adv_cmds/ps/nlist.c

   1 /*-
   2  * Copyright (c) 1990, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if 0
  31 #ifndef lint
  32 static char sccsid[] = "@(#)nlist.c     8.4 (Berkeley) 4/2/94";
  33 #endif /* not lint */
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD: src/bin/ps/nlist.c,v 1.21 2004/04/06 20:06:49 markm Exp $");
  38
  39 #include <sys/types.h>
  40 #include <sys/sysctl.h>
  41 #ifdef __APPLE__
  42 #include <sys/resource.h>
  43 #endif
  44
  45 #include <stddef.h>
  46
  47 #include "ps.h"
  48
  49 fixpt_t ccpu;                           /* kernel _ccpu variable */
  50 int     nlistread;                      /* if nlist already read. */
  51 #ifdef __APPLE__
  52 uint64_t        mempages;               /* number of pages of phys. memory */
  53 #else
  54 unsigned long   mempages;               /* number of pages of phys. memory */
  55 #endif
  56 int     fscale;                         /* kernel _fscale variable */
  57
  58 int
  59 donlist(void)
  60 {
  61 #ifdef __APPLE__
  62         int mib[2];
  63 #endif
  64         size_t oldlen;
  65
  66 #ifdef __APPLE__
  67         mib[0] = CTL_HW;
  68         mib[1] = HW_MEMSIZE;
  69         oldlen = sizeof(mempages);
  70         if (sysctl(mib, 2, &mempages, &oldlen, NULL, 0) == -1)
  71                 return (1);
  72         fscale = 100;
  73 #else
  74         oldlen = sizeof(ccpu);
  75         if (sysctlbyname("kern.ccpu", &ccpu, &oldlen, NULL, 0) == -1)
  76                 return (1);
  77         oldlen = sizeof(fscale);
  78         if (sysctlbyname("kern.fscale", &fscale, &oldlen, NULL, 0) == -1)
  79                 return (1);
  80         oldlen = sizeof(mempages);
  81         if (sysctlbyname("hw.availpages", &mempages, &oldlen, NULL, 0) == -1)
  82                 return (1);
  83 #endif
  84         nlistread = 1;
  85         return (0);
  86 }