1 /* $NetBSD: nlist.c,v 1.14 1998/03/27 22:45:47 is 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 1.14 1998/03/27 22:45:47 is 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 struct nlist psnl[] = { 61 { "_fscale" }, 62 #define X_FSCALE 0 63 { "_ccpu" }, 64 #define X_CCPU 1 65 { "_physmem" }, 66 #define X_PHYSMEM 2 67 { NULL } 68 }; 69 70 fixpt_t ccpu; /* kernel _ccpu variable */ 71 int nlistread; /* if nlist already read. */ 72 int mempages; /* number of pages of phys. memory */ 73 int fscale; /* kernel _fscale variable */ 74 75 extern kvm_t *kd; 76 77 #define kread(x, v) \ 78 kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v) 79 80 int 81 donlist() 82 { 83 int rval; 84 85 rval = 0; 86 nlistread = 1; 87 if (kvm_nlist(kd, psnl)) { 88 nlisterr(psnl); 89 eval = 1; 90 return (1); 91 } 92 if (kread(X_FSCALE, fscale)) { 93 warnx("fscale: %s", kvm_geterr(kd)); 94 eval = rval = 1; 95 } 96 if (kread(X_PHYSMEM, mempages)) { 97 warnx("avail_start: %s", kvm_geterr(kd)); 98 eval = rval = 1; 99 } 100 if (kread(X_CCPU, ccpu)) { 101 warnx("ccpu: %s", kvm_geterr(kd)); 102 eval = rval = 1; 103 } 104 return (rval); 105 } 106 107 void 108 nlisterr(nl) 109 struct nlist nl[]; 110 { 111 int i; 112 113 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 114 for (i = 0; nl[i].n_name != NULL; i++) 115 if (nl[i].n_value == 0) 116 (void)fprintf(stderr, " %s", nl[i].n_name); 117 (void)fprintf(stderr, "\n"); 118 } 119