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 "$FreeBSD$"; 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 enum { NOTSET, CLEAR, CLEARALL } clear; 70 int append, ch, fd, inherit, ops, pid, pidset, trpoints; 71 char *tracefile; 72 mode_t omask; 73 struct stat sb; 74 75 clear = NOTSET; 76 append = ops = pidset = inherit = 0; 77 trpoints = DEF_POINTS; 78 tracefile = DEF_TRACEFILE; 79 while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != -1) 80 switch((char)ch) { 81 case 'a': 82 append = 1; 83 break; 84 case 'C': 85 clear = CLEARALL; 86 pidset = 1; 87 break; 88 case 'c': 89 clear = CLEAR; 90 break; 91 case 'd': 92 ops |= KTRFLAG_DESCEND; 93 break; 94 case 'f': 95 tracefile = optarg; 96 break; 97 case 'g': 98 pid = -rpid(optarg); 99 pidset = 1; 100 break; 101 case 'i': 102 inherit = 1; 103 break; 104 case 'p': 105 pid = rpid(optarg); 106 pidset = 1; 107 break; 108 case 't': 109 trpoints = getpoints(optarg); 110 if (trpoints < 0) { 111 warnx("unknown facility in %s", optarg); 112 usage(); 113 } 114 break; 115 default: 116 usage(); 117 } 118 argv += optind; 119 argc -= optind; 120 121 if (pidset && *argv || !pidset && !*argv) 122 usage(); 123 124 if (inherit) 125 trpoints |= KTRFAC_INHERIT; 126 127 (void)signal(SIGSYS, no_ktrace); 128 if (clear != NOTSET) { 129 if (clear == CLEARALL) { 130 ops = KTROP_CLEAR | KTRFLAG_DESCEND; 131 trpoints = ALL_POINTS; 132 pid = 1; 133 } else 134 ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE; 135 136 if (ktrace(tracefile, ops, trpoints, pid) < 0) 137 err(1, "%s", tracefile); 138 exit(0); 139 } 140 141 omask = umask(S_IRWXG|S_IRWXO); 142 if (append) { 143 if ((fd = open(tracefile, O_CREAT | O_WRONLY, DEFFILEMODE)) < 0) 144 err(1, "%s", tracefile); 145 if (fstat(fd, &sb) != 0 || sb.st_uid != getuid()) 146 errx(1, "Refuse to append to %s not owned by you.", 147 tracefile); 148 } else { 149 if (unlink(tracefile) == -1 && errno != ENOENT) 150 err(1, "unlink %s", tracefile); 151 if ((fd = open(tracefile, O_CREAT | O_EXCL | O_WRONLY, 152 DEFFILEMODE)) < 0) 153 err(1, "%s", tracefile); 154 } 155 (void)umask(omask); 156 (void)close(fd); 157 158 if (*argv) { 159 if (ktrace(tracefile, ops, trpoints, getpid()) < 0) 160 err(1, "%s", tracefile); 161 execvp(argv[0], &argv[0]); 162 err(1, "exec of '%s' failed", argv[0]); 163 } 164 else if (ktrace(tracefile, ops, trpoints, pid) < 0) 165 err(1, "%s", tracefile); 166 exit(0); 167 } 168 169 rpid(p) 170 char *p; 171 { 172 static int first; 173 174 if (first++) { 175 warnx("only one -g or -p flag is permitted."); 176 usage(); 177 } 178 if (!*p) { 179 warnx("illegal process id."); 180 usage(); 181 } 182 return(atoi(p)); 183 } 184 185 void 186 usage() 187 { 188 (void)fprintf(stderr, "%s\n%s\n", 189 "usage: ktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [cnisuv]", 190 " ktrace [-aCcid] [-f trfile] [-t [cnisuw] command"); 191 exit(1); 192 } 193 194 void 195 no_ktrace(sig) 196 int sig; 197 { 198 (void)fprintf(stderr, 199 "error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n"); 200 exit(1); 201 } 202