1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/inotify.h>
29 #include "cgroup-util.h"
35 _public_ int sd_pid_get_session(pid_t pid, char **session) {
42 return cg_pid_get_session(pid, session);
45 _public_ int sd_pid_get_unit(pid_t pid, char **unit) {
52 return cg_pid_get_unit(pid, unit);
55 _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
62 return cg_pid_get_user_unit(pid, unit);
65 _public_ int sd_pid_get_machine_name(pid_t pid, char **name) {
72 return cg_pid_get_machine_name(pid, name);
75 _public_ int sd_pid_get_slice(pid_t pid, char **slice) {
82 return cg_pid_get_slice(pid, slice);
85 _public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
93 return cg_pid_get_owner_uid(pid, uid);
96 _public_ int sd_uid_get_state(uid_t uid, char**state) {
103 if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
106 r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
111 s = strdup("offline");
127 _public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) {
129 _cleanup_free_ char *t = NULL, *s = NULL, *p = NULL;
132 const char *variable;
137 variable = require_active ? "ACTIVE_UID" : "UIDS";
139 p = strappend("/run/systemd/seats/", seat);
143 r = parse_env_file(p, NEWLINE, variable, &s, NULL);
151 if (asprintf(&t, "%lu", (unsigned long) uid) < 0)
154 FOREACH_WORD(w, l, s, state) {
162 static int uid_get_array(uid_t uid, const char *variable, char ***array) {
163 _cleanup_free_ char *p = NULL, *s = NULL;
167 if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
170 r = parse_env_file(p, NEWLINE,
189 a = strv_split(s, " ");
205 _public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) {
206 return uid_get_array(
208 require_active == 0 ? "ONLINE_SESSIONS" :
209 require_active > 0 ? "ACTIVE_SESSIONS" :
214 _public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) {
215 return uid_get_array(
217 require_active == 0 ? "ONLINE_SEATS" :
218 require_active > 0 ? "ACTIVE_SEATS" :
223 static int file_of_session(const char *session, char **_p) {
230 p = strappend("/run/systemd/sessions/", session);
234 r = sd_pid_get_session(0, &buf);
238 p = strappend("/run/systemd/sessions/", buf);
249 _public_ int sd_session_is_active(const char *session) {
251 _cleanup_free_ char *p = NULL, *s = NULL;
253 r = file_of_session(session, &p);
257 r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL);
265 r = parse_boolean(s);
270 _public_ int sd_session_get_state(const char *session, char **state) {
271 _cleanup_free_ char *p = NULL, *s = NULL;
277 r = file_of_session(session, &p);
281 r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
294 _public_ int sd_session_get_uid(const char *session, uid_t *uid) {
296 _cleanup_free_ char *p = NULL, *s = NULL;
301 r = file_of_session(session, &p);
305 r = parse_env_file(p, NEWLINE, "UID", &s, NULL);
313 r = parse_uid(s, uid);
318 static int session_get_string(const char *session, const char *field, char **value) {
319 _cleanup_free_ char *p = NULL, *s = NULL;
325 r = file_of_session(session, &p);
329 r = parse_env_file(p, NEWLINE, field, &s, NULL);
342 _public_ int sd_session_get_seat(const char *session, char **seat) {
343 return session_get_string(session, "SEAT", seat);
346 _public_ int sd_session_get_tty(const char *session, char **tty) {
347 return session_get_string(session, "TTY", tty);
350 _public_ int sd_session_get_service(const char *session, char **service) {
351 return session_get_string(session, "SERVICE", service);
354 _public_ int sd_session_get_type(const char *session, char **type) {
355 return session_get_string(session, "TYPE", type);
358 _public_ int sd_session_get_class(const char *session, char **class) {
359 return session_get_string(session, "CLASS", class);
362 _public_ int sd_session_get_display(const char *session, char **display) {
363 return session_get_string(session, "DISPLAY", display);
366 static int file_of_seat(const char *seat, char **_p) {
