X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind-user.c;h=1f6fffff6bc7bcbd5b63fe95048c47ca3be49270;hp=9bbe879571e4c838214478e77e64e24dcdf9f0f3;hb=e777ddfd71f3b2d3217ffe74f287388832915d0b;hpb=1c231f56482546725c4dbd3303f70300bd3c63e9

diff --git a/src/login/logind-user.c b/src/login/logind-user.c
index 9bbe87957..1f6fffff6 100644
--- a/src/login/logind-user.c
+++ b/src/login/logind-user.c
@@ -26,8 +26,8 @@
 
 #include "util.h"
 #include "mkdir.h"
+#include "rm-rf.h"
 #include "hashmap.h"
-#include "strv.h"
 #include "fileio.h"
 #include "path-util.h"
 #include "special.h"
@@ -35,7 +35,9 @@
 #include "bus-util.h"
 #include "bus-error.h"
 #include "conf-parser.h"
+#include "clean-ipc.h"
 #include "logind-user.h"
+#include "smack-util.h"
 
 User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
         User *u;
@@ -51,10 +53,10 @@ User* user_new(Manager *m, uid_t uid, gid_t gid, const char *name) {
         if (!u->name)
                 goto fail;
 
-        if (asprintf(&u->state_file, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
+        if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0)
                 goto fail;
 
-        if (hashmap_put(m->users, ULONG_TO_PTR((unsigned long) uid), u) < 0)
+        if (hashmap_put(m->users, UID_TO_PTR(uid), u) < 0)
                 goto fail;
 
         u->manager = m;
@@ -80,22 +82,9 @@ void user_free(User *u) {
         while (u->sessions)
                 session_free(u->sessions);
 
-        if (u->slice) {
-                hashmap_remove(u->manager->user_units, u->slice);
-                free(u->slice);
-        }
-
-        if (u->service) {
-                hashmap_remove(u->manager->user_units, u->service);
-                free(u->service);
-        }
-
-        free(u->slice_job);
-        free(u->service_job);
-
         free(u->runtime_path);
 
-        hashmap_remove(u->manager->users, ULONG_TO_PTR((unsigned long) u->uid));
+        hashmap_remove(u->manager->users, UID_TO_PTR(u->uid));
 
         free(u->name);
         free(u->state_file);
@@ -133,16 +122,6 @@ int user_save(User *u) {
         if (u->runtime_path)
                 fprintf(f, "RUNTIME=%s\n", u->runtime_path);
 
-        if (u->service)
-                fprintf(f, "SERVICE=%s\n", u->service);
-        if (u->service_job)
-                fprintf(f, "SERVICE_JOB=%s\n", u->service_job);
-
-        if (u->slice)
-                fprintf(f, "SLICE=%s\n", u->slice);
-        if (u->slice_job)
-                fprintf(f, "SLICE_JOB=%s\n", u->slice_job);
-
         if (u->display)
                 fprintf(f, "DISPLAY=%s\n", u->display->id);
 
@@ -250,7 +229,7 @@ int user_save(User *u) {
 
 finish:
         if (r < 0)
-                log_error("Failed to save user data %s: %s", u->state_file, strerror(-r));
+                log_error_errno(r, "Failed to save user data %s: %m", u->state_file);
 
         return r;
 }
@@ -264,10 +243,6 @@ int user_load(User *u) {
 
         r = parse_env_file(u->state_file, NEWLINE,
                            "RUNTIME",     &u->runtime_path,
-                           "SERVICE",     &u->service,
-                           "SERVICE_JOB", &u->service_job,
-                           "SLICE",       &u->slice,
-                           "SLICE_JOB",   &u->slice_job,
                            "DISPLAY",     &display,
                            "REALTIME",    &realtime,
                            "MONOTONIC",   &monotonic,
@@ -276,7 +251,7 @@ int user_load(User *u) {
                 if (r == -ENOENT)
                         return 0;
 
-                log_error("Failed to read %s: %s", u->state_file, strerror(-r));
+                log_error_errno(r, "Failed to read %s: %m", u->state_file);
                 return r;
         }
 
@@ -308,10 +283,8 @@ static int user_mkdir_runtime_path(User *u) {
         assert(u);
 
         r = mkdir_safe_label("/run/user", 0755, 0, 0);
-        if (r < 0) {
-                log_error("Failed to create /run/user: %s", strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to create /run/user: %m");
 
         if (!u->runtime_path) {
                 if (asprintf(&p, "/run/user/" UID_FMT, u->uid) < 0)
@@ -322,93 +295,48 @@ static int user_mkdir_runtime_path(User *u) {
         if (path_is_mount_point(p, false) <= 0) {
                 _cleanup_free_ char *t = NULL;
 
