ktrace.c revision 1.30
1 /* $NetBSD: ktrace.c,v 1.30 2004/01/05 23:23:34 jmmv Exp $ */ 2 3 /*- 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)ktrace.c 8.2 (Berkeley) 4/28/95"; 41 #else 42 __RCSID("$NetBSD: ktrace.c,v 1.30 2004/01/05 23:23:34 jmmv Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/stat.h> 48 #include <sys/wait.h> 49 #include <sys/file.h> 50 #include <sys/time.h> 51 #include <sys/uio.h> 52 #include <sys/ktrace.h> 53 #include <sys/socket.h> 54 55 #include <err.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include "ktrace.h" 62 63 #ifdef KTRUSS 64 #include <string.h> 65 #include "setemul.h" 66 #endif 67 68 int main __P((int, char **)); 69 int rpid __P((char *)); 70 void usage __P((void)); 71 int do_ktrace __P((const char *, int, int,int)); 72 void no_ktrace __P((int)); 73 74 #ifdef KTRUSS 75 extern int timestamp, decimal, fancy, tail, maxdata; 76 #endif 77 78 int 79 main(argc, argv) 80 int argc; 81 char **argv; 82 { 83 enum { NOTSET, CLEAR, CLEARALL } clear; 84 int append, ch, fd, trset, ops, pid, pidset, synclog, trpoints; 85 const char *outfile; 86 #ifdef KTRUSS 87 const char *infile; 88 const char *emul_name = "netbsd"; 89 #endif 90 91 clear = NOTSET; 92 append = ops = pidset = trset = synclog = 0; 93 trpoints = 0; 94 pid = 0; /* Appease GCC */ 95 96 #ifdef KTRUSS 97 # define OPTIONS "aCce:df:g:ilm:o:p:RTt:" 98 outfile = infile = NULL; 99 #else 100 # define OPTIONS "aCcdf:g:ip:st:" 101 outfile = DEF_TRACEFILE; 102 #endif 103 104 while ((ch = getopt(argc,argv, OPTIONS)) != -1) 105 switch((char)ch) { 106 case 'a': 107 append = 1; 108 break; 109 case 'C': 110 clear = CLEARALL; 111 pidset = 1; 112 break; 113 case 'c': 114 clear = CLEAR; 115 pidset = 1; 116 break; 117 case 'd': 118 ops |= KTRFLAG_DESCEND; 119 break; 120 #ifdef KTRUSS 121 case 'e': 122 emul_name = strdup(optarg); /* it's safer to copy it */ 123 break; 124 case 'f': 125 infile = optarg; 126 break; 127 #else 128 case 'f': 129 outfile = optarg; 130 break; 131 #endif 132 case 'g': 133 pid = -rpid(optarg); 134 pidset = 1; 135 break; 136 case 'i': 137 trpoints |= KTRFAC_INHERIT; 138 break; 139 #ifdef KTRUSS 140 case 'l': 141 tail = 1; 142 break; 143 case 'm': 144 maxdata = atoi(optarg); 145 break; 146 case 'o': 147 outfile = optarg; 148 break; 149 #endif 150 case 'p': 151 pid = rpid(optarg); 152 pidset = 1; 153 break; 154 #ifdef KTRUSS 155 case 'R': 156 timestamp = 2; /* relative timestamp */ 157 break; 158 #else 159 case 's': 160 synclog = 1; 161 break; 162 #endif 163 #ifdef KTRUSS 164 case 'T': 165 timestamp = 1; 166 break; 167 #endif 168 case 't': 169 trset = 1; 170 trpoints = getpoints(trpoints, optarg); 171 if (trpoints < 0) { 172 warnx("unknown facility in %s", optarg); 173 usage(); 174 } 175 break; 176 default: 177 usage(); 178 } 179 argv += optind; 180 argc -= optind; 181 182 if (!trset) 183 trpoints |= clear == NOTSET ? DEF_POINTS : ALL_POINTS; 184 185 if ((pidset && *argv) || (!pidset && !*argv)) { 186 #ifdef KTRUSS 187 if (!infile) 188 #endif 189 usage(); 190 } 191 192 #ifdef KTRUSS 193 if (infile) { 194 dumpfile(infile, 0, trpoints); 195 exit(0); 196 } 197 198 setemul(emul_name, 0, 0); 199 #endif 200 201 /* 202 * For cleaner traces, initialize malloc now rather 203 * than in a traced subprocess. 