_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_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_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);
}
int main(int argc, char *argv[]) {
const char *path, *type, *units;
int r, q;
if (argc > 1 && argc != 4) {
log_error("This program takes three or no arguments.");
return EXIT_FAILURE;
}
if (argc > 1) {
arg_dest = argv[1];
arg_dest_late = argv[3];
}
log_set_target(LOG_TARGET_SAFE);
log_parse_environment();
log_open();
umask(0022);
if (access("/dev/kdbus/control", F_OK) < 0)
return 0;
r = cg_pid_get_owner_uid(0, NULL);
if (r >= 0) {
path = "/usr/share/dbus-1/services";
type = "session";
units = USER_DATA_UNIT_PATH;
} else if (r == -ENOENT) {
path = "/usr/share/dbus-1/system-services";
type = "system";
units = SYSTEM_DATA_UNIT_PATH;
} else {
log_error("Failed to determine whether we are running as user or system instance: %s", strerror(-r));
return r;
}
r = parse_dbus_fragments(path, type);
/* FIXME: One day this should just be pulled in statically from basic.target */
q = link_busnames_target(units);
if (q < 0)
r = q;
q = link_compatibility(units);
if (q < 0)
r = q;
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
static void test_proc(void) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
int r;
d = opendir("/proc");
assert_se(d);
FOREACH_DIRENT(de, d, break) {
_cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
pid_t pid;
uid_t uid = UID_INVALID;
if (de->d_type != DT_DIR &&
de->d_type != DT_UNKNOWN)
continue;
r = parse_pid(de->d_name, &pid);
if (r < 0)
continue;
if (is_kernel_thread(pid))
continue;
cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
cg_pid_get_path_shifted(pid, NULL, &path_shifted);
cg_pid_get_owner_uid(pid, &uid);
cg_pid_get_session(pid, &session);
cg_pid_get_unit(pid, &unit);
cg_pid_get_user_unit(pid, &user_unit);
cg_pid_get_machine_name(pid, &machine);
cg_pid_get_slice(pid, &slice);
printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
pid,
path,
path_shifted,
uid,
session,
unit,
user_unit,
machine,
slice);
}
}