e296c3a37a
* open.c: (glibtop_open_s): Implemented server->real_ncpu. Add a warning to display ncpu and real_ncpu on open.
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* $Id$ */
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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 <config.h>
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#include <glibtop.h>
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#include <glibtop/cpu.h>
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#include <glibtop/open.h>
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#include <glibtop/error.h>
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#include "glibtop_private.h"
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/* =====================================================
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* Linux kernel version information for procps utilities
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* Copyright (c) 1996 Charles Blake <cblake@bbn.com>
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*/
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#include <sys/utsname.h>
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static void set_linux_version(glibtop *server)
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{
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struct utsname uts;
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unsigned x = 0, y = 0, z = 0; /* cleared in case sscanf() < 3 */
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if (uname(&uts) == -1) /* failure most likely implies impending death */
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glibtop_error_r(server, "uname() failed");
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if (sscanf(uts.release, "%u.%u.%u", &x, &y, &z) < 3)
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glibtop_warn_r(server,
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"Non-standard uts for running kernel:\n"
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"release %s=%u.%u.%u gives version code %d\n",
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uts.release, x, y, z, LINUX_VERSION_CODE(x,y,z));
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if (LINUX_VERSION_CODE(x, y, z) >= LINUX_VERSION_CODE(2, 6, 0)
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&& !g_file_test("/sys", G_FILE_TEST_IS_DIR))
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glibtop_warn_r(server,
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"You're running a 2.6 kernel without /sys."
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"You should mount it.");
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server->os_version_code = LINUX_VERSION_CODE(x, y, z);
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}
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/* ======================================================= */
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/* Opens pipe to gtop server. Returns 0 on success and -1 on error. */
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#define FILENAME "/proc/stat"
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void
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glibtop_open_s (glibtop *server, const char *program_name,
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const unsigned long features,
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const unsigned flags)
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{
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char buffer [BUFSIZ], *p = buffer;
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server->name = program_name;
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set_linux_version(server);
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file_to_buffer(server, buffer, FILENAME);
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p = skip_line(p); /* cpu */
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for (server->real_ncpu = 0; /* nop */; server->real_ncpu++) {
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if (!check_cpu_line(server, p, server->real_ncpu)) {
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server->real_ncpu--;
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break;
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}
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p = skip_line(p);
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}
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server->ncpu = MIN(GLIBTOP_NCPU - 1, server->real_ncpu);
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glibtop_warn_r(server,
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"This machine has %d CPUs, "
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"%d are being monitored.",
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server->real_ncpu + 1,
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server->ncpu + 1);
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}
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