-                mkdir(p, 0700);
+                (void) mkdir(p, 0700);
 
-                if (asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size) < 0) {
+                if (mac_smack_use())
+                        r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
+                else
+                        r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size);
+                if (r < 0) {
                         r = log_oom();
                         goto fail;
                 }
 
                 r = mount("tmpfs", p, "tmpfs", MS_NODEV|MS_NOSUID, t);
                 if (r < 0) {
-                        log_error("Failed to mount per-user tmpfs directory %s: %s", p, strerror(-r));
-                        goto fail;
-                }
-        }
-
-        u->runtime_path = p;
-        return 0;
-
-fail:
-        free(p);
-        u->runtime_path = NULL;
-        return r;
-}
-
-static int user_start_slice(User *u) {
-        char *job;
-        int r;
-
-        assert(u);
-
-        if (!u->slice) {
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-                char lu[DECIMAL_STR_MAX(unsigned long) + 1], *slice;
-                sprintf(lu, "%lu", (unsigned long) u->uid);
-
-                r = build_subslice(SPECIAL_USER_SLICE, lu, &slice);
-                if (r < 0)
-                        return r;
+                        if (errno != EPERM) {
+                                r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", p);
+                                goto fail;
+                        }
 
-                r = manager_start_unit(u->manager, slice, &error, &job);
-                if (r < 0) {
-                        log_error("Failed to start user slice: %s", bus_error_message(&error, r));
-                        free(slice);
-                } else {
-                        u->slice = slice;
+                        /* Lacking permissions, maybe
+                         * CAP_SYS_ADMIN-less container? In this case,
+                         * just use a normal directory. */
 
-                        free(u->slice_job);
-                        u->slice_job = job;
+                        r = chmod_and_chown(p, 0700, u->uid, u->gid);
+                        if (r < 0) {
+                                log_error_errno(r, "Failed to change runtime directory ownership and mode: %m");
+                                goto fail;
+                        }
                 }
         }
 
-        if (u->slice)
-                hashmap_put(u->manager->user_units, u->slice, u);
-
+        u->runtime_path = p;
         return 0;
-}
-
-static int user_start_service(User *u) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        char *job;
-        int r;
-
-        assert(u);
 
-        if (!u->service) {
-                char lu[DECIMAL_STR_MAX(unsigned long) + 1], *service;
-                sprintf(lu, "%lu", (unsigned long) u->uid);
-
-                service = unit_name_build("user", lu, ".service");
-                if (!service)
-                        return log_oom();
-
-                r = manager_start_unit(u->manager, service, &error, &job);
-                if (r < 0) {
-                        log_error("Failed to start user service: %s", bus_error_message(&error, r));
-                        free(service);
-                } else {
-                        u->service = service;
-
-                        free(u->service_job);
-                        u->service_job = job;
-                }
+fail:
+        if (p) {
+                /* Try to clean up, but ignore errors */
+                (void) rmdir(p);
+                free(p);
         }
 
-        if (u->service)
-                hashmap_put(u->manager->user_units, u->service, u);
-
-        return 0;
+        u->runtime_path = NULL;
+        return r;
 }
 
 int user_start(User *u) {
@@ -426,16 +354,6 @@ int user_start(User *u) {
         if (r < 0)
                 return r;
 
-        /* Create cgroup */
-        r = user_start_slice(u);
-        if (r < 0)
-                return r;
-
-        /* Spawn user systemd */
-        r = user_start_service(u);
-        if (r < 0)
-                return r;
-
         if (!dual_timestamp_is_set(&u->timestamp))
                 dual_timestamp_get(&u->timestamp);
 
@@ -449,50 +367,6 @@ int user_start(User *u) {
         return 0;
 }
 
-static int user_stop_slice(User *u) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        char *job;
-        int r;
-
-        assert(u);
-
-        if (!u->slice)
-                return 0;
-
-        r = manager_stop_unit(u->manager, u->slice, &error, &job);
-        if (r < 0) {
-                log_error("Failed to stop user slice: %s", bus_error_message(&error, r));
-                return r;
-        }
-
-        free(u->slice_job);
-        u->slice_job = job;
-
-        return r;
-}
-
-static int user_stop_service(User *u) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        char *job;
-        int r;
-
-        assert(u);
-
-        if (!u->service)
-                return 0;
-
-        r = manager_stop_unit(u->manager, u->service, &error, &job);
-        if (r < 0) {
-                log_error("Failed to stop user service: %s", bus_error_message(&error, r));
-                return r;
-        }
-
-        free(u->service_job);
-        u->service_job = job;
-
-        return r;
-}
-
 static int user_remove_runtime_path(User *u) {
         int r;
 
@@ -501,16 +375,20 @@ static int user_remove_runtime_path(User *u) {
         if (!u->runtime_path)
                 return 0;
 
