1 /* $OpenBSD: nlist.c,v 1.18 2011/12/11 00:16:49 nicm 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> 34 #include <sys/time.h> 35 #include <sys/proc.h> 36 #include <sys/resource.h> 37 #include <sys/sysctl.h> 38 39 #include <err.h> 40 #include <errno.h> 41 #include <kvm.h> 42 #include <nlist.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include "ps.h" 48 49 struct nlist psnl[] = { 50 {"_fscale"}, 51 #define X_FSCALE 0 52 {"_ccpu"}, 53 #define X_CCPU 1 54 {"_physmem"}, 55 #define X_PHYSMEM 2 56 {"_maxslp"}, 57 #define X_MAXSLP 3 58 {NULL} 59 }; 60 61 fixpt_t ccpu; /* kernel _ccpu variable */ 62 int nlistread; /* if nlist already read. */ 63 u_int mempages; /* number of pages of phys. memory */ 64 int fscale; /* kernel _fscale variable */ 65 int maxslp; 66 67 extern kvm_t *kd; 68 69 #define kread(x, v) \ 70 kvm_read(kd, psnl[x].n_value, &v, sizeof v) != sizeof(v) 71 72 int 73 donlist(void) 74 { 75 int64_t physmem; 76 int rval, mib[2]; 77 size_t siz; 78 79 rval = 0; 80 nlistread = 1; 81 82 if (kd != NULL && !kvm_sysctl_only) { 83 if (kvm_nlist(kd, psnl)) { 84 nlisterr(psnl); 85 eval = 1; 86 return (1); 87 } 88 if (kread(X_FSCALE, fscale)) { 89 warnx("fscale: %s", kvm_geterr(kd)); 90 eval = rval = 1; 91 } 92 if (kread(X_PHYSMEM, mempages)) { 93 warnx("physmem: %s", kvm_geterr(kd)); 94 eval = rval = 1; 95 } 96 if (kread(X_CCPU, ccpu)) { 97 warnx("ccpu: %s", kvm_geterr(kd)); 98 eval = rval = 1; 99 } 100 if (kread(X_MAXSLP, maxslp)) { 101 warnx("maxslp: %s", kvm_geterr(kd)); 102 eval = rval = 1; 103 } 104 } else { 105 siz = sizeof (fscale); 106 mib[0] = CTL_KERN; 107 mib[1] = KERN_FSCALE; 108 if (sysctl(mib, 2, &fscale, &siz, NULL, 0) < 0) { 109 warnx("fscale: failed to get kern.fscale"); 110 eval = rval = 1; 111 } 112 siz = sizeof (physmem); 113 mib[0] = CTL_HW; 114 mib[1] = HW_PHYSMEM64; 115 if (sysctl(mib, 2, &physmem, &siz, NULL, 0) < 0) { 116 warnx("physmem: failed to get hw.physmem"); 117 eval = rval = 1; 118 } 119 /* translate bytes into page count */ 120 mempages = physmem / getpagesize(); 121 siz = sizeof (ccpu); 122 mib[0] = CTL_KERN; 123 mib[1] = KERN_CCPU; 124 if (sysctl(mib, 2, &ccpu, &siz, NULL, 0) < 0) { 125 warnx("ccpu: failed to get kern.ccpu"); 126 eval = rval = 1; 127 } 128 siz = sizeof (maxslp); 129 mib[0] = CTL_VM; 130 mib[1] = VM_MAXSLP; 131 if (sysctl(mib, 2, &maxslp, &siz, NULL, 0) < 0) { 132 warnx("maxslp: failed to get vm.maxslp"); 133 eval = rval = 1; 134 } 135 } 136 return (rval); 137 } 138 139 void 140 nlisterr(struct nlist nl[]) 141 { 142 int i; 143 144 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 145 for (i = 0; nl[i].n_name != NULL; i++) 146 if (nl[i].n_value == 0) 147 (void)fprintf(stderr, " %s", nl[i].n_name); 148 (void)fprintf(stderr, "\n"); 149 } 150