ktrace.c revision 1.4
1/* $OpenBSD: ktrace.c,v 1.4 1997/01/15 23:42:40 millert Exp $ */ 2/* $NetBSD: ktrace.c,v 1.4 1995/08/31 23:01:44 jtc Exp $ */ 3 4/*- 5 * Copyright (c) 1988, 1993 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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#ifndef lint 38static char copyright[] = 39"@(#) Copyright (c) 1988, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#ifndef lint 44#if 0 45static char sccsid[] = "@(#)ktrace.c 8.2 (Berkeley) 4/28/95"; 46#endif 47static char *rcsid = "$OpenBSD: ktrace.c,v 1.4 1997/01/15 23:42:40 millert Exp $"; 48#endif /* not lint */ 49 50#include <sys/param.h> 51#include <sys/stat.h> 52#include <sys/file.h> 53#include <sys/time.h> 54#include <sys/errno.h> 55#include <sys/uio.h> 56#include <sys/ktrace.h> 57 58#include <err.h> 59#include <stdio.h> 60#include <unistd.h> 61 62#include "ktrace.h" 63 64void no_ktrace __P((int)); 65void usage __P((void)); 66 67main(argc, argv) 68 int argc; 69 char **argv; 70{ 71 enum { NOTSET, CLEAR, CLEARALL } clear; 72 int append, ch, fd, inherit, ops, pid, pidset, trpoints; 73 char *tracefile; 74 mode_t omask; 75 76 clear = NOTSET; 77 append = ops = pidset = inherit = 0; 78 trpoints = DEF_POINTS; 79 tracefile = DEF_TRACEFILE; 80 while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != -1) 81 switch((char)ch) { 82 case 'a': 83 append = 1; 84 break; 85 case 'C': 86 clear = CLEARALL; 87 pidset = 1; 88 break; 89 case 'c': 90 clear = CLEAR; 91 break; 92 case 'd': 93 ops |= KTRFLAG_DESCEND; 94 break; 95 case 'f': 96 tracefile = optarg; 97 break; 98 case 'g': 99 pid = -rpid(optarg); 100 pidset = 1; 101 break; 102 case 'i': 103 inherit = 1; 104 break; 105 case 'p': 106 pid = rpid(optarg); 107 pidset = 1; 108 break; 109 case 't': 110 trpoints = getpoints(optarg); 111 if (trpoints < 0) { 112 warnx("unknown facility in %s", optarg); 113 usage(); 114 } 115 break; 116 default: 117 usage(); 118 } 119 argv += optind; 120 argc -= optind; 121 122 if (pidset && *argv || !pidset && !*argv) 123 usage(); 124 125 if (inherit) 126 trpoints |= KTRFAC_INHERIT; 127 128 (void)signal(SIGSYS, no_ktrace); 129 if (clear != NOTSET) { 130 if (clear == CLEARALL) { 131 ops = KTROP_CLEAR | KTRFLAG_DESCEND; 132 trpoints = ALL_POINTS; 133 pid = 1; 134 } else 135 ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE; 136 137 if (ktrace(tracefile, ops, trpoints, pid) < 0) 138 err(1, tracefile); 139 exit(0); 140 } 141 142 omask = umask(S_IRWXG|S_IRWXO); 143 if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC), 144 DEFFILEMODE)) < 0) 145 err(1, tracefile); 146 (void)umask(omask); 147 (void)close(fd); 148 149 if (*argv) { 150 if (ktrace(tracefile, ops, trpoints, getpid()) < 0) 151 err(1, tracefile); 152 execvp(argv[0], &argv[0]); 153 err(1, "exec of '%s' failed", argv[0]); 154 } 155 else if (ktrace(tracefile, ops, trpoints, pid) < 0) 156 err(1, tracefile); 157 exit(0); 158} 159 160rpid(p) 161 char *p; 162{ 163 static int first; 164 165 if (first++) { 166 warnx("only one -g or -p flag is permitted."); 167 usage(); 168 } 169 if (!*p) { 170 warnx("illegal process id."); 171 usage(); 172 } 173 return(atoi(p)); 174} 175 176void 177usage() 178{ 179 (void)fprintf(stderr, 180"usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [acgn]\n\tktrace [-aCcid] [-f trfile] [-t [acgn] command\n"); 181 exit(1); 182} 183 184void 185no_ktrace(sig) 186 int sig; 187{ 188 (void)fprintf(stderr, 189"error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n"); 190 exit(1); 191} 192