-        r = rm_rf(u->runtime_path, false, false, false);
+        r = rm_rf(u->runtime_path, 0);
         if (r < 0)
-                log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+                log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
 
-        if (umount2(u->runtime_path, MNT_DETACH) < 0)
-                log_error("Failed to unmount user runtime directory %s: %m", u->runtime_path);
+        /* Ignore cases where the directory isn't mounted, as that's
+         * quite possible, if we lacked the permissions to mount
+         * something */
+        r = umount2(u->runtime_path, MNT_DETACH);
+        if (r < 0 && errno != EINVAL && errno != ENOENT)
+                log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path);
 
-        r = rm_rf(u->runtime_path, false, true, false);
+        r = rm_rf(u->runtime_path, REMOVE_ROOT);
         if (r < 0)
-                log_error("Failed to remove runtime directory %s: %s", u->runtime_path, strerror(-r));
+                log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path);
 
         free(u->runtime_path);
         u->runtime_path = NULL;
@@ -535,16 +413,6 @@ int user_stop(User *u, bool force) {
                         r = k;
         }
 
-        /* Kill systemd */
-        k = user_stop_service(u);
-        if (k < 0)
-                r = k;
-
-        /* Kill cgroup */
-        k = user_stop_slice(u);
-        if (k < 0)
-                r = k;
-
         u->stopping = true;
 
         user_save(u);
@@ -572,6 +440,13 @@ int user_finalize(User *u) {
         if (k < 0)
                 r = k;
 
+        /* Clean SysV + POSIX IPC objects */
+        if (u->manager->remove_ipc) {
+                k = clean_ipc(u->uid);
+                if (k < 0)
+                        r = k;
+        }
+
         unlink(u->state_file);
         user_add_to_gc_queue(u);
 
@@ -627,7 +502,7 @@ int user_check_linger_file(User *u) {
         if (!cc)
                 return -ENOMEM;
 
-        p = strappenda("/var/lib/systemd/linger/", cc);
+        p = strjoina("/var/lib/systemd/linger/", cc);
 
         return access(p, F_OK) >= 0;
 }
@@ -644,12 +519,6 @@ bool user_check_gc(User *u, bool drop_not_started) {
         if (user_check_linger_file(u) > 0)
                 return true;
 
-        if (u->slice_job && manager_job_is_active(u->manager, u->slice_job))
-                return true;
-
-        if (u->service_job && manager_job_is_active(u->manager, u->service_job))
-                return true;
-
         return false;
 }
 
@@ -671,9 +540,6 @@ UserState user_get_state(User *u) {
         if (u->stopping)
                 return USER_CLOSING;
 
-        if (u->slice_job || u->service_job)
-                return USER_OPENING;
-
         if (u->sessions) {
                 bool all_closing = true;
 
@@ -697,12 +563,68 @@ UserState user_get_state(User *u) {
 }
 
 int user_kill(User *u, int signo) {
+        Session *s;
+        int res = 0;
+
+        assert(u);
+
+        LIST_FOREACH(sessions_by_user, s, u->sessions) {
+                int r = session_kill(s, KILL_ALL, signo);
+                if (res == 0 && r < 0)
+                        res = r;
+        }
+
+        return res;
+}
+
+void user_elect_display(User *u) {
+        Session *graphical = NULL, *text = NULL, *other = NULL, *s;
+
         assert(u);
 
-        if (!u->slice)
-                return -ESRCH;
+        /* This elects a primary session for each user, which we call
+         * the "display". We try to keep the assignment stable, but we
+         * "upgrade" to better choices. */
+
+        LIST_FOREACH(sessions_by_user, s, u->sessions) {
+
+                if (s->class != SESSION_USER)
+                        continue;
+
+                if (s->stopping)
+                        continue;
+
+                if (SESSION_TYPE_IS_GRAPHICAL(s->type))
+                        graphical = s;
+                else if (s->type == SESSION_TTY)
+                        text = s;
+                else
+                        other = s;
+        }
+
+        if (graphical &&
+            (!u->display ||
+             u->display->class != SESSION_USER ||
+             u->display->stopping ||
+             !SESSION_TYPE_IS_GRAPHICAL(u->display->type))) {
+                u->display = graphical;
+                return;
+        }
+
+        if (text &&
+            (!u->display ||
+             u->display->class != SESSION_USER ||
+             u->display->stopping ||
+             u->display->type != SESSION_TTY)) {
+                u->display = text;
+                return;
+        }
 
-        return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL);
+        if (other &&
+            (!u->display ||
+             u->display->class != SESSION_USER ||
+             u->display->stopping))
+                u->display = other;
 }
 
 static const char* const user_state_table[_USER_STATE_MAX] = {