1 /* $OpenBSD: nlist.c,v 1.16 2008/02/10 16:56:13 kettenis Exp $ */ 2 /* $NetBSD: nlist.c,v 1.11 1995/03/21 09:08:03 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1990, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)nlist.c 8.4 (Berkeley) 4/2/94"; 36 #else 37 static char rcsid[] = "$OpenBSD: nlist.c,v 1.16 2008/02/10 16:56:13 kettenis Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/proc.h> 44 #include <sys/resource.h> 45 #include <sys/sysctl.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <kvm.h> 50 #include <nlist.h> 51 #include <stdio.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "ps.h" 56 57 struct nlist psnl[] = { 58 {"_fscale"}, 59 #define X_FSCALE 0 60 {"_ccpu"}, 61 #define X_CCPU 1 62 {"_physmem"}, 63 #define X_PHYSMEM 2 64 {"_maxslp"}, 65 #define X_MAXSLP 3 66 {NULL} 67 }; 68 69 fixpt_t ccpu; /* kernel _ccpu variable */ 70 int nlistread; /* if nlist already read. */ 71 u_int mempages; /* number of pages of phys. memory */ 72 int fscale; /* kernel _fscale variable */ 73 int maxslp; 74 75 extern kvm_t *kd; 76 extern int kvm_sysctl_only; 77 78 #define kread(x, v) \ 79 kvm_read(kd, psnl[x].n_value, &v, sizeof v) != sizeof(v) 80 81 int 82 donlist(void) 83 { 84 int64_t physmem; 85 int rval, mib[2]; 86 size_t siz; 87 88 rval = 0; 89 nlistread = 1; 90 91 if (kd != NULL && !kvm_sysctl_only) { 92 if (kvm_nlist(kd, psnl)) { 93 nlisterr(psnl); 94 eval = 1; 95 return (1); 96 } 97 if (kread(X_FSCALE, fscale)) { 98 warnx("fscale: %s", kvm_geterr(kd)); 99 eval = rval = 1; 100 } 101 if (kread(X_PHYSMEM, mempages)) { 102 warnx("physmem: %s", kvm_geterr(kd)); 103 eval = rval = 1; 104 } 105 if (kread(X_CCPU, ccpu)) { 106 warnx("ccpu: %s", kvm_geterr(kd)); 107 eval = rval = 1; 108 } 109 if (kread(X_MAXSLP, maxslp)) { 110 warnx("maxslp: %s", kvm_geterr(kd)); 111 eval = rval = 1; 112 } 113 } else { 114 siz = sizeof (fscale); 115 mib[0] = CTL_KERN; 116 mib[1] = KERN_FSCALE; 117 if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) { 118 warnx("fscale: failed to get kern.fscale"); 119 eval = rval = 1; 120 } 121 siz = sizeof (physmem); 122 mib[0] = CTL_HW; 123 mib[1] = HW_PHYSMEM64; 124 if (sysctl(mib, 2, &physmem, &siz, NULL, 0) < 0) { 125 warnx("physmem: failed to get hw.physmem"); 126 eval = rval = 1; 127 } 128 /* translate bytes into page count */ 129 mempages = physmem / getpagesize(); 130 siz = sizeof (ccpu); 131 mib[0] = CTL_KERN; 132 mib[1] = KERN_CCPU; 133 if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) { 134 warnx("ccpu: failed to get kern.ccpu"); 135 eval = rval = 1; 136 } 137 siz = sizeof (maxslp); 138 mib[0] = CTL_VM; 139 mib[1] = VM_MAXSLP; 140 if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) { 141 warnx("maxslp: failed to get vm.maxslp"); 142 eval = rval = 1; 143 } 144 } 145 return (rval); 146 } 147 148 void 149 nlisterr(struct nlist nl[]) 150 { 151 int i; 152 153 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 154 for (i = 0; nl[i].n_name != NULL; i++) 155 if (nl[i].n_value == 0) 156 (void)fprintf(stderr, " %s", nl[i].n_name); 157 (void)fprintf(stderr, "\n"); 158 } 159