ktrace.c revision 18399 
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
35static 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
42static char sccsid[] = "@(#)ktrace.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45	"$Id: ktrace.c,v 1.5 1996/06/30 09:40:44 joerg Exp $";
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
62void no_ktrace __P((int));
63void usage __P((void));
64
65main(argc, argv)
66	int argc;
67	char **argv;
68{
69	extern int optind;
70	extern char *optarg;
71	enum { NOTSET, CLEAR, CLEARALL } clear;
72	int append, ch, fd, inherit, ops, pid, pidset, trpoints;
73	char *tracefile;
74	mode_t omask;
75
76	clear = NOTSET;
77	append = ops = pidset = inherit = 0;
78	trpoints = DEF_POINTS;
79	tracefile = DEF_TRACEFILE;
80	while ((ch = getopt(argc,argv,"aCcdf:g:ip:t:")) != EOF)
81		switch((char)ch) {
82		case 'a':
83			append = 1;
84			break;
85		case 'C':
86			clear = CLEARALL;
87			pidset = 1;
88			break;
89		case 'c':
90			clear = CLEAR;
91			break;
92		case 'd':
93			ops |= KTRFLAG_DESCEND;
94			break;
95		case 'f':
96			tracefile = optarg;
97			break;
98		case 'g':
99			pid = -rpid(optarg);
100			pidset = 1;
101			break;
102		case 'i':
103			inherit = 1;
104			break;
105		case 'p':
106			pid = rpid(optarg);
107			pidset = 1;
108			break;
109		case 't':
110			trpoints = getpoints(optarg);
111			if (trpoints < 0) {
112				warnx("unknown facility in %s", optarg);
113				usage();
114			}
115			break;
116		default:
117			usage();
118		}
119	argv += optind;
120	argc -= optind;
121
122	if (pidset && *argv || !pidset && !*argv)
123		usage();
124
125	if (inherit)
126		trpoints |= KTRFAC_INHERIT;
127
128	(void)signal(SIGSYS, no_ktrace);
129	if (clear != NOTSET) {
130		if (clear == CLEARALL) {
131			ops = KTROP_CLEAR | KTRFLAG_DESCEND;
132			trpoints = ALL_POINTS;
133			pid = 1;
134		} else
135			ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;
136
137		if (ktrace(tracefile, ops, trpoints, pid) < 0)
138			err(1, tracefile);
139		exit(0);
140	}
141
142	omask = umask(S_IRWXG|S_IRWXO);
143	if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC),
144	    DEFFILEMODE)) < 0)
145		err(1, tracefile);
146	(void)umask(omask);
147	(void)close(fd);
148
149	if (*argv) {
150		if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
151			err(1, tracefile);
152		execvp(argv[0], &argv[0]);
153		err(1, "exec of '%s' failed", argv[0]);
154	}
155	else if (ktrace(tracefile, ops, trpoints, pid) < 0)
156		err(1, tracefile);
157	exit(0);
158}
159
160rpid(p)
161	char *p;
162{
163	static int first;
164
165	if (first++) {
166		warnx("only one -g or -p flag is permitted.");
167		usage();
168	}
169	if (!*p) {
170		warnx("illegal process id.");
171		usage();
172	}
173	return(atoi(p));
174}
175
176void
177usage()
178{
179	(void)fprintf(stderr,
180"usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [cnisuv]\n\tktrace [-aCcid] [-f trfile] [-t [cnisuw] command\n");
181	exit(1);
182}
183
184void
185no_ktrace(sig)
186        int sig;
187{
188        (void)fprintf(stderr,
189"error:\tktrace() system call not supported in the running kernel\n\tre-compile kernel with 'options KTRACE'\n");
190        exit(1);
191}
192