373 p = strappend("/run/systemd/seats/", seat);
375 _cleanup_free_ char *buf = NULL;
377 r = sd_session_get_seat(NULL, &buf);
381 p = strappend("/run/systemd/seats/", buf);
392 _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
393 _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL;
396 if (!session && !uid)
399 r = file_of_seat(seat, &p);
403 r = parse_env_file(p, NEWLINE,
417 r = parse_uid(t, uid);
430 _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) {
431 _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL;
432 _cleanup_strv_free_ char **a = NULL;
433 _cleanup_free_ uid_t *b = NULL;
437 r = file_of_seat(seat, &p);
441 r = parse_env_file(p, NEWLINE,
443 "ACTIVE_SESSIONS", &t,
450 a = strv_split(s, " ");
459 FOREACH_WORD(w, l, t, state)
469 FOREACH_WORD(w, l, t, state) {
470 _cleanup_free_ char *k = NULL;
476 r = parse_uid(k, b + i);
504 static int seat_get_can(const char *seat, const char *variable) {
505 _cleanup_free_ char *p = NULL, *s = NULL;
508 r = file_of_seat(seat, &p);
512 r = parse_env_file(p, NEWLINE,
519 r = parse_boolean(s);
526 _public_ int sd_seat_can_multi_session(const char *seat) {
527 return seat_get_can(seat, "CAN_MULTI_SESSION");
530 _public_ int sd_seat_can_tty(const char *seat) {
531 return seat_get_can(seat, "CAN_TTY");
534 _public_ int sd_seat_can_graphical(const char *seat) {
535 return seat_get_can(seat, "CAN_GRAPHICAL");
538 _public_ int sd_get_seats(char ***seats) {
539 return get_files_in_directory("/run/systemd/seats/", seats);
542 _public_ int sd_get_sessions(char ***sessions) {
543 return get_files_in_directory("/run/systemd/sessions/", sessions);
546 _public_ int sd_get_uids(uid_t **users) {
547 _cleanup_closedir_ DIR *d;
550 _cleanup_free_ uid_t *l = NULL;
552 d = opendir("/run/systemd/users/");
558 union dirent_storage buf;
562 k = readdir_r(d, &buf.de, &de);
569 dirent_ensure_type(d, de);
571 if (!dirent_is_file(de))
574 k = parse_uid(de->d_name, &uid);
579 if ((unsigned) r >= n) {
583 t = realloc(l, sizeof(uid_t) * n);
590 assert((unsigned) r < n);
604 _public_ int sd_get_machine_names(char ***machines) {
605 return get_files_in_directory("/run/systemd/machines/", machines);
608 static inline int MONITOR_TO_FD(sd_login_monitor *m) {
609 return (int) (unsigned long) m - 1;
612 static inline sd_login_monitor* FD_TO_MONITOR(int fd) {
613 return (sd_login_monitor*) (unsigned long) (fd + 1);
616 _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) {
623 fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
627 if (!category || streq(category, "seat")) {
628 k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE);
630 close_nointr_nofail(fd);
637 if (!category || streq(category, "session")) {
638 k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE);
640 close_nointr_nofail(fd);
647 if (!category || streq(category, "uid")) {
648 k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE);
650 close_nointr_nofail(fd);
657 if (!category || streq(category, "machine")) {
658 k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE);
660 close_nointr_nofail(fd);
672 *m = FD_TO_MONITOR(fd);
676 _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) {
682 fd = MONITOR_TO_FD(m);
688 _public_ int sd_login_monitor_flush(sd_login_monitor *m) {
693 return flush_fd(MONITOR_TO_FD(m));
696 _public_ int sd_login_monitor_get_fd(sd_login_monitor *m) {
701 return MONITOR_TO_FD(m);
704 _public_ int sd_login_monitor_get_events(sd_login_monitor *m) {
709 /* For now we will only return POLLIN here, since we don't
710 * need anything else ever for inotify. However, let's have
711 * this API to keep our options open should we later on need
716 _public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) {
723 /* For now we will only return (uint64_t) -1, since we don't
724 * need any timeout. However, let's have this API to keep our
725 * options open should we later on need it. */
726 *timeout_usec = (uint64_t) -1;