72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <config.h>
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#include <glibtop/error.h>
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#include <glibtop/loadavg.h>
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static const unsigned long _glibtop_sysdeps_loadavg =
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(1 << GLIBTOP_LOADAVG_LOADAVG);
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#define FILENAME "/proc/loadavg"
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/* Provides load load averange. */
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void
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glibtop_get_loadavg_s (glibtop *server, glibtop_loadavg *buf)
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{
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char buffer [BUFSIZ], *tmp;
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int fd = 0, ret;
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glibtop_init_r (&server, 0, 0);
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memset (buf, 0, sizeof (glibtop_loadavg));
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buf->flags = _glibtop_sysdeps_loadavg;
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#ifdef GLIBTOP_CACHE_OPEN
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fd = server->machine.fd_loadavg;
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#endif
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if (fd == 0) {
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fd = open (FILENAME, O_RDONLY);
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if (fd == -1)
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glibtop_error_r (server, "open (%s): %s",
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FILENAME, strerror (errno));
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} else {
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lseek (fd, 0, SEEK_SET);
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}
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ret = read (fd, buffer, BUFSIZ);
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if (ret == -1)
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glibtop_error_r (server, "read (%s): %s",
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FILENAME, strerror (errno));
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buf->loadavg [0] = strtod (buffer, &tmp);
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buf->loadavg [1] = strtod (tmp, &tmp);
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buf->loadavg [2] = strtod (tmp, &tmp);
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#ifdef GLIBTOP_CACHE_OPEN
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server->machine.fd_loadavg = fd;
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#else
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close (fd);
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#endif
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}
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