+
+_public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) {
+ char *p, *s = NULL, *t = NULL, **a = NULL;
+ uid_t *b = NULL;
+ unsigned n = 0;
+ int r;
+
+ if (!seat)
+ return -EINVAL;
+
+ if (!sessions && !uids)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/seats/", seat);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE,
+ "SESSIONS", &s,
+ "ACTIVE_SESSIONS", &t,
+ NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ free(t);
+ return r;
+ }
+
+ if (sessions && s) {
+ a = strv_split(s, " ");
+ if (!a) {
+ free(s);
+ free(t);
+ return -ENOMEM;
+ }
+ }
+
+ free(s);
+
+ if (uids && t) {
+ char *w, *state;
+ size_t l;
+ unsigned i = 0;
+
+ FOREACH_WORD(w, l, t, state)
+ n++;
+
+ b = new(uid_t, n);
+ if (!b) {
+ strv_free(a);
+ return -ENOMEM;
+ }
+
+ FOREACH_WORD(w, l, t, state) {
+ char *k;
+
+ k = strndup(w, l);
+ if (!k) {
+ free(t);
+ free(b);
+ return -ENOMEM;
+ }
+
+ r = parse_uid(k, b + i);
+ free(k);
+ if (r < 0)
+ continue;
+
+ i++;
+ }
+ }
+
+ free(t);
+
+ if (sessions)
+ *sessions = a;
+
+ if (uids)
+ *uids = b;
+
+ if (n_uids)
+ *n_uids = n;
+
+ return 0;
+}
+
+_public_ int sd_get_seats(char ***seats) {
+
+ if (!seats)
+ return -EINVAL;
+
+ return get_files_in_directory("/run/systemd/seats/", seats);
+}
+
+_public_ int sd_get_sessions(char ***sessions) {
+
+ if (!sessions)
+ return -EINVAL;
+
+ return get_files_in_directory("/run/systemd/sessions/", sessions);
+}
+
+_public_ int sd_get_uids(uid_t **users) {
+ DIR *d;
+ int r = 0;
+ unsigned n = 0;
+ uid_t *l = NULL;
+
+ if (!users)
+ return -EINVAL;
+
+ d = opendir("/run/systemd/users/");
+ for (;;) {
+ struct dirent buffer, *de;
+ int k;
+ uid_t uid;
+
+ k = readdir_r(d, &buffer, &de);
+ if (k != 0) {
+ r = -k;
+ goto finish;
+ }
+
+ if (!de)
+ break;
+
+ dirent_ensure_type(d, de);
+
+ if (!dirent_is_file(de))
+ continue;
+
+ k = parse_uid(de->d_name, &uid);
+ if (k < 0)
+ continue;
+
+ if ((unsigned) r >= n) {
+ uid_t *t;
+
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(uid_t) * n);
+ if (!t) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ l = t;
+ }
+
+ assert((unsigned) r < n);
+ l[r++] = uid;
+ }
+
+finish:
+ if (d)
+ closedir(d);
+
+ if (r >= 0)
+ *users = l;
+ else
+ free(l);
+
+ return r;
+}
+
+static inline int MONITOR_TO_FD(sd_login_monitor *m) {
+ return (int) (unsigned long) m - 1;
+}
+
+static inline sd_login_monitor* FD_TO_MONITOR(int fd) {
+ return (sd_login_monitor*) (unsigned long) (fd + 1);
+}
+
+_public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) {
+ const char *path;
+ int fd, k;
+ bool good = false;
+
+ if (!m)
+ return -EINVAL;
+
+ fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
+ if (fd < 0)
+ return errno;
+
+ if (!category || streq(category, "seat")) {
+ k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE);
+ if (k < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ good = true;
+ }
+
+ if (!category || streq(category, "session")) {
+ k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE);
+ if (k < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ good = true;
+ }
+
+ if (!category || streq(category, "uid")) {
+ k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE);
+ if (k < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ good = true;
+ }
+
+ if (!good) {
+ close_nointr(fd);
+ return -EINVAL;
+ }
+
+ *m = FD_TO_MONITOR(fd);
+ return 0;
+}
+
+_public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) {
+ int fd;
+
+ if (!m)
+ return NULL;
+
+ fd = MONITOR_TO_FD(m);
+ close_nointr(fd);
+
+ return NULL;
+}
+
+_public_ int sd_login_monitor_flush(sd_login_monitor *m) {
+
+ if (!m)
+ return -EINVAL;
+
+ return flush_fd(MONITOR_TO_FD(m));
+}
+
+_public_ int sd_login_monitor_get_fd(sd_login_monitor *m) {
+
+ if (!m)
+ return -EINVAL;
+
+ return MONITOR_TO_FD(m);
+}
~ianmdlvl / elogind.git / commitdiff