sysinfo.c

来自「linux 操作系统下对系统资源监控程序的编写」· C语言 代码 · 共 95 行

/* $Id: sysinfo.c,v 1.10 2003/10/19 16:55:39 carlos Exp $ */

/* Copyright (C) 1998-99 Martin Baulig
   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <[e-mail]>, 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 <config.h>
#include <glibtop/cpu.h>
#include <glibtop/sysinfo.h>

static const unsigned long _glibtop_sysdeps_sysinfo =
(1L << GLIBTOP_SYSINFO_CPUINFO);

static glibtop_sysinfo sysinfo;

static void
init_sysinfo (glibtop *server)
{
	char buffer [BUFSIZ];
	static int init = 0;
	glibtop_entry *cpuinfo = NULL;
	FILE *f;

	if (init) return;

	init = TRUE;

	glibtop_init_s (&server, GLIBTOP_SYSDEPS_CPU, 0);

	memset (&sysinfo, 0, sizeof (glibtop_sysinfo));

	g_return_if_fail (f = fopen ("/proc/cpuinfo", "r"));

	while (fgets (buffer, BUFSIZ, f)) {
		char *p, *start, *key, *value;

		if (cpuinfo == NULL) {
			cpuinfo = &sysinfo.cpuinfo [sysinfo.ncpu++];

			cpuinfo->labels = g_ptr_array_new ();

			cpuinfo->values = g_hash_table_new (NULL, NULL);
			
			if (sysinfo.ncpu > GLIBTOP_NCPU)
				sysinfo.ncpu = GLIBTOP_NCPU;
		}

		p = strchr (buffer, ':');
		if (!p) continue;

		/* Remove leading spaces from `p'. */
		*p = '\0'; start = p; p++;
		while (isspace (*p)) p++;

		/* Remove trailing spaces from `buffer'. */
		while ((start > buffer) && (*start) && isspace (*start))
			*start-- = '\0';

		key = g_strdup (buffer);
		value = g_strdup (p);

		g_ptr_array_add (cpuinfo->labels, key);

		g_hash_table_insert (cpuinfo->values, key, value);
	}

	fclose (f);

	sysinfo.flags = _glibtop_sysdeps_sysinfo;
}

glibtop_sysinfo *
glibtop_get_sysinfo_s (glibtop *server)
{
	init_sysinfo (server);
	return &sysinfo;
}