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nlist.c revision 1.11 
      1 /*	$NetBSD: nlist.c,v 1.11 1995/03/21 09:08:03 cgd Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990, 1993, 1994
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)nlist.c	8.4 (Berkeley) 4/2/94";
     39 #else
     40 static char rcsid[] = "$NetBSD: nlist.c,v 1.11 1995/03/21 09:08:03 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 #include <sys/param.h>
     45 #include <sys/time.h>
     46 #include <sys/proc.h>
     47 #include <sys/resource.h>
     48 
     49 #include <err.h>
     50 #include <errno.h>
     51 #include <kvm.h>
     52 #include <nlist.h>
     53 #include <stdio.h>
     54 #include <string.h>
     55 #include <unistd.h>
     56 
     57 #include "ps.h"
     58 
     59 #ifdef P_PPWAIT
     60 #define NEWVM
     61 #endif
     62 
     63 struct	nlist psnl[] = {
     64 	{"_fscale"},
     65 #define	X_FSCALE	0
     66 	{"_ccpu"},
     67 #define	X_CCPU		1
     68 #ifdef NEWVM
     69 	{"_avail_start"},
     70 #define	X_AVAILSTART	2
     71 	{"_avail_end"},
     72 #define	X_AVAILEND	3
     73 #else
     74 	{"_ecmx"},
     75 #define	X_ECMX		2
     76 #endif
     77 	{NULL}
     78 };
     79 
     80 fixpt_t	ccpu;				/* kernel _ccpu variable */
     81 int	nlistread;			/* if nlist already read. */
     82 int	mempages;			/* number of pages of phys. memory */
     83 int	fscale;				/* kernel _fscale variable */
     84 
     85 extern kvm_t *kd;
     86 
     87 #define kread(x, v) \
     88 	kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
     89 
     90 int
     91 donlist()
     92 {
     93 	int rval;
     94 #ifdef NEWVM
     95 	int tmp;
     96 #endif
     97 
     98 	rval = 0;
     99 	nlistread = 1;
    100 	if (kvm_nlist(kd, psnl)) {
    101 		nlisterr(psnl);
    102 		eval = 1;
    103 		return (1);
    104 	}
    105 	if (kread(X_FSCALE, fscale)) {
    106 		warnx("fscale: %s", kvm_geterr(kd));
    107 		eval = rval = 1;
    108 	}
    109 #ifdef NEWVM
    110 	if (kread(X_AVAILEND, mempages)) {
    111 		warnx("avail_start: %s", kvm_geterr(kd));
    112 		eval = rval = 1;
    113 	}
    114 	if (kread(X_AVAILSTART, tmp)) {
    115 		warnx("avail_end: %s", kvm_geterr(kd));
    116 		eval = rval = 1;
    117 	}
    118 	mempages -= tmp;
    119 	mempages /= getpagesize();
    120 #else
    121 	if (kread(X_ECMX, mempages)) {
    122 		warnx("ecmx: %s", kvm_geterr(kd));
    123 		eval = rval = 1;
    124 	}
    125 #endif
    126 	if (kread(X_CCPU, ccpu)) {
    127 		warnx("ccpu: %s", kvm_geterr(kd));
    128 		eval = rval = 1;
    129 	}
    130 	return (rval);
    131 }
    132 
    133 void
    134 nlisterr(nl)
    135 	struct nlist nl[];
    136 {
    137 	int i;
    138 
    139 	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
    140 	for (i = 0; nl[i].n_name != NULL; i++)
    141 		if (nl[i].n_value == 0)
    142 			(void)fprintf(stderr, " %s", nl[i].n_name);
    143 	(void)fprintf(stderr, "\n");
    144 }
    145