session_fd = -1;
- /* Kill user processes not attached to any session */
- if (kill_user && r == 0 && (pw->pw_uid != 0 || !keep_root)) {
-
- /* 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 (m)
+ dbus_message_unref(m);
- 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 (session_fd >= 0)
+ close_nointr_nofail(session_fd);
- /* pam_syslog(handle, LOG_DEBUG, "pam-systemd done"); */
+ return r;
+}
- r = PAM_SUCCESS;
+_public_ PAM_EXTERN int pam_sm_close_session(
+ pam_handle_t *handle,
+ int flags,
+ int argc, const char **argv) {
-finish:
- if (lock_fd >= 0)
- close_nointr_nofail(lock_fd);
+ const void *p = NULL;
- free(session_path);
- free(nosession_path);
- free(user_path);
+ pam_get_data(handle, "systemd.session-fd", &p);
- strv_free(controllers);
+ if (p)
+ close_nointr(PTR_TO_INT(p) - 1);
- return r;
+ return PAM_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff