Home | History | Annotate | Line # | Download | only in ps
nlist.c revision 1.12 
      1 /*	$NetBSD: nlist.c,v 1.12 1997/07/20 20:37:55 christos 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)nlist.c	8.4 (Berkeley) 4/2/94";
     40 #else
     41 __RCSID("$NetBSD: nlist.c,v 1.12 1997/07/20 20:37:55 christos Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/time.h>
     47 #include <sys/proc.h>
     48 #include <sys/resource.h>
     49 
     50 #include <err.h>
     51 #include <errno.h>
     52 #include <kvm.h>
     53 #include <nlist.h>
     54 #include <stdio.h>
     55 #include <string.h>
     56 #include <unistd.h>
     57 
     58 #include "ps.h"
     59 
     60 #ifdef P_PPWAIT
     61 #define NEWVM
     62 #endif
     63 
     64 struct	nlist psnl[] = {
     65 	{"_fscale"},
     66 #define	X_FSCALE	0
     67 	{"_ccpu"},
     68 #define	X_CCPU		1
     69 #ifdef NEWVM
     70 	{"_avail_start"},
     71 #define	X_AVAILSTART	2
     72 	{"_avail_end"},
     73 #define	X_AVAILEND	3
     74 #else
     75 	{"_ecmx"},
     76 #define	X_ECMX		2
     77 #endif
     78 	{NULL}
     79 };
     80 
     81 fixpt_t	ccpu;				/* kernel _ccpu variable */
     82 int	nlistread;			/* if nlist already read. */
     83 int	mempages;			/* number of pages of phys. memory */
     84 int	fscale;				/* kernel _fscale variable */
     85 
     86 extern kvm_t *kd;
     87 
     88 #define kread(x, v) \
     89 	kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
     90 
     91 int
     92 donlist()
     93 {
     94 	int rval;
     95 #ifdef NEWVM
     96 	int tmp;
     97 #endif
     98 
     99 	rval = 0;
    100 	nlistread = 1;
    101 	if (kvm_nlist(kd, psnl)) {
    102 		nlisterr(psnl);
    103 		eval = 1;
    104 		return (1);
    105 	}
    106 	if (kread(X_FSCALE, fscale)) {
    107 		warnx("fscale: %s", kvm_geterr(kd));
    108 		eval = rval = 1;
    109 	}
    110 #ifdef NEWVM
    111 	if (kread(X_AVAILEND, mempages)) {
    112 		warnx("avail_start: %s", kvm_geterr(kd));
    113 		eval = rval = 1;
    114 	}
    115 	if (kread(X_AVAILSTART, tmp)) {
    116 		warnx("avail_end: %s", kvm_geterr(kd));
    117 		eval = rval = 1;
    118 	}
    119 	mempages -= tmp;
    120 	mempages /= getpagesize();
    121 #else
    122 	if (kread(X_ECMX, mempages)) {
    123 		warnx("ecmx: %s", kvm_geterr(kd));
    124 		eval = rval = 1;
    125 	}
    126 #endif
    127 	if (kread(X_CCPU, ccpu)) {
    128 		warnx("ccpu: %s", kvm_geterr(kd));
    129 		eval = rval = 1;
    130 	}
    131 	return (rval);
    132 }
    133 
    134 void
    135 nlisterr(nl)
    136 	struct nlist nl[];
    137 {
    138 	int i;
    139 
    140 	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
    141 	for (i = 0; nl[i].n_name != NULL; i++)
    142 		if (nl[i].n_value == 0)
    143 			(void)fprintf(stderr, " %s", nl[i].n_name);
    144 	(void)fprintf(stderr, "\n");
    145 }
    146