1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)ktrace.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$Id: ktrace.c,v 1.4 1996/06/19 09:56:29 jraynard Exp $"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/stat.h> 50 #include <sys/file.h> 51 #include <sys/time.h> 52 #include <sys/errno.h> 53 #include <sys/uio.h> 54 #include <sys/ktrace.h> 55 56 #include <err.h> 57 #include <stdio.h> 58 #include <unistd.h> 59 60 #include "ktrace.h" 61 62 void no_ktrace __P((int)); 63 void usage __P((void)); 64 65 main(argc, argv) 66 int argc; 67 char **argv; 68 { 69 extern int optind; 70 extern char *optarg; 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:")) != EOF) 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 } 159 160 rpid(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 } 175 176 void 177 usage() 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 } 183 184 void 185 no_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