1 /* $OpenBSD: nlist.c,v 1.14 2003/06/11 23:42:12 deraadt 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 1.14 2003/06/11 23:42:12 deraadt 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 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 int rval, mib[2]; 85 size_t siz; 86 87 rval = 0; 88 nlistread = 1; 89 90 if (kd != NULL && !kvm_sysctl_only) { 91 if (kvm_nlist(kd, psnl)) { 92 nlisterr(psnl); 93 eval = 1; 94 return (1); 95 } 96 if (kread(X_FSCALE, fscale)) { 97 warnx("fscale: %s", kvm_geterr(kd)); 98 eval = rval = 1; 99 } 100 if (kread(X_PHYSMEM, mempages)) { 101 warnx("physmem: %s", kvm_geterr(kd)); 102 eval = rval = 1; 103 } 104 if (kread(X_CCPU, ccpu)) { 105 warnx("ccpu: %s", kvm_geterr(kd)); 106 eval = rval = 1; 107 } 108 if (kread(X_MAXSLP, maxslp)) { 109 warnx("maxslp: %s", kvm_geterr(kd)); 110 eval = rval = 1; 111 } 112 } else { 113 siz = sizeof (fscale); 114 mib[0] = CTL_KERN; 115 mib[1] = KERN_FSCALE; 116 if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) { 117 warnx("fscale: failed to get kern.fscale"); 118 eval = rval = 1; 119 } 120 siz = sizeof (mempages); 121 mib[0] = CTL_HW; 122 mib[1] = HW_PHYSMEM; 123 if (sysctl(mib, 2, &mempages, &siz, NULL, 0) < 0) { 124 warnx("physmem: failed to get hw.physmem"); 125 eval = rval = 1; 126 } 127 mempages /= getpagesize(); /* translate bytes into page count */ 128 siz = sizeof (ccpu); 129 mib[0] = CTL_KERN; 130 mib[1] = KERN_CCPU; 131 if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) { 132 warnx("ccpu: failed to get kern.ccpu"); 133 eval = rval = 1; 134 } 135 siz = sizeof (maxslp); 136 mib[0] = CTL_VM; 137 mib[1] = VM_MAXSLP; 138 if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) { 139 warnx("maxslp: failed to get vm.maxslp"); 140 eval = rval = 1; 141 } 142 } 143 return (rval); 144 } 145 146 void 147 nlisterr(struct nlist nl[]) 148 { 149 int i; 150 151 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 152 for (i = 0; nl[i].n_name != NULL; i++) 153 if (nl[i].n_value == 0) 154 (void)fprintf(stderr, " %s", nl[i].n_name); 155 (void)fprintf(stderr, "\n"); 156 } 157