+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2011 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/inotify.h>
-#include <sys/poll.h>
-
-#include "util.h"
-#include "cgroup-util.h"
-#include "macro.h"
-#include "strv.h"
-#include "fileio.h"
-#include "login-shared.h"
-#include "sd-login.h"
-
-_public_ int sd_pid_get_session(pid_t pid, char **session) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(session, -EINVAL);
-
- return cg_pid_get_session(pid, session);
-}
-
-_public_ int sd_pid_get_unit(pid_t pid, char **unit) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(unit, -EINVAL);
-
- return cg_pid_get_unit(pid, unit);
-}
-
-_public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(unit, -EINVAL);
-
- return cg_pid_get_user_unit(pid, unit);
-}
-
-_public_ int sd_pid_get_machine_name(pid_t pid, char **name) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(name, -EINVAL);
-
- return cg_pid_get_machine_name(pid, name);
-}
-
-_public_ int sd_pid_get_slice(pid_t pid, char **slice) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(slice, -EINVAL);
-
- return cg_pid_get_slice(pid, slice);
-}
-
-_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
-
- assert_return(pid >= 0, -EINVAL);
- assert_return(uid, -EINVAL);
-
- return cg_pid_get_owner_uid(pid, uid);
-}
-
-_public_ int sd_peer_get_session(int fd, char **session) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(session, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_session(ucred.pid, session);
-}
-
-_public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(uid, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_owner_uid(ucred.pid, uid);
-}
-
-_public_ int sd_peer_get_unit(int fd, char **unit) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(unit, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_unit(ucred.pid, unit);
-}
-
-_public_ int sd_peer_get_user_unit(int fd, char **unit) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(unit, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_user_unit(ucred.pid, unit);
-}
-
-_public_ int sd_peer_get_machine_name(int fd, char **machine) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(machine, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_machine_name(ucred.pid, machine);
-}
-
-_public_ int sd_peer_get_slice(int fd, char **slice) {
- struct ucred ucred;
- int r;
-
- assert_return(fd >= 0, -EINVAL);
- assert_return(slice, -EINVAL);
-
- r = getpeercred(fd, &ucred);
- if (r < 0)
- return r;
-
- return cg_pid_get_slice(ucred.pid, slice);
-}
-
-_public_ int sd_uid_get_state(uid_t uid, char**state) {
- _cleanup_free_ char *p = NULL;
- char *s = NULL;
- int r;
-
- assert_return(state, -EINVAL);
-
- if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
- return -ENOMEM;
-
- r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
- if (r == -ENOENT) {
- free(s);
- s = strdup("offline");
- if (!s)
- return -ENOMEM;
-
- } else if (r < 0) {
- free(s);
- return r;
- } else if (!s)
- return -EIO;
-
- *state = s;
- return 0;
-}
-
-_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) {
- char *w, *state;
- _cleanup_free_ char *t = NULL, *s = NULL, *p = NULL;
- size_t l;
- int r;
- const char *variable;
-
- assert_return(seat, -EINVAL);
-
- variable = require_active ? "ACTIVE_UID" : "UIDS";
-
- p = strappend("/run/systemd/seats/", seat);
- if (!p)
- return -ENOMEM;
-
- r = parse_env_file(p, NEWLINE, variable, &s, NULL);
-
- if (r < 0)
- return r;
-
- if (!s)
- return -EIO;
-
