--- /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 General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "util.h"
+#include "cgroup-util.h"
+#include "macro.h"
+#include "sd-login.h"
+
+_public_ int sd_pid_get_session(pid_t pid, char **session) {
+ int r;
+ char *cg_process, *cg_init, *p;
+
+ if (pid == 0)
+ pid = getpid();
+
+ if (pid <= 0)
+ return -EINVAL;
+
+ if (!session)
+ return -EINVAL;
+
+ r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &cg_process);
+ if (r < 0)
+ return r;
+
+ r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &cg_init);
+ if (r < 0) {
+ free(cg_process);
+ return r;
+ }
+
+ if (endswith(cg_init, "/system"))
+ cg_init[strlen(cg_init)-7] = 0;
+ else if (streq(cg_init, "/"))
+ cg_init[0] = 0;
+
+ if (startswith(cg_process, cg_init))
+ p = cg_process + strlen(cg_init);
+ else
+ p = cg_process;
+
+ free(cg_init);
+
+ if (!startswith(p, "/user/")) {
+ free(cg_process);
+ return -ENOENT;
+ }
+
+ p += 6;
+ if (startswith(p, "shared/") || streq(p, "shared")) {
+ free(cg_process);
+ return -ENOENT;
+ }
+
+ p = strchr(p, '/');
+ if (!p) {
+ free(cg_process);
+ return -ENOENT;
+ }
+
+ p++;
+ p = strndup(p, strcspn(p, "/"));
+ free(cg_process);
+
+ if (!p)
+ return -ENOMEM;
+
+ *session = p;
+ return 0;
+}
+
+_public_ int sd_uid_get_state(uid_t uid, char**state) {
+ char *p, *s = NULL;
+ int r;
+
+ if (!state)
+ return -EINVAL;
+
+ if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
+ free(p);
+
+ if (r == -ENOENT) {
+ free(s);
+ s = strdup("offline");
+ if (!s)
+ return -ENOMEM;
+
+ *state = s;
+ return 0;
+ } else if (r < 0) {
+ free(s);
+ return r;
+ } else if (!s)
+ return -EIO;
+
+ *state = s;
+ return 0;
+}
+
+static int uid_is_on_seat_internal(uid_t uid, const char *seat, const char *variable) {
+ char *p, *w, *t, *state, *s = NULL;
+ size_t l;
+ int r;
+
+ if (!seat)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/seats/", seat);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "UIDS", &s, NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ return r;
+ }
+
+ if (!s)
+ return -EIO;
+
+ if (asprintf(&t, "%lu", (unsigned long) uid) < 0) {
+ free(s);
+ return -ENOMEM;
+ }
+
+ FOREACH_WORD(w, l, s, state) {
+ if (strncmp(t, w, l) == 0) {
+ free(s);
+ free(t);
+
+ return 1;
+ }
+ }
+
+ free(s);
+ free(t);
+
+ return 0;
+}
+
+_public_ int sd_uid_is_on_seat(uid_t uid, const char *seat) {
+ return uid_is_on_seat_internal(uid, seat, "UIDS");
+}
+
+_public_ int sd_uid_is_active_on_seat(uid_t uid, const char *seat) {
+ return uid_is_on_seat_internal(uid, seat, "ACTIVE_UID");
+}
+
+_public_ int sd_session_is_active(const char *session) {
+ int r;
+ char *p, *s = NULL;
+
+ if (!session)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/sessions/", session);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ return r;
+ }
+
+ if (!s)
+ return -EIO;
+
+ r = parse_boolean(s);
+ free(s);
+
+ return r;
+}
+
+_public_ int sd_session_get_uid(const char *session, uid_t *uid) {
+ int r;
+ char *p, *s = NULL;
+ unsigned long ul;
+
+ if (!session)
+ return -EINVAL;
+ if (!uid)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/sessions/", session);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "UID", &s, NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ return r;
+ }
+
+ if (!s)
+ return -EIO;
+
+ r = safe_atolu(s, &ul);
+ free(s);
+
+ if (r < 0)
+ return r;
+
+ *uid = (uid_t) ul;
+ return 0;
+}
+
+_public_ int sd_session_get_seat(const char *session, char **seat) {
+ char *p, *s = NULL;
+ int r;
+
+ if (!session)
+ return -EINVAL;
+ if (!seat)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/sessions/", session);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "SEAT", &s, NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ return r;
+ }
+
+ if (isempty(s))
+ return -ENOENT;
+
+ *seat = s;
+ return 0;
+}
+
+_public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
+ char *p, *s = NULL, *t = NULL;
+ int r;
+
+ if (!seat)
+ return -EINVAL;
+ if (!session && !uid)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/seats/", seat);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE,
+ "ACTIVE", &s,
+ "ACTIVE_UID", &t,
+ NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ free(t);
+ return r;
+ }
+
+ if (session && !s) {
+ free(t);
+ return -EIO;
+ }
+
+ if (uid && !t) {
+ free(s);
+ return -EIO;
+ }
+
+ if (uid && t) {
+ unsigned long ul;
+
+ r = safe_atolu(t, &ul);
+ if (r < 0) {
+ free(t);
+ free(s);
+ return r;
+ }
+
+ *uid = (uid_t) ul;
+ }
+
+ free(t);
+
+ if (session && s)
+ *session = s;
+ else
+ free(s);
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff