struct rspamd_worker *
rspamd_fork_worker (struct rspamd_main *rspamd_main,
struct rspamd_worker_conf *cf,
guint index,
struct event_base *ev_base)
{
struct rspamd_worker *wrk;
gint rc;
struct rlimit rlim;
/* Starting worker process */
wrk = (struct rspamd_worker *) g_malloc0 (sizeof (struct rspamd_worker));
if (!rspamd_socketpair (wrk->control_pipe)) {
msg_err ("socketpair failure: %s", strerror (errno));
exit (-errno);
}
if (!rspamd_socketpair (wrk->srv_pipe)) {
msg_err ("socketpair failure: %s", strerror (errno));
exit (-errno);
}
wrk->srv = rspamd_main;
wrk->type = cf->type;
wrk->cf = cf;
REF_RETAIN (cf);
wrk->index = index;
wrk->ctx = cf->ctx;
wrk->finish_actions = g_ptr_array_new ();
wrk->pid = fork ();
switch (wrk->pid) {
case 0:
/* Update pid for logging */
rspamd_log_update_pid (cf->type, rspamd_main->logger);
/* Init PRNG after fork */
rc = ottery_init (rspamd_main->cfg->libs_ctx->ottery_cfg);
if (rc != OTTERY_ERR_NONE) {
msg_err_main ("cannot initialize PRNG: %d", rc);
abort ();
}
rspamd_random_seed_fast ();
#ifdef HAVE_EVUTIL_RNG_INIT
evutil_secure_rng_init ();
#endif
/* Remove the inherited event base */
event_reinit (rspamd_main->ev_base);
event_base_free (rspamd_main->ev_base);
/* Drop privilleges */
rspamd_worker_drop_priv (rspamd_main);
/* Set limits */
rspamd_worker_set_limits (rspamd_main, cf);
/* Re-set stack limit */
getrlimit (RLIMIT_STACK, &rlim);
rlim.rlim_cur = 100 * 1024 * 1024;
rlim.rlim_max = rlim.rlim_cur;
setrlimit (RLIMIT_STACK, &rlim);
setproctitle ("%s process", cf->worker->name);
rspamd_pidfile_close (rspamd_main->pfh);
/* Do silent log reopen to avoid collisions */
rspamd_log_close (rspamd_main->logger);
rspamd_log_open (rspamd_main->logger);
wrk->start_time = rspamd_get_calendar_ticks ();
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION <= 30))
# if (GLIB_MINOR_VERSION > 20)
/* Ugly hack for old glib */
if (!g_thread_get_initialized ()) {
g_thread_init (NULL);
}
# else
g_thread_init (NULL);
# endif
#endif
msg_info_main ("starting %s process %P (%d)", cf->worker->name,
getpid (), index);
/* Close parent part of socketpair */
close (wrk->control_pipe[0]);
close (wrk->srv_pipe[0]);
rspamd_socket_nonblocking (wrk->control_pipe[1]);
rspamd_socket_nonblocking (wrk->srv_pipe[1]);
/* Execute worker */
cf->worker->worker_start_func (wrk);
exit (EXIT_FAILURE);
break;
case -1:
msg_err_main ("cannot fork main process. %s", strerror (errno));
rspamd_pidfile_remove (rspamd_main->pfh);
exit (-errno);
break;
default:
/* Close worker part of socketpair */
close (wrk->control_pipe[1]);
close (wrk->srv_pipe[1]);
rspamd_socket_nonblocking (wrk->control_pipe[0]);
rspamd_socket_nonblocking (wrk->srv_pipe[0]);
rspamd_srv_start_watching (wrk, ev_base);
/* Insert worker into worker's table, pid is index */
g_hash_table_insert (rspamd_main->workers, GSIZE_TO_POINTER (
wrk->pid), wrk);
break;
}
return wrk;
}
static gint
lua_worker_spawn_process (lua_State *L)
{
struct rspamd_worker *w = lua_check_worker (L, 1);