- if (asprintf(&t, "%lu", (unsigned long) uid) < 0)
- return -ENOMEM;
-
- FOREACH_WORD(w, l, s, state) {
- if (strneq(t, w, l))
- return 1;
- }
-
- return 0;
-}
-
-static int uid_get_array(uid_t uid, const char *variable, char ***array) {
- _cleanup_free_ char *p = NULL, *s = NULL;
- char **a;
- int r;
-
- if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
- return -ENOMEM;
-
- r = parse_env_file(p, NEWLINE,
- variable, &s,
- NULL);
- if (r < 0) {
- if (r == -ENOENT) {
- if (array)
- *array = NULL;
- return 0;
- }
-
- return r;
- }
-
- if (!s) {
- if (array)
- *array = NULL;
- return 0;
- }
-
- a = strv_split(s, " ");
-
- if (!a)
- return -ENOMEM;
-
- strv_uniq(a);
- r = strv_length(a);
-
- if (array)
- *array = a;
- else
- strv_free(a);
-
- return r;
-}
-
-_public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) {
- return uid_get_array(
- uid,
- require_active == 0 ? "ONLINE_SESSIONS" :
- require_active > 0 ? "ACTIVE_SESSIONS" :
- "SESSIONS",
- sessions);
-}
-
-_public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) {
- return uid_get_array(
- uid,
- require_active == 0 ? "ONLINE_SEATS" :
- require_active > 0 ? "ACTIVE_SEATS" :
- "SEATS",
- seats);
-}
-
-static int file_of_session(const char *session, char **_p) {
- char *p;
- int r;
-
- assert(_p);
-
- if (session) {
- if (!session_id_valid(session))
- return -EINVAL;
-
- p = strappend("/run/systemd/sessions/", session);
- } else {
- _cleanup_free_ char *buf = NULL;
-
- r = sd_pid_get_session(0, &buf);
- if (r < 0)
- return r;
-
- p = strappend("/run/systemd/sessions/", buf);
- }
-
- if (!p)
- return -ENOMEM;
-
- *_p = p;
- return 0;
-}
-
-_public_ int sd_session_is_active(const char *session) {
- int r;
- _cleanup_free_ char *p = NULL, *s = NULL;
-
- r = file_of_session(session, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL);
- if (r < 0)
- return r;
-
- if (!s)
- return -EIO;
-
- return parse_boolean(s);
-}
-
-_public_ int sd_session_is_remote(const char *session) {
- int r;
- _cleanup_free_ char *p = NULL, *s = NULL;
-
- r = file_of_session(session, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE, "REMOTE", &s, NULL);
- if (r < 0)
- return r;
-
- if (!s)
- return -EIO;
-
- return parse_boolean(s);
-}
-
-_public_ int sd_session_get_state(const char *session, char **state) {
- _cleanup_free_ char *p = NULL, *s = NULL;
- int r;
-
- assert_return(state, -EINVAL);
-
- r = file_of_session(session, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
-
- if (r < 0)
- return r;
- else if (!s)
- return -EIO;
-
- *state = s;
- s = NULL;
-
- return 0;
-}
-
-_public_ int sd_session_get_uid(const char *session, uid_t *uid) {
- int r;
- _cleanup_free_ char *p = NULL, *s = NULL;
-
- assert_return(uid, -EINVAL);
-
- r = file_of_session(session, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE, "UID", &s, NULL);
- if (r < 0)
- return r;
-
- if (!s)
- return -EIO;
-
- return parse_uid(s, uid);
-}
-
-static int session_get_string(const char *session, const char *field, char **value) {
- _cleanup_free_ char *p = NULL, *s = NULL;
- int r;
-
- assert_return(value, -EINVAL);
-
- r = file_of_session(session, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE, field, &s, NULL);
-
- if (r < 0)
- return r;
-
- if (isempty(s))
- return -ENOENT;
-
- *value = s;
- s = NULL;
- return 0;
-}
-
-_public_ int sd_session_get_seat(const char *session, char **seat) {
- return session_get_string(session, "SEAT", seat);
-}
-
-_public_ int sd_session_get_tty(const char *session, char **tty) {
