4c8ae9e25c
2003-10-19 Carlos Perelló Marín <carlos@gnome.org> * support/*: Reverted libgtop changes. It's a common module and I should not modify it. * Added/removed files. Now the move should be done.
110 lines
3.0 KiB
C
110 lines
3.0 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 <glibtop.h>
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#include <glibtop/cpu.h>
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#include <glibtop/open.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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#define LINUX_VERSION(x,y,z) (0x10000*(x) + 0x100*(y) + z)
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static int linux_version_code = 0;
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static void set_linux_version(void) {
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static struct utsname uts;
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int x = 0, y = 0, z = 0; /* cleared in case sscanf() < 3 */
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if (linux_version_code) return;
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if (uname(&uts) == -1) /* failure most likely implies impending death */
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exit(1);
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if (sscanf(uts.release, "%d.%d.%d", &x, &y, &z) < 3)
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fprintf(stderr, /* *very* unlikely to happen by accident */
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"Non-standard uts for running kernel:\n"
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"release %s=%d.%d.%d gives version code %d\n",
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uts.release, x, y, z, LINUX_VERSION(x,y,z));
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linux_version_code = LINUX_VERSION(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;
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struct stat statb;
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int fd, len, i;
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server->name = program_name;
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set_linux_version ();
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server->os_version_code = (unsigned long) linux_version_code;
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server->ncpu = 0;
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/* On Linux 2.4.x, /proc/stat has "cpu" and "cpu0" entries even
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* for non-SMP systems. Checking whether /proc/<pid>/cpu exists
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* is a much better way to detect SMP. */
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if (stat ("/proc/1/cpu", &statb))
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return;
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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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p = skip_multiple_token (buffer, 5) + 1;
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for (i = 0; i < GLIBTOP_NCPU; i++) {
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if (strncmp (p, "cpu", 3) || !isdigit (p [3]))
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break;
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server->ncpu++;
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p = skip_multiple_token (p, 5) + 1;
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}
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#if DEBUG
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printf ("\nThis machine has %d CPUs.\n\n", server->ncpu);
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#endif
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}
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