struct rspamd_lua_process_cbdata *cbdata;
struct rspamd_abstract_worker_ctx *actx;
struct rspamd_srv_command srv_cmd;
const gchar *cmdline = NULL, *input = NULL;
gsize inputlen = 0;
pid_t pid;
GError *err = NULL;
gint func_cbref, cb_cbref;
if (!rspamd_lua_parse_table_arguments (L, 2, &err,
"func=F;exec=S;stdin=V;*on_complete=F", &func_cbref,
&cmdline, &inputlen, &input, &cb_cbref)) {
msg_err ("cannot get parameters list: %e", err);
if (err) {
g_error_free (err);
}
return 0;
}
cbdata = g_malloc0 (sizeof (*cbdata));
cbdata->cb_cbref = cb_cbref;
cbdata->func_cbref = func_cbref;
if (input) {
cbdata->out_buf = g_string_new_len (input, inputlen);
cbdata->out_pos = 0;
}
if (rspamd_socketpair (cbdata->sp, TRUE) == -1) {
msg_err ("cannot spawn socketpair: %s", strerror (errno));
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->func_cbref);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->cb_cbref);
g_free (cbdata);
return 0;
}
actx = w->ctx;
cbdata->wrk = w;
cbdata->L = L;
cbdata->ev_base = actx->ev_base;
cbdata->sz = (guint64)-1;
pid = fork ();
if (pid == -1) {
msg_err ("cannot spawn process: %s", strerror (errno));
close (cbdata->sp[0]);
close (cbdata->sp[1]);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->func_cbref);
luaL_unref (L, LUA_REGISTRYINDEX, cbdata->cb_cbref);
g_free (cbdata);
return 0;
}
else if (pid == 0) {
/* Child */
gint rc;
gchar inbuf[4];
rspamd_log_update_pid (w->cf->type, w->srv->logger);
rc = ottery_init (w->srv->cfg->libs_ctx->ottery_cfg);
if (rc != OTTERY_ERR_NONE) {
msg_err ("cannot initialize PRNG: %d", rc);
abort ();
}
rspamd_random_seed_fast ();
#ifdef HAVE_EVUTIL_RNG_INIT
evutil_secure_rng_init ();
#endif
close (cbdata->sp[0]);
/* Here we assume that we can block on writing results */
rspamd_socket_blocking (cbdata->sp[1]);
event_reinit (cbdata->ev_base);
g_hash_table_remove_all (w->signal_events);
rspamd_worker_unblock_signals ();
rspamd_lua_execute_lua_subprocess (L, cbdata);
/* Wait for parent to reply and exit */
rc = read (cbdata->sp[1], inbuf, sizeof (inbuf));
if (memcmp (inbuf, "\0\0\0\0", 4) == 0) {
exit (EXIT_SUCCESS);
}
else {
msg_err ("got invalid reply from parent");
exit (EXIT_FAILURE);
}
}
cbdata->cpid = pid;
cbdata->io_buf = g_string_sized_new (8);
/* Notify main */
memset (&srv_cmd, 0, sizeof (srv_cmd));
srv_cmd.type = RSPAMD_SRV_ON_FORK;
srv_cmd.cmd.on_fork.state = child_create;
srv_cmd.cmd.on_fork.cpid = pid;
srv_cmd.cmd.on_fork.ppid = getpid ();
rspamd_srv_send_command (w, cbdata->ev_base, &srv_cmd, -1, NULL, NULL);
close (cbdata->sp[1]);
rspamd_socket_nonblocking (cbdata->sp[0]);
/* Parent */
rspamd_worker_set_signal_handler (SIGCHLD, w, cbdata->ev_base,
rspamd_lua_cld_handler,
cbdata);
/* Add result pipe waiting */
event_set (&cbdata->ev, cbdata->sp[0], EV_READ | EV_PERSIST,
rspamd_lua_subprocess_io, cbdata);
event_base_set (cbdata->ev_base, &cbdata->ev);
/* TODO: maybe add timeout? */
event_add (&cbdata->ev, NULL);
return 0;
}
