93 lines
2.5 KiB
C
93 lines
2.5 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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static const unsigned long _glibtop_sysdeps_loadavg_tasks =
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(1 << GLIBTOP_LOADAVG_NR_RUNNING) +
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(1 << GLIBTOP_LOADAVG_NR_TASKS) +
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(1 << GLIBTOP_LOADAVG_LAST_PID);
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/* Init function. */
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void
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glibtop_init_loadavg_s (glibtop *server)
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{
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server->sysdeps.loadavg = _glibtop_sysdeps_loadavg;
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}
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/* Provides load load averange. */
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#define FILENAME "/proc/loadavg"
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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], *p, *old;
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int fd, len;
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glibtop_init_s (&server, GLIBTOP_SYSDEPS_LOADAVG, 0);
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memset (buf, 0, sizeof (glibtop_loadavg));
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fd = open (FILENAME, O_RDONLY);
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if (fd < 0)
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glibtop_error_io_r (server, "open (%s)", FILENAME);
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len = read (fd, buffer, BUFSIZ-1);
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if (len < 0)
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glibtop_error_io_r (server, "read (%s)", FILENAME);
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close (fd);
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buffer [len] = '\0';
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buf->loadavg [0] = (float) strtod (buffer, &p);
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buf->loadavg [1] = (float) strtod (p, &p);
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buf->loadavg [2] = (float) strtod (p, &p);
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buf->flags = _glibtop_sysdeps_loadavg;
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while (isspace(*p)) p++;
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/* Older Linux versions don't have the nr_running/nr_tasks fields. */
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old = p;
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while (*p) {
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if (*p == '/')
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break;
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if (!isdigit (*p))
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return;
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p++;
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}
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buf->nr_running = strtoul (old, &p, 0); p++;
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buf->nr_tasks = strtoul (p, &p, 0);
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buf->last_pid = strtoul (p, &p, 0);
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buf->flags |= _glibtop_sysdeps_loadavg_tasks;
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}
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