1 /* $OpenBSD: nlist.c,v 1.19 2015/01/16 06:39:32 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 #include <sys/param.h> /* MAXCOMLEN */ 34 #include <sys/time.h> 35 #include <sys/signal.h> 36 #include <sys/proc.h> 37 #include <sys/resource.h> 38 #include <sys/sysctl.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <kvm.h> 43 #include <nlist.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "ps.h" 49 50 struct nlist psnl[] = { 51 {"_fscale"}, 52 #define X_FSCALE 0 53 {"_ccpu"}, 54 #define X_CCPU 1 55 {"_physmem"}, 56 #define X_PHYSMEM 2 57 {"_maxslp"}, 58 #define X_MAXSLP 3 59 {NULL} 60 }; 61 62 fixpt_t ccpu; /* kernel _ccpu variable */ 63 int nlistread; /* if nlist already read. */ 64 u_int mempages; /* number of pages of phys. memory */ 65 int fscale; /* kernel _fscale variable */ 66 int maxslp; 67 68 extern kvm_t *kd; 69 70 #define kread(x, v) \ 71 kvm_read(kd, psnl[x].n_value, &v, sizeof v) != sizeof(v) 72 73 int 74 donlist(void) 75 { 76 int64_t physmem; 77 int rval, mib[2]; 78 size_t siz; 79 80 rval = 0; 81 nlistread = 1; 82 83 if (kd != NULL && !kvm_sysctl_only) { 84 if (kvm_nlist(kd, psnl)) { 85 nlisterr(psnl); 86 eval = 1; 87 return (1); 88 } 89 if (kread(X_FSCALE, fscale)) { 90 warnx("fscale: %s", kvm_geterr(kd)); 91 eval = rval = 1; 92 } 93 if (kread(X_PHYSMEM, mempages)) { 94 warnx("physmem: %s", kvm_geterr(kd)); 95 eval = rval = 1; 96 } 97 if (kread(X_CCPU, ccpu)) { 98 warnx("ccpu: %s", kvm_geterr(kd)); 99 eval = rval = 1; 100 } 101 if (kread(X_MAXSLP, maxslp)) { 102 warnx("maxslp: %s", kvm_geterr(kd)); 103 eval = rval = 1; 104 } 105 } else { 106 siz = sizeof (fscale); 107 mib[0] = CTL_KERN; 108 mib[1] = KERN_FSCALE; 109 if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) { 110 warnx("fscale: failed to get kern.fscale"); 111 eval = rval = 1; 112 } 113 siz = sizeof (physmem); 114 mib[0] = CTL_HW; 115 mib[1] = HW_PHYSMEM64; 116 if (sysctl(mib, 2, &physmem, &siz, NULL, 0) < 0) { 117 warnx("physmem: failed to get hw.physmem"); 118 eval = rval = 1; 119 } 120 /* translate bytes into page count */ 121 mempages = physmem / getpagesize(); 122 siz = sizeof (ccpu); 123 mib[0] = CTL_KERN; 124 mib[1] = KERN_CCPU; 125 if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) { 126 warnx("ccpu: failed to get kern.ccpu"); 127 eval = rval = 1; 128 } 129 siz = sizeof (maxslp); 130 mib[0] = CTL_VM; 131 mib[1] = VM_MAXSLP; 132 if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) { 133 warnx("maxslp: failed to get vm.maxslp"); 134 eval = rval = 1; 135 } 136 } 137 return (rval); 138 } 139 140 void 141 nlisterr(struct nlist nl[]) 142 { 143 int i; 144 145 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 146 for (i = 0; nl[i].n_name != NULL; i++) 147 if (nl[i].n_value == 0) 148 (void)fprintf(stderr, " %s", nl[i].n_name); 149 (void)fprintf(stderr, "\n"); 150 } 151