ktrace.c revision 1.1 
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
37static 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
44static char sccsid[] = "@(#)ktrace.c	8.2 (Berkeley) 4/28/95";
45#endif
46static 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
63void no_ktrace __P((int));
64void usage __P((void));
65
66main(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
156rpid(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
172void
173usage()
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
180void
181no_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}
188