Operation *operation_free(Operation *o) {
if (!o)
return NULL;
sd_event_source_unref(o->event_source);
safe_close(o->errno_fd);
safe_close(o->extra_fd);
if (o->pid > 1)
(void) sigkill_wait(o->pid);
sd_bus_message_unref(o->message);
if (o->manager) {
LIST_REMOVE(operations, o->manager->operations, o);
o->manager->n_operations--;
}
if (o->machine)
LIST_REMOVE(operations_by_machine, o->machine->operations, o);
free(o);
return NULL;
}
int bus_image_method_remove(
sd_bus_message *message,
void *userdata,
sd_bus_error *error) {
_cleanup_close_pair_ int errno_pipe_fd[2] = { -1, -1 };
Image *image = userdata;
Manager *m = image->userdata;
pid_t child;
int r;
assert(message);
assert(image);
if (m->n_operations >= OPERATIONS_MAX)
return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Too many ongoing operations.");
r = bus_verify_polkit_async(
message,
CAP_SYS_ADMIN,
"org.freedesktop.machine1.manage-images",
NULL,
false,
UID_INVALID,
&m->polkit_registry,
error);
if (r < 0)
return r;
if (r == 0)
return 1; /* Will call us back */
if (pipe2(errno_pipe_fd, O_CLOEXEC|O_NONBLOCK) < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to create pipe: %m");
child = fork();
if (child < 0)
return sd_bus_error_set_errnof(error, errno, "Failed to fork(): %m");
if (child == 0) {
errno_pipe_fd[0] = safe_close(errno_pipe_fd[0]);
r = image_remove(image);
if (r < 0) {
(void) write(errno_pipe_fd[1], &r, sizeof(r));
_exit(EXIT_FAILURE);
}
_exit(EXIT_SUCCESS);
}
errno_pipe_fd[1] = safe_close(errno_pipe_fd[1]);
r = operation_new(m, NULL, child, message, errno_pipe_fd[0]);
if (r < 0) {
(void) sigkill_wait(child);
return r;
}
errno_pipe_fd[0] = -1;
return 1;
}