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-rw-r--r--src/libsystemd/sd-login/sd-login.c1051
1 files changed, 1051 insertions, 0 deletions
diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c
new file mode 100644
index 0000000..1fc3795
--- /dev/null
+++ b/src/libsystemd/sd-login/sd-login.c
@@ -0,0 +1,1051 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <poll.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+
+#include "sd-login.h"
+
+#include "alloc-util.h"
+#include "cgroup-util.h"
+#include "dirent-util.h"
+#include "env-file.h"
+#include "escape.h"
+#include "extract-word.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "fs-util.h"
+#include "hostname-util.h"
+#include "io-util.h"
+#include "login-util.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "socket-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+/* Error codes:
+ *
+ * invalid input parameters → -EINVAL
+ * invalid fd → -EBADF
+ * process does not exist → -ESRCH
+ * cgroup does not exist → -ENOENT
+ * machine, session does not exist → -ENXIO
+ * requested metadata on object is missing → -ENODATA
+ */
+
+_public_ int sd_pid_get_session(pid_t pid, char **session) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(session, -EINVAL);
+
+ r = cg_pid_get_session(pid, session);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_unit(pid_t pid, char **unit) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(unit, -EINVAL);
+
+ r = cg_pid_get_unit(pid, unit);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(unit, -EINVAL);
+
+ r = cg_pid_get_user_unit(pid, unit);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_machine_name(pid_t pid, char **name) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(name, -EINVAL);
+
+ r = cg_pid_get_machine_name(pid, name);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_slice(pid_t pid, char **slice) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(slice, -EINVAL);
+
+ r = cg_pid_get_slice(pid, slice);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_user_slice(pid_t pid, char **slice) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(slice, -EINVAL);
+
+ r = cg_pid_get_user_slice(pid, slice);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(uid, -EINVAL);
+
+ r = cg_pid_get_owner_uid(pid, uid);
+ return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
+}
+
+_public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) {
+ char *c;
+ int r;
+
+ assert_return(pid >= 0, -EINVAL);
+ assert_return(cgroup, -EINVAL);
+
+ r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c);
+ if (r < 0)
+ return r;
+
+ /* The internal APIs return the empty string for the root
+ * cgroup, let's return the "/" in the public APIs instead, as
+ * that's easier and less ambiguous for people to grok. */
+ if (isempty(c)) {
+ free(c);
+ c = strdup("/");
+ if (!c)
+ return -ENOMEM;
+
+ }
+
+ *cgroup = c;
+ return 0;
+}
+
+_public_ int sd_peer_get_session(int fd, char **session) {
+ struct ucred ucred = {};
+ int r;
+
+ assert_return(fd >= 0, -EBADF);
+ 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, -EBADF);
+ 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, -EBADF);
+ 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, -EBADF);
+ 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, -EBADF);
+ 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, -EBADF);
+ assert_return(slice, -EINVAL);
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ return cg_pid_get_slice(ucred.pid, slice);
+}
+
+_public_ int sd_peer_get_user_slice(int fd, char **slice) {
+ struct ucred ucred;
+ int r;
+
+ assert_return(fd >= 0, -EBADF);
+ assert_return(slice, -EINVAL);
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ return cg_pid_get_user_slice(ucred.pid, slice);
+}
+
+_public_ int sd_peer_get_cgroup(int fd, char **cgroup) {
+ struct ucred ucred;
+ int r;
+
+ assert_return(fd >= 0, -EBADF);
+ assert_return(cgroup, -EINVAL);
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ return sd_pid_get_cgroup(ucred.pid, cgroup);
+}
+
+static int file_of_uid(uid_t uid, char **p) {
+
+ assert_return(uid_is_valid(uid), -EINVAL);
+ assert(p);
+
+ if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
+_public_ int sd_uid_get_state(uid_t uid, char**state) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(state, -EINVAL);
+
+ r = file_of_uid(uid, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, "STATE", &s);
+ if (r == -ENOENT) {
+ r = free_and_strdup(&s, "offline");
+ if (r < 0)
+ return r;
+ } else if (r < 0)
+ return r;
+ else if (isempty(s))
+ return -EIO;
+
+ *state = TAKE_PTR(s);
+ return 0;
+}
+
+_public_ int sd_uid_get_display(uid_t uid, char **session) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(session, -EINVAL);
+
+ r = file_of_uid(uid, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, "DISPLAY", &s);
