+int bus_machine_method_get_os_release(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_close_ int mntns_fd = -1, root_fd = -1;
+ _cleanup_close_pair_ int pair[2] = { -1, -1 };
+ _cleanup_strv_free_ char **l = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ Machine *m = userdata;
+ char **k, **v;
+ siginfo_t si;
+ pid_t child;
+ int r;
+
+ assert(bus);
+ assert(message);
+ assert(m);
+
+ r = namespace_open(m->leader, NULL, &mntns_fd, NULL, &root_fd);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, pair) < 0)
+ return sd_bus_error_set_errno(error, -errno);
+
+ child = fork();
+ if (child < 0)
+ return sd_bus_error_set_errno(error, -errno);
+
+ if (child == 0) {
+ _cleanup_close_ int fd = -1;
+
+ pair[0] = safe_close(pair[0]);
+
+ r = namespace_enter(-1, mntns_fd, -1, root_fd);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ fd = open("/etc/os-release", O_RDONLY|O_CLOEXEC);
+ if (fd < 0) {
+ fd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ _exit(EXIT_FAILURE);
+ }
+
+ r = copy_bytes(fd, pair[1], (off_t) -1);
+ if (r < 0)
+ _exit(EXIT_FAILURE);
+
+ _exit(EXIT_SUCCESS);
+ }
+
+ pair[1] = safe_close(pair[1]);
+
+ f = fdopen(pair[0], "re");
+ if (!f)
+ return sd_bus_error_set_errno(error, -errno);
+
+ pair[0] = -1;
+
+ r = load_env_file_pairs(f, "/etc/os-release", NULL, &l);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = wait_for_terminate(child, &si);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+ if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
+ return sd_bus_error_set_errno(error, EIO);
+
+ r = sd_bus_message_new_method_return(message, &reply);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ r = sd_bus_message_open_container(reply, 'a', "{ss}");
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ STRV_FOREACH_PAIR(k, v, l) {
+ r = sd_bus_message_append(reply, "{ss}", *k, *v);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+ }
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ return sd_bus_send(bus, reply, NULL);
+}
+