Annotation of src/usr.bin/ktrace/ktrace.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: ktrace.c,v 1.4 1995/08/31 23:01:44 jtc 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. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1988, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)ktrace.c 8.2 (Berkeley) 4/28/95";
! 45: #endif
! 46: static char *rcsid = "$NetBSD: ktrace.c,v 1.4 1995/08/31 23:01:44 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/param.h>
! 50: #include <sys/stat.h>
! 51: #include <sys/file.h>
! 52: #include <sys/time.h>
! 53: #include <sys/errno.h>
! 54: #include <sys/uio.h>
! 55: #include <sys/ktrace.h>
! 56:
! 57: #include <err.h>
! 58: #include <stdio.h>
! 59: #include <unistd.h>
! 60:
! 61: #include "ktrace.h"
! 62:
! 63: void no_ktrace __P((int));
! 64: void usage __P((void));
! 65:
! 66: main(argc, argv)
! 67: int argc;
! 68: char **argv;
! 69: {
! 70: enum { NOTSET, CLEAR, CLEARALL } clear;
! 71: int append, ch, fd, inherit, ops, pid, pidset, trpoints;
! 72: char *tracefile;
! 73:
! 74: clear = NOTSET;
! 75: append = ops = pidset = inherit = 0;
! 76: trpoints = DEF_POINTS;
! 77: tracefile = DEF_TRACEFILE;
! 78: while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != EOF)
! 79: switch((char)ch) {
! 80: case 'a':
! 81: append = 1;
! 82: break;
! 83: case 'C':
! 84: clear = CLEARALL;
! 85: pidset = 1;
! 86: break;
! 87: case 'c':
! 88: clear = CLEAR;
! 89: break;
! 90: case 'd':
! 91: ops |= KTRFLAG_DESCEND;
! 92: break;
! 93: case 'f':
! 94: tracefile = optarg;
! 95: break;
! 96: case 'g':
! 97: pid = -rpid(optarg);
! 98: pidset = 1;
! 99: break;
! 100: case 'i':
! 101: inherit = 1;
! 102: break;
! 103: case 'p':
! 104: pid = rpid(optarg);
! 105: pidset = 1;
! 106: break;
! 107: case 't':
! 108: trpoints = getpoints(optarg);
! 109: if (trpoints < 0) {
! 110: warnx("unknown facility in %s", optarg);
! 111: usage();
! 112: }
! 113: break;
! 114: default:
! 115: usage();
! 116: }
! 117: argv += optind;
! 118: argc -= optind;
! 119:
! 120: if (pidset && *argv || !pidset && !*argv)
! 121: usage();
! 122:
! 123: if (inherit)
! 124: trpoints |= KTRFAC_INHERIT;
! 125:
! 126: (void)signal(SIGSYS, no_ktrace);
! 127: if (clear != NOTSET) {
! 128: if (clear == CLEARALL) {
! 129: ops = KTROP_CLEAR | KTRFLAG_DESCEND;
! 130: trpoints = ALL_POINTS;
! 131: pid = 1;
! 132: } else
! 133: ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;
! 134:
! 135: if (ktrace(tracefile, ops, trpoints, pid) < 0)
! 136: err(1, tracefile);
! 137: exit(0);
! 138: }
! 139:
! 140: if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC),
! 141: DEFFILEMODE)) < 0)
! 142: err(1, tracefile);
! 143: (void)close(fd);
! 144:
! 145: if (*argv) {
! 146: if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
! 147: err(1, tracefile);
! 148: execvp(argv[0], &argv[0]);
! 149: err(1, "exec of '%s' failed", argv[0]);
! 150: }
! 151: else if (ktrace(tracefile, ops, trpoints, pid) < 0)
! 152: err(1, tracefile);
! 153: exit(0);
! 154: }
! 155:
! 156: rpid(p)
! 157: char *p;
! 158: {
! 159: static int first;
! 160:
! 161: if (first++) {
! 162: warnx("only one -g or -p flag is permitted.");
! 163: usage();
! 164: }
! 165: if (!*p) {
! 166: warnx("illegal process id.");
! 167: usage();
! 168: }
! 169: return(atoi(p));
! 170: }
! 171:
! 172: void
! 173: usage()
! 174: {
! 175: (void)fprintf(stderr,
! 176: "usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [acgn]\n\tktrace [-aCcid] [-f trfile] [-t [acgn] command\n");
! 177: exit(1);
! 178: }
! 179:
! 180: void
! 181: no_ktrace(sig)
! 182: int sig;
! 183: {
! 184: (void)fprintf(stderr,
! 185: "error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n");
! 186: exit(1);
! 187: }
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