+ if (r == -ENOENT)
+ return -ENODATA;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -ENODATA;
+
+ *session = TAKE_PTR(s);
+
+ return 0;
+}
+
+static int file_of_seat(const char *seat, char **_p) {
+ char *p;
+ int r;
+
+ assert(_p);
+
+ if (seat) {
+ if (!filename_is_valid(seat))
+ return -EINVAL;
+
+ p = path_join("/run/systemd/seats", seat);
+ } else {
+ _cleanup_free_ char *buf = NULL;
+
+ r = sd_session_get_seat(NULL, &buf);
+ if (r < 0)
+ return r;
+
+ p = path_join("/run/systemd/seats", buf);
+ }
+ if (!p)
+ return -ENOMEM;
+
+ *_p = TAKE_PTR(p);
+ return 0;
+}
+
+_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) {
+ _cleanup_free_ char *filename = NULL, *content = NULL;
+ int r;
+
+ assert_return(uid_is_valid(uid), -EINVAL);
+
+ r = file_of_seat(seat, &filename);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, filename,
+ require_active ? "ACTIVE_UID" : "UIDS",
+ &content);
+ if (r == -ENOENT)
+ return 0;
+ if (r < 0)
+ return r;
+ if (isempty(content))
+ return 0;
+
+ char t[DECIMAL_STR_MAX(uid_t)];
+ xsprintf(t, UID_FMT, uid);
+
+ return string_contains_word(content, NULL, t);
+}
+
+static int uid_get_array(uid_t uid, const char *variable, char ***array) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ char **a;
+ int r;
+
+ assert(variable);
+
+ r = file_of_uid(uid, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, variable, &s);
+ if (r == -ENOENT || (r >= 0 && isempty(s))) {
+ if (array)
+ *array = NULL;
+ return 0;
+ }
+ if (r < 0)
+ return r;
+
+ a = strv_split(s, NULL);
+ if (!a)
+ return -ENOMEM;
+
+ strv_uniq(a);
+ r = (int) 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 = path_join("/run/systemd/sessions", session);
+ } else {
+ _cleanup_free_ char *buf = NULL;
+
+ r = sd_pid_get_session(0, &buf);
+ if (r < 0)
+ return r;
+
+ p = path_join("/run/systemd/sessions", buf);
+ }
+
+ if (!p)
+ return -ENOMEM;
+
+ *_p = p;
+ return 0;
+}
+
+_public_ int sd_session_is_active(const char *session) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ r = file_of_session(session, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, "ACTIVE", &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -EIO;
+
+ return parse_boolean(s);
+}
+
+_public_ int sd_session_is_remote(const char *session) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ r = file_of_session(session, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, "REMOTE", &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -ENODATA;
+
+ 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(NULL, p, "STATE", &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -EIO;
+
+ *state = TAKE_PTR(s);
+
+ 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(NULL, p, "UID", &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(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);
+ assert(field);
+
+ r = file_of_session(session, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p, field, &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -ENODATA;
+
+ *value = TAKE_PTR(s);
+ 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;
+
+ assert_return(vtnr, -EINVAL);
+
+ 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_desktop(const char *session, char **desktop) {
+ _cleanup_free_ char *escaped = NULL;
+ char *t;
+ int r;
+
+ assert_return(desktop, -EINVAL);
+
+ r = session_get_string(session, "DESKTOP", &escaped);
+ if (r < 0)
+ return r;
+
+ r = cunescape(escaped, 0, &t);
+ if (r < 0)
+ return r;
+
+ *desktop = t;
+ return 0;
+}
+
+_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);
+}
+
+_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(NULL, p,
+ "ACTIVE", &s,
+ "ACTIVE_UID", &t);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+
+ if (session && !s)
+ return -ENODATA;
+
+ if (uid && !t)
+ return -ENODATA;
+
+ if (uid && t) {
+ r = parse_uid(t, uid);
+ if (r < 0)
+ return r;
+ }
+
+ if (session && s)
+ *session = TAKE_PTR(s);
+
+ return 0;
+}
+
+_public_ int sd_seat_get_sessions(
+ const char *seat,
+ char ***ret_sessions,
+ uid_t **ret_uids,
+ unsigned *ret_n_uids) {
+
+ _cleanup_free_ char *fname = NULL, *session_line = NULL, *uid_line = NULL;
+ _cleanup_strv_free_ char **sessions = NULL;
+ _cleanup_free_ uid_t *uids = NULL;
+ unsigned n_sessions = 0;
+ int r;
+
+ r = file_of_seat(seat, &fname);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, fname,
+ "SESSIONS", &session_line,
+ "UIDS", &uid_line);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+
+ if (session_line) {
+ sessions = strv_split(session_line, NULL);
+ if (!sessions)
+ return -ENOMEM;
+
+ n_sessions = strv_length(sessions);
+ };
+
+ if (ret_uids && uid_line) {
+ uids = new(uid_t, n_sessions);
+ if (!uids)
+ return -ENOMEM;
+
+ size_t n = 0;
+ for (const char *p = uid_line;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = parse_uid(word, &uids[n++]);