- return session_get_string(session, "TTY", tty);
-}
-
-_public_ int sd_session_get_vt(const char *session, unsigned *vtnr) {
- _cleanup_free_ char *vtnr_string = NULL;
- unsigned u;
- int r;
-
- r = session_get_string(session, "VTNR", &vtnr_string);
- if (r < 0)
- return r;
-
- r = safe_atou(vtnr_string, &u);
- if (r < 0)
- return r;
-
- *vtnr = u;
- return 0;
-}
-
-_public_ int sd_session_get_service(const char *session, char **service) {
- return session_get_string(session, "SERVICE", service);
-}
-
-_public_ int sd_session_get_type(const char *session, char **type) {
- return session_get_string(session, "TYPE", type);
-}
-
-_public_ int sd_session_get_class(const char *session, char **class) {
- return session_get_string(session, "CLASS", class);
-}
-
-_public_ int sd_session_get_display(const char *session, char **display) {
- return session_get_string(session, "DISPLAY", display);
-}
-
-_public_ int sd_session_get_remote_user(const char *session, char **remote_user) {
- return session_get_string(session, "REMOTE_USER", remote_user);
-}
-
-_public_ int sd_session_get_remote_host(const char *session, char **remote_host) {
- return session_get_string(session, "REMOTE_HOST", remote_host);
-}
-
-static int file_of_seat(const char *seat, char **_p) {
- char *p;
- int r;
-
- assert(_p);
-
- if (seat)
- p = strappend("/run/systemd/seats/", seat);
- else {
- _cleanup_free_ char *buf = NULL;
-
- r = sd_session_get_seat(NULL, &buf);
- if (r < 0)
- return r;
-
- p = strappend("/run/systemd/seats/", buf);
- }
-
- if (!p)
- return -ENOMEM;
-
- *_p = p;
- p = NULL;
- return 0;
-}
-
-_public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
- _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL;
- int r;
-
- assert_return(session || uid, -EINVAL);
-
- r = file_of_seat(seat, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE,
- "ACTIVE", &s,
- "ACTIVE_UID", &t,
- NULL);
- if (r < 0)
- return r;
-
- if (session && !s)
- return -ENOENT;
-
- if (uid && !t)
- return -ENOENT;
-
- if (uid && t) {
- r = parse_uid(t, uid);
- if (r < 0)
- return r;
- }
-
- if (session && s) {
- *session = s;
- s = NULL;
- }
-
- return 0;
-}
-
-_public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) {
- _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL;
- _cleanup_strv_free_ char **a = NULL;
- _cleanup_free_ uid_t *b = NULL;
- unsigned n = 0;
- int r;
-
- r = file_of_seat(seat, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE,
- "SESSIONS", &s,
- "ACTIVE_SESSIONS", &t,
- NULL);
-
- if (r < 0)
- return r;
-
- if (s) {
- a = strv_split(s, " ");
- if (!a)
- return -ENOMEM;
- }
-
- if (uids && t) {
- char *w, *state;
- size_t l;
-
- FOREACH_WORD(w, l, t, state)
- n++;
-
- if (n > 0) {
- unsigned i = 0;
-
- b = new(uid_t, n);
- if (!b)
- return -ENOMEM;
-
- FOREACH_WORD(w, l, t, state) {
- _cleanup_free_ char *k = NULL;
-
- k = strndup(w, l);
- if (!k)
- return -ENOMEM;
-
- r = parse_uid(k, b + i);
-
- if (r < 0)
- continue;
-
- i++;
- }
- }
- }
-
- r = strv_length(a);
-
- if (sessions) {
- *sessions = a;
- a = NULL;
- }
-
- if (uids) {
- *uids = b;
- b = NULL;
- }
-
- if (n_uids)
- *n_uids = n;
-
- return r;
-}
-
-static int seat_get_can(const char *seat, const char *variable) {
- _cleanup_free_ char *p = NULL, *s = NULL;
- int r;
-
- assert_return(variable, -EINVAL);
-
- r = file_of_seat(seat, &p);
- if (r < 0)
- return r;
-
- r = parse_env_file(p, NEWLINE,
- variable, &s,
- NULL);
- if (r < 0)
- return r;
- if (!s)
- return 0;
-
- return parse_boolean(s);
-}
-
