101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <backend-server.h>
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#include "command.h"
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void *
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glibtop_call_i (glibtop_server *server, backend_server_private *priv,
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unsigned command, size_t send_size, const void *send_buf,
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size_t data_size, const void *data_buf,
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size_t recv_size, void *recv_ptr,
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int *retval_ptr)
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{
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glibtop_command cmnd;
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glibtop_response resp;
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#if 0
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int retval;
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#endif
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memset (&cmnd, 0, sizeof (glibtop_command));
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memset (&resp, 0, sizeof (glibtop_response));
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cmnd.command = command;
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/* If send_size is less than _GLIBTOP_PARAM_SIZE (normally 16 Bytes), we
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* send it together with command, so we only need one system call instead
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* of two. */
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if (send_size <= _GLIBTOP_PARAM_SIZE) {
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memcpy (cmnd.parameter, send_buf, send_size);
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cmnd.param_size = send_size;
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} else {
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cmnd.send_size = send_size;
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}
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cmnd.data_size = data_size;
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glibtop_write_i (priv, sizeof (glibtop_command), &cmnd);
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if (data_size) {
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#ifdef SLAVE_DEBUG
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fprintf (stderr, "SENDING %d bytes of DATA.\n", data_size);
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#endif
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glibtop_write_i (priv, data_size, data_buf);
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}
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glibtop_read_i (priv, sizeof (glibtop_response), &resp);
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#ifdef SLAVE_DEBUG
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fprintf (stderr, "RESPONSE: %d - %d - %ld - %ld - %p - %ld\n",
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resp.retval, resp.glibtop_errno,
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(long) resp.recv_size, (long) resp.data_size,
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recv_ptr, (long) recv_size);
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#endif
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if (retval_ptr)
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*retval_ptr = resp.glibtop_errno;
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if (resp.recv_size != recv_size) {
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glibtop_warn_r (server, "Expected %ld bytes, but got %ld.",
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(long) recv_size, (long) resp.recv_size);
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return NULL;
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}
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if (recv_ptr)
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glibtop_read_i (priv, recv_size, recv_ptr);
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if (resp.data_size) {
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void *ptr = g_malloc (resp.data_size);
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glibtop_read_i (priv, resp.data_size, ptr);
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return ptr;
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}
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return NULL;
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}
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