c3a55796c2
2000-02-22 Martin Baulig <martin@home-of-linux.org> * backend-sysdeps.c (LibGTopBackendInfo): Call this `LibGTopBackendInfo_Server' when we don't use gmodule.
109 lines
2.9 KiB
C
109 lines
2.9 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 <glibtop.h>
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#include <glibtop/global.h>
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#include <glibtop/xmalloc.h>
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#include <glibtop/backend.h>
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#include <glibtop-backend-private.h>
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static int
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_open_server (glibtop *, glibtop_backend *, u_int64_t, const char **);
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static int
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_close_server (glibtop *, glibtop_backend *);
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extern glibtop_call_vector glibtop_backend_server_call_vector;
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#ifdef LIBGTOP_USE_GMODULE
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glibtop_backend_info LibGTopBackendInfo = {
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"glibtop-backend-server", _open_server, _close_server,
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&glibtop_backend_server_call_vector
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};
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#else
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glibtop_backend_info LibGTopBackendInfo_Server = {
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"glibtop-backend-server", _open_server, _close_server,
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&glibtop_backend_server_call_vector
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};
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#endif
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static int
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_open_server (glibtop *server, glibtop_backend *backend,
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u_int64_t features, const char **backend_args)
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{
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backend->_priv = glibtop_calloc_r
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(server, 1, sizeof (glibtop_backend_private));
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#ifdef DEBUG
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fprintf (stderr, "open_server - %p, %p, %p\n", server, backend,
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backend->_priv);
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fprintf (stderr, "Opening pipe to server (%s).\n",
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LIBGTOP_SERVER);
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#endif
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if (pipe (backend->_priv->input) ||
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pipe (backend->_priv->output)) {
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glibtop_warn_io_r (server, "cannot make a pipe");
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return -1;
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}
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backend->_priv->pid = fork ();
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if (backend->_priv->pid < 0) {
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glibtop_warn_io_r (server, "fork failed");
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return -1;
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} else if (backend->_priv->pid == 0) {
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close (0); close (1);
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close (backend->_priv->input [0]);
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close (backend->_priv->output [1]);
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dup2 (backend->_priv->input [1], 1);
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dup2 (backend->_priv->output [0], 0);
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execl (LIBGTOP_SERVER, "libgtop-server", NULL);
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glibtop_error_io_r (server, "execl (%s)",
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LIBGTOP_SERVER);
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_exit (2);
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}
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close (backend->_priv->input [1]);
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close (backend->_priv->output [0]);
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return 0;
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}
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static int
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_close_server (glibtop *server, glibtop_backend *backend)
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{
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kill (backend->_priv->pid, SIGKILL);
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close (backend->_priv->input [0]);
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close (backend->_priv->output [1]);
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backend->_priv->pid = 0;
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return 0;
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}
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