mirror of
https://github.com/samba-team/samba.git
synced 2024-12-25 23:21:54 +03:00
7d84267923
This is a brute force variant, trying twice a second. We'll have better variants with tmsgd in the future. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
|
|
* 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 "messages.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 messaging_context *msg,
|
|
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, 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,
|
|
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;
|
|
}
|