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/*
* Unix SMB/CIFS implementation.
* Wait for process death
* Copyright (C) Volker Lendecke 2016
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include <tevent.h>
#include <talloc.h>
#include "serverid.h"
#include "server_id_watch.h"
#include "lib/util/tevent_unix.h"
struct server_id_watch_state {
struct tevent_context *ev;
struct server_id pid;
};
static void server_id_watch_waited(struct tevent_req *subreq);
struct tevent_req *server_id_watch_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct server_id pid)
{
struct tevent_req *req, *subreq;
struct server_id_watch_state *state;
req = tevent_req_create(mem_ctx, &state, struct server_id_watch_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->pid = pid;
if (!serverid_exists(&state->pid)) {
tevent_req_done(req);
return tevent_req_post(req, ev);
}
subreq = tevent_wakeup_send(
state, ev, tevent_timeval_current_ofs(0, 500000));
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, server_id_watch_waited, req);
return req;
}
static void server_id_watch_waited(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct server_id_watch_state *state = tevent_req_data(
req, struct server_id_watch_state);
bool ok;
ok = tevent_wakeup_recv(subreq);
TALLOC_FREE(subreq);
if (!ok) {
tevent_req_oom(req);
return;
}
if (!serverid_exists(&state->pid)) {
tevent_req_done(req);
return;
}
subreq = tevent_wakeup_send(
state, state->ev, tevent_timeval_current_ofs(0, 500000));
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, server_id_watch_waited, req);
}
int server_id_watch_recv(struct tevent_req *req, struct server_id *pid)
{
struct server_id_watch_state *state = tevent_req_data(
req, struct server_id_watch_state);
int err;
if (tevent_req_is_unix_error(req, &err)) {
return err;
}
if (pid) {
*pid = state->pid;
}
return 0;
}
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