8a78a93e0c
2000-11-27 Martin Baulig <martin@home-of-linux.org> * backend-server.c (backend_server_quark): New global variable. (_open_server, _close_server): Use the quark. * commands.c: Likewise.
125 lines
3.3 KiB
C
125 lines
3.3 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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static int
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_open_server (glibtop_server *, glibtop_backend *, u_int64_t, const char **);
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static int
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_close_server (glibtop_server *, glibtop_backend *);
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static int backend_server_initialized = 0;
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GQuark backend_server_quark;
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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 *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_server_private *priv;
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if (!backend_server_initialized) {
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backend_server_quark = g_quark_from_string ("backend-server-private");
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backend_server_initialized = 1;
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}
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priv = glibtop_calloc_r (server, 1, sizeof (backend_server_private));
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g_object_set_qdata (G_OBJECT (backend), backend_server_quark, priv);
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#ifdef DEBUG
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fprintf (stderr, "open_server - %p, %p, %p\n", server, backend, priv);
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fprintf (stderr, "Opening pipe to server (%s).\n", LIBGTOP_SERVER);
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#endif
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if (pipe (priv->input) || pipe (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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priv->pid = fork ();
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if (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 (priv->pid == 0) {
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close (0); close (1);
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close (priv->input [0]);
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close (priv->output [1]);
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dup2 (priv->input [1], 1);
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dup2 (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 (priv->input [1]);
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close (priv->output [0]);
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glibtop_server_ref (server);
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priv->server = server;
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return 0;
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}
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static int
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_close_server (glibtop_server *server, glibtop_backend *backend)
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{
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backend_server_private *priv;
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priv = g_object_steal_qdata (G_OBJECT (backend), backend_server_quark);
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g_assert (priv != NULL);
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kill (priv->pid, SIGKILL);
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close (priv->input [0]);
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close (priv->output [1]);
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glibtop_server_unref (priv->server);
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priv->pid = 0;
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g_free (priv);
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return 0;
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}
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