nlist.c revision 1.17
1 /* $NetBSD: nlist.c,v 1.17 2000/06/08 13:30:39 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Simon Burge. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1990, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 */ 71 72 #include <sys/cdefs.h> 73 #ifndef lint 74 #if 0 75 static char sccsid[] = "@(#)nlist.c 8.4 (Berkeley) 4/2/94"; 76 #else 77 __RCSID("$NetBSD: nlist.c,v 1.17 2000/06/08 13:30:39 simonb Exp $"); 78 #endif 79 #endif /* not lint */ 80 81 #include <sys/param.h> 82 #include <sys/time.h> 83 #include <sys/proc.h> 84 #include <sys/resource.h> 85 #include <sys/sysctl.h> 86 87 #include <err.h> 88 #include <errno.h> 89 #include <kvm.h> 90 #include <math.h> 91 #include <nlist.h> 92 #include <stdio.h> 93 #include <string.h> 94 #include <unistd.h> 95 96 #include "ps.h" 97 98 struct nlist psnl[] = { 99 { "_fscale" }, 100 #define X_FSCALE 0 101 { "_ccpu" }, 102 #define X_CCPU 1 103 { "_physmem" }, 104 #define X_PHYSMEM 2 105 { NULL } 106 }; 107 108 double ccpu; /* kernel _ccpu variable */ 109 int nlistread; /* if nlist already read. */ 110 int mempages; /* number of pages of phys. memory */ 111 int fscale; /* kernel _fscale variable */ 112 113 #define kread(x, v) \ 114 kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v) 115 116 int 117 donlist() 118 { 119 int rval; 120 fixpt_t xccpu; 121 122 rval = 0; 123 nlistread = 1; 124 if (kvm_nlist(kd, psnl)) { 125 nlisterr(psnl); 126 eval = 1; 127 return (1); 128 } 129 if (kread(X_FSCALE, fscale)) { 130 warnx("fscale: %s", kvm_geterr(kd)); 131 eval = rval = 1; 132 } 133 if (kread(X_PHYSMEM, mempages)) { 134 warnx("avail_start: %s", kvm_geterr(kd)); 135 eval = rval = 1; 136 } 137 if (kread(X_CCPU, xccpu)) { 138 warnx("ccpu: %s", kvm_geterr(kd)); 139 eval = rval = 1; 140 } 141 ccpu = (double)xccpu / fscale; 142 return (rval); 143 } 144 145 int 146 donlist_sysctl() 147 { 148 int mib[2]; 149 size_t size; 150 fixpt_t xccpu; 151 152 nlistread = 1; 153 mib[0] = CTL_HW; 154 mib[1] = HW_PHYSMEM; 155 size = sizeof(mempages); 156 if (sysctl(mib, 2, &mempages, &size, NULL, 0) == 0) 157 mempages /= getpagesize(); 158 else 159 mempages = 0; 160 161 mib[0] = CTL_KERN; 162 mib[1] = KERN_FSCALE; 163 size = sizeof(fscale); 164 if (sysctl(mib, 2, &fscale, &size, NULL, 0) == -1) 165 fscale = (1 << 8); /* XXX Hopefully reasonable default */ 166 167 mib[0] = CTL_KERN; 168 mib[1] = KERN_CCPU; 169 size = sizeof(xccpu); 170 if (sysctl(mib, 2, &xccpu, &size, NULL, 0) == -1) 171 ccpu = exp(-1.0 / 20.0); /* XXX Hopefully reasonable default */ 172 else 173 ccpu = (double)xccpu / fscale; 174 175 return 0; 176 } 177 178 void 179 nlisterr(nl) 180 struct nlist nl[]; 181 { 182 int i; 183 184 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 185 for (i = 0; nl[i].n_name != NULL; i++) 186 if (nl[i].n_value == 0) 187 (void)fprintf(stderr, " %s", nl[i].n_name); 188 (void)fprintf(stderr, "\n"); 189 } 190
Indexes created Sat Sep 27 22:09:54 GMT 2025