source: vendor/current/lib/util/tevent_unix.c

/*
   Unix SMB/CIFS implementation.
   Wrap unix errno around tevent_req
   Copyright (C) Volker Lendecke 2009

     ** NOTE! The following LGPL license applies to the tevent_unix
     ** helper library. This does NOT imply that all of Samba is released
     ** under the LGPL

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "../replace/replace.h"
#include "tevent_unix.h"

bool tevent_req_is_unix_error(struct tevent_req *req, int *perrno)
{
        enum tevent_req_state state;
        uint64_t err;

        if (!tevent_req_is_error(req, &state, &err)) {
                return false;
        }
        switch (state) {
        case TEVENT_REQ_TIMED_OUT:
                *perrno = ETIMEDOUT;
                break;
        case TEVENT_REQ_NO_MEMORY:
                *perrno = ENOMEM;
                break;
        case TEVENT_REQ_USER_ERROR:
                *perrno = err;
                break;
        default:
                *perrno = EINVAL;
                break;
        }
        return true;
}

int tevent_req_simple_recv_unix(struct tevent_req *req)
{
        int err = 0;

        /*
         * Ignore result of tevent_req_is_unix_error, we're only interested in
         * the status
         */
        tevent_req_is_unix_error(req, &err);
        tevent_req_received(req);
        return err;
}

bool tevent_req_poll_unix(struct tevent_req *req, struct tevent_context *ev,
                          int *err)
{
        bool ret = tevent_req_poll(req, ev);
        if (!ret) {
                *err = errno;
        }
        return ret;
}