204 */ 205 free(malloc(1)); 206 207 (void)signal(SIGSYS, no_ktrace); 208 if (clear != NOTSET) { 209 if (clear == CLEARALL) { 210 ops = KTROP_CLEAR | KTRFLAG_DESCEND; 211 trpoints = ALL_POINTS; 212 pid = 1; 213 } else 214 ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE; 215 216 (void)do_ktrace(outfile, ops, trpoints, pid); 217 exit(0); 218 } 219 220 if (outfile && strcmp(outfile, "-")) { 221 if ((fd = open(outfile, O_CREAT | O_WRONLY | 222 (append ? 0 : O_TRUNC) | (synclog ? 0 : O_SYNC), 223 DEFFILEMODE)) < 0) 224 err(1, "%s", outfile); 225 (void)close(fd); 226 } 227 228 if (*argv) { 229 #ifdef KTRUSS 230 if (do_ktrace(outfile, ops, trpoints, getpid()) == 1) { 231 execvp(argv[0], &argv[0]); 232 err(1, "exec of '%s' failed", argv[0]); 233 } 234 #else 235 (void)do_ktrace(outfile, ops, trpoints, getpid()); 236 execvp(argv[0], &argv[0]); 237 err(1, "exec of '%s' failed", argv[0]); 238 #endif 239 } else 240 (void)do_ktrace(outfile, ops, trpoints, pid); 241 exit(0); 242 } 243 244 int 245 rpid(p) 246 char *p; 247 { 248 static int first; 249 250 if (first++) { 251 warnx("only one -g or -p flag is permitted."); 252 usage(); 253 } 254 if (!*p) { 255 warnx("illegal process id."); 256 usage(); 257 } 258 return(atoi(p)); 259 } 260 261 void 262 usage() 263 { 264 #ifdef KTRUSS 265 # define LONG_OPTION "[-e emulation] [-m maxdata] [-o outfile] " 266 # define SHRT_OPTION "RT" 267 #else 268 # define LONG_OPTION "" 269 # define SHRT_OPTION "" 270 #endif 271 (void)fprintf(stderr, 272 "usage:\t%s [-aCcid%s] %s[-f trfile] [-g pgid] [-p pid] " 273 "[-t [Aaceilmnsuvw+]]\n\t%s [-aCcid%s] %s[-f trfile] [-t " 274 "[Aaceilmnsuvw+]] command\n", 275 getprogname(), SHRT_OPTION, LONG_OPTION, 276 getprogname(), SHRT_OPTION, LONG_OPTION); 277 exit(1); 278 } 279 280 static const char *ktracefile = NULL; 281 void 282 no_ktrace(sig) 283 int sig; 284 { 285 if (ktracefile) 286 (void)unlink(ktracefile); 287 (void)errx(1, "ktrace(2) system call not supported in the running" 288 " kernel; re-compile kernel with `options KTRACE'"); 289 } 290 291 int 292 do_ktrace(tracefile, ops, trpoints, pid) 293 const char *tracefile; 294 int ops; 295 int trpoints; 296 int pid; 297 { 298 int ret; 299 300 if (!tracefile || strcmp(tracefile, "-") == 0) { 301 int pi[2], dofork, fpid; 302 303 if (pipe(pi) < 0) 304 err(1, "pipe(2)"); 305 fcntl(pi[0], F_SETFD, FD_CLOEXEC|fcntl(pi[0], F_GETFD, 0)); 306 fcntl(pi[1], F_SETFD, FD_CLOEXEC|fcntl(pi[1], F_GETFD, 0)); 307 308 dofork = (pid == getpid()); 309 310 #ifdef KTRUSS 311 if (dofork) 312 fpid = fork(); 313 else 314 fpid = pid; /* XXX: Gcc */ 315 #else 316 if (dofork) 317 fpid = fork(); 318 else 319 fpid = 0; /* XXX: Gcc */ 320 #endif 321 #ifdef KTRUSS 322 if (fpid) 323 #else 324 if (!dofork || !fpid) 325 #endif 326 { 327 if (!dofork) 328 #ifdef KTRUSS 329 ret = fktrace(pi[1], ops, trpoints, fpid); 330 #else 331 ret = fktrace(pi[1], ops, trpoints, pid); 332 #endif 333 else 334 close(pi[1]); 335 #ifdef KTRUSS 336 dumpfile(NULL, pi[0], trpoints); 337 waitpid(fpid, NULL, 0); 338 #else 339 { 340 char buf[512]; 341 int n, cnt = 0; 342 343 while ((n = read(pi[0], buf, sizeof(buf)))>0) { 344 write(1, buf, n); 345 cnt += n; 346 } 347 } 348 if (dofork) 349 _exit(0); 350 #endif 351 return 0; 352 } 353 close(pi[0]); 354 #ifdef KTRUSS 355 if (dofork && !fpid) { 356 ret = fktrace(pi[1], ops, trpoints, getpid()); 357 return 1; 358 } 359 #else 360 ret = fktrace(pi[1], ops, trpoints, pid); 361 #endif 362 } else 363 ret = ktrace(ktracefile = tracefile, ops, trpoints, pid); 364 if (ret < 0) 365 err(1, "%s", tracefile); 366 return 1; 367 } 368
Indexes created Sat Sep 27 14:09:57 GMT 2025