CAMLprim value stub_launch_activate_socket(value name) {
CAMLparam1(name);
CAMLlocal1(result);
const char *c_name = caml_strdup(String_val(name));
int *listening_fds = NULL;
size_t n_listening_fds = 0;
int err;
caml_release_runtime_system();
err = launch_activate_socket(c_name, &listening_fds, &n_listening_fds);
caml_acquire_runtime_system();
caml_stat_free((void*)c_name);
switch (err) {
case 0:
result = caml_alloc_tuple(n_listening_fds);
for (int i = 0; i < n_listening_fds; i++) {
Store_field(result, i, Val_int(*(listening_fds + i)));
}
break;
default:
unix_error(err, "launch_activate_socket", name);
break;
}
CAMLreturn(result);
}
static void
service_checkin(void)
{
# ifdef HAVE_LAUNCHD
int error; /* Check-in error, if any */
size_t i, /* Looping var */
count; /* Number of listeners */
int *ld_sockets; /* Listener sockets */
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
/*
* Check-in with launchd...
*/
if ((error = launch_activate_socket("Listeners", &ld_sockets, &count)) != 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(error));
exit(EXIT_FAILURE);
return; /* anti-compiler-warning */
}
/*
* Try to match the launchd sockets to the cupsd listeners...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", (int)count);
for (i = 0; i < count; i ++)
service_add_listener(ld_sockets[i], (int)i);
free(ld_sockets);
# elif defined(HAVE_SYSTEMD)
int i, /* Looping var */
count; /* Number of listeners */
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: pid=%d", (int)getpid());
/*
* Check-in with systemd...
*/
if ((count = sd_listen_fds(0)) < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets: %s", strerror(-count));
exit(EXIT_FAILURE);
return; /* anti-compiler-warning */
}
/*
* Try to match the systemd sockets to the cupsd listeners...
*/
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: %d listeners.", count);
for (i = 0; i < count; i ++)
service_add_listener(SD_LISTEN_FDS_START + i, i);
# elif defined(HAVE_UPSTART)
const char *e; /* Environment var */
int fd; /* File descriptor */
if (!(e = getenv("UPSTART_EVENTS")))
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: We did not get started via Upstart.");
exit(EXIT_FAILURE);
return;
}
if (strcasecmp(e, "socket"))
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: We did not get triggered via an Upstart socket event.");
exit(EXIT_FAILURE);
return;
}
if ((e = getenv("UPSTART_FDS")) == NULL)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Unable to get listener sockets from UPSTART_FDS.");
exit(EXIT_FAILURE);
return;
}
cupsdLogMessage(CUPSD_LOG_DEBUG, "service_checkin: UPSTART_FDS=%s", e);
fd = (int)strtol(e, NULL, 10);
if (fd < 0)
{
cupsdLogMessage(CUPSD_LOG_ERROR, "service_checkin: Could not parse UPSTART_FDS: %s", strerror(errno));
exit(EXIT_FAILURE);
return;
}
/*
* Upstart only supportst a single on-demand socket file descriptor...
*/
service_add_listener(fd, 0);
# else
# error "Error: defined HAVE_ONDEMAND but no launchd/systemd/upstart selection"
# endif /* HAVE_LAUNCH_ACTIVATE_SOCKET */
}