+ if (r < 0)
+ return r;
+ }
+
+ if (n != n_sessions)
+ return -EUCLEAN;
+ }
+
+ if (ret_sessions)
+ *ret_sessions = TAKE_PTR(sessions);
+ if (ret_uids)
+ *ret_uids = TAKE_PTR(uids);
+ if (ret_n_uids)
+ *ret_n_uids = n_sessions;
+
+ return n_sessions;
+}
+
+static int seat_get_can(const char *seat, const char *variable) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert(variable);
+
+ r = file_of_seat(seat, &p);
+ if (r < 0)
+ return r;
+
+ r = parse_env_file(NULL, p,
+ variable, &s);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (isempty(s))
+ return -ENODATA;
+
+ return parse_boolean(s);
+}
+
+_public_ int sd_seat_can_multi_session(const char *seat) {
+ return true;
+}
+
+_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) {
+ int r;
+
+ r = get_files_in_directory("/run/systemd/seats/", seats);
+ if (r == -ENOENT) {
+ if (seats)
+ *seats = NULL;
+ return 0;
+ }
+ return r;
+}
+
+_public_ int sd_get_sessions(char ***sessions) {
+ int r;
+
+ r = get_files_in_directory("/run/systemd/sessions/", sessions);
+ if (r == -ENOENT) {
+ if (sessions)
+ *sessions = NULL;
+ return 0;
+ }
+ return r;
+}
+
+_public_ int sd_get_uids(uid_t **users) {
+ _cleanup_closedir_ DIR *d;
+ struct dirent *de;
+ int r = 0;
+ unsigned n = 0;
+ _cleanup_free_ uid_t *l = NULL;
+
+ d = opendir("/run/systemd/users/");
+ if (!d) {
+ if (errno == ENOENT) {
+ if (users)
+ *users = NULL;
+ return 0;
+ }
+ return -errno;
+ }
+
+ FOREACH_DIRENT_ALL(de, d, return -errno) {
+ int k;
+ uid_t uid;
+
+ 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 = reallocarray(l, sizeof(uid_t), n);
+ if (!t)
+ return -ENOMEM;
+
+ l = t;
+ }
+
+ assert((unsigned) r < n);
+ l[r++] = uid;
+ } else
+ r++;
+ }
+
+ if (users)
+ *users = TAKE_PTR(l);
+
+ return r;
+}
+
+_public_ int sd_get_machine_names(char ***machines) {
+ _cleanup_strv_free_ char **l = NULL;
+ char **a, **b;
+ int r;
+
+ r = get_files_in_directory("/run/systemd/machines/", &l);
+ if (r == -ENOENT) {
+ if (machines)
+ *machines = NULL;
+ return 0;
+ }
+ if (r < 0)
+ return r;
+
+ if (l) {
+ r = 0;
+
+ /* Filter out the unit: symlinks */
+ for (a = b = l; *a; a++) {
+ if (startswith(*a, "unit:") || !machine_name_is_valid(*a))
+ free(*a);
+ else {
+ *b = *a;
+ b++;
+ r++;
+ }
+ }
+
+ *b = NULL;
+ }
+
+ if (machines)
+ *machines = TAKE_PTR(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(class, -EINVAL);
+
+ if (streq(machine, ".host")) {
+ c = strdup("host");
+ if (!c)
+ return -ENOMEM;
+ } else {
+ if (!machine_name_is_valid(machine))
+ return -EINVAL;
+
+ p = strjoina("/run/systemd/machines/", machine);
+ r = parse_env_file(NULL, p, "CLASS", &c);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (!c)
+ return -EIO;
+ }
+
+ *class = TAKE_PTR(c);
+ return 0;
+}
+
+_public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices) {
+ _cleanup_free_ char *netif_line = NULL;
+ const char *p;
+ int r;
+
+ assert_return(machine_name_is_valid(machine), -EINVAL);
+
+ p = strjoina("/run/systemd/machines/", machine);
+ r = parse_env_file(NULL, p, "NETIF", &netif_line);
+ if (r == -ENOENT)
+ return -ENXIO;
+ if (r < 0)
+ return r;
+ if (!netif_line) {
+ *ret_ifindices = NULL;
+ return 0;
+ }
+
+ _cleanup_strv_free_ char **tt = strv_split(netif_line, NULL);
+ if (!tt)
+ return -ENOMEM;
+
+ _cleanup_free_ int *ifindices = NULL;
+ if (ret_ifindices) {
+ ifindices = new(int, strv_length(tt));
+ if (!ifindices)
+ return -ENOMEM;
+ }
+
+ size_t n = 0;
+ for (size_t i = 0; tt[i]; i++) {
+ int ind;
+
+ ind = parse_ifindex(tt[i]);
+ if (ind < 0)
+ /* Return -EUCLEAN to distinguish from -EINVAL for invalid args */
+ return ind == -EINVAL ? -EUCLEAN : ind;
+
+ if (ret_ifindices)
+ ifindices[n] = ind;
+ n++;
+ }
+
+ if (ret_ifindices)
+ *ret_ifindices = TAKE_PTR(ifindices);
+
+ return n;
+}
+
+static int MONITOR_TO_FD(sd_login_monitor *m) {
+ return (int) (unsigned long) m - 1;
+}
+
+static 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) {
+ _cleanup_close_ int fd = -1;
+ bool good = false;
+ int k;
+
+ 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)
+ 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)
+ 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)
+ 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)
+ return -errno;
+
+ good = true;
+ }
+
+ if (!good)
+ return -EINVAL;
+
+ *m = FD_TO_MONITOR(TAKE_FD(fd));
+ return 0;
+}
+
+_public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) {
+ if (m)
+ close_nointr(MONITOR_TO_FD(m));
+
+ return NULL;
+}
+
+_public_ int sd_login_monitor_flush(sd_login_monitor *m) {
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = flush_fd(MONITOR_TO_FD(m));
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+_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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-10 16:21:52 +0000