/*- * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1988, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #if 0 #ifndef lint static char sccsid[] = "@(#)ktrace.c 8.1 (Berkeley) 6/6/93"; #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include "ktrace.h" static char def_tracefile[] = DEF_TRACEFILE; static enum clear { NOTSET, CLEAR, CLEARALL } clear = NOTSET; static int pid; static void no_ktrace(int); static void set_pid_clear(const char *, enum clear); static void usage(void); int main(int argc, char *argv[]) { int append, ch, fd, inherit, ops, trpoints; const char *tracefile; mode_t omask; struct stat sb; append = ops = inherit = 0; trpoints = DEF_POINTS; tracefile = def_tracefile; while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != -1) switch((char)ch) { case 'a': append = 1; break; case 'C': set_pid_clear("1", CLEARALL); break; case 'c': set_pid_clear(NULL, CLEAR); break; case 'd': ops |= KTRFLAG_DESCEND; break; case 'f': tracefile = optarg; break; case 'g': set_pid_clear(optarg, NOTSET); pid = -pid; break; case 'i': inherit = 1; break; case 'p': set_pid_clear(optarg, NOTSET); break; case 't': trpoints = getpoints(optarg); if (trpoints < 0) { warnx("unknown facility in %s", optarg); usage(); } break; default: usage(); } argv += optind; argc -= optind; /* must have either -[Cc], a pid or a command */ if (clear == NOTSET && pid == 0 && argc == 0) usage(); /* can't have both a pid and a command */ /* (note that -C sets pid to 1) */ if (pid != 0 && argc > 0) { usage(); } if (inherit) trpoints |= KTRFAC_INHERIT; (void)signal(SIGSYS, no_ktrace); if (clear != NOTSET) { if (clear == CLEARALL) { ops = KTROP_CLEAR | KTRFLAG_DESCEND; trpoints = ALL_POINTS; } else { ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE; } if (ktrace(tracefile, ops, trpoints, pid) < 0) err(1, "%s", tracefile); exit(0); } omask = umask(S_IRWXG|S_IRWXO); if (append) { if ((fd = open(tracefile, O_CREAT | O_WRONLY | O_NONBLOCK, DEFFILEMODE)) < 0) err(1, "%s", tracefile); if (fstat(fd, &sb) != 0 || sb.st_uid != getuid()) errx(1, "refuse to append to %s not owned by you", tracefile); if (!(S_ISREG(sb.st_mode))) errx(1, "%s not regular file", tracefile); } else { if (unlink(tracefile) == -1 && errno != ENOENT) err(1, "unlink %s", tracefile); if ((fd = open(tracefile, O_CREAT | O_EXCL | O_WRONLY, DEFFILEMODE)) < 0) err(1, "%s", tracefile); } (void)umask(omask); (void)close(fd); trpoints |= PROC_ABI_POINTS; if (argc > 0) { if (ktrace(tracefile, ops, trpoints, getpid()) < 0) err(1, "%s", tracefile); execvp(*argv, argv); err(1, "exec of '%s' failed", *argv); } if (ktrace(tracefile, ops, trpoints, pid) < 0) err(1, "%s", tracefile); exit(0); } static void set_pid_clear(const char *p, enum clear cl) { intmax_t n; char *e; if (clear != NOTSET && cl != NOTSET) { /* either -c and -C or either of them twice */ warnx("only one -c or -C flag is permitted"); usage(); } if ((clear == CLEARALL && p != NULL) || (cl == CLEARALL && pid != 0)) { /* both -C and a pid or pgid */ warnx("the -C flag may not be combined with -g or -p"); usage(); } if (p != NULL && pid != 0) { /* either -p and -g or either of them twice */ warnx("only one -g or -p flag is permitted"); usage(); } if (p != NULL) { errno = 0; n = strtoimax(p, &e, 10); /* * 1) not a number, or outside the range of an intmax_t * 2) inside the range of intmax_t but outside the range * of an int, keeping in mind that the pid may be * negated if it's actually a pgid. */ if (*e != '\0' || n < 1 || errno == ERANGE || n > (intmax_t)INT_MAX || n > -(intmax_t)INT_MIN) { warnx("invalid process or group id"); usage(); } pid = n; } if (cl != NOTSET) if ((clear = cl) == CLEARALL) pid = 1; } static void usage(void) { fprintf(stderr, "%s\n%s\n", "usage: ktrace [-aCcdi] [-f trfile] [-g pgrp | -p pid] [-t trstr]", " ktrace [-adi] [-f trfile] [-t trstr] command"); exit(1); } static void no_ktrace(int sig __unused) { fprintf(stderr, "error:\t%s\n\t%s\n", "ktrace() system call not supported in the running kernel", "re-compile kernel with 'options KTRACE'"); exit(1); }