-_public_ int sd_seat_can_multi_session(const char *seat) {
- return seat_get_can(seat, "CAN_MULTI_SESSION");
-}
-
-_public_ int sd_seat_can_tty(const char *seat) {
- return seat_get_can(seat, "CAN_TTY");
-}
-
-_public_ int sd_seat_can_graphical(const char *seat) {
- return seat_get_can(seat, "CAN_GRAPHICAL");
-}
-
-_public_ int sd_get_seats(char ***seats) {
- return get_files_in_directory("/run/systemd/seats/", seats);
-}
-
-_public_ int sd_get_sessions(char ***sessions) {
- return get_files_in_directory("/run/systemd/sessions/", sessions);
-}
-
-_public_ int sd_get_uids(uid_t **users) {
- _cleanup_closedir_ DIR *d;
- int r = 0;
- unsigned n = 0;
- _cleanup_free_ uid_t *l = NULL;
-
- d = opendir("/run/systemd/users/");
- if (!d)
- return -errno;
-
- for (;;) {
- struct dirent *de;
- int k;
- uid_t uid;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno != 0)
- return -errno;
-
- 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 (users) {
- if ((unsigned) r >= n) {
- uid_t *t;
-
- n = MAX(16, 2*r);
- t = realloc(l, sizeof(uid_t) * n);
- if (!t)
- return -ENOMEM;
-
- l = t;
- }
-
- assert((unsigned) r < n);
- l[r++] = uid;
- } else
- r++;
- }
-
- if (users) {
- *users = l;
- l = NULL;
- }
-
- return r;
-}
-
-_public_ int sd_get_machine_names(char ***machines) {
- char **l = NULL, **a, **b;
- int r;
-
- assert_return(machines, -EINVAL);
-
- r = get_files_in_directory("/run/systemd/machines/", &l);
- if (r < 0)
- return r;
-
- if (l) {
- r = 0;
-
- /* Filter out the unit: symlinks */
- for (a = l, b = l; *a; a++) {
- if (startswith(*a, "unit:"))
- free(*a);
- else {
- *b = *a;
- b++;
- r++;
- }
- }
-
- *b = NULL;
- }
-
- *machines = l;
- return r;
-}
-
-_public_ int sd_machine_get_class(const char *machine, char **class) {
- _cleanup_free_ char *c = NULL;
- const char *p;
- int r;
-
- assert_return(filename_is_safe(machine), -EINVAL);
- assert_return(class, -EINVAL);
-
- p = strappenda("/run/systemd/machines/", machine);
- r = parse_env_file(p, NEWLINE, "CLASS", &c, NULL);
- if (r < 0)
- return r;
- if (!c)
- return -EIO;
-
- *class = c;
- c = NULL;
-
- return 0;
-}
-
-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) {
- int fd, k;
- bool good = false;
-
- assert_return(m, -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 (!category || streq(category, "machine")) {
- k = inotify_add_watch(fd, "/run/systemd/machines/", 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;
-
- assert_return(m, NULL);
-
- fd = MONITOR_TO_FD(m);
- close_nointr(fd);
-
- return NULL;
-}
-
-_public_ int sd_login_monitor_flush(sd_login_monitor *m) {
-
- assert_return(m, -EINVAL);
-
- return flush_fd(MONITOR_TO_FD(m));
-}
-
-_public_ int sd_login_monitor_get_fd(sd_login_monitor *m) {
-
- assert_return(m, -EINVAL);
-
- return MONITOR_TO_FD(m);
-}
-
-_public_ int sd_login_monitor_get_events(sd_login_monitor *m) {
-
- assert_return(m, -EINVAL);
-
- /* For now we will only return POLLIN here, since we don't
- * need anything else ever for inotify. However, let's have
- * this API to keep our options open should we later on need
- * it. */
- return POLLIN;
-}
-
-_public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) {
-
- assert_return(m, -EINVAL);
- assert_return(timeout_usec, -EINVAL);
-
- /* For now we will only return (uint64_t) -1, since we don't
- * need any timeout. However, let's have this API to keep our
- * options open should we later on need it. */
- *timeout_usec = (uint64_t) -1;
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff