ktrace.c revision 8874 
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
41static char sccsid[] = "@(#)ktrace.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/stat.h>
46#include <sys/file.h>
47#include <sys/time.h>
48#include <sys/errno.h>
49#include <sys/uio.h>
50#include <sys/ktrace.h>
51#include <stdio.h>
52#include <signal.h>
53#include "ktrace.h"
54
55void noktrace() {
56	(void)fprintf(stderr, "ktrace: ktrace not enabled in kernel,to use ktrace\n");
57	(void)fprintf(stderr, "you need to add a line \"options KTRACE\" to your kernel\n");
58	exit(1);
59}
60
61main(argc, argv)
62	int argc;
63	char **argv;
64{
65	extern int optind;
66	extern char *optarg;
67	enum { NOTSET, CLEAR, CLEARALL } clear;
68	int append, ch, fd, inherit, ops, pid, pidset, trpoints;
69	char *tracefile;
70
71	clear = NOTSET;
72	append = ops = pidset = inherit = 0;
73	trpoints = DEF_POINTS;
74	tracefile = DEF_TRACEFILE;
75	/* set up a signal handler for SIGSYS, this indicates that ktrace
76	is not enabled in the kernel */
77	signal(SIGSYS, noktrace);
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				(void)fprintf(stderr,
111				    "ktrace: unknown facility in %s\n", optarg);
112				usage();
113			}
114			break;
115		default:
116			usage();
117		}
118	argv += optind;
119	argc -= optind;
120
121	if (pidset && *argv || !pidset && !*argv)
122		usage();
123
124	if (inherit)
125		trpoints |= KTRFAC_INHERIT;
126
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			error(tracefile);
137		exit(0);
138	}
139
140	if ((fd = open(tracefile, O_CREAT | O_WRONLY | (append ? 0 : O_TRUNC),
141	    DEFFILEMODE)) < 0)
142		error(tracefile);
143	(void)close(fd);
144
145	if (*argv) {
146		if (ktrace(tracefile, ops, trpoints, getpid()) < 0)
147			error();
148		execvp(argv[0], &argv[0]);
149		error(argv[0]);
150		exit(1);
151	}
152	else if (ktrace(tracefile, ops, trpoints, pid) < 0)
153		error(tracefile);
154	exit(0);
155}
156
157rpid(p)
158	char *p;
159{
160	static int first;
161
162	if (first++) {
163		(void)fprintf(stderr,
164		    "ktrace: only one -g or -p flag is permitted.\n");
165		usage();
166	}
167	if (!*p) {
168		(void)fprintf(stderr, "ktrace: illegal process id.\n");
169		usage();
170	}
171	return(atoi(p));
172}
173
174error(name)
175	char *name;
176{
177	(void)fprintf(stderr, "ktrace: %s: %s.\n", name, strerror(errno));
178	exit(1);
179}
180
181usage()
182{
183	(void)fprintf(stderr,
184"usage:\tktrace [-aCcid] [-f trfile] [-g pgid] [-p pid] [-t [acgn]\n\tktrace [-aCcid] [-f trfile] [-t [acgn] command\n");
185	exit(1);
186}
187