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Initial version of the "glibtop-backend-server" backend.

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2000-01-01  Martin Baulig  <martin@home-of-linux.org>

	Initial version of the "glibtop-backend-server" backend.

	* command.c, read.c, read_data.c, write.c: New files. Moved here
	from the `lib' directory.

	* backend-server.c: New file.
	* glibtop-backend-private.h: New file.

	* marshal.pl: New file. Automatically creates `marshal.c'.
This commit is contained in:
Martin Baulig
2000-01-01 20:54:10 +00:00
committed by Martin Baulig
parent 945ec9b0b1
commit a567f1a8d1
10 changed files with 703 additions and 0 deletions
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99
backends/server/backend-server.c Normal file
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* $Id$ */
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop 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 2 of the License,
or (at your option) any later version.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <glibtop.h>
#include <glibtop/global.h>
#include <glibtop/xmalloc.h>
#include <glibtop/backend.h>
#include <glibtop-backend-private.h>
static int
_open_server (glibtop *, glibtop_backend *, u_int64_t, const char **);
static int
_close_server (glibtop *, glibtop_backend *);
extern glibtop_call_vector glibtop_backend_server_call_vector;
glibtop_backend_info glibtop_backend_server = {
"glibtop-backend-server", _open_server, _close_server,
&glibtop_backend_server_call_vector
};
static int
_open_server (glibtop *server, glibtop_backend *backend,
u_int64_t features, const char **backend_args)
{
backend->_priv = glibtop_calloc_r
(server, 1, sizeof (glibtop_backend_private));
fprintf (stderr, "open_server - %p, %p, %p\n", server, backend,
backend->_priv);
fprintf (stderr, "Opening pipe to server (%s).\n",
LIBGTOP_SERVER);
if (pipe (backend->_priv->input) ||
pipe (backend->_priv->output)) {
glibtop_warn_io_r (server, "cannot make a pipe");
return -1;
}
backend->_priv->pid = fork ();
if (backend->_priv->pid < 0) {
glibtop_warn_io_r (server, "fork failed");
return -1;
} else if (backend->_priv->pid == 0) {
close (0); close (1);
close (backend->_priv->input [0]);
close (backend->_priv->output [1]);
dup2 (backend->_priv->input [1], 1);
dup2 (backend->_priv->output [0], 0);
execl (LIBGTOP_SERVER, "libgtop-server", NULL);
glibtop_error_io_r (server, "execl (%s)",
LIBGTOP_SERVER);
_exit (2);
}
close (backend->_priv->input [1]);
close (backend->_priv->output [0]);
return 0;
}
static int
_close_server (glibtop *server, glibtop_backend *backend)
{
kill (backend->_priv->pid, SIGKILL);
close (backend->_priv->input [0]);
close (backend->_priv->output [1]);
backend->_priv->pid = 0;